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MONITORING AND REPORTING PROGRAM _3_ <br /> CITY OF TRACY <br /> WASTEWATER TREATMENT PLANT <br /> SAN JOAQUIN COUNTY <br /> Species: Pimephales promelas, Ceriodaphnia dubia, Selenastrum capricornutum <br /> Frequency: Once per quarter, four quarters per year <br /> The Discharger shall conduct quarterly chronic toxicity testing using 100 percent effluent and 2 <br /> controls. If toxicity is found in any of the 100 percent test,the Discharger must immediately retest <br /> using the full sampling protocol of 5 dilutions listed below. <br /> If no toxicity is found in any of the 100% effluent tests, the Discharger may discontinue the <br /> sampling after the first four quarters of tests. The Discharger must reinstate testing 18 months prior <br /> to the permit expiration date and conduct tests for 1 year. <br /> Dilution Series: <br /> Dilutions (%) Controls <br /> Old River Lab <br /> 100 25 55-00 1_0 0_5 Water Water . <br /> % WWTP Effluent 100 25 5 1.0 0.5 0 0 <br /> % Dilution Water* 0 75 95 99 99.5 100 0 <br /> % Lab Water 0 0 0 0 0 0 100 <br /> HOLDING POND MONITORLN <br /> Constituents Unita Tvpe of Sample Frequency LocatiQn <br /> Dissolved Oxygen mg/l Grab Daily Each Pond <br /> Total Dissolved Solids mg/l Grab Quarterly Each Pond <br /> Electrical Conductivitiy pmhos/cm Grab Quarterly Each Pond <br /> SLUDGE,MONI + <br /> A composite sample of sludge shall be collected annually in accordance with EPA's POTW Sludge <br /> Sampling and Analysis Guidance Document, August 1989, and tested for the following metals: <br /> Arsenic Copper Molybdenum Zinc <br /> Cadmium Lead Nickel <br /> Chromium Mercury Selenium <br /> Analytical shall include both total and soluble metals concentrations. -Soluble metal concentrations <br /> shall be determined after a Title 22 Waste Extraction Test(WET) has been performed. Total <br /> concentrations results shall be reported as mg/kg dry weight. Soluble results will be reported in <br /> terms of mg/l. Sampling records shall be retained for a minimum of five years. A log shall be kept <br /> of sludge quantities generated and handling and disposal activities. The frequency of entries is <br /> discretionary; however, the log should be complete enough to serve as a basis of the annual report. <br /> WATER SUPP11 MONITORING <br /> A sampling station shall be established where a representative sample of the municipal water supply <br /> can be obtained. The following shall constitute the water supply monitoring program: <br />