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Apr-27-98 04: 21P GHH Engineering Inc P -O2 <br /> W ENGINEERING, INC. <br /> ftiEft'7ai t Lm h537701 <br /> December 28, 1997 <br /> Mr. Srikanth Dasappa <br /> USA Gasoline Corporation <br /> 30101 Agoura Court, Suite 200 <br /> Agoura Hills.California 91301 <br /> SUBJECT: EXCAVATION AND PRODUCT LINE. SOIL. SAMPLING <br /> USA STATION#110 <br /> 2132 EAST MARIPOSA ROAD <br /> STOCKTON,CALIFORNIA <br /> Dear Mr. Dasappa: <br /> This letter presents the soil sampling analytical results associated with die November, 1997 <br /> underground storage tank (UST) and fuel distribution line replacement activities at the subject <br /> site, as shown on Figures I and 2_ <br /> Sampling Activities <br /> On November 17, 1997,three 12,000-gallon unleaded, premium and regular gasoline UST's and <br /> one 3,000-gallon diesel UST were removed by USA Gasoline Corporation (USA). Excavation <br /> soil sample locations and depths are shown on Figure 3. <br /> The excavation consisted of the removal of four USTs and associated product lines on November <br /> 17,through 24, 1997. A GI'IH representative collected soil samples from the product line <br /> trenches and the area exposed during the UST removals. Soil samples collected from the product <br /> lines were collected at the depths and locations shown on Figure 3. The samples were collected <br /> at locations requested by Ms. Leusha Briggs with San Joaquin County Public Health Service.. A <br /> total of six soil samples were collected alone the product line (P-1 through P-6) and seven soil <br /> samples were collected from below die dispenser plumbing (D-1 through D-7). <br /> Approximately 400 cubic yards of soil were excavated during the removal of the UST's. The <br /> excavated soif was placed on visquene for classification,prior to disfx,sal. The stockpiled soil <br /> was covered with visquene following, the completion of excavation activities. The excavated soil <br /> was disposed of by USA at Forward Landfill between November 17, anti 24, 1997. <br /> Twelve sail samples were collected from the UST excavation spoils pile on November 17, 1997 <br /> and composited into three samples. The samples were analyzed to decide an appropriate soil <br /> disposition. <br /> 8084 Old Auhiun Road,Suite L,Cures Heights.CA 95610 (1)16)723-7645 000)S77-1739 tax(916)723-7698 <br />