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STATE OF CALIFORNIA—HEALTH AND WELFARE AGENCY GEORGE DEUKMEJIAN, Governor <br /> DEPARTMENT OF HEALTH SERVICES <br /> TOXIC SUBSTANCES CONTROL DIVISION <br /> NORTHERN CALIFORNIA SECTION <br /> 4250 POWER INN ROAD <br /> SACRAMENTO,CA 95826 <br /> (916)739-3145 <br /> May 3, 1984 <br /> Mr. Alvan Norris <br /> Office of the District Attorney <br /> County of San Joaquin <br /> P.O. Box 50 <br /> Stockton, CA 95202 <br /> Dear Mr. Norris: <br /> SUMMARY INFORMATION CONCERNING MARLEY COOLING TOWER COMPANY, STOCKTON, <br /> SAN JOAQUIN COUNTY, EPA NO. CAD 009140120 <br /> Enclosed are two summary tables of sample analytical results, maps showing <br /> where the samples were collected, and a Statement of Facts, as per the <br /> Department's agreement with your office. <br /> The following are the National Interim Primary Drinking Water Standards (DWS), <br /> the Secondary Drinking Water Standards (SDWS) , the Total Threshold�Limiting <br /> Concentrations (TTLC), and the Soluble Threshold Limiting Concentrations (STLC) <br /> for the compounds of concern at the Marley facility: <br /> (mg/l in <br /> TTLC (mg/kg) . STLC extract) DWS (mg/1) SDWS (mg/1) <br /> P.tivsenv 51W . 05�Arsenic 500 5.0 0.05 <br /> lam"^ Sd� c) —Chromium 2,500 560 0.05 <br /> Hexavalent 500 5 <br /> Chromium <br /> SeCc✓Id�"a S1011,p'Copper 2,500 25 <br /> The DWS and SDWS values should be used in evaluation of all groundwater samples <br /> and surface water samples which could impact drinking water supplies. The TTLC <br /> and STLC values should be used in evaluation of all soil samples, and any water <br /> samples which do not impact drinking water supplies. <br /> Ti,Y - 1984 <br /> SFAI in"n(i;N Inf'AL <br /> HEALTH DISTRICT <br />