Line of Evidence (LOE) for Decision ID 144494, Alkalinity as CaCO3
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
277160 |
|
Pollutant: |
Alkalinity as CaCO3 |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Alkalinity as CaCO3. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2019-04-02 and 2019-05-14 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144494, Alkalinity as CaCO3
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
277140 |
|
Pollutant: |
Alkalinity as CaCO3 |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144494, Alkalinity as CaCO3
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
277142 |
|
Pollutant: |
Alkalinity as CaCO3 |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Alkalinity as CaCO3. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2019-06-10 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144494, Alkalinity as CaCO3
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
277159 |
|
Pollutant: |
Alkalinity as CaCO3 |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Alkalinity as CaCO3. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2019-06-10 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144494, Alkalinity as CaCO3
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
277141 |
|
Pollutant: |
Alkalinity as CaCO3 |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Alkalinity as CaCO3. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2019-04-02 and 2019-05-14 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144494, Alkalinity as CaCO3
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
277143 |
|
Pollutant: |
Alkalinity as CaCO3 |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144465, Anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269594 |
|
Pollutant: |
Anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for anthracene is the probable effect concentration (PEC) of 845 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144465, Anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269531 |
|
Pollutant: |
Anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for anthracene is the probable effect concentration (PEC) of 845 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144465, Anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269715 |
|
Pollutant: |
Anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for anthracene is the probable effect concentration (PEC) of 845 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144465, Anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269694 |
|
Pollutant: |
Anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for anthracene is the probable effect concentration (PEC) of 845 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144466, Arsenic
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269557 |
|
Pollutant: |
Arsenic |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for arsenic is the probable effect concentration (PEC) of 33 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144466, Arsenic
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269643 |
|
Pollutant: |
Arsenic |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for arsenic is the probable effect concentration (PEC) of 33 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144466, Arsenic
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269726 |
|
Pollutant: |
Arsenic |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for arsenic is the probable effect concentration (PEC) of 33 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144466, Arsenic
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
280167 |
|
Pollutant: |
Arsenic |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000) |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144466, Arsenic
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269820 |
|
Pollutant: |
Arsenic |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for arsenic is the probable effect concentration (PEC) of 33 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144466, Arsenic
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
280274 |
|
Pollutant: |
Arsenic |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000) |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
306765 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
Benthic macroinvertebrate surveys |
Data Used to Assess Water Quality: |
Water Board staff assessed data for 204R03033 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.492564009 to 0.492564009. |
Data Reference: |
California Stream Condition Index (CSCI) Scores for the 2024 Integrated Report for Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use. |
Guideline Reference: |
Bioassessment in complex environments: designing an
index for consistent meaning in different settings
|
|
Spatial Representation: |
Samples were collected from station 204R03033. |
Temporal Representation: |
Samples were collected from 6/12/2017 to 6/12/2017. |
Environmental Conditions: |
|
QAPP Information: |
Data were collected according to BASMAA Regional Monitoring Coalition sampling protocols. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
306776 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
Benthic macroinvertebrate surveys |
Data Used to Assess Water Quality: |
Water Board staff assessed data for 204ALP180 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.588330575 to 0.588330575. |
Data Reference: |
California Stream Condition Index (CSCI) Scores for the 2024 Integrated Report for Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use. |
Guideline Reference: |
Bioassessment in complex environments: designing an
index for consistent meaning in different settings
|
|
Spatial Representation: |
Samples were collected from station 204ALP180. |
Temporal Representation: |
Samples were collected from 5/14/2019 to 5/14/2019. |
Environmental Conditions: |
|
QAPP Information: |
Data were collected using Surface Water Ambient Monitoring Program protocols |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
306764 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
Benthic macroinvertebrate surveys |
Data Used to Assess Water Quality: |
Water Board staff assessed data for 204R02457 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.481876 to 0.481876. |
Data Reference: |
California Stream Condition Index (CSCI) Scores for the 2024 Integrated Report for Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use. |
Guideline Reference: |
Bioassessment in complex environments: designing an
index for consistent meaning in different settings
|
|
Spatial Representation: |
Samples were collected from station 204R02457. |
Temporal Representation: |
Samples were collected from 5/19/2015 to 5/19/2015. |
Environmental Conditions: |
|
QAPP Information: |
Data were collected according to BASMAA Regional Monitoring Coalition sampling protocols. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
306775 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
3 |
|
Data and Information Type: |
Benthic macroinvertebrate surveys |
Data Used to Assess Water Quality: |
Water Board staff assessed data for 204ALP145 to determine beneficial use support and the results are as follows: 3 of 3 samples exceeded the threshold. CSCI scores were from 0.394321554 to 0.452331837. |
Data Reference: |
California Stream Condition Index (CSCI) Scores for the 2024 Integrated Report for Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use. |
Guideline Reference: |
