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MONITORING AND REPORTING PROGRAM NO. 92-060 -4- SAN JOAQUIN SERVICE AREA 31 AMADOR CORPORATION CALIFORNIA STOP WASTEWATER FACILITY SAN JOAQUIN COUNTY SLUDGE MONITORING A composite sample of sludge shall be collected annually in accordance with EPA's POTW Sludge Sampling and Analysis Guidance Document, August 1989, and tested for the following metals: Cadmium Lead Chromium Nickel Copper Zinc Sampling records shall be retained for a minimum of five years. A log shall be kept of sludge quantities generated and of handling and disposal activities. The frequency of entries is discretionary; however, the log should be complete enough to serve as a basis for part of the annual report. WATER SUPPLY MONITORING A sampling station shall be established where a representative sample of the municipal water supply can be obtained. Water supply monitoring shall include at least the following: Sampling Constituents Units Frequency Standard Minerals mg/1 Annually Total Dissolved Solids mg/l Quarterly ' If the source water is from more than one well, the TDS shall be reported as a weighted average and include copies of supporting calculations. .1401:16(1110 Monitoring results shall be submitted to the Regional Board by the 20th day of the month following sample collection. Quarterly and annual monitoring results shall be submitted by the 20th day of the month following each calendar quarter and year, respectively. - In reporting the monitoring data, the Discharger shall arrange the data in tabular form so that the date, the constituents, and the concentrations are readily discernible. The data shall be summarized in such a manner to illustrate clearly whether the discharge complies with waste discharge requirements. The highest daily maximum for the month, monthly and weekly averages, and medians, and removal efficiencies (%) for BOD and Suspended Solids, should be determined and recorded.