| Water Body Name: | San Mateo Creek, Lower |
| Water Body ID: | CAR2044003320090202015405 |
| Water Body Type: | River & Stream |
Lines of Evidence (LOEs) for Decision ID 16181 |
| LOE ID: | 26765 |
| Pollutant: | Sediment Toxicity |
| LOE Subgroup: | Toxicity |
| Matrix: | Sediment |
| Fraction: | None |
| Beneficial Use: | Wildlife Habitat |
| Number of Samples: | 1 |
| Number of Exceedances: | 1 |
| Data and Information Type: | Toxicity testing of sediments |
| Data Used to Assess Water Quality: | Data used to evaluate sediment toxicity comprise one sediment sample collected by the SWAMP in 2003. The sample was toxic to Hyalella (survival was only 18% of control) in the bulk sediment toxicity test and chronic growth was also significantly affected (28.9% of control).
Comprehensive water quality assessment was conducted at seven monitoring sites in the San Mateo Creek watershed as part of SWAMP assessment. The aim of the monitoring was to determine patterns of water quality, protection of beneficial uses and potential impacts of land use and water management. Sampled parameters included physical and biological indicators, conventional water quality, water metals and toxicity as well as sediment metals and toxicity. SWAMP sediment sample was collected at the tidally influenced urban segment of San Mateo Creek. |
| Data Reference: | Water Quality Monitoring and Bioassessment in Four San Francisco Bay Region Watersheds in 2003-2004: Kirker Creek, Mt. Diablo Creek, Petaluma River, and San Mateo Creek. Surface Water Monitoring Program, San Francisco Bay Regional Water Quality Control Board, Oakland. CA |
| Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances that are lethal to or that produce other detrimental responses in aquatic organisms.
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. |
| Objective/Criterion Reference: | San Francisco Bay Basin (Region 2) Water Quality Control Plan (Basin Plan) |
| Evaluation Guideline: | Sediment toxicity data were evaluated according to the SWAMP methodology. Sample toxicity was determined by comparing mean organism response in samples and in negative controls. Statistical evaluation and a default threshold of 80% of the control value were used to establish whether the sediment exhibited significant toxicity adversely impacting aquatic organisms. |
| Guideline Reference: | Revised approach to toxicity test acceptability criteria using a statistical performance assessment. Environmental Toxicology and Chemistry, vol. 16, No. 6, pp 13221329 |
| Spatial Representation: | Data were collected at a sampling location at the lower part of San Mateo Creek within tidal reach. |
| Temporal Representation: | Sample was collected during spring season of 2003. |
| Environmental Conditions: | Data are representative of the lower watershed downstream from Mud Dam with the monitoring site located in the densely urbanized areas. |
| QAPP Information: | Data were collected and analyzed using procedures comparable with the SWAMP Quality Assurance Management Plan (SWRCB 2002). |
| QAPP Information Reference(s): | Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version) |
| | |
| LOE ID: | 26766 |
| Pollutant: | Sediment Toxicity |
| LOE Subgroup: | Toxicity |
| Matrix: | Sediment |
| Fraction: | None |
| Beneficial Use: | Wildlife Habitat |
| Number of Samples: | 4 |
| Number of Exceedances: | 4 |
| Data and Information Type: | Toxicity testing of sediments |
| Data Used to Assess Water Quality: | Data used to evaluate sediment toxicity comprise four sediment samples collected as part of a PRISM grant (Lowe et al., 2007) in 2004-2005. All samples were toxic to both freshwater and estuarine amphipods during sampling events and exhibited the lowest per cent survival and highest contaminant concentrations compared to other six tributaries studied. |
| Data Reference: | Final Project Report: Investigations of Sources and Effects of Pyrethroid Pesticides in Watersheds of the San Francisco Bay Estuary. Proposition 13 PRISM Grant # 041355520. SFEI Contribution #523. San Francisco Estuary Institute, Oakland, CA |
| Water Quality Monitoring and Bioassessment in Four San Francisco Bay Region Watersheds in 2003-2004: Kirker Creek, Mt. Diablo Creek, Petaluma River, and San Mateo Creek. Surface Water Monitoring Program, San Francisco Bay Regional Water Quality Control Board, Oakland. CA | |
| Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances that are lethal to or that produce other detrimental responses in aquatic organisms.
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. |
| Objective/Criterion Reference: | San Francisco Bay Basin (Region 2) Water Quality Control Plan (Basin Plan) |
| Evaluation Guideline: | Sediment toxicity data were evaluated according to the SWAMP methodology. Sample toxicity was determined by comparing mean organism response in samples and in negative controls. Statistical evaluation and a default threshold of 80% of the control value were used to establish whether the sediment exhibited significant toxicity adversely impacting aquatic organisms. |
| Guideline Reference: | Revised approach to toxicity test acceptability criteria using a statistical performance assessment. Environmental Toxicology and Chemistry, vol. 16, No. 6, pp 13221329 |
| Spatial Representation: | Data were collected at a sampling location at the lower part of San Mateo Creek within tidal reach (2 samples) and at the upper location that at the time of sampling represented the freshwater part of the watershed (2 samples). |
| Temporal Representation: | Samples were collected during winter season of 2004 and late spring of 2005. The winter sampling (November 2004) occurred after the first rain of the season to capture the potential effects of dry season pesticide use. The late spring sampling (April 2005) coincided with the presumption of increased pesticide application in urban and agricultural areas. |
| Environmental Conditions: | Data are representative of the lower watershed downstream from Mud Dam with the monitoring site located in the densely urbanized areas. |
| QAPP Information: | Data were collected and analyzed using procedures comparable with the SWAMP Quality Assurance Management Plan (SWRCB 2002). |
| QAPP Information Reference(s): | |