Bioassessment in complex environments: designing an
index for consistent meaning in different settings
|
|
Spatial Representation: |
Samples were collected from station 204ALP145. |
Temporal Representation: |
Samples were collected from 5/9/2018 to 6/10/2019. |
Environmental Conditions: |
|
QAPP Information: |
Data were collected using Surface Water Ambient Monitoring Program protocols |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
268857 |
|
Pollutant: |
Toxicity |
LOE Subgroup: |
Toxicity |
Matrix: |
Water |
Fraction: |
TST |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
TOXICITY TESTING |
Data Used to Assess Water Quality: |
1 of the 1 samples collected by BASMAA RMC Monitoring in WY2020 for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) exhibited toxicity. All samples met the requirements of the State Policy for Water Quality Control: Toxicity Provisions. This includes utilizing the Test of Significant Toxicity (TST) and using toxicity testing methods provided in the Provisions to assess water column toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Ceriodaphnia dubia for Young/female, Pimephales promelas for Biomass (wt/orig indiv), Selenastrum capricornutum for Total Cell Count. The following tests exhibited toxicity: Ceriodaphnia dubia for Young/female on 2020-07-22. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. Detrimental responses include, but are not limited to, decreased growth rate and decreased reproductive success of resident or indicator species. There shall be no acute toxicity in ambient waters. Acute toxicity is defined as a median of less than 90 percent survival, or less than 70 percent survival, 10 percent of the time, of test organisms in a 96-hour static or continuous flow test. There shall be no chronic toxicity in ambient waters. Chronic toxicity is a detrimental biological effect on growth rate, reproduction, fertilization success, larval development, population abundance, community composition, or any other relevant measure of the health of an organism, population, or community. Attainment of this objective will be determined by analyses of indicator organisms, species diversity, population density, growth anomalies, or toxicity tests (including those described in Chapter 4), or other methods selected by the Water Board. The Water Board will also consider other relevant information and numeric criteria and guidelines for toxic substances developed by other agencies as appropriate. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
Attainment of the water quality objective is demonstrated by conducting aquatic toxicity testing, analyzing the data using the TST statistical approach, and rejecting the null hypothesis. The null hypothesis is the following general statement: the ambient water is toxic because the response (e.g., survival, reproduction, growth) of the test organisms in the ambient water sample is less than or equal to 75 percent (chronic) or 80 percent (acute) of the test organisms’ response in the control water sample. The alternative hypothesis is the following general statement: the ambient water is not toxic because the of the test organisms in the ambient water sample is greater than 75 percent (chronic) or 80 percent (acute) of the test organisms’ response in the control water sample. |
Guideline Reference: |
Toxicity Provisions to the Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California. |
|
Spatial Representation: |
The samples were collected at monitoring site: 204ALP147 ( Arroyo Las Positas just upstream of 1st St ). |
Temporal Representation: |
The samples were collected between the dates of 2020-07-22 and 2020-07-22. |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
268928 |
|
Pollutant: |
Toxicity |
LOE Subgroup: |
Toxicity |
Matrix: |
Water |
Fraction: |
TST |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
2 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
TOXICITY TESTING |
Data Used to Assess Water Quality: |
1 of the 2 samples collected by BASMAA RMC Monitoring in WY2020 for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) exhibited toxicity. All samples met the requirements of the State Policy for Water Quality Control: Toxicity Provisions. This includes utilizing the Test of Significant Toxicity (TST) and using toxicity testing methods provided in the Provisions to assess water column toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Selenastrum capricornutum for Total Cell Count, Ceriodaphnia dubia for Young/female, Pimephales promelas for Biomass (wt/orig indiv), Hyalella azteca for Survival. The following tests exhibited toxicity: Ceriodaphnia dubia for Young/female on 2020-07-22. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. Detrimental responses include, but are not limited to, decreased growth rate and decreased reproductive success of resident or indicator species. There shall be no acute toxicity in ambient waters. Acute toxicity is defined as a median of less than 90 percent survival, or less than 70 percent survival, 10 percent of the time, of test organisms in a 96-hour static or continuous flow test. There shall be no chronic toxicity in ambient waters. Chronic toxicity is a detrimental biological effect on growth rate, reproduction, fertilization success, larval development, population abundance, community composition, or any other relevant measure of the health of an organism, population, or community. Attainment of this objective will be determined by analyses of indicator organisms, species diversity, population density, growth anomalies, or toxicity tests (including those described in Chapter 4), or other methods selected by the Water Board. The Water Board will also consider other relevant information and numeric criteria and guidelines for toxic substances developed by other agencies as appropriate. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
Attainment of the water quality objective is demonstrated by conducting aquatic toxicity testing, analyzing the data using the TST statistical approach, and rejecting the null hypothesis. The null hypothesis is the following general statement: the ambient water is toxic because the response (e.g., survival, reproduction, growth) of the test organisms in the ambient water sample is less than or equal to 75 percent (chronic) or 80 percent (acute) of the test organisms’ response in the control water sample. The alternative hypothesis is the following general statement: the ambient water is not toxic because the of the test organisms in the ambient water sample is greater than 75 percent (chronic) or 80 percent (acute) of the test organisms’ response in the control water sample. |
Guideline Reference: |
Toxicity Provisions to the Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California. |
|
Spatial Representation: |
The samples were collected at monitoring site: 204ALP180 ( channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd. ). |
Temporal Representation: |
The samples were collected between the dates of 2020-07-22 and 2020-09-09. |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
279026 |
|
Pollutant: |
Ammonia (Unionized) |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Ammonia as N, Unionized. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.20 Un-Ionized Ammonia: The discharge of wastes shall not cause receiving waters to contain concentrations of un-ionized ammonia in excess 0.025 mg/l (as N), expressed as an annual median. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 154154, Benthic Community Effects
