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i <br /> PRELIMINARY HYDROGEOLOGIC ASSESSMENT REPOR <br /> k., 5491 IF Street,Banta,California <br /> Delta Projoet No.404"1 <br /> Page 9 <br /> , <br /> TABLE-5 <br /> Ground Water Elevation Data <br /> Depth to Reference Elevation Ground Water Elevation <br /> Location Date -oynd Water (feet). (feet above sea level) feet above sea level <br /> 1V,W-1 05-12-89 13.30 100.48 87.42 <br /> 05-2489 11.94 100.48 88.77-- <br /> 06-27-89 11.89 100.72 88.83 - K <br /> �~ <br /> MW-2 05-12-89 13.48 100.67 87.45 s + r <br /> 05-2489 11.71 100.67 88.73 =r <br /> _ 06-27-89 12.11 100.93 88.82 o K <br /> - MW-3 05-12-89 13.01 100.00 86.99 a K <br /> 05-2489 11.54 100.00 88.46 o k <br /> 06-27-89 11.59 100.00 88.41 - u r{. <br /> TABLE 6 <br /> Slug Test Results <br /> i Hydraulic Conductivity <br /> y <br /> ]Location (fee dayl <br /> p' MW-1 3.71 i <br /> L� MW-2 5.30 <br /> MW-3 6.57. <br /> 3.5 Site Soil Chemistry <br /> On April 2E, 1989, two soil borings were advanced to a depth of 26.5 feet. Soil samples were collected <br /> i <br /> i at 5-foot-depth intervals and screened with a photoionization detection(PID). PID readings were recorded <br /> on the soil boring logs included as Appendix B. Samples selected for analysis were based on the PID <br /> i readings and field observations. Samples were analyzed for BTEC, EDC, EDB, and TPPH using EPA <br /> The results of the soil analyses-are-compiled in Table-7.-Data for-MW-l-were-provided- - - _ - <br /> '? by ETS. . <br /> r . Two samples were analyzed from boring MW-1, 10 feet and 20 feet below grade. The 10-foot-depth <br /> sample contained 0.3 ppm benzene and 450 ppm TPPH. The 20-foot-depth sample had a lower benzene <br /> and TPPH concentration of 0.07 ppm and 11.0 ppm, respectively. <br />