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STATE OF CALIFORNIA - Environmental Protection Agency PETE WILSON, Govemor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION "{ r ''I-Tt� ,� <br /> ft,Routrer Road, Suite A m _i <br /> mento, CA 95827.3098 <br /> NE (916) 255-3000 Cr' ' ­ 21 1 P.'- ? 3 8 <br /> FAX (916) 255-3015 <br /> 17 March 1994 <br /> Mr Robert Vasquez <br /> The Southland Corporation <br /> 5820 Stonendge Mall Rd , Ste 310 <br /> Pleasanton, CA 94588 <br /> RESULTS OF WELL SAMPLING, 7-ELEVEN, 9.110 THORNTON ROAD, STOCKTON, SAN <br /> JDAQUIN COUNTY <br /> Enclosed are copies of the analytical results of the samples collected by Board staff on 24 January <br /> 1994 Analysis by EPA Methods 601 and 602 were performed in-house at our laboratory The <br /> results for the sample from monitoring well MW 1 showed traces of chloroform and levels of BTEX <br /> in the low ppb range Gasoline constituents were detected in the sample from MW1, therefore, this <br /> sample was further tested for TPHg and lead by FGL Environmental Laboratory No lead was <br /> detected, however, 110 ppb TPH as gasoline was detected in the sample The results of the sample <br /> from the domestic well at 9156 Connie Ave showed traces of carbon tetrachlonde and chloro€orm <br /> The results of the sample from the domestic well at 9172 Thornton Rd showed a trace of carbon <br /> tetrachloride The other sampled wells, MW9, MW11, and MW14, did not contain detectable levels <br /> of contamination Note that MW11 is located on the property at 9135 Connie Ave Table 1 shows <br /> the contaminants and where they were detected <br /> Once we have received the results from the samples collected by your consultants, we will consult <br /> with San Joaquin County staff and review the status of your site If you have any questions, call me <br /> at (916) 255-3133 <br /> � <br /> ELIZ ETH A THAYER <br /> Associate Engineer <br /> cc Ms Mary Meays, San Joaquin County Environmental Health Division, Stockton <br /> Ms Sailaaa Yelamanchili, Groundwater Technology, Inc , West Sacramento <br />