Line of Evidence (LOE) for Decision ID 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276986 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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, 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 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: 207R00788 (San Ramon Creek 250m North of Paraiso Drive, San Ramon-207R00788). |
Temporal Representation: |
The samples were collected between the dates of 2013-05-15 and 2013-05-15 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276988 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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, 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 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: 207R00271 (Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276736 |
|
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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, 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 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: 207R00379 (Green Valley Creek, West Branch). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276989 |
|
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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, 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 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: 207R00651 (Sans Crainte Creek). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
277008 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00891 (Green Valley Creek). |
Temporal Representation: |
The samples were collected between the dates of 2015-04-22 and 2015-04-22 |
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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276987 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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, 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 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: 207R00532 (Sycamore Creek 500m upstream from Sycamore Valley Road West near Messian Place, Danville-207R00532). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276737 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01163 (San Ramon Creek, 1.7 mi. SSE of Walnut Creek, South Main St.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276738 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01227 (San Ramon Creek, 2.5 mi. SSE of Walnut Creek, Danville Blvd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 144184, Alkalinity as CaCO3
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276754 |
|
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 SWAMP Perennial Stream Surveys data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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, Habitat, 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: 207PS0150 (San Ramon Creek ~0.2mi above Livorna Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2012-06-13 and 2012-06-13 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279860 |
|
Pollutant: |
Ammonia (Unionized) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R01227 (San Ramon Creek, 2.5 mi. SSE of Walnut Creek, Danville Blvd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279924 |
|
Pollutant: |
Ammonia (Unionized) |
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 SWAMP Perennial Stream Surveys data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N, Unionized. |
Data Reference: |
Field, Habitat, 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, 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: 207PS0150 (San Ramon Creek ~0.2mi above Livorna Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2012-06-13 and 2012-06-13 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279902 |
|
Pollutant: |
Ammonia (Unionized) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R01163 (San Ramon Creek, 1.7 mi. SSE of Walnut Creek, South Main St.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
277838 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2016 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R01611 (San Ramon Creek). |
Temporal Representation: |
The samples were collected between the dates of 2016-05-10 and 2016-05-10 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2016. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278468 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 SWAMP Perennial Stream Surveys data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
Data Reference: |
Field, Habitat, 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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207PS0150 (San Ramon Creek ~0.2mi above Livorna Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2012-06-13 and 2012-06-13 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
277720 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R01860 (Diablo Creek, off Blackhawk Rd, near Jacaranda Dr). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-16 and 2017-05-16 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278704 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R00532 (Sycamore Creek 500m upstream from Sycamore Valley Road West near Messian Place, Danville-207R00532). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278221 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 BASMAA RMC Monitoring in WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R00651 (Sans Crainte Creek). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278222 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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: |
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R01227 (San Ramon Creek, 2.5 mi. SSE of Walnut Creek, Danville Blvd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278467 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R02075 (San Ramon Creek, 240m ENE of Danville Blvd and Vine Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-18 and 2020-06-18 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278885 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R01675 (Sans Crainte Creek, near the intersection of Rudgear Rd and Covington Ct). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-15 and 2017-05-15 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278711 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R00271 (Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278332 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R02884 (Sycamore Creek, 75m N of Barrenger Drive and Chadbourne Drive intersection curve). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-08 and 2020-06-08 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278290 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R00379 (Green Valley Creek, West Branch). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278314 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R01931 (San Ramon Creek, off Glade Ln, near Arbor Ln). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-15 and 2017-06-15 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278977 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R01812 (Sycamore Creek, near the intersection of Old Orchard Dr and Sycamore Valley Rd W). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-18 and 2017-05-18 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278293 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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: |