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
279776 |
|
Pollutant: |
Ammonia (Unionized) |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Ammonia as N, Unionized. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.20 Un-Ionized Ammonia: The discharge of wastes shall not cause receiving waters to contain concentrations of un-ionized ammonia in excess 0.025 mg/l (as N), expressed as an annual median. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-05-13 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144468, Benzo(a)anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269847 |
|
Pollutant: |
Benzo(a)anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benz(a)anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benz[a]anthrazene is the probable effect concentration (PEC) of 1050 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144468, Benzo(a)anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270084 |
|
Pollutant: |
Benzo(a)anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benz(a)anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benz[a]anthrazene is the probable effect concentration (PEC) of 1050 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144468, Benzo(a)anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270119 |
|
Pollutant: |
Benzo(a)anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benz(a)anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benz[a]anthrazene is the probable effect concentration (PEC) of 1050 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144468, Benzo(a)anthracene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269830 |
|
Pollutant: |
Benzo(a)anthracene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benz(a)anthracene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benz[a]anthrazene is the probable effect concentration (PEC) of 1050 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144467, Benzo(a)pyrene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270272 |
|
Pollutant: |
Benzo(a)pyrene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benzo(a)pyrene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benzo[a]pyrene is the probable effect concentration (PEC) of 1450 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144467, Benzo(a)pyrene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
269816 |
|
Pollutant: |
Benzo(a)pyrene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benzo(a)pyrene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benzo[a]pyrene is the probable effect concentration (PEC) of 1450 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144467, Benzo(a)pyrene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270365 |
|
Pollutant: |
Benzo(a)pyrene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benzo(a)pyrene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benzo[a]pyrene is the probable effect concentration (PEC) of 1450 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144467, Benzo(a)pyrene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270325 |
|
Pollutant: |
Benzo(a)pyrene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Benzo(a)pyrene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for benzo[a]pyrene is the probable effect concentration (PEC) of 1450 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144492, Bifenthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270237 |
|
Pollutant: |
Bifenthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
Guideline Reference: |
Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144492, Bifenthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270220 |
|
Pollutant: |
Bifenthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
Guideline Reference: |
Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144492, Bifenthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270217 |
|
Pollutant: |
Bifenthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
Guideline Reference: |
Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144492, Bifenthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270318 |
|
Pollutant: |
Bifenthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
Guideline Reference: |
Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144469, Cadmium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270585 |
|
Pollutant: |
Cadmium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cadmium is the probable effect concentration (PEC) of 4.98 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144469, Cadmium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270595 |
|
Pollutant: |
Cadmium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cadmium is the probable effect concentration (PEC) of 4.98 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144469, Cadmium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
280635 |
|
Pollutant: |
Cadmium |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144469, Cadmium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270578 |
|
Pollutant: |
Cadmium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cadmium is the probable effect concentration (PEC) of 4.98 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144469, Cadmium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
280349 |
|
Pollutant: |
Cadmium |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144469, Cadmium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270819 |
|
Pollutant: |
Cadmium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cadmium is the probable effect concentration (PEC) of 4.98 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281854 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281713 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-14 and 2019-05-14 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281171 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-14 and 2019-05-14 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281897 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP151 (Arroyo Seco approx 0.25 miles above Arroyo Las Positas). |
Temporal Representation: |
The samples were collected between the dates of 2011-04-13 and 2011-08-29 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281387 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
2 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2019-06-10 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282173 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281820 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2017 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R03033 (Arroyo las Positas south of Patterson Pass Rd). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-12 and 2017-06-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc., Applied Marine Sciences, Armand Ruby Consulting . 2016. BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan. |
QAPP Information Reference(s): |
BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282141 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281170 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP151 (Arroyo Seco approx 0.25 miles above Arroyo Las Positas). |
Temporal Representation: |
