Draft California 2018 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 6 - Lahontan Region

Water Body Name: Cheney Creek
Water Body ID: CAR6372005020080811014947
Water Body Type: River & Stream
 
DECISION ID
75200
Region 6     
Cheney Creek
 
Pollutant: Indicator Bacteria
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status.

Onr line of evidence is available in the administrative record to assess this pollutant. Neither of the samples exceeds the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 or Table 3.2 of the Policy.
3. Neither of two samples exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75200, Indicator Bacteria
Region 6     
Cheney Creek
 
LOE ID: 25868
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Water column surveys (e.g. fecal coliform)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Fecal coliform bacteria were not detected in either of two samples.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Lahontan Basin Plan's objective for coliform bacteria states:

"Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock waste.

The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. The log mean shall ideally be based on a minimum of not less than five samples collected a evenly spaced as practicable during any 30-day period. However, a log mean concentration exceeding 20/100 ml for any 30-day period shall indicate violation of this objective even if fewer than five samples were collected."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Two samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 75200, Indicator Bacteria
Region 6     
Cheney Creek
 
LOE ID: 25867
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Water column surveys (e.g. fecal coliform)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Fecal coliform bacteria were not detected in either of two samples.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Lahontan Basin Plan's objective for coliform bacteria states:

"Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock waste.

The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. The log mean shall ideally be based on a minimum of not less than five samples collected a evenly spaced as practicable during any 30-day period. However, a log mean concentration exceeding 20/100 ml for any 30-day period shall indicate violation of this objective even if fewer than five samples were collected."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Two samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75171
Region 6     
Cheney Creek
 
Pollutant: Nitrogen
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One line of evidence is available in the administrative record to assess this pollutant. The single sample exceeds the site-specific water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. The single sample exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75171, Nitrogen
Region 6     
Cheney Creek
 
LOE ID: 25862
 
Pollutant: Total Nitrogen as N
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Concentrations of NO3-N in two samples were 0.22 and 0.17 mg/L. The "annual average" concentration, based on only two samples, was 0.195 mg/L.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The site-specific objective for total nitrogen (from Lahontan Basin Plan Table 3-9) is an annual average of 0.01 mg/L.
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Two samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
77384
Region 6     
Cheney Creek
 
Pollutant: Nitrogen, Nitrate
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One line of evidence is available in the administrative record to assess this pollutant. Neither of the two samples exceeds the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. Neither of 2 samples exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 77384, Nitrogen, Nitrate
Region 6     
Cheney Creek
 
LOE ID: 25863
 
Pollutant: Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Concentrations of NO3-N in two samples were 0.22 and 0.17 mg/L. The MCL was not exceeded.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for nitrate is 45 mg/L expressed "as nitrate," equivalent to 10 mg/L expressed "as N."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Two samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75595
Region 6     
Cheney Creek
 
Pollutant: Oxygen, Dissolved
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Two lines of evidence, one which evaluates dissolved oxygen saturation data and one which evaluates dissolved oxygen data, are available in the administrative record to assess this pollutant. 1 of 1 samples in both evaluations exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. 1 of 1 samples in each evaluation exceed the water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 26 samples per pollutant fraction are needed to determine if a beneficial use is fully supported using table 3.2.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 75595, Oxygen, Dissolved
Region 6     
Cheney Creek
 
LOE ID: 25860
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in August 2002. The dissolved oxygen concentration in one sample was 6.85 mg/L.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The applicable water quality objective (from Lahontan Basin Plan Table 3-6) is a 1 day minimum dissolved oxygen concentration of 8 mg/L.
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: One dissolved oxygen measurement was taken on August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 75595, Oxygen, Dissolved
Region 6     
Cheney Creek
 
LOE ID: 25861
 
Pollutant: Dissolved oxygen saturation
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in August 2002. The dissolved oxygen saturation in one sample was 72.9 percent.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The regionwide narrative objective in the Lahontan Basin Plan states: "The dissolved oxygen concentration, as percent saturation, shall not be depressed by more than 10 percent, nor shall the minimum dissolved oxygen concentration be less than 80 percent of saturation."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: One dissolved oxygen measurement was taken on August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75953
Region 6     
Cheney Creek
 
Pollutant: Phosphorus
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One line of evidence is available in the administrative record to assess this pollutant. The single sample exceeds the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. The single sample exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75953, Phosphorus
Region 6     
Cheney Creek
 
LOE ID: 25864
 
Pollutant: Phosphorus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Concentrations of PO4-P in two samples were 0.81 and 0.86 mg/L. The "annual average" concentration, based on only two samples, was 0.835 mg/L.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The site-specific objective for total phosphorus (from Lahontan Basin Plan Table 3-9) is an annual average of 0.03 mg/L.
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Two samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75591
Region 6     
Cheney Creek
 
Pollutant: Sediment
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

One line of evidence is available in the administrative record to assess this pollutant. The water quality objective for sediment is antidegradation based. The two available samples cannot be used to document baseline and trend conditions to assess compliance with the objective using Listing Policy section 3.10.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. The two available samples are insufficient to assess compliance with the objective under section 3.10 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75591, Sediment
Region 6     
Cheney Creek
 
