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I <br /> 1y <br /> i + <br /> Environmental <br /> /� Delta <br /> //1® Consultants,Inc. <br /> 3330 Data Drive.Suite 100 <br /> 1 Rancho Cordova,CA 95670 <br /> { 916163E-2065 <br /> FAX:916/630.8385 <br /> F� <br /> �L <br /> r April 13, 1454 <br /> t Ms.Diane Hinson <br /> San Joaquin County Local Health District <br /> 1601 Hazelton Avenue <br /> Stockton, California 95201 <br /> Subject: Interim Remedial Action Plan and Proposed Project Schedule <br /> Shell Service Station <br /> 620 West Charter Way, Stockton, California <br /> Delta Project No.40-8S-586 <br /> Dear Ms.Hinson: <br /> 1 Delta Environmental Consultants, Inc. (Delta), was authorized by Shell Oil Company (Shell) to <br /> conduct an assessment of soil and ground water conditions at the Shell service station located at 620 <br /> West Charter Way, Stockton, California. The investigation was initiated because the entire station <br /> f°l facility and associated underground storage tanks and product lines were being replaced. <br /> r <br /> Petroleum constituents wen identified in soils and ground water at the site resulting from two source <br /> E locations.Petroleum products have been identified in soils beneath the former pump islands and also <br /> beneath the forme.*underground storage tanks. Free product has been identified floating nn the water <br /> table beneath the former underground storage tanks; however, no free product has been detected <br /> t beneath the former pump islands. Dissolved hydrocarbons have been detected in 7 of the 9 <br /> monitoring wells at the site. Based on this information,remedial action will be required at this site <br /> to obtain closure of the soils and ground water underlying.the project site. <br /> to To facilitate remediation in conjunction with construction of the new station,a pipe manifold system <br /> was designed and instailed to connect all monitoring wells •xith detectable levels of dissolved <br /> hydrocarbons through an underground piping system to a remedial equipment area located at the <br /> ra southeast comer of the site before the site was resurfaced with new concrete. <br /> I : <br /> �s Frachcal Solutions to Environmental Concerns <br />