Task 1: Conduct Annual Data Assessment and Reporting Specific annual assessments and reports that are required by the current MS4 Permit to be submitted to the Regional Water Quality Control Board (RWQCB) are listed below. Example past reports can be found at https://projectcleanwater.org. Work will include conducting watershed-based analysis for each monitoring program component, including (per current MS4 Permit Provision D.4 requirements, and similar sections of a future MS4 permit): 1) Identification and prioritization of water quality problems. 2) Watershed water quality characterization and potential source analysis. 3) Load/Concentration Analyses at Receiving Waters Long Term Monitoring Stations (LTMS). 4) Statistical evaluation of loads/concentrations at LTMS to land use, population, and sources. 5) Source activity linkage to water quality impacts. 6) Preparation of results and discussion of toxicity identification evaluations (TIEs). Identification of areas that may require TIEs based on analysis of chemical and toxicity data at the LTMS may be needed. 7) Identification of recommended future monitoring to identify and address sources of water quality problems or if sources are known, recommend actions to decrease pollutant discharges. Evaluate monitoring data in accordance with MS4 Permit requirements. In general, the data will be assessed to include, but not limited to: 1) Measure and improve effectiveness of monitoring programs. 2) Determine the chemical, physical, and biological impacts based on a “weight of evidence approach” in evaluating storm water effects. This includes creek health as measured by biological community diversity (bioassessment monitoring), as well as storm water quality measured at LTMS for chemical, physical and bacteriological contaminant levels (chemistry and microbiology tests) and toxic effects to organisms (toxicity testing). 3) Characterize urban runoff discharges by calculating estimated wet and dry weather pollutant loads. 4) Conduct source identification and other special studies as requested by the County Project Manager (PM) to identify sources of pollutants. 5) Prioritize drainage and sub-drainage areas that need management actions by identifying potential areas of concern based upon exceedances of water quality objectives, toxic effects, or community degradation in hydrologic units. 6) Assess the overall health of receiving waters using information from all components of the receiving water monitoring program, including data collected from LTMS, Bight ‘13 Monitoring Program, Stormwater Monitoring Coalition (SMC) Bioassessment monitoring, data from special studies and/or other applicable data sets (as approved by the County). 7) Use historical data and data collected outside of the MS4 Permit monitoring program (as approved by the County) to assist in the assessment of watersheds as applicable and available. 8) Identify and analyze long-term trends in storm water or receiving water quality using appropriate nonparametric methods. 9) Calculate annual pollutant loads (wet and dry weather) due to urban runoff. 10) Assess all monitoring program components listed above for compliance with relevant numeric goals and priorities as applicable. 11) Describe monitoring station locations by latitude, and longitude, and frequency of sampling. 12) Prepare maps and GIS layers of station locations, drainage areas, land uses, WMA boundaries, jurisdictional boundaries, results of monitoring and assessments, and other components needed to present and report the results of data analysis and assessments geo-specially.
