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

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name: Matilija Reservoir
Water Body ID: CAL4022001219990202160007
Water Body Type: Lake & Reservoir
 
DECISION ID
69281
Region 4     
Matilija Reservoir
 
Pollutant: Fish Barriers (Fish Passage)
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Sources: A Source Unknown
Expected TMDL Completion Date: 2019
Impairment from Pollutant or Pollution: Pollution
 
Regional Board Conclusion: 303(d) listing decisions made prior to 2006 were not held in an assessment database. The original Listing was flawed because fish barriers is not a pollutant but rather could fall under the definition of pollution. Because the original basis for the decision cannot be determined and no new information has become available this is being removed from the CWA section 303(d) List and placed into Category 4c until more data and information can be collected and assessed.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the impairment is due to a non-pollutant or pollution. This impairment therefore falls under Integrated Report Category 4c.
 
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 69281, Fish Barriers (Fish Passage)
Region 4     
Matilija Reservoir
 
LOE ID: 4338
 
Pollutant: Fish Barriers (Fish Passage)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Warm 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 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):