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i i and total xylenes were present in a groundwater sample a acquired from monitoring well MW-2 . . . one of three on-site groundwater monitoring wells . The analytical results reported by AES appear in Table 2 . Detectable concentrations of fuel hydrocarbons were also present in soil samples acquired during the installation of monitoring wells MW-1 and MW-3 during July, 1991 , and in other soil samples acquired from the area formerly occupied by the underground gasoline storage tanks during July, 1989 and July, 1990 . I Four soil borings were also advanced during during July of 1991 . Soil samples acquired from these borings contained significant levels of fuel hydrocarbons (including 5 , 100 parts per million {ppm} Total Petroleum Hydrocarbons as Gasoline {TPH-G) and 2 , 000 parts per billion {ppb} benzene in SB1 at 9 feet , and 220 ppm TPH-G in SB2) . With the approval of Ms . Mary Meays, Senior PHS/EHD Environmental Health Specialist , EPM collected one groundwater sample from each of the existing groundwater monitoring wells (MW-1, MW-2 , and MW-3) on June 7 , 1993 Additional samples were acquired on June 28 and 29, 1993 for the purpose of meeting quarterly compliance monitoring requirements . The results of the analyses performed on these samples and the results of analyses performed on samples previously acquired by AES are summarized in Table 2 . On September 30 and October 1 , 1993, Del Tech Geotechnical Support Services of Oakdale advanced nine (9) soil borings at the locations shown on Figure 2 in order to further define the extent of soil and shallow groundwater contamination. Each boring was advanced with a hand auger . Discrete soil samples and a grab water sample were acquired from each borehole Each soil sample was collected within a 1. 9 inch diameter by 4.0 inch long clean brass sleeve fitted within a drive sampler lowered into the borehole to a point accessed by the hand auger. Upon being retrieved, the drive sampler was opened and the brass sleeve removed. The ends of each sleeve were then covered with teflon sheeting/aluminum foil , fitted with plastic caps, and sealed with duct tape. Each tube was then marked and placed in an iced, insulated container for transportation to JL Analytical Services , Inc of Modesto, a California- state certified hazardous waste analytical laboratory, under chain of custody Subsequent analyses were performed for Total Petroleum Hydrocarbons as Diesel (TPH-D) , Total Petroleum Hydrocarbons as Gasoline (TPH-G) , benzene, toluene, ethylbenzene, and total xylenes (BTEX) using EPA Methods 3550/8015 and 5030/8015-8020 , respectively; and for Total Oil and Grease (TOG) using SM 5520 D&F. Page 3