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MONITORING AND REPORTING PROGRAM -2- <br /> CITY OF STOCKTON <br /> AUSTIN ROAD LANDFILL <br /> GROUND WATER TREATMENT SYSTEM AND STORMWATER DISCHARGE <br /> SAN JOAQUIN COUNTY <br /> Sampling <br /> Constituents Units Type of Sample Frequency <br /> EPA Method 602 /ig/l Grab Monthly' <br /> ICAP (Metals Scan) mg/l 24 hr. Composite Annually <br /> 1) Analyses shall be conducted weekly for four consecutive weeks following <br /> initial discharge to Littlejohns Creek. 2) If any sample shows detectable <br /> volatile organics, the Discharger shall immediately resample and reanalyze <br /> the effluent for the detected constituent(s) , and shall continue sampling the <br /> effluent on a weekly basis until the constituent(s) concentrations are below <br /> detection. <br /> THREE SPECIES EFFLUENT TOXICITY MONITORING <br /> Effluent toxicity monitoring shall be conducted to determine if the effluent is <br /> contributing toxicity to Littlejohns Creek. The monitoring should be conducted <br /> as specified in the EPA Guidance Manual EPA 600/4-89/001. Effluent toxicity <br /> samples shall be collected at the discharge from the holding tank prior to be <br /> discharged into Littlejohns Creek. Twenty-four hour composite samples shall be <br /> representative of the volume and quality of the discharge. Time of collection <br /> of samples shall be recorded. Effluent toxicity monitoring shall include the <br /> following: <br /> Species: Fathead Minnow, Ceriodaphnia, and Algal <br /> Frequency: Bimonthly - every two months <br /> Dilution Series: <br /> Dilutions (%) Controls <br /> Canal Lab <br /> 100 75 50 25 12.5 Water Water <br /> % GWTP Effluent 100 75 50 25 12.5 0 0 <br /> % Dilution Water' 0 25 50 75 87.5 100 0 <br /> % Lab Water 0 0 0 0 0 0 100 <br /> * - Dilution water shall be non-toxic receiving water (Littlejohns Creek) taken <br /> upgradient from the discharge point. <br />