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CAMBRIA <br /> October 17, 1997 <br /> Mr Ronald Rowe 00 <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, California 95201-0388 <br /> Re Hoist Replacement Sampling Report <br /> Shell Service Station <br /> 1071 North Main Street <br /> Manteca, California <br /> WIC#204-4728-0502 <br /> Cambria#240-323-9 <br /> Dear Mr Rowe <br /> On behalf of Shell Oil Products Company(Shell),Cambria Environmental Technology,Inc (Cambria) <br /> is submitting this report presenting the results of the September 1997 soil sampling at the site referenced <br /> above The sampling was conducted during the replacement of three hydraulic hoists Presented below <br /> are the site history, scope of work,and analytic results <br /> SITE HISTORY <br /> Sate Descnptwn: 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 vicinity is a topographically flat, <br /> predominantly commercial area <br /> Tank Removal. Cambria collected soil samples during underground storage tank (UST) removal <br /> CAMEKA activities in August 1996 The highest concentration of hydrocarbons from the UST complex was <br /> ENviroNMENrAL 1,300 parts per million (pprn) total petroleum hydrocarbons as gasoline (TPHg) This area was <br /> subsequently over-excavated to a depth of 25 ft, which was the maximum depth possible with the <br /> TECHNOLOGY,INC. available excavation equipment Soil samples from the bottom of the over-excavation contained only <br /> 1144 65TH SmE7, 3 4 ppm TPHg The only TPHg detected in the soil near the dispensers was from the western dispenser <br /> of the eastern canopy, with a concentration of 1,200 ppm TPHg <br /> Sum S <br /> OAKLAND, Product Pape Removal: Product piping was also removed from the site in August 1996 The only <br /> TPHg detected in soil from beneath the product lines was located where the product lines entered the <br /> CA 94608 tank complex,at a concentration of 3 1 ppm TPHg <br /> N(510)420-0700 <br /> (3-10)4209170 <br />