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now _ -- -- - - - a:a, b J _ 1 Table 4-2. Analytical Results-dgroundwater Samples, April 1987 through January 1990, ARCO Station 434, Lodi, California (continued) Conecri"aons,micrograms per liter Water TPH, C4-C12, ,.„ Monitoring surface milligrams milligrams well number Dale clevadana Benzene Mylbcnzene Toluene Xylene per liter per liter W213 (FOC 6/$8 -10.61 290 130 410 397 elevation 43.12) 9-1088 -16.11 0.9 <0.5 15.7 2.3 1/89 -13.55 <0.5 <0.5 2.0 <0.5 4/39 -11.83 <0.5 <0.5 <0.5 <0.5 -- 5189 -13.37 <0.5 <0.5 <0.5 <O.S . 6/8914.45 c0.5 <0.5 <0.5 0.9 -- i 7189 -16.30 <0.5 <0.5 <0.5 2 - 9/89 17.23d <0.5 <0.5 c0.5 1.0 1089 -16.80 <0.5 <0.5 <0.5 <0.5 11189 -15.97 <0.5 <0.5 0.8 <0.5 . 12/89 -15.20 <0.5 <05 <0.5 <0.5 _ 1190 -14.51 1.2 0.5 <0.3 1.1 <0.05 5190 -16.18 <0.3 <0.3 <0.3 0.6 <0.5 W-3(TOC 4/87 -6.22 30,363 118W 38,000 14,00) 180 elevation 42.48) 7/87 -11.89 12.,000 2,400 23,000 15,500 227.3 1187 -11.54 3,4010 2,700 3,7.00 8,500 176.9 9.101818 -16.24 10.3 1.9 14.8 9.5 1/89 -13.95 2,250 210 4,320 2,600 4/89 -12.31 2,990 240 70 2,380 7/89 -16.66 1,480 70 520 420 1089 -17.36 669 33 253 280 -. 1/90 -14.92 3,200 580 2,600 5,300 13 5190 -16.14 1,800 1 130 1 910 1 1,600 5.5 W4 (TOC 7/87 -9.17 1.6 0.9 <0.5 10 <0.9 elevation 43.06) 11/87 -12.04 2 3 9 32 <0.2 4/88 -10.30 <0.5 <0.5 <0.5 <0.5 9-1088 -16.23 <0.5 <0.5 <0.5 <0.5 - 189 .14.53 <0.5 <0.5 <0.5 <0.5 - 489 -12.92 <0.5 <0.5 <0.5 e0.5 7189 -16.06 <0.5 <0.5 <0.5 <0.5 . 089 -17.71 <0.5 <0.5 <0.5 <0.5 - ' - 1190 15.60 0.5 <0.3 0.4 0.6 <0.05 5/9121 -16.05 NS NS NS N5 -- _W-5-(TOC--- --7/87------- ._....-..10:32- -...---0.8 --------- -0.6 ---- 12 - S - c0.9 ------- -- -------- -- --� elevation 41.90) 1!/87 -11.81 1 <0S <0.5 2 <0.2 9/88 •9.94 2 <0.5 <0.5 <0.5 .. 1 9.10/88 -I6.31 <0.5 <0.5 <0.5 <0.5 1/89 -14.24 4.2 <0.5 <0.5 <0.5 _ 4189 -12.67 <0.5 <0.5 <0.5 <0.5 789 -16.52 6.7 <0.5 <0.5 <0.5 -- 1089 -17.61 <0.5 <0.5 <0.5 <0.5 -- 1/90 -I5.30 2.4 5.8 11 68 0.98 5150 -16.25 <0.3 5.4 4.9 5.5 0.76 t., r