Final California 2010 Integrated Report( 303(d) List/305(b) Report)

Supporting Information

Regional Board 1 - North Coast Region

Water Body Name: Bodega HU, Estero de San Antonio HA, Stemple Creek/Estero de San Antonio
Water Body ID: CAR1154001219990602120940
Water Body Type: River & Stream
 
DECISION ID
6595
Region 1     
Bodega HU, Estero de San Antonio HA, Stemple Creek/Estero de San Antonio
 
Pollutant: Nutrients
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: Delist from 303(d) list (being addressed by USEPA approved TMDL)(2006)
Revision Status Original
Sources: Source Unknown
TMDL Name: Stemple Creek/Estero de San Antonio
TMDL Project Code: 514
Date TMDL Approved by USEPA: 12/11/1997
Impairment from Pollutant or Pollution: Pollutant
 
Conclusion: This pollutant is being considered for listing under Section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.

The Stemple Creek/Estero de San Antonio Nutrient TMDL has been approved by the RWQCB in 1997 and subsequently approved by the USEPA.

Based on the readily available information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the Section 303(d) list.
 
RWQCB Board Staff Decision: No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed.
 
SWRCB Board Staff Decision: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
USEPA Action (if applicable):
 
 
Line of Evidence (LOE) for Decision ID 6595, Nutrients
Region 1     
Bodega HU, Estero de San Antonio HA, Stemple Creek/Estero de San Antonio
 
LOE ID: 1764
 
Pollutant: Nutrients
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
 
DECISION ID
6596
Region 1     
Bodega HU, Estero de San Antonio HA, Stemple Creek/Estero de San Antonio
 
Pollutant: Sediment
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2006)
Revision Status Original
Sources: Agriculture | Erosion/Siltation | Grazing-Related Sources | Land Development | Nonpoint Source
TMDL Name: Stemple Creek/Estero de San Antonio
TMDL Project Code: 514
Date TMDL Approved by USEPA: 01/01/1997
Impairment from Pollutant or Pollution: Pollutant
 
Conclusion: This pollutant is being considered for listing under Section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.

The Stemple Creek/Estero de San Antonio Nutrient TMDL has been approved by the RWQCB in 1997 and subsequently approved by the USEPA.

Based on the readily available information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the Section 303(d) list.
 
RWQCB Board Staff Decision: No new data were assessed for 2008. The decision has not changed.
 
SWRCB Board Staff Decision: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
USEPA Action (if applicable):
 
 
Line of Evidence (LOE) for Decision ID 6596, Sediment
Region 1     
Bodega HU, Estero de San Antonio HA, Stemple Creek/Estero de San Antonio
 
LOE ID: 1765
 
Pollutant: Sediment
LOE Subgroup: Pollutant-Sediment
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified?This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):