The samples were collected between the dates of 2011-04-13 and 2011-08-29 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282114 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281821 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281841 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281702 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2017 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R03033 (Arroyo las Positas south of Patterson Pass Rd). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-12 and 2017-06-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc., Applied Marine Sciences, Armand Ruby Consulting . 2016. BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan. |
QAPP Information Reference(s): |
BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144470, Chloride
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
281172 |
|
Pollutant: |
Chloride |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
2 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chloride. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The chloride criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 230000 ug/L (230 mg/L)(USEPA National Recommended Water Quality Criteria, 2006). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2019-06-10 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282696 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282800 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-05-13 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282624 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2017 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R03033 (Arroyo las Positas south of Patterson Pass Rd). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-12 and 2017-06-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc., Applied Marine Sciences, Armand Ruby Consulting . 2016. BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan. |
QAPP Information Reference(s): |
BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282798 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282647 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-05-13 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282552 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2017 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R03033 (Arroyo las Positas south of Patterson Pass Rd). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-12 and 2017-06-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc., Applied Marine Sciences, Armand Ruby Consulting . 2016. BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan. |
QAPP Information Reference(s): |
BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282328 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-05-13 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144471, Chlorine
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282809 |
|
Pollutant: |
Chlorine |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorine, Total Residual. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The USEPA recommended chlorine criterion for the protection of aquatic ife in freshwater is 11 ug/L (4-day average). |
Guideline Reference: |
National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-05-13 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144472, Chlorophyll-a
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282869 |
|
Pollutant: |
Chlorophyll-a |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Chlorophyll a. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. |
Guideline Reference: |
North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-14 and 2019-05-14 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144472, Chlorophyll-a
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283027 |
|
Pollutant: |
Chlorophyll-a |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
2 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chlorophyll a. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. |
Guideline Reference: |
North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2019-06-10 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144472, Chlorophyll-a
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
282857 |
|
Pollutant: |
Chlorophyll-a |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
2 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chlorophyll a. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. |
Guideline Reference: |
North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2019-06-10 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144472, Chlorophyll-a
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283078 |
|
Pollutant: |
Chlorophyll-a |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Chlorophyll a. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. |
Guideline Reference: |
North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-14 and 2019-05-14 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144498, Chromium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270956 |
|
Pollutant: |
Chromium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chromium is the probable effect concentration (PEC) of 111 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144498, Chromium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271367 |
|
Pollutant: |
Chromium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chromium is the probable effect concentration (PEC) of 111 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144498, Chromium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283255 |
|
Pollutant: |
Chromium |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144498, Chromium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283146 |
|
Pollutant: |
Chromium |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144498, Chromium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
270938 |
|
Pollutant: |
Chromium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chromium is the probable effect concentration (PEC) of 111 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144498, Chromium
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271039 |
|
Pollutant: |
Chromium |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chromium is the probable effect concentration (PEC) of 111 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144473, Chrysene (C1-C4)
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271136 |
|
Pollutant: |
Chrysene (C1-C4) |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chrysene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chrysene is the probable effect concentration (PEC) of 1290 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144473, Chrysene (C1-C4)
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271375 |
|
Pollutant: |
Chrysene (C1-C4) |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chrysene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chrysene is the probable effect concentration (PEC) of 1290 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144473, Chrysene (C1-C4)
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271278 |
|
Pollutant: |
Chrysene (C1-C4) |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chrysene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chrysene is the probable effect concentration (PEC) of 1290 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144473, Chrysene (C1-C4)
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271094 |
|
Pollutant: |
