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� `kg'"tea <br /> R„} <br /> FINAL REMETNATION PTAiv <br /> Shell Oil Company <br /> 620 Wcst Charter Way,Stockton,California <br /> Delta Project No.404&586 <br /> Page 3 <br /> 2.2 Site 13lsto_ry and Oaerntta " <br /> The original retail gasoline service station was constructed in 1971. Three underground gasoline storage <br /> tanks and a waste oil storage tank were installed at the time of site construction. Vapor recovery lines were <br /> installed on tae fuel dispensers in 1975,and new product distribution lines were installed in 1978. The <br /> original waste oil tank was removed in 1987 and replaced with a dual-wall waste oil tank. The site remain4d <br /> in operation through October 1989. During early November 1989,the site was demolished. The locations <br /> of the original tltorage tanks and pump i.;lands are illustrated in Figure 3. The underground storage tanks <br /> r� <br /> and associated product lines were removed during the week of November 13,1989. Three:now,12,000-gallon <br /> underground gasoline storage tanks were installed at the site during the week of November 27,1989. The <br /> new service station consists of gasoline sales, a convenience market, and a car wash. The station was <br /> completed in early 1990 and is currenlly in full operation(Figure 2). <br /> t.► <br /> Prior to completion of the new facility, appFav3matc E,I00`cublc ',s':of soil.containin roleurn j <br /> ceir Uh.wat,I ant. Q.tubic yair&of clen soils have bi=e7=v2t4.stoclmrlod,�sarnpl� add arsnspprtod:tt, +i <br /> the 7Fory aid,It► ,`'I fM facility in Stockton,f�aliforttla;for:dasj�►osal. <br /> ,.r <br /> i <br /> During this period of construction.Delta installed subsurface venting,product recovery,and water recovery <br /> lines to selected monitoring wells in order to facilitate future remedial activities. A fenced remedial <br /> equipment area,complete with electrical hookups,was also constructed. Figure 3 shows the subsurface line <br /> le <br /> network that was installed,as well as the locotion of the fenced remedial equipment area. This subsurface <br /> work was detailed in an April 13,1990,report,Interim Re►nedial Action Plan and Proposed Project Schedule. <br /> This report,including design calculations,is presented in Appendix A of this report. <br /> s <br /> l The subsurface lines currently in place at.the site are shorn in Figure 3, and allow for the following <br /> comb L-t tions of rt inedia tictmtic�"at each well: <br /> MW-2 Free product removal or ground water pumping combined with soil venting. <br /> MW-3 Soil venting. <br /> MW4 Soil venting. <br /> MW-5 Free product removal or ground water pumping combined with soil venting. <br /> it <br /> MW-7 Free product removal or ground water pumping combined with soil venting. <br /> MW-8 Free product removal or ground water pumping combined with soil venting. <br /> t MW-9 Free product removal or ground.+'ater pumping combined with soil venting. <br /> l.s <br />