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Table 4-2. Analytical Results--Groundwater Samples,
<br /> April 1987 through January 1990, ARCO
<br /> Station 434, Lodi, California
<br /> Concentrations,micrograms per liter Pi; �r'1Vi
<br /> Water TPH, C4-C12,
<br /> Monitoring surface milligrams milligrams
<br /> well number Date elevations Benzene Ethylbenzene Toluene Xylene per liter per liter
<br /> W-1 4/87 -6.08 120 <1.0 <1.0 <1.0 120
<br /> (TOC elevation 7/87 -;0.31 180 <2.5 200 190 <0.9
<br /> 42.87) 11187 -11.39 1,600 1,400 2,300 6,900 147.2
<br /> 1/89 -13.70 3,680 130 740 2,280 -e
<br /> ` .-. 4189 -11.60 2,920 <50 1,050 2,830 -
<br /> 7/89 -16.54 1,140 16 310 685
<br /> ` 10/89 -17.13 NS NS NS NS NS
<br /> 1190 -- NS NS NS NS NS
<br /> - W-IA(TOC 4/90 -15.57 490 4.1 81 540 2.8
<br /> E elevation 42,94)
<br /> 1 W-2(TOC 4/87 -6.21 4,100 680 9,200 5,500 64
<br /> elevation 42.94) 7/87 -11.48 14,00 2,300 25,000 16,00 281.7
<br /> 11187 -11.55 6,200 5,600 5,300 13,000 343.9
<br /> 6/88 -13.85 3,570 755 3,900 3,000 --
<br /> 1 9-10/88 -16.29 260 110 50G 410 --
<br /> { 1/89 -13.51 4,400 510 4,540 2,740 --
<br /> i 4/89 -12.27 4,200 450 110 2,620 --
<br /> 7189 -16.36 2.090 200 I,500 1,150 --
<br /> 10,B9 -17.31 496 37 206 219 --
<br /> 1/90 -14.96 3,600 470 4,500 5,000 18
<br /> i SIJO -16,09 .4,900 350 4,000 5,000 17
<br /> i
<br /> `- W-2A(TOC 61813 -8.39 437 140 937 672 --
<br /> ,; elevation 42.92) 9-1088 -16.21 55.8 6.4 16.3 15 3 --
<br /> 1/89 -13.68 760 11 220 214
<br /> la, 4/89 -12.14 700 78.3 14.4 520 --
<br /> 's 7/89 -17.18 390 30 90 100
<br /> 10189 -17.18 3,090 50 1,060 1,110 -.
<br /> I/90 -14.92 900 64 510 635 2.4
<br /> 1 5190 -16.98 2.500 150 1,500 2,100 6.5
<br /> F
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