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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 (L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No Date (feet msl) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> RW2 12/13/00 676 1613 -937 000 73 12 100 241 2,700 <2 5
<br /> 03/08/01 676 1523 -847 000 26 17 62 261 2,500 10
<br /> 06/21/01 676 1667 -991 0.00 78 9 9 43 403 3,700 24
<br /> 06/21/01 676 <5
<br /> RW3 05/22/90 889 3095 -2206 000 16,000 41,000 5,500 31,000 160,000 --
<br /> 12/19/90 8 89 3302 -2368 0 61 Not sampled- LPH
<br /> 01/30/91 889 33 73 -24 12 098 Not sampled- LPH
<br /> 05/02/91 889 3275 -2347 054 Not sampled - LPH
<br /> 07116-17191 8 89 3372 -2449 047 Not sampled - LPH
<br /> 10/15/91 889 3527 -25 58 1 10 Not sampled- LPH
<br /> 01/28/92 8 89 3269 -2370 0 14 Not sampled- LPH
<br /> 04/30/92 889 3227 -2334 006 Not sampled-LPH
<br /> 08/13/92 8 89 3467 -2550 039 Not sampled - LPH
<br /> 10/08/92 889 35 36 -2606 0 56 Not sampled -LPH
<br /> 02/23/93 889 31 34 -2245 000 4,100 4,300 1,600 8,300 47,000 --
<br /> 05/18/93 8 89 3002 -21 13 000 19,000 22,000 3,100 17,000 90,000 --
<br /> 08/22/93 889 30 60 -2171 000 18,000 22,000 2,800 16,000 110,000 --
<br /> 12/30/93 8 89 2963 -2074 000 18,000 22,000 2,900 15,000 96,000 --
<br /> 02/17/94 8 89 2927 -2038 000 9,600 14,000 2,200 9,600 70,000 --
<br /> 05/10/94 889 28 81 -1992 000 10,000 16,000 2,200 10,000 76,000 --
<br /> 08/02/94 8 89 3035 -2146 000 -- -- __ _- --
<br /> 11/01/94 8 89 3059 -21 70 000 11,000 16,000 2,800 14,000 92,000 --
<br /> 02/17/95 8 89 2808 -19 19 000 9,800 12,000 2,600 11,000 79,000 --
<br /> 05/11/95 889 25 37 -1648 000 7,600 10,000 2,700 12,000 90,000 --
<br /> 08/24/95 889 2672 -1783 000 9,600 15,000 4,600 20,000 100,000 --
<br /> 10/19/95 889 2705 -18 16 000 7,000 12,000 3,400 14,000 87,000 <1,000
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