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.-a <br /> 4.0 DISCUSSION <br /> 4.1 Hydrogeololy <br /> The ground-water flow direction in November 1991 is to the south with a gradient of 0.0074 <br /> feet/foot(39.1 feet/mile). This is similar to the flow directions reported in November 1990, <br /> February 1991, May 1991, and August 1991 data. <br /> 4.2 Ground-Water Analysis <br /> No petroleum hydrocarbons (TEH-diesel and kerosene or BTEX)were detected in ground <br /> water collected from MW-1 and MW-2 which are down-gradient and cross-gradient, <br /> respectively. from the former underground storage tank. Only samples analyzed from the <br /> up-gradient well,MW-3,reported detectable concentrations of BTEX. These concentrations <br /> are well below [lie State of California Action Levels for the respective BTEX components. <br /> and duplicate samples indicate that ESE's and the <br /> Nondetectable results from the trip blank <br /> laboratory's handling procedures were adequate. <br /> t"r <br /> kkk <br /> k <br /> 9 <br />