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, <br /> l� <br /> � ' � F`TANK CLOSUf�F.SI E S 3SME ENnRT <br /> Shdl Oil Company California <br /> 3725 Tracy Boulward,Tracy, <br /> Delta?miact No.50-69-012 <br /> i Page 2 <br /> Drilled four exploratory soil borings at the proposed location of the new underground <br /> storage tanks. Collected soil samples at 5400t intervals to a maximum depth of 15 feet <br /> (Figure 2). <br /> Drilled and installed three monitoring wells to a depth of 22 feet below grade. <br /> - . Screened recovered soil samples with a portable photoionization detector (PID) for total <br /> organic vapors. <br /> Submitted selected soil samples to a California-certified laboratory for analysis of TPH and <br /> benzene, toluene, ethylbenzene, and xylenes (BTEX), by U.S. Environmental Protection <br /> Agency (EPA)Method 8260. <br /> three monitoring wells on site and sent them to <br /> Collected ground water samples from the <br /> a California-certified laboratory for analyses of TPH and BTEX by EPA Method 624. <br /> 2 $ K 1Z D P R <br /> TLON <br /> I i tttn¢ <br /> The site is currently an operating Shell service station. The site is located ted at 3725 Tracy Boulevard <br /> V- <br /> in Tracy,San Joaquin County,California(Section 17,Township 2 South,Range 5 East MDB&M). <br /> L 's Office indicate that this is Parcel No.211-460-30,and <br /> Records of the San Joaquin County Assessor <br /> that the land is owned by Shell Oil Company(Shell). Shell's regional representative is Mr. Darrell <br /> 1 Robinson,Senior District Engineer,Pacific-Northwest District, Concord, California. <br /> The area surrounding the site is fiat and situated in a commercial and residential area. The site is <br /> located immediately north of Interstate 205 at the Tracy Boulevard exit. <br /> � I r <br /> The existing retail gasoline outlet was constructed in 1967. Figure: 2 illustrates the current existing <br /> f buildings and facilities at the site. The location of the three ex:s;ting underground storage tenks and <br /> t <br /> und storage tanks is shown in Figure 2. <br /> the proposed location for the four new undergro <br /> In 1967, two single-wailed steel underground storage tanks of 8,000- and 10,000-gallon capacity <br /> were installed when the station was constructed. A third 8,00€-gal ton steel undergroun storage_an <br /> removed and replaced with three 10,000-gallon, <br /> was added in 1970. In 1985,all three tanks were <br /> double-walled fiberglass tanks. Dispensing lines and vent lines were not replaced at that time and <br />