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R01163 (San Ramon Creek, 1.7 mi. SSE of Walnut Creek, South Main St.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278707 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R00788 (San Ramon Creek 250m North of Paraiso Drive, San Ramon-207R00788). |
Temporal Representation: |
The samples were collected between the dates of 2013-05-15 and 2013-05-15 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
278315 |
|
Pollutant: |
Nitrogen, ammonia (Total Ammonia) |
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N. |
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 Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document. |
Objective/Criterion Reference: |
Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site: 207R03087 (Sycamore Creek, 40m S of Pepperwood Drive and Pepperwood Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-05-27 and 2020-05-27 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279600 |
|
Pollutant: |
Ammonia (Unionized) |
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 BASMAA RMC Monitoring in WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00651 (Sans Crainte Creek). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279356 |
|
Pollutant: |
Ammonia (Unionized) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R01931 (San Ramon Creek, off Glade Ln, near Arbor Ln). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-15 and 2017-06-15 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279435 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R00788 (San Ramon Creek 250m North of Paraiso Drive, San Ramon-207R00788). |
Temporal Representation: |
The samples were collected between the dates of 2013-05-15 and 2013-05-15 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279358 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R02075 (San Ramon Creek, 240m ENE of Danville Blvd and Vine Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-18 and 2020-06-18 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279253 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R02884 (Sycamore Creek, 75m N of Barrenger Drive and Chadbourne Drive intersection curve). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-08 and 2020-06-08 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279436 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R00271 (Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279859 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R00379 (Green Valley Creek, West Branch). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279737 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R03087 (Sycamore Creek, 40m S of Pepperwood Drive and Pepperwood Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-05-27 and 2020-05-27 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279799 |
|
Pollutant: |
Ammonia (Unionized) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R01812 (Sycamore Creek, near the intersection of Old Orchard Dr and Sycamore Valley Rd W). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-18 and 2017-05-18 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279798 |
|
Pollutant: |
Ammonia (Unionized) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R01675 (Sans Crainte Creek, near the intersection of Rudgear Rd and Covington Ct). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-15 and 2017-05-15 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279861 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2016 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R01611 (San Ramon Creek). |
Temporal Representation: |
The samples were collected between the dates of 2016-05-10 and 2016-05-10 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2016. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279355 |
|
Pollutant: |
Ammonia (Unionized) |
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R01860 (Diablo Creek, off Blackhawk Rd, near Jacaranda Dr). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-16 and 2017-05-16 |
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 151011, Ammonia
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
279434 |
|
Pollutant: |
Ammonia (Unionized) |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 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: 207R00532 (Sycamore Creek 500m upstream from Sycamore Valley Road West near Messian Place, Danville-207R00532). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306274 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R01812 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.403 to 0.403. |
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 207R01812. |
Temporal Representation: |
Samples were collected from 5/18/2017 to 5/18/2017. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306275 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R01931 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.626 to 0.626. |
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 207R01931. |
Temporal Representation: |
Samples were collected from 6/15/2017 to 6/15/2017. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306317 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R01675 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.399 to 0.399. |
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 207R01675. |
Temporal Representation: |
Samples were collected from 5/15/2017 to 5/15/2017. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306311 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R00379 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.379397 to 0.379397. |
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 207R00379. |
Temporal Representation: |
Samples were collected from 4/21/2014 to 4/21/2014. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306310 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R00788 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.571666 to 0.571666. |
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 207R00788. |
Temporal Representation: |
