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PRELBUNHhRY HYDROGEOLOGIC ASSESSMENT REPORT <br /> 5491"F Street,Banta,California <br /> Delta Project No-40.88481 <br /> Page 10 r <br /> Bonin MW-2 was sampled at S feet and 10 feet below grade{samples MW-2-1B and MW-2-2B). Benzene <br /> Boring <br /> and TPPH were not fount in either of the MW-2 samples. Low levels of other BTEX constituents were <br /> detected. The only sample analyzed from MW-3 was MW-3-2B from 10 feet below grade and did not <br /> contain detectable BTEX or TPPH. <br /> TABLE 7 <br /> Soil Baring Analytical Results <br /> Sample <br /> ` Location T�eyth Benzene Toluene Ethvlbenzenc Xylenes EDB EDC TPPH <br /> MW-1 10 4 <br /> 4.8 8.5 NF NF 4550.0 <br /> NF`- 0.14 0.79 NF NF 11.0 <br /> MW-1 20 0.7 0.36 <br /> MW-2-1B 5 NF 0.005 0.002 0.415 NF NF a0.2 <br /> MW-2-2B 10 NF NF <0.2 <br /> NF 0.044 0.009 <br /> MW-3-2B 10 NF NF <br /> NF NF NF NF <0.2 <br /> NOTES: <br /> All results in parts per million. <br /> MW-1 samples and chemical analysis provided by ETS. <br /> f� NF = Not Found. <br /> E <br /> I 3.6 Site Ground Wafer Chemist �" <br /> Soil borings MW-i,MW-2, and MW-3 were completed a; monitoring wells with total depths of 20 feet, <br /> 26.5 feet,and 26 5 feet, respectively. Ground water samples were obtained from monitoring well MW-2 <br /> � - <br /> and MW-3 on May 12, 1989. Monitoring well MW-1 was sampled on August 22, 1988,by E1B,and by <br /> Delta on May 12,and June 27,1989. Samples collected during each event mentioned above were analyzed <br /> BTEX, EDB, and TPPH. The results of all ground water <br /> for samples analyzed to date are <br /> B , G <br /> presentee!in Table 8. Analytical results for ground water sampled from MW-2 and MW-3 show betiu <br /> and xylene concentrations well below the California state maximum contaminant Ievels (MCL) for these <br /> - T constituents.- - - - - - — ---- -- - — - -. - <br /> is <br /> Ems; <br />