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T • r <br /> • <br /> en vrros® <br /> April 26, 1996 <br /> Mr. R. Jeff Granberry <br /> Shell Oil Products Company <br /> P 0 Box 4023 <br /> Concord, California 94524 <br /> RE: Quarterly Monitoring Report - First Quarter 1996 <br /> Shell Service Station <br /> 6131 Pacific Avenue <br /> Stockton, California <br /> WIC #204-7525-0104 <br /> Dear Mr Granberry <br /> This Quarterly Monitoring Report describes the recently completed activities associated <br /> with ground water monitoring and sampling at the referenced site (Plates 1 and 2) This <br /> report was prepared to meet quarterly reporting requirements issued by the Regional Water <br /> Quality Control Board, Central Valley Region and San Joaquin County Public Health <br /> Services <br /> iQuarterly Monitoring & Sampling Summary <br /> Ground water monitoring and sampling for the first quarter of 1996 are summarized below <br /> C Blaine Tech Services, Inc (Blaine) measured ground water levels and collected <br /> samples from Wells MW-1 through MW-3 on February 28, 1996 Samples were <br /> transported to National Environmental Testing, Inc (NET) in Santa Rosa, <br /> California for chemical analysis <br /> • Enviros, Inc (Enviros) evaluated water-level measurement data and prepared a <br /> ground water elevation/benzene concentration map (Plate 2) <br /> • Ground water samples collected from Well MW-lwereND for TPPH and BTEX <br /> compounds Well MW-2 contained 80 ppb TPPH and 10 ppb benzene Well <br /> • MW-3 contained 100,000 ppb TPPH and 11,000 ppb benzene A ground water <br /> elevation/benzene concentration map is presented on Plate 2 <br /> r <br /> I <br /> Enviros, Inc 270 Perkins Street Sonoma Calttornia Tel 707/935 4850 <br /> p 0 Box 259 95476 0259 Fax 7071935 6649 <br />