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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. <br /> FOR <br /> DEFENSE DEPOT TRACY <br /> TREATMENT PLANT <br /> SAN JOAQUIN COUNTY <br /> INFLUENT MONITORING <br /> Samples shall be collected at the same frequency and at approximately the same <br /> time as effluent samples and should be representative of the influent for the <br /> period sampled. The following shall constitute the influent monitoring program: <br /> Constituents Units Type of Sample Frequency <br /> BOD mg/l 24-hour Composite Weekly <br /> Suspended Solids mg/l 24-hour Composite Weekly <br /> Flow mgd Continuous Daily <br /> EPA Methods 601/602 ug/l Grab Weekly <br /> EFFLUENT MONITORING <br /> Samples shall be collected at the outlet of the treatment plant immediately prior <br /> to discharge into the percolation/evaporation ponds. <br /> Constituents Units Type of Sample Frequency <br /> Flow mgd Continuous Daily <br /> pH pH units Grab Daily <br /> BOD mg/l 24-hour Composite Weekly <br /> Suspended Solids mg/l 24-hour Composite Weekly <br /> Settleable Solids mg/1 Grab Daily <br /> Electrical umhos/cm 24-hour Composite Weekly <br /> Conductivity <br /> EPA Methods 601/602 ug/l Grab Weekly <br /> Total Coliform MPN/100 ml Grab Weekly <br /> Organisms <br /> EVAPORATION/PERCOLATION POND MONITORING <br /> Constituents Units Type of Sample Frequency Location <br /> Dissolved Oxygen mg/l Grab Daily Each Pond <br /> Pond Freeboard feet -- Weekly Each Pond <br />