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Deka <br /> & ConsuRanis,Inc. <br /> Solving amronment-related business problems worldwide www.deltaenv.com <br /> 3164 Gold Camp Drive•Suite 200 <br /> Rancho Cordova, California 95670 USA <br /> 916.638.2085 800.477.7411 <br /> Fax 916.638.8385 DEC 6 21004 <br /> November 30,2004 ENVIRUTY;'' :- ,, ;c, LTH <br /> PERMIT-/SERVICES <br /> Mr.Harlin Knoll <br /> San Joaquin County Environmental Health Department <br /> 404 E Weber Avenue 3'd Floor <br /> Stockton,California 95202 <br /> Subject: Subsurface Soil and Ground Water Investigation Work Plan <br /> Restructure Petroleum Marketing Services of California <br /> 2537 Waterloo Road, Stockton,California <br /> Delta Project No:RPMS-0966-A <br /> Dear Mr.Knoll: <br /> Delta Environmental Consultants, Inc., (Delta) has been authorized by Restructure Petroleum Marketing <br /> Services of California, (RPMS) to further delineate the soil and ground water contamination at the above <br /> site. This Work Plan is for a soil and groundwater investigation to further determine the vertical and lateral <br /> extent of the groundwater contamination. Two offsite,down gradient monitoring wells will be installed and <br /> soil groundwater samples will be analyzed for petroleum hydrocarbon concentrations. <br /> Site Description <br /> The site is located on the northwest corner of Waterloo Road and Auto Avenue, (Figure 1). The service <br /> station is no longer operating. However, a retail convenience store currently occupies the site. Depth to <br /> groundwater recently measured at the site ranges from approximately 51 to 55 feet below surface grade <br /> (bsg). Groundwater flow direction generally ranges from north to northwest across the site. <br /> Proposed Scope of Work <br /> The proposed scope of work is to install two nested monitoring wells: MW-18 will be screened across the <br /> water table, and MW-18D will be screened across the lower water bearing unit that MW-7 is screened in <br /> (Figure 2).The purpose of the wells is to evaluate the extent of residual petroleum hydrocarbons, if any, in <br /> the soil and groundwater in a down gradient, off site location from the vicinity of the former underground <br /> gasoline storage tanks and fuel dispensers. All assessment activities will be performed under the direction <br /> of a California Registered Geologist. <br /> A member of. <br /> %k. At <br />