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TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942, 4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration (ug/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No Date (feet ms]) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> RWl 10/19/95 905 2685 -17 80 000 680 3,100 1,200 3,600 25,000 <250
<br /> 02/13/96 2270 -13 65 000 590 2,900 920 2,700 21,000 --
<br /> 04/18/96 2229 -1324 000 510 2,500 980 2,700 23,000 <100
<br /> 08/08/96 2344 -1439 000 600 3,200 1,200 3,500 20,000 <250
<br /> 11/04/96 23 81 -1476 000 710 2,600 1,200 3,200 23,000 900
<br /> 02/03/97 1963 -1058 000 390 1,900 680 2,000 16,000 440
<br /> 05/08/97 770 1976 -1206 000 430 2,000 860 2,300 18,000 620
<br /> 08/26/97 2051 -1281 000 600 2,600 1,200 3,400 21,000 380
<br /> 11/11/97 21 11 -1341 000 410 1,500 750 1,800 13,000 520
<br /> 11/11/97 <25*
<br /> 03/03/98 1551 -781 000 320 1,300 660 1,700 11,000 420
<br /> 03/03/98 <33*
<br /> 05/20/98 1530 -7 60 000 310 1,500 670 1,800 13,000 760
<br /> 05/20/98 <33*
<br /> 08/19/98 1675 -905 000 340 1,200 630 1,700 18,000 1,100
<br /> 08/19/98 <40*
<br /> 11/18/98 1721 -951 000 250 840 520 1,100 8,200 90
<br /> 03/30/99 15 31 -7 61 000 197 678 432 967 8,150 <20
<br /> 05/05/99 15 66 -796 000 234 833 499 1,270 8,680 584
<br /> 08/20/99 17 31 -9 61 000 234 415 409 728 6,450 315
<br /> 12/06/99 1742 -972 000 180 220 310 500 4,300 <5
<br /> 02/29/00 1505 -735 000 280 200 750 1,270 14,000 <1
<br /> 05/16/00 14 88 -7 18 000 280 190 670 1,010 10,000 15
<br /> 09/11/00 1725 -955 000 300 240 550 950 9,400 <5
<br /> 12/13/00 17 17 -947 000 330 470 1,400 3,210 29,000 <120
<br /> 03/08/01 1635 -8.65 000 53 14 120 128 2,300 <0 5
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