LOE ID: 25869
 
Pollutant: Sediment
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. The concentrations of suspended sediment in two samples were 7.8 and 0.7 mg/L.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Lahontan Basin Plan's narrative objective states:
"The suspended sediment load and suspended sediment discharge rate of surface waters shall not be altered in such a manner as to cause nuisance or adversely affect the water for beneficial uses."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75954
Region 6     
Cheney Creek
 
Pollutant: Specific Conductance
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

One line of evidence are available in the administrative record to assess this pollutant. Neither of two samples exceeds the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. Neither of two samples exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75954, Specific Conductance
Region 6     
Cheney Creek
 
LOE ID: 25852
 
Pollutant: Specific Conductance
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Two samples had specific conductance values of 204 and 278 uS/cm. The MCL was not exceeded.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for specific conductance is 900 microsiemens per centimeter (uS/cm).
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75699
Region 6     
Cheney Creek
 
Pollutant: Temperature, water
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

One line of evidence is available in the administrative record to assess this pollutant. The Lahontan Basin Plan's temperature objective is antidegradation-based and the available data are insufficient to document baseline and trend conditions as required by section 3.10 of the Listing Policy.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. The two available samples are insufficient to determine compliance with the objective under section 3.10 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75699, Temperature, water
Region 6     
Cheney Creek
 
LOE ID: 25858
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Two water temperature measurements were 23 and 18.39 degrees Celsius.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The relevant sections of the Lahontan Basin Plan's temperature objective are as follows: "The natural receiving water temperature of all waters shall not be altered unless it can be demonstrated to the satisfaction fo the Regional Board that such an alteration in temperature does not adversely affect the water for beneficial uses.

For waters designated WARM, water temperature shall not be altered by more than five degrees Fahrenheit ... above or below the natural temperature. For waters designated COLD, the temperature shall not be altered."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75698
Region 6     
Cheney Creek
 
Pollutant: Turbidity
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board conclusion: This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

Two lines of evidence are available in the administrative record to assess this pollutant. Nether of the two samples exceeds the Maximum Contaminant Level (MCL).

The narrative water quality objective for turbidity is an antidegradation-based objective and the three available samples are insufficient to document baseline and trend conditions as required under Listing Policy Section 3.10.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. All samples were collected within a single month.
3. Neither of two samples exceeded the MCL and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.(The minimum sample number requirements of Table 3.2 are not met.)
4. The requirements of Listing Policy section 3.10 to document baseline and trend conditions are not met in relation to the narrative water quality objective.
5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75698, Turbidity
Region 6     
Cheney Creek
 
LOE ID: 25866
 
Pollutant: Turbidity
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Two samples had turbidity values of 2.4 and 3.02 NTU. The MCL was not exceeded.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for turbidity is 5 NTU.
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Two samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 75698, Turbidity
Region 6     
Cheney Creek
 
LOE ID: 25865
 
Pollutant: Turbidity
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Two samples had turbidity values of 2.4 and 3.02 NTU.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Lahontan Basin Plan's regionwide turbidity objective states: "Waters shall be free of changes in turbidity that cause nuisance or adversely affect the water for beneficial uses. Increases in turbidity shall not exceed natural levels by more than 10 percent."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Two samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):
 
 
DECISION ID
75692
Region 6     
Cheney Creek
 
Pollutant: pH
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Regional Board Conclusion:

This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

One line of evidence is available in the administrative record to assess this pollutant. The water quality objective for pH is antidegradation-based and the available data are insufficient to document baseline and trend conditions as required by section 3.10 of the Listing Policy.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used do not satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy.
3. The two available samples cannot be used to document baseline and trend conditions under the requirements of Listing Policy section 3.10.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same.
 
 
Line of Evidence (LOE) for Decision ID 75692, pH
Region 6     
Cheney Creek
 
LOE ID: 25853
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The U.S. Bureau of Land Management sampled this station in June and August 2002. Two samples had pH values of 7.19 and 8.26 units.
Data Reference: Water quality data for surface waters on U.S Bureau of Land Management lands in Lassen and Modoc Counties
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Lahontan Basin Plan's objective for pH states: "In fresh waters with designated beneficial uses of COLD or WARM, changes in normal ambient pH levels shall not exceed 0.5 pH units. For all other waters of the region, the pH shall not be depressed below 6.5 nor raised above 8.5 units.

The Regional Board recognizes that some waters of the Region may have natural pH levels outside of the 6.5 to 8.5 range. Compliance with the pH objective for these waters will be determined on a case-by-case basis."
Objective/Criterion Reference: Water Quality Control Plan for the Lahontan Region (as amended)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One station was sampled.
Temporal Representation: Samples were taken on June 5 and August 9, 2002.
Environmental Conditions: Cheney Creek is a tributary of the Susan River, joining the river downstream of Willard Creek. In addition to the Cold Freshwater Habitat beneficial use, it is designated for the Spawning, Reproduction and Development use.
QAPP Information: No quality assurance information was submitted with the data.
QAPP Information Reference(s):