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TABLE 5 <br /> ANALYTICAL RESULTS FOR BORINGS MW-1, MW-2 & MW-3 <br /> Mid-Cal Leasing <br /> 1649 East Channel Street, Stockton, California <br /> March 9 and 10, 1993 <br />' <br /> (mg/kg) <br /> Ethyl- <br /> Sample ID TPH as Gas Benzene Toluene benzene Xylene <br />' MW1-40 ND ND ND ND ND <br /> MW1-50 ND ND ND ND ND <br /> MW2-35 ND ND ND ND ND <br />' MW2-45 ND 00079 ND ND ND <br /> MW2-50 ND ND ND ND ND <br /> i MW3-40 ND ND ND ND ND <br /> MW3-50 ND ND ND ND ND <br />' m g=parts per miLhon m <br /> ND =Not detected <br /> On March 17, 1993, the water level in each well was measured, the wells were purged, and <br /> water samples were collected The initial gradient direction was determined to be 0 0073 ft/ft <br /> directed S 7° W Benzene and xylene were detected in MW-2 at 3 7 µg/L and 1 1 ug/L, <br />' respectively A summary of all analytical results for groundwater samples is presented as <br /> Table 6 <br /> 3.4 Quarterly Groundwater Monitoring <br /> Between June 1993 and September 1994, monitoring wells at the site were sampled a total <br />' of six times Prior to each sampling, the depth to groundwater was measured in each well <br /> using a Solinst water level meter The wells were purged of standing water to stabilize pH, <br /> temperature and conductivity using submersible pumps or PVC bailers Purge water was <br /> stored on-site in 55-gallon DOT drums All samples were collected using disposable bailers <br /> and were analyzed by a state-certified laboratory for TPH as gasoline and BTE&X <br /> H3stoncaI groundwater depths are included in Table 6 <br /> I <br /> 3.4.1 Groundwater Sampling, June 1993 <br /> A second sampling event occurred on June 24, 1993 Between March 1993 and June 1993 <br /> water levels rose approximately 2 to 2 5 feet in all wells (see Table 5) The gradient <br />' direction for the June sampling event was determined to be 0 0025 ft/ft directed S 70° E <br /> 0-69-1 Audi S.—I.. 5 <br /> M-1-C-114 <br /> 1 R--d MA 6U91 <br /> I <br />