Chrysene (C1-C4) |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chrysene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for chrysene is the probable effect concentration (PEC) of 1290 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271580 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for copper is the probable effect concentration (PEC) of 149 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283434 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Copper. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-06-12 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271417 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for copper is the probable effect concentration (PEC) of 149 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283374 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283390 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Copper. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2019-06-12 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271703 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for copper is the probable effect concentration (PEC) of 149 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283285 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Copper. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2019-06-12 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283416 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Copper. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-06-12 and 2019-08-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271446 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for copper is the probable effect concentration (PEC) of 149 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144474, Copper
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
283387 |
|
Pollutant: |
Copper |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144495, Cyfluthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271785 |
|
Pollutant: |
Cyfluthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144495, Cyfluthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271825 |
|
Pollutant: |
Cyfluthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144495, Cyfluthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271999 |
|
Pollutant: |
Cyfluthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144495, Cyfluthrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271983 |
|
Pollutant: |
Cyfluthrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144497, Cyhalothrin, Lambda
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271871 |
|
Pollutant: |
Cyhalothrin, Lambda |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144497, Cyhalothrin, Lambda
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271830 |
|
Pollutant: |
Cyhalothrin, Lambda |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144497, Cyhalothrin, Lambda
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271731 |
|
Pollutant: |
Cyhalothrin, Lambda |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144497, Cyhalothrin, Lambda
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271955 |
|
Pollutant: |
Cyhalothrin, Lambda |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144493, Cypermethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
272093 |
|
Pollutant: |
Cypermethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002). |
Guideline Reference: |
Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144493, Cypermethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
272268 |
|
Pollutant: |
Cypermethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002). |
Guideline Reference: |
Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144493, Cypermethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
272012 |
|
Pollutant: |
Cypermethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002). |
Guideline Reference: |
Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144493, Cypermethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
271994 |
|
Pollutant: |
Cypermethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002). |
Guideline Reference: |
Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144496, Deltamethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
272575 |
|
Pollutant: |
Deltamethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144496, Deltamethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
272630 |
|
Pollutant: |
Deltamethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144496, Deltamethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
272418 |
|
Pollutant: |
Deltamethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144496, Deltamethrin
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
272533 |
|
Pollutant: |
Deltamethrin |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144499, Esfenvalerate/Fenvalerate
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273145 |
|
Pollutant: |
Esfenvalerate/Fenvalerate |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144499, Esfenvalerate/Fenvalerate
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273132 |
|
Pollutant: |
Esfenvalerate/Fenvalerate |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144499, Esfenvalerate/Fenvalerate
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273218 |
|
Pollutant: |
Esfenvalerate/Fenvalerate |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144499, Esfenvalerate/Fenvalerate
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273164 |
|
Pollutant: |
Esfenvalerate/Fenvalerate |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005). |
Guideline Reference: |
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144491, Fipronil
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273157 |
|
Pollutant: |
Fipronil |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil is the median lethal concentration (LC50) of 0.13 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144491, Fipronil
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273229 |
|
Pollutant: |
Fipronil |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
0 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fipronil. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil is the median lethal concentration (LC50) of 0.13 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Date for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144491, Fipronil
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273063 |
|
Pollutant: |
Fipronil |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil is the median lethal concentration (LC50) of 0.13 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144491, Fipronil
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273120 |
|
Pollutant: |
Fipronil |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
0 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fipronil. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil is the median lethal concentration (LC50) of 0.13 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Date for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144500, Fipronil Sulfide
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273272 |
|
Pollutant: |
Fipronil Sulfide |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfide . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfide is the median lethal concentration (LC50) of 0.16 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144500, Fipronil Sulfide
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273106 |
|
Pollutant: |
Fipronil Sulfide |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfide . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfide is the median lethal concentration (LC50) of 0.16 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144500, Fipronil Sulfide