Samples were collected from 5/15/2013 to 5/15/2013. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306306 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207CE0230 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.617122352 to 0.617122352. |
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 207CE0230. |
Temporal Representation: |
Samples were collected from 5/24/2006 to 5/24/2006. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
270219 |
|
Pollutant: |
Bifenthrin |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and the results are as follows: 1 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): 207R00271 (Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2013-07-09 to 2013-07-09 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
270163 |
|
Pollutant: |
Bifenthrin |
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 WY2015 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Bifenthrin . |
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: |
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): 207R00891 (Green Valley Creek). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2015-07-07 to 2015-07-07 |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276098 |
|
Pollutant: |
Pyrethroids |
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Pyrethroids . |
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 the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006). |
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: |
Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15 |
Guideline Reference: |
Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92. |
Guideline Reference: |
Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396. |
Guideline Reference: |
Compilation of freshwater OC-normalized sediment toxicity data for pyrethroids |
Guideline Reference: |
Pyrethroid insecticides and sediment toxicity in urban creeks from California and Tennessee. Environmental Science and Technology, 40(5): 1700-1706 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 207R00271 (Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2013-07-09 to 2013-07-09 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
276044 |
|
Pollutant: |
Pyrethroids |
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 WY2015 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Pyrethroids . |
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: |
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 the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006). |
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: |
Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15 |
Guideline Reference: |
Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92. |
Guideline Reference: |
Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396. |
Guideline Reference: |
Compilation of freshwater OC-normalized sediment toxicity data for pyrethroids |
Guideline Reference: |
Pyrethroid insecticides and sediment toxicity in urban creeks from California and Tennessee. Environmental Science and Technology, 40(5): 1700-1706 |
|
Spatial Representation: |
Data were collected from 1 station(s). Station Code(s): 207R00891 (Green Valley Creek). |
Temporal Representation: |
Data for this waterbody were collected over the date range 2015-07-07 to 2015-07-07 |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
268688 |
|
Pollutant: |
Toxicity |
LOE Subgroup: |
Toxicity |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm Freshwater Habitat |
|
Number of Samples: |
3 |
Number of Exceedances: |
2 |
|
Data and Information Type: |
TOXICITY TESTING |
Data Used to Assess Water Quality: |
2 of the 3 samples collected by BASMAA RMC Monitoring in WY2015 for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) exhibited 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: Ceriodaphnia dubia for Survival, Pimephales promelas for Biomass (wt/orig indiv), Hyalella azteca for Survival, Selenastrum capricornutum for Total Cell Count, Ceriodaphnia dubia for Young/female, Pimephales promelas for Survival. The following tests exhibited toxicity: Hyalella azteca for Survival on 2015-02-06, Hyalella azteca for Survival on 2015-04-07. |
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: |
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: |
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated. |
Guideline Reference: |
Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013 |
|
Spatial Representation: |
The samples were collected at monitoring site: 207R00891 ( Green Valley Creek ). |
Temporal Representation: |
The samples were collected between the dates of 2015-02-06 and 2015-07-07. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
268569 |
|
Pollutant: |
Toxicity |
LOE Subgroup: |
Toxicity |
Matrix: |
Sediment |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 WY2015 for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) exhibited 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 Growth (wt/surv indiv), Hyalella azteca for Survival. The following tests exhibited toxicity: Hyalella azteca for Growth (wt/surv indiv) on 2015-07-07. |
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: |
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: |
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated. |
Guideline Reference: |
Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013 |
|
Spatial Representation: |
The samples were collected at monitoring site: 207R00891 ( Green Valley Creek ). |
Temporal Representation: |
The samples were collected between the dates of 2015-07-07 and 2015-07-07. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
268598 |
|
Pollutant: |
Toxicity |
LOE Subgroup: |
Toxicity |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 WY2013 for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) exhibited 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: Ceriodaphnia dubia for Survival, Pimephales promelas for Biomass (wt/orig indiv), Selenastrum capricornutum for Total Cell Count, Ceriodaphnia dubia for Young/female, Pimephales promelas for Survival, Hyalella azteca for Survival. The following tests exhibited toxicity: Pimephales promelas for Biomass (wt/orig indiv) on 2013-07-09, Hyalella azteca for Survival on 2013-07-09, Pimephales promelas for Survival on 2013-07-09. |
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: |
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated. |
Guideline Reference: |
Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013 |
|
Spatial Representation: |
The samples were collected at monitoring site: 207R00271 ( Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271 ). |
Temporal Representation: |
The samples were collected between the dates of 2013-03-06 and 2013-07-09. |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
268605 |
