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samples <br /> revealed in the collected samples of soil or groundwater d Analytical hese results of soil Works <br /> collected from ASB-1 were wholly nondetectable Base <br /> concluded that waste-oil contamination did not appear to spread laterally beneath the on-site <br /> building <br /> On December 15, 1989, loll was overexcavated from the western wall near the former concentration of 30 6 ppm at 6 feed <br />' UST area Laboratory analytical results revealed a TPH d <br /> TPH-d was not detected in samples collected at depths of 2 feet or 16 feet <br /> Ground-water samples collected from MW-1 in February of 1990 indicated a TPH-d <br /> concentration of 350 ppm A TPH-d concentration of 59 ppm was detected in a sample collected <br />' two months later in April of 1990 <br /> On September 27, 1993, Roger Foote Associates (RFA) oWtarm Sacramento wels W12 and MW-3lled three 1 <br /> borings, two of which were converted to ground water g <br /> Soil boring ASB-2 was drilled at an angle of about Owells wereal and was co completed to extended total depth <br /> to an <br /> equivalent vertical depth of 33 5 feet Both monitoring <br /> of 50 feet <br /> Selected soil samples were analyzed for TPH-d, TPH-g, and BTEX constituents by California <br /> d analytical laboratory <br /> Laboratory Services of Rancho Cordova,' les <br /> aState-cer351& 40 feet, and MW-3 C 351& 40 f eet ed from ASB-2 Q 6 & 19 feet, MW-2 Q 15, <br /> collect <br /> below surface grade (bsg) were found nondetectable for all constituents Ground water was <br /> encountered at an average depth of 45 feet bsg <br /> W W Irwin, Inc of Merced was awarded the contract to perform ground-water monitoring by <br /> ' Ms Carmen Punla in January of 1995 Monitoringl m County Divh MW-3 were ision s on of Environmental <br /> on February 6, 1995 Mr Harlin Knoll of the San Joaquin <br /> Health attended the monitoring activities No detectable petroleum hydrocarbons were revealed <br /> ' in samples collected from the three wells <br /> GROUND-WATER MONITORING <br /> on <br /> y 9, 1995 <br /> Ground-water monitoring for the second quarter' was <br /> performed determined that the ave age,Keck® interface probe, the W W Irwin, Inc geologist <br /> piezometric depth-to-water underlying the site was 32 25 feet bsg <br /> ' WW 6wm Inc <br /> Pro)ea No 33236 00 3 <br /> May 1995 <br />