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273103 |
|
Pollutant: |
Fipronil Sulfide |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfide . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfide is the median lethal concentration (LC50) of 0.16 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144500, Fipronil Sulfide
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273140 |
|
Pollutant: |
Fipronil Sulfide |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfide . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfide is the median lethal concentration (LC50) of 0.16 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144501, Fipronil Sulfone
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273512 |
|
Pollutant: |
Fipronil Sulfone |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfone . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfone is the median lethal concentration (LC50) of 0.12 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144501, Fipronil Sulfone
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273551 |
|
Pollutant: |
Fipronil Sulfone |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfone . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfone is the median lethal concentration (LC50) of 0.12 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144501, Fipronil Sulfone
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273351 |
|
Pollutant: |
Fipronil Sulfone |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfone . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfone is the median lethal concentration (LC50) of 0.12 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144501, Fipronil Sulfone
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273392 |
|
Pollutant: |
Fipronil Sulfone |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fipronil Sulfone . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fipronil sulfone is the median lethal concentration (LC50) of 0.12 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Maul et al., 2008). |
Guideline Reference: |
Effect of sediment-associated pyrethroids, fipronil, and metabolites on Chironomus tentans growth rate, body mass, condition index, immobilization, and survival. Environ. Toxicol. Chem. 27(12):2582-2590. |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144475, Fluoranthene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273295 |
|
Pollutant: |
Fluoranthene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluoranthene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluoranthene is the probable effect concentration (PEC) of 2230 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144475, Fluoranthene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273360 |
|
Pollutant: |
Fluoranthene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluoranthene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluoranthene is the probable effect concentration (PEC) of 2230 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144475, Fluoranthene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273455 |
|
Pollutant: |
Fluoranthene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluoranthene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluoranthene is the probable effect concentration (PEC) of 2230 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144475, Fluoranthene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273319 |
|
Pollutant: |
Fluoranthene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluoranthene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluoranthene is the probable effect concentration (PEC) of 2230 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144476, Fluorene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273330 |
|
Pollutant: |
Fluorene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluorene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluorene is the probable effect concentration (PEC) for Fluorene is 536 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144476, Fluorene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273588 |
|
Pollutant: |
Fluorene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluorene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluorene is the probable effect concentration (PEC) for Fluorene is 536 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144476, Fluorene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273671 |
|
Pollutant: |
Fluorene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluorene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluorene is the probable effect concentration (PEC) for Fluorene is 536 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144476, Fluorene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
273712 |
|
Pollutant: |
Fluorene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fluorene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for fluorene is the probable effect concentration (PEC) for Fluorene is 536 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144477, Lead
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274200 |
|
Pollutant: |
Lead |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lead is the probable effect concentration (PEC) of 128 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144477, Lead
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274149 |
|
Pollutant: |
Lead |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lead is the probable effect concentration (PEC) of 128 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144477, Lead
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
284177 |
|
Pollutant: |
Lead |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144477, Lead
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274022 |
|
Pollutant: |
Lead |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lead is the probable effect concentration (PEC) of 128 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144477, Lead
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274030 |
|
Pollutant: |
Lead |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for lead is the probable effect concentration (PEC) of 128 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144477, Lead
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
284113 |
|
Pollutant: |
Lead |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144478, Naphthalene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274655 |
|
Pollutant: |
Naphthalene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Naphthalene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for naphthalene is the probable effect concentration (PEC) of 561 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144478, Naphthalene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274798 |
|
Pollutant: |
Naphthalene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Naphthalene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for naphthalene is the probable effect concentration (PEC) of 561 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144478, Naphthalene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274617 |
|
Pollutant: |
Naphthalene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Naphthalene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for naphthalene is the probable effect concentration (PEC) of 561 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144478, Naphthalene
