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El <br /> MvIM <br /> mak <br /> nw <br /> L <br /> Table 1. Analytical Results--Groundwater Samples, <br /> April 1987 through January 1991, ARCO <br /> Station 43.1, Lodi, California (continued) <br /> Concentrations, micrograms per liter <br /> Water <br /> *Monitoring surface <br /> well number Date elevation` Benzene L-thylbenzcne Toluene xylenes TP11 C4-C12 <br /> W-2B (TOC 6/88 -10.61 290 130 410 397 <br /> elevation 43.12) 9-10/88 -16.1I 0.9 <0.5 15.7 2.3 <br /> 1/89 -13.55 <0.5 <0.5 2.0 <0.5 <br /> 4/89 -11.83 <0.5 <0.5 <0.5 <0.5 <br /> 5/89 -13.37 <0.5 <0.5 <0.5 <0.5 <br /> 6/89 -14,45 <0.5 <0.5 <0.5 0.9 <br /> 7/89 -16.30 <0.5 <0.5 <0.5 2 <br /> 9189 -17.23° <0.5 <0.5 <0.5 1.0 <br /> 10/89 -16.80 <0.5 <0.5 <0.5 <0.5 <br /> 11/89 -1597 <0.5 <0.5 0,8 <0.5 <br /> 1289 -15.20 <0.5 <0.5 <0.5 <0.5 <br /> 1/90 -14.51 1.2 0.5 <0.3 1.1 <50 <br /> 5/90 -16.18 <0.3 <0.3 <0.3 0.6 <500 <br /> 10190 -21.43 4.2 <0.5 14 <0.5 <50 <br /> 1191 -17.80 <0.5 <0.5 <0.5 <0.5 -- <50 <br /> W-3 (TOC 4/87 -6.22 30,000 1,800 38,000 14,000 180,000 <br /> elevation 42.48) 7/87 -11.89 12,000 2,400 23,000 15,500 227,300 <br /> 1187 -I1.54 3,400 2,700 3.200 8,500 176,900 <br /> 940/88 -16.24 10.3 1.9 14.8 9.5 - <br /> 1/89 -13.95 2,250 210 4,320 2,600 <br /> 4/89 -12.31 2,990 240 70 2,380 <br /> 7/89 -16.66 1,480 70 520 420 <br /> 1089 -17.36 669 33 253 280 <br /> 1/90 -1492 3,200 580 2,600 5,300 13,000 <br /> 5/90 -16.14 1,800 130 910 1,600 5,500 <br /> 10/9() -21.53 4,700 39 530 1,600 110,000 <br /> 1/91 -18.24 960 42 720 880 2,800 <br /> W-4 (TOC 7/87 -9.17 1.6 0.9 <0.5 10 <900 <br /> elevation 43.06) 11/87 -12.04 2 3 9 32 <200 <br /> 2/88 -10.30 <0.5 <0.5 <0.5 <0.5 <br /> 9-1088 -16.23 <0.5 <0.5 <0.5 <0.5 <br /> 1/89 -14,53 <0.5 <0.5 <0.5 <0.5 <br /> 4/89 -12.92 <4.5 <0.5 <0.5 <0.5 <br /> 7/89 -16.06 <0.5 <0.5 <0.5 <0.5 <br /> 10/89 -17.71 <0.5 <0.5 <0,5 <0.5 <br /> 1/90 -15.60 0.5 <0.3 0.4 0.6 <50 <br /> 5190 -16.05 NS NS NS NS <br /> 10/90 NS NS NS NS NS <br /> 1191 NS NS NS NS NS <br />