|
TABLE I GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration(gg/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 /> RW 1 11/11/97 770 21 11 -1341 000 410 1,500 750 1,800 13,000 520
<br /> 11/11/97 <25*
<br /> 03/03/98 15 51 -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
<br /> <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 1531 -761 000 197 678 432 967 8,150 <20
<br /> 05/05/99 1566 -796 000 234 833 499 1,270 8,680 584
<br /> 08/20/99 1731 -961 000 234 415 409 728 6,450 315
<br /> 12/06/99 1742 -972 000 180 220 310 500 4,300 <5
<br /> 02/29/00 15 05 -7 35 000 280 200 750 1,270 14,000 <1
<br /> 05/16/00 1488 -7 18 000 280 190 670 1,010 10,000 15
<br /> 09/11/00 1725 -9 55 000 300 240 550 950 9,400 <5
<br /> RW2 05/22/90 8 13 2940 -21 27 000 2,000 6,100 1,800 10,000 51,000 --
<br /> 09/25/90 3079 -2266 000 1,000 5,200 1,600 8,600 33,000 --
<br /> 12/19/90 3062 -2249 000 940 3,500 860 5,200 16,000 --
<br /> 01/30/91 3108 -2295 000 580 2,300 580 3,600 13,000 --
<br /> 05/02/91 3097 -2284 000 1,600 3,400 1,600 7,900 32,000 --
<br /> 07/16-17/91 3195 -23 82 000 600 1,900 730 3,900 21,000 --
<br /> 10/15/91 3253 -2440 000 510 2,700 720 3,300 22,000 --
<br /> 01/28/92 3076 -2263 000 260 1,200 590 2,500 17,000 --
<br /> 04/30/92 Not accessible __ __
<br /> 08/13/92 3247 -2434 000 130 630 280 1,100 8,500 --
<br /> 10/08/92 33 03 -2490 000 130 630 250 1,400 11,000 --
<br /> 02/23/93 2971 -2158 000 130 580 1,000 2,000 9,700
<br /> 05/18/93 2830 -20 17 000 420 1,400 750 2,400 16,000 --
<br /> 09122/93 2857 -2044 000 330 1,100 620 1,900 15,000 --
<br /> t'prujec;s4739421rnasterli�plQ900i3942bw xis Pabe 24 of 37
<br />
|