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CAMBRIA <br /> September 19, 1997 <br /> Mr. Ron Rowe <br /> San Joaquin County Public Health Services rA ED <br /> Environmental Health Division R F0f rI ,I <br /> 304 East Weber Ave., 3rd Floor "' <br /> Stockton, California 95201-0388 SEP 19 1997 <br /> Re: Hoist Sampling Work Plan ENVIRONMENTAL HEALTH <br /> Shell Service Station PERMIT/ SERVICES <br /> 1071 North Main Street <br /> .Manteca,California <br /> WIC#204-4728-0502 <br /> Cambria#24-323-11 <br /> Dear Mr. Rowe: <br /> As discussed during your September 16, 1997 telephone conversation with Scott MacLeod,Cambria <br /> Environmental Technology,Inc. (Cambria)is submitting this work plan on behalf of Shell Oil Products <br /> Company (Shell) for hoist replacement sampling at the site referenced above. Also included is the <br /> agreement with the property owner which allows Shell access to the property and the Master File <br /> Record Information(MFRI)form. Our proposed scope of work for this sampling is described below. <br /> SITE HISTORY <br /> Site Description: The site is an active Shell service station located at the intersection of North Main <br /> Street and Louise Avenue in Manteca, California. The site is located in a topographically flat, <br /> commercial area,, <br /> CAMBRIA <br /> Previous Work: Cambria collected soil samples during tank and product line removal activities in <br /> ENVIRONMENTAL August 1996. The highest concentration of hydrocarbons from the underground storage tank(UST) <br /> complex was from the east end of tank 4 (1,300 ppm TPHg). This area was subsequently over- <br /> TECHNOLOGY,INC. excavated to a depth of 25 feet,which was the maximum depth possible with the available excavation <br /> 1144 65TH STREET, equipment. Soil samples from the bottom of the over-excavation contained only 3.4 ppm TPHg. The <br /> only TPHg detected in the soil near the dispensers was from the western dispenser of the eastern <br /> SUITE B canopy, with a concentration of 1,200 ppm TPHg. The only TPHg detected in soil from beneath the <br /> OAKLAND, product lines was located where the product lines entered the tank complex, at a concentration of <br /> 3.1 ppm TPHg. <br /> CA 94608 <br /> PH:(510)420-0700 <br /> FAX:(510)420-9170 <br />