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11 <br /> Wright <br /> Environmental <br /> Services,, Inc. Q� <br /> December 21,2004 707 East 11'b Street, Suite 120 �'� <br /> Project No. 9111 fit'. j Tracy,CA 95376 J <br /> Ace Tomato Co ,Inc <br /> 2771 East French Camp Road <br /> Mantica,California 95336 <br /> Attn Mr Dean Janssen <br /> Re: Preliminary Soil and Groundwater Site Assessment <br /> Site at 2771 East French Camp Road, Manpla, CA (SITE CODE 0001557) <br /> e <br /> Dear Mr Janssen, <br /> Wright Environmental Services,Inc. (Wright) has prepared this report for the above referenced site <br /> The proposed work is in response to a letter dated April. 14, 2004 from the San Joaquin County <br /> Environmental Health Department (SJC EHD) for additional subsurface site assessment Two <br /> underground petroleum fuel storage tanks currently occur on-site one 6,000-gallon Diesel and one <br /> 6,000-gallon Gasoline The dispeners occur at the end of the tanks <br /> • This subsurface work was performed to address locally elevated contaminants in soil on-site, <br /> specifically in the immediate vicinity of a gasoline pump dispenser fill bucket Since Methyl-Tert- <br /> Butyl Ether(MTBE) at 2,100 parts per billion (ppb) and Tert Butyl Alcohol (TBA) at 14,500 ppb <br /> were present SJC PHD desired additional subsurface soil and groundwater sampling m and around <br /> this location and subsurface tanks beyond that originally proposed in the immediate vicinity of the <br /> dispenser Discolored sod was observed and approximately 5 54 tons of soil was removed from <br /> around the fill dispenser. The soil was sent to Forward Landfill (see attachments), <br /> Technical Approach <br /> The technical approach to this project was to drill and sample four exploratory bonngs at the <br /> locations shown on Figure 1. A brief review of 1996 regional depth to groundwater maps prepared <br /> by the County of San Joaquin Planning Department (Flood Control and Water Conservation <br /> District)indicated groundwater occurred at depths of about 25 to 30 feet flowing westerly in the site <br /> area,borehole locations used this estimated flow direction to locate borings. Three bonnga were <br /> initially proposed and that was increased to four borings following SJC EHD comment <br /> One boring was placed as close as feasible to the underground tarok fill box and dispenser (where <br /> the contaminant leakage was observed) and up to four soil samples for vertical soil profiling <br /> adjacent to the dispenser and tanks selected on the basis of field evidence of contaminant presence <br /> One groundwater sample was collected from this boring. The three more distant borings collected <br /> soil samples near the capillary fringe and one groundwater sample for chemical analysis from <br /> surmised downgradient flow directions to search for contaminants <br /> Page l of 6 <br />