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V . <br /> ' RECEIVED <br /> T Mdbll Oil-Corporation DEL U,M AVENUE,SUITE 700 <br /> ENVIRANW, R TZRr ffr' <br /> November 30, 1992 PERMIT/SERVICES' <br /> Ms. Mary Meays FORMER-MOBIL BULR.:P1A T <br /> San Joaquin County 500. EAST' GRANTLINE ROAD <br /> Environmental- Health Division TRACY, CALIFORNIA <br /> 1601 East Hazelton Ave. <br /> Stockton, CA 95201 <br /> Dear Ms._. Meays: . <br /> Enclosed for your information-is the quarterly monitoring <br /> and sampling report dated November 22, 1992 for subject <br /> location.- The average depth to ground water was 10.97 feet, <br /> with hydraulic gradient of 0. 01 foot per foot. The ground <br /> watergradient diarection and magnitude have remained <br /> relatively consistently to the northeast. <br /> ISI <br /> TPHG and BTEX were not detected in any of the wells except <br /> TPHG in7AW-3 (65 .ppb) and benzene in AW-9 (1:2 ppb) . TPHD <br /> was present in AW-3 and -AW=5 (880 and 96 ppb.) . The presence. <br /> of. TPHD in AW-5 is inconsistent with past data and appears <br /> anomalous. <br /> I If you have any questions, Please feel free to call me at <br /> (818) -953-2626. <br /> sincerely, <br /> Stephen Pao <br /> Field Engineer II <br /> enclosure <br /> cc: Ms.. Elizabeth Thayer (w/ enclosure) <br /> f RWQCB- ' Central Valley Region <br /> 3443 Routi.6r Road <br /> Sacramento, CA 95827 <br /> Mr. Greg-Schubert (w/ enclosure) <br /> Mark III Engineering Contractors <br /> 5.1.01 Florin --Perkins Road <br /> C <br /> Sacramento, CA 95826 <br />