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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. 94- <br /> FOR <br /> DEFENSE LOGISTICS AGENCY, <br /> DEFENSE DISTRIBUTION REGION WEST, TRACY <br /> INTERIM GROUND WATER CLEANUP SYSTEM <br /> SAN JOAQUIN COUNTY <br /> Specific sample locations shall be established under the direction of the Board's staff, with <br /> concurrence by Defense Distribution Region West, Tracy (DDRW Tracy). A description of the <br /> sample locations shall be attached to this Order. <br /> Monitoring of start-up phases for the new air stripping tower and any new disposal areas or <br /> injection wells will be done in conformance with an approved start up operations proposal to be <br /> submitted by DDRW Tracy at least four weeks prior to start up. <br /> AIR STRIPPER MONITORING <br /> The air stripper monitoring shall consist of sampling both the influent and effluent flows <br /> according to the following schedule. Influent samples shall be collected from the inlet sampling <br /> port of each air stripper. Effluent samples shall be collected from the sampling port at the base <br /> of the air stripper tower. Time and date of sample collection shall be recorded. <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Volatile Organics' µg/1 Grab Weekly <br /> Specific Conductivity µmhos/cm Grab Weekly <br /> PH pH Units Grab Weekly <br /> Temperature °F/"C Grab Weekly <br /> Total Petroleum HCs1 mg/l Grab Weekly <br /> Pesticides' µg/1 Grab Quarterly <br /> Metals' µg/l Grab Annually <br /> Arsenic' µg/1 Grab Annually <br /> Chromium (total) µg/1 Grab Annually <br /> Mercury' µg/1 Grab Annually <br /> Selenium' µg/1 Grab Annually <br />