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TABLE 1 <br /> RELATIVE GROUNDWATER ELEVATIONS* <br /> Ripon Farm Service <br /> 22871 South Highway 99, Ripon, California <br /> ' Depth to Groundwater Relative Groundwater <br /> Relative Casing Elevation <br /> Well No Elevation <br /> ' 5-6-94 8-5-94 5-6-94 8-5-94 <br /> MW1 9903 2021 2008 7882 7895 <br /> ' MW2 9931 2048 2040 7883 7891 <br /> MW3 9855 1967 1958 7888 7897 <br /> Measurements in I-eet <br /> 3.2 Laboratory Analysis of Water Samples <br /> Water were samples transported in a chilled container to Pan-Agricultural Laboratories, <br /> P P <br /> Incorporated (PAL) in Madera, and analyzed for total petroleum hydrocarbons (TPH as <br /> ' gasoline and diesel) and BTE&X in accordance with EPA methods 8015m and 602, <br /> respectively <br /> 4 0 FINDINGS <br /> ' 4.1 Relative Groundwater Elevation and Gradient <br /> ' Groundwater at the s]te dropped an average of 0 10 feet between May and August 1994 <br /> The average depth to groundwater at the site is 20 02 feet, the gradient was calculated to <br /> be 0 0006 ft/ft, directed N 45° W (Figure 3) <br /> 4.2 Groundwater Sample Analysis <br /> ' Petroleum hydrocarbons were detected in samples from each well TPH as gasoline was <br /> detected in MW1, M`'v2 and MW3 at concentrations of 960 Ag/L (ppb), 9,400 ppb and 810 <br /> ppb, respectively TPH as diesel was detected in MW1, MW2 and MW3 at concentrations <br /> l01 of 1,200 ppb, 12,000 ppb and 1,500 ppb, respectively <br /> Benzene, toluene, ethylbenzene and xylenes were detected in MW2 at concentrations of 880 <br />' ppb, 90 ppb, 330 ppb and 450 ppb respectively Ethylbenzene and xylenes were detected in <br /> MW1 at concentrations of 4 2 ppb and 5 4 ppb No purgeable aromatics were detected in <br /> MW-3 The analytical results of the groundwater samples are summarized in Table 2 The <br /> laboratory report and chain-of-custody are included in Appendix B <br /> GWn�al Anda Seniva lec 5 <br /> �ro4 w m s< Orcut ra s <br />