Draft California 2020 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 5 - Central Valley Region

Water Body Name: Walker Slough (partly in Delta Waterways, eastern portion)
Water Body ID: CAR5314000020020111134652
Water Body Type: River & Stream
 
DECISION ID
73368
Region 5     
Walker Slough (partly in Delta Waterways, eastern portion)
 
Pollutant: Indicator Bacteria
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)(2016)
Revision Status Original
Sources: A Source Unknown
TMDL Name: Stockton Area Sloughs and Rivers - Pathogens
TMDL Project Code: 721
Date TMDL Approved by USEPA: 05/13/2008
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. The Stockton Urban Waterways pathogen TMDL has been approved by the Central Valley Regional Water Quality Control Board in 2008 and approved by USEPA on 13 May 2008.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be listed as exceeding standards but being addressed by a USEPA approved TMDL.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 73368, Indicator Bacteria
Region 5     
Walker Slough (partly in Delta Waterways, eastern portion)
 
LOE ID: 4575
 
Pollutant: Pathogens
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Water Contact Recreation
 
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 pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):