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1 TABLE 3 ANALYTICAL RESULTS OF WATER SAMPLES ' Ripon Farm Service 22871 South Highs+ay 99, Ripon, California (,ug/L) Sample ID TPH as TPH as Benzene Toluene Ethyl- Xylenes Samp Gasoline Diesel benzene } MW-1/5-6-94 1,700 2,400 ND ND 35 36 MW-1/8-5-94 960 1,200 ND ND 4 2 5 4 ' MW-1/11-14-94 320 570 07 03 ND 1 1 MW-1/2-24-95 160 1,400 03 ND 0 6 0 7 MW-2/5-6-94 14,000 9,200 1,200 160 3S0 1,300 MW-2/8-5-94 9,400 12,000 880 90 330 450 MW-2111-14-94 6,000 2,300 780 97 320 350 ' MW-2/2-24-95 6,800 2,800 640 130 4.10 950 MW-3/5-6-94 2,600 6,900 ND ND 6 3 8 MW-3/8-5-94 810 1,500 ND ND ND ND ' MW-3/11-14-94 460 1,900 06 0 3 ND 29 MW-3/2-24-95 250 3,500 ND 03 05 1 4.2 Petroleum Hydrocar bon Impacted Gi ound«ater Petroleum hydrocarbons and purgeable aromatics«ere detected in samples frons each «ell TPH as gasoline was detected in MW-1, MW-2 and NNW-3 at concentrations of 160 Pg/L ' (parts per billion, ppb), 6,800 ppb and 250 ppb, iespectnely TPH as diesel was detected in MW-1, MW-2 and MW-3 at concenti ations of 1 400 ppb 2,800 ppb and 3,500 ppb, respectively 1 Benzene, ethylbenzene and xylenes were detected in N1'IW-1 at concentr ations of 0 3 ppb, 0 6 ppb and 0 7 ppb, respectively Benzene, toluene, ethylbenzene and xylenes were detected ill ' MW-2 at concentrations of 640 ppb, 130 ppb, 440 ppb and 950 ppb, respectively Toluene, ethylbenzene and xylenes were detected in MW-3 at concentrations of 0 3 ppb, 0 5 ppb and 1 ppb, respectively The analytical results of the groundwater samples ale summarized ill ' Table 3 The laboratory report and chain-of-custody are included in Appendix B 5 0 CONCLUSIONS & RECOMMENDATIONS ' 5.1 Groundwater Gradient and Flow Direction The groundwater gradient at the site remains very shallow The prevailing groundwater flow Ry-h,m S-OR 2 95M3 5 10