|
Pollutant: |
Toxicity |
LOE Subgroup: |
Toxicity |
Matrix: |
Sediment |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 WY2013 for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) exhibited 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 Growth (wt/surv indiv), Hyalella azteca for Survival. The following tests exhibited toxicity: Hyalella azteca for Growth (wt/surv indiv) on 2013-07-09, Hyalella azteca for Survival on 2013-07-09. |
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: |
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated. |
Guideline Reference: |
Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013 |
|
Spatial Representation: |
The samples were collected at monitoring site: 207R00271 ( Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271 ). |
Temporal Representation: |
The samples were collected between the dates of 2013-07-09 and 2013-07-09. |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306315 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R01227 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.496947 to 0.496947. |
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 207R01227. |
Temporal Representation: |
Samples were collected from 5/4/2015 to 5/4/2015. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306312 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R00651 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.316451 to 0.316451. |
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 207R00651. |
Temporal Representation: |
Samples were collected from 4/21/2014 to 4/21/2014. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306318 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R01860 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.4285926 to 0.4285926. |
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 207R01860. |
Temporal Representation: |
Samples were collected from 5/16/2017 to 5/16/2017. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306308 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R00271 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.3256 to 0.3256. |
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 207R00271. |
Temporal Representation: |
Samples were collected from 4/29/2013 to 4/29/2013. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306313 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R00891 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.357506 to 0.357506. |
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 207R00891. |
Temporal Representation: |
Samples were collected from 4/22/2015 to 4/22/2015. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306316 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R01611 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.600474 to 0.600474. |
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 207R01611. |
Temporal Representation: |
Samples were collected from 5/10/2016 to 5/10/2016. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306309 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R00532 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.388261 to 0.388261. |
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 207R00532. |
Temporal Representation: |
Samples were collected from 4/29/2013 to 4/29/2013. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306307 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207PS0150 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.567103605 to 0.567103605. |
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 207PS0150. |
Temporal Representation: |
Samples were collected from 6/13/2012 to 6/13/2012. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306305 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207CE0058 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.500246291 to 0.500246291. |
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 207CE0058. |
Temporal Representation: |
Samples were collected from 5/19/2004 to 5/19/2004. |
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 154236, Benthic Community Effects
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
306314 |
|
Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
LOE Subgroup: |
Population/Community Degradation |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Warm 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 207R01163 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.620409 to 0.620409. |
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 207R01163. |
Temporal Representation: |
Samples were collected from 5/4/2015 to 5/4/2015. |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
280991 |
|
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 Perennial Stream Surveys data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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, 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: 207PS0150 (San Ramon Creek ~0.2mi above Livorna Rd.). |
Temporal Representation: |
The samples were collected between the dates of 2012-06-13 and 2012-06-13 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
280670 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00891 (Green Valley Creek). |
Temporal Representation: |
The samples were collected between the dates of 2015-04-22 and 2015-04-22 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281467 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00271 (Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
280835 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01675 (Sans Crainte Creek, near the intersection of Rudgear Rd and Covington Ct). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-15 and 2017-05-15 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281814 |
|
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R02884 (Sycamore Creek, 75m N of Barrenger Drive and Chadbourne Drive intersection curve). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-08 and 2020-06-08 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281731 |
|
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R03087 (Sycamore Creek, 40m S of Pepperwood Drive and Pepperwood Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-05-27 and 2020-05-27 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281124 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00532 (Sycamore Creek 500m upstream from Sycamore Valley Road West near Messian Place, Danville-207R00532). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281340 |
|
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00379 (Green Valley Creek, West Branch). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
