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-- 4-2 <br /> Table 4-1. Analytical Pssults of Groundwater. Sampling <br /> at ARCO Station 2133, May 11 and 12, 198r <br /> EFA 8015b EPA 602c <br /> Sample total petroleum Tota <br /> number fuel hydrocarbons Benzene Ethylbenzene Toluene Xylene lead <br /> E-2 2 <0.5 <0.5 15 <0.5 0.008 <br /> E-3 29 18,600 1,000 10,000 16,000 0.011 <br /> r. E-4 24 6,400 <10 490 3,300 0.043 <br /> +.; E-5 11 4,000 170 1,300 1,600 0.019 <br /> E-6 71 520 <10 2,300 6,400 0.15 <br /> E-7 <1 140 28 360 890 0.297 <br /> E-8 3.8 300 <10 100 570 0.017 <br /> E-9 17 10,000 <10 2,600 7,900 0.031 <br /> E-10 76 7,000 1,500 11,000 11,000 0.007 <br /> E-11 83 4,600 <23 2,200 16,000 0.002 <br /> " E-12 <1 <0,5 <0.5 <0.5 <0.5 0.050 r <br /> aC'omplete laboratory reports included in Appendix E, <br /> bResults shown in milligrams per liter (mg/1). <br /> cResults shown in micrograms per.-liter (ug/1). <br /> Table 4-2. PID Vapor Concentration Readings for Groundwater kbiitoring <br /> _. Wells at ARCO Station 2133, May 11 and 12, 1987 <br /> 1 <br /> -- l <br /> Vepor concentration in <br /> Well number parts per million <br /> E-2 420 <br /> - E-3 237 <br /> E-4 370 <br /> E-5 95 <br /> E-6 299 <br /> E-7 1.4 <br /> E-8 267 <br /> F-9 123 <br /> E-10 10.5 <br /> E-11 239 <br /> E-12 4.0 E <br />