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Chemn <br /> Chevron U.S.A. Products Company <br /> 2410 Camino Ramon, San Ramon, California • Phone (510) 842-9500 <br /> Mad Address PC Box 5004 San Ramon CA 94583 0804 <br /> April 30, 1993 <br /> Mr Harlin Knollj 1f <br /> ��Y � � ���� <br /> San Joaquin County Public Health Services <br /> Environmental Health Division ENVIRONMENTAL HEALTH <br /> 445 North San Joaquin Street PERMIT/50VICES <br /> P 0 Box 2009 <br /> Stockton, CA 95201 <br /> Re Chevron Service Station No 9-0959 <br /> 103 W Eleventh Str,, Tracy, California <br /> Dear Mr Knoll <br /> Enclosed is the quarterly momtonng and sampling report from Sierra Environmental Services dated <br /> Apn123, 1993 <br /> Bnefly, the results show nondetectable levels of total petroleum hydrocarbon as gasoline (TPH-G), <br /> benzene, toluene, ethylbenzene, and xylenes (BTEX) to well MW-3 TPH-G and BTEX was <br /> detected in well MW-1 The concentrations were 1300 ppb TPH-G, 2 ppb benzene, S ppb toluene, <br /> 3 ppb ethylbenzene, and 19 ppb xylenes TPH-G at 750 ppb, toluene at 3 ppb, ethylbenzene at 3 <br /> ppb, and xylenes at 4 ppb were detected to MW-2 Depth to water during this sampling period <br /> ranged from 9 11 to 10 27 feet <br /> Chevron will continue to monitor the site on a quarterly basis and report those results to your <br /> office <br /> If you have any questions or comments, please feel free to contact me at(510) 842-8752 <br /> Sincerely, <br /> Chevron U S A Products Co <br /> Kenneth Kan <br /> Engineer <br /> LKAN/MacFtle 9-095985 <br /> Enclosure <br /> cc Mr Gordon Boggs, RWQCB-Central Valley Region <br /> 3443 Routter Road, Suite A, Sacramento, CA 95827-3098 <br /> Mr Mike Purcell, Chevron U S A Products Co <br />