280659 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01860 (Diablo Creek, off Blackhawk Rd, near Jacaranda Dr). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-16 and 2017-05-16 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281497 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00788 (San Ramon Creek 250m North of Paraiso Drive, San Ramon-207R00788). |
Temporal Representation: |
The samples were collected between the dates of 2013-05-15 and 2013-05-15 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
280980 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01163 (San Ramon Creek, 1.7 mi. SSE of Walnut Creek, South Main St.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281359 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01931 (San Ramon Creek, off Glade Ln, near Arbor Ln). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-15 and 2017-06-15 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
280660 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01812 (Sycamore Creek, near the intersection of Old Orchard Dr and Sycamore Valley Rd W). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-18 and 2017-05-18 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281973 |
|
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R02075 (San Ramon Creek, 240m ENE of Danville Blvd and Vine Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-18 and 2020-06-18 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281128 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01227 (San Ramon Creek, 2.5 mi. SSE of Walnut Creek, Danville Blvd.). |
Temporal Representation: |
The samples were collected between the dates of 2015-05-04 and 2015-05-04 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
281525 |
|
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00651 (Sans Crainte Creek). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 144163, Chloride
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
280805 |
|
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 WY2016 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01611 (San Ramon Creek). |
Temporal Representation: |
The samples were collected between the dates of 2016-05-10 and 2016-05-10 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2016. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282493 |
|
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R02884 (Sycamore Creek, 75m N of Barrenger Drive and Chadbourne Drive intersection curve). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-08 and 2020-06-08 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282743 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01812 (Sycamore Creek, near the intersection of Old Orchard Dr and Sycamore Valley Rd W). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-18 and 2017-05-18 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282628 |
|
Pollutant: |
Chlorine |
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 BASMAA RMC Monitoring in WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) to determine beneficial use support and results are as follows: 0 of 2 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: 207R00271 (Tributary of Sycamore Creek at 3016 Deer Meadow Dr, Danville-207R00271). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-07-09 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282661 |
|
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00379 (Green Valley Creek, West Branch). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282742 |
|
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 WY2016 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01611 (San Ramon Creek). |
Temporal Representation: |
The samples were collected between the dates of 2016-05-10 and 2016-05-10 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2016. Creek Status and Pesticides & Toxicity Monitoring Quality Assurance Project. |
QAPP Information Reference(s): |
Creek Status Monitoring Program
Quality Assurance Project Plan |
|
Line of Evidence (LOE) for Decision ID 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282617 |
|
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R02075 (San Ramon Creek, 240m ENE of Danville Blvd and Vine Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-06-18 and 2020-06-18 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282234 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00532 (Sycamore Creek 500m upstream from Sycamore Valley Road West near Messian Place, Danville-207R00532). |
Temporal Representation: |
The samples were collected between the dates of 2013-04-29 and 2013-04-29 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282665 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01860 (Diablo Creek, off Blackhawk Rd, near Jacaranda Dr). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-16 and 2017-05-16 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282832 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01675 (Sans Crainte Creek, near the intersection of Rudgear Rd and Covington Ct). |
Temporal Representation: |
The samples were collected between the dates of 2017-05-15 and 2017-05-15 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282651 |
|
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 San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R01931 (San Ramon Creek, off Glade Ln, near Arbor Ln). |
Temporal Representation: |
The samples were collected between the dates of 2017-06-15 and 2017-06-15 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282745 |
|
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 WY2014 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00651 (Sans Crainte Creek). |
Temporal Representation: |
The samples were collected between the dates of 2014-04-21 and 2014-04-21 |
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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282684 |
|
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 WY2013 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R00788 (San Ramon Creek 250m North of Paraiso Drive, San Ramon-207R00788). |
Temporal Representation: |
The samples were collected between the dates of 2013-05-15 and 2013-05-15 |
Environmental Conditions: |
|
QAPP Information: |
EOA, Inc.. 2012. 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 144164, Chlorine
|
Region 2 |
San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) |
|
|
LOE ID: |
282727 |
|
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 WY2020 data for San Ramon Creek subwatershed (Contra Costa County, tributary to Walnut Creek) 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: 207R03087 (Sycamore Creek, 40m S of Pepperwood Drive and Pepperwood Lane intersection). |
Temporal Representation: |
The samples were collected between the dates of 2020-05-27 and 2020-05-27 |
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 |
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