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r ' <br /> M <br /> Third Gyrler 7SH Dromrdwatw M•nllorI DOIN AMPod <br /> 2448 Wee i eWman Lam,Lodi.Calfterm <br /> GROUNDWATER SAMPLING AND ANALYSES <br /> Groundwater samples were collected from four of the wells. All samples were analyzed <br /> for concentrations of. <br /> • Total petroleum hydrocarbons, as gasoline, EPA Methods 503018015; <br /> • Benzene, toluene, ethylbenzene, and total xylenes by EPA Methods 50301602. <br /> Analytical results from March 1992 to date, are summarized in Table 2. Previous <br /> analytical results are included in Attachment 4.The laboratory report and chain-of-custody <br /> forms for the current event are included as Attachment 2. Benzene concentrations <br /> remain nondetect in wells MW-20, MW-34, and MW--36. Benzene concentrations for well <br /> MW-24 were 3.5 ppb and 2.2 ppb (Sequoia and WEST Labs, respectively). <br /> Aegis recommends a copy of this quarterly monitoring report be forwarded to the following <br /> parties: <br /> Mr. Harlan Knoll <br /> Environmental Health Division <br /> San Joaquin Public Health Services <br /> Post Office Box 2009 <br /> Stockton, California 95201 <br /> Mr. James B. Maughan <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> 92.7340.RPT 2 <br />