|
TABLE I GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA
<br /> Casing Depth Groundwater LPH Concenthation(pg/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No Date (feet msl) (feet) (feet ms1) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> RW 1 05/22/90 905 3074 -2169 000 2,000 7,500 2,000 9,800 58,000 --
<br /> 09/25/90 3237 -2332 000 7,100 16,000 2,000 9,200 72,000 --
<br /> 12/19/90 3229 -2324 000 9,000 20,000 2,300 11,000 73,000 --
<br /> 01/30/91 3267 -2362 000 4,400 13,000 1,700 8,400 57,000 --
<br /> 05/02/91 32 63 -23 58 000 5,700 17,000 2,700 12,000 67,000 --
<br /> 07/16-17191 33 59 -2454 000 5,100 17,000 1,700 8,100 61,000 --
<br /> 10/15/91 3402 -2497 000 7,000 21,000 2,600 12,000 93,000 -
<br /> 01/28/92 3236 -2331 000 5,500 18,000 2,500 10,000 66,000 --
<br /> 04/30/92 -- -- -- -- -- -- -- -
<br /> 08/13/92 3393 -2488 000 4,700 19,000 2,500 12,000 92,000 --
<br /> 10/08/92 3448 -2543 000 2,200 8,400 1,500 6,600 52,000 --
<br /> 02/23/93 3169 -2264 000 1,800 4,100 1,000 3,900 26,000 --
<br /> 05/18/93 2974 -2069 000 1,900 7,800 1,300 5,000 36,000 --
<br /> 08/22/93 3003 -2098 000 1,800 7,600 1,500 5,800 39,000 --
<br /> 12/30/93 2938 -2033 000 1,600 2,400 1,300 3,700 20,000 --
<br /> 02/17/94 2897 -1992 000 1,000 4,000 1,100 3,600 26,000 --
<br /> 05/10/94 2853 -1948 000 1,200 5,300 1,400 5,000 34,000 --
<br /> 08/02/94 2995 -2090 000 1,300 4,700 1,400 4,800 28,000 --
<br /> 11/01/94 3034 -2129 000 1,100 4,600 1,300 4,600 28,000 --
<br /> 02/17/95 27 82 -1877 000 820 3,600 1,200 3,900 24,000 --
<br /> 05/11/95 25 13 -1608 000 780 4,000 1,300 4,300 32,000 --
<br /> 08/24/95 2641 -1736 000 820 4,000 1,500 4,600 24,000 --
<br /> 10/19/95 2685 -1780 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 -13 24 000 510 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 19 63 -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 /> f Iprojects1739424mastcr%wp%g900U 942yw As Pate 23 of 37
<br />
|