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Hydrocarbons as Gasoline (TPH-G) , toluene, ethylbenzene , <br /> and total xylenes were present in a groundwater sample <br /> acquired from monitoring well MW-2 . . . one of three on-site <br /> groundwater monitoring wells . The analytical results <br /> reported by AES appear in Table 1 . <br /> Detectable concentrations of fuel hydrocarbons were also <br /> present in soil samples acquired during the installation of <br /> monitoring wells MW-1 and MW-3 during July, 1991 , and in <br /> other soil samples acquired from the area formerly occupied <br /> by the underground gasoline storage tanks during July, 1989 <br /> and July , 1990 . <br /> Four soil borings were also advanced during during July of <br /> 1991. Soil samples acquired from these borings contained <br /> significant levels of fuel hydrocarbons (including 5 ,100 <br /> parts per million {ppm} Total Petroleum Hydrocarbons as <br /> Gasoline {TPH-G} and 2 , 000 parts per billion {ppb) benzene <br /> in SB1 at 9 feet, and 220 ppm TPH-G in SB2) . <br /> OVERVIEW OF ENVIRONMENTAL COMPLIANCE ACTIVITIES PERFORMED <br /> DURING THE PAST QUARTER <br /> EPM Technologies , Inc has prepared and submitted letters <br /> and a proposal for the determination of the extent of fuel <br /> hydrocarbon contamination of soil and groundwater to <br /> PHS/EHD and the Central Valley Regional Water Quality <br /> Control Board. <br /> With the approval of Ms . Mary Meays , EPM collected one <br /> groundwater sample from each of the existing groundwater <br /> monitoring wells (MW-1 , MW-2 , and MW-3 ) on June 7 , 1993 <br /> Additional samples were acquired on June 28 and 29, 1993 . <br /> METHODOLOGY <br /> Depth to water and total well depth were measured using an <br /> electric tape and the volume of water within each well <br /> casing was computed. Each well was then purged using a <br /> clean, disposable, polyethylene bailer or a submersible <br /> three-stage electric pump until the groundwater was free of <br /> significant sand, silt, and/or other grit , and temperature, <br /> pH, and electrical conductivity readings stabilized. In <br /> this case, over three well volumes of water were removed <br /> from each well casing Measurements acquired during the <br /> June 7 and June 28-29th sampling events appear on the well <br /> monitoring forms enclosed in Appendix A. <br /> Subsequent to the purging of each well , a groundwater <br /> • sample was collected. . either in a clean, disposable <br /> polyethylene bailer or from the discharge line of the <br /> Page 3 <br />