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274901 |
|
Pollutant: |
Naphthalene |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Naphthalene . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for naphthalene is the probable effect concentration (PEC) of 561 ug/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144479, Nickel
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274888 |
|
Pollutant: |
Nickel |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for nickel is the probable effect concentration (PEC) of 48.6 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144479, Nickel
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
275041 |
|
Pollutant: |
Nickel |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Nickel . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for nickel is the probable effect concentration (PEC) of 48.6 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144479, Nickel
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
284444 |
|
Pollutant: |
Nickel |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144479, Nickel
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274846 |
|
Pollutant: |
Nickel |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Nickel . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for nickel is the probable effect concentration (PEC) of 48.6 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144479, Nickel
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
274761 |
|
Pollutant: |
Nickel |
LOE Subgroup: |
Pollutant-Sediment |
Matrix: |
Sediment |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel . |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Section 3.3.18 of the San Francisco Bay Region's Basin Plan contains the narrative toxicity objective stating that all waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce other detrimental responses in aquatic organisms. |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
The evaluation guideline for nickel is the probable effect concentration (PEC) of 48.6 mg/kg dry weight (MacDonald et al., 2000a). |
Guideline Reference: |
Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2020-07-22 to 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144479, Nickel
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
284493 |
|
Pollutant: |
Nickel |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Dissolved |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000). |
Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2018-05-09 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285936 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-05-13 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285483 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
2 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2020-07-22 and 2020-09-09 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
284958 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2020 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP147 (Arroyo Las Positas just upstream of 1st St). |
Temporal Representation: |
The samples were collected between the dates of 2020-07-22 and 2020-07-22 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2000. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285044 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
13 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 1 of 13 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP145 (Arroyo Seco behind mall at 1st Street and Hwy 580). |
Temporal Representation: |
The samples were collected between the dates of 2018-05-09 and 2019-08-26 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285175 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
7 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP180 (channelized tributary to Arroyo Seco at Patterson directly d/s from Patterson Pass Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2019-04-02 and 2019-08-26 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285612 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2017 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R03033 (Arroyo las Positas south of Patterson Pass Rd). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-12 and 2017-06-12 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc., Applied Marine Sciences, Armand Ruby Consulting . 2016. BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan. |
QAPP Information Reference(s): |
BASMAA Regional Monitoring Coalition Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285913 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP151 (Arroyo Seco approx 0.25 miles above Arroyo Las Positas). |
Temporal Representation: |
The samples were collected between the dates of 2011-04-29 and 2011-10-03 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
286259 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed SWAMP RWB2 Monitoring data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP151 (Arroyo Seco approx 0.25 miles above Arroyo Las Positas). |
Temporal Representation: |
The samples were collected between the dates of 2011-04-29 and 2011-10-03 |
Environmental Conditions: |
|
QAPP Information: |
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.. |
QAPP Information Reference(s): |
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements. |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285117 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Cold Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204ALP148 (Arroyo Las Positas upstream of Arroyo Vista). |
Temporal Representation: |
The samples were collected between the dates of 2019-05-13 and 2019-05-13 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
|
Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
|
|
LOE ID: |
285617 |
|
Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
1 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2015 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
Field, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) |
Objective/Criterion Reference: |
Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 204R02457 (Arroyo Seco approx 150 m downstream of Las Positas Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-19 and 2015-05-19 |
Environmental Conditions: |
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QAPP Information: |
EOA, Inc.. 2014. Creek Status Monitoring Program Quality Assurance Project Plan. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
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Line of Evidence (LOE) for Decision ID 144480, Oxygen, Dissolved
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Region 2 |
Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) |
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LOE ID: |
285440 |
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Pollutant: |
Oxygen, Dissolved |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
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Beneficial Use: |
Warm Freshwater Habitat |
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Number of Samples: |
1 |
Number of Exceedances: |
0 |
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Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BASMAA RMC Monitoring in WY2019 data for Arroyo Seco subwatershed (Alameda County, tributary to Arroyo Las Positas) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. |
Data Reference: |
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