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TABLE ] GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration(µg/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No Date (feet MSI) (feet) (feet rrisl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> I
<br /> MW9 02/29/00 6 57 1333 -676 000 <1 <1 <1 <1 <50 4 8
<br /> 05/16/00 1339 -6 82 000 -- -- --
<br /> 09/11/00
<br /> -091111130 _
<br /> MW10 04/11/88 861 23 18 -1457 000 640 130 170 140 3,100 --
<br /> 09/13/88 2585 -1724 000 4,800 130 340 240 7,700 --
<br /> 11/16/88 2608 -1747 000 5,800 290 700 340 9,400 --
<br /> 02/09/89 2570 -1709 000 7,500 450 220 320 8,800 --
<br /> 05/31/89 2744 -1883 000 11,000 320 1,600 800 24,000 --
<br /> 08/17/89 2945 -2084 000 12,000 2,100 3,100 2,500 35,000 --
<br /> 03/21/90 Not accessible __ _- _-
<br /> 05/17/90 Not accessible -- --
<br /> 06/27/90 32 52 -2391 000 9,700 4,800 2,400 5,300 51,000 --
<br /> 09/25/90 3395 -2534 000 I3,000 9,900 2,700 8,900 71,000 --
<br /> 12/19/90 3379 -25 18 000 16,000 16,000 3,300 11,000 81,000 --
<br /> 01/30/91 3424 -25 63 000 18,000 15,000 2,600 9,900 62,000 --
<br /> 05/02/91 3424 -2563 000 6,900 5,700 2,100 5,900 27,000 --
<br /> 07/16-17191 35 13 -26 52 a 000 -- _- --
<br /> 10/15/91 Dry
<br /> 01/28/92 33 86 -2525 000
<br /> 04/30/92 3352 -2491 000
<br /> 08/13/92 3500 -2639 000
<br /> 10/08/92 Dry __ --
<br /> __ _- --
<br /> 02/23/93 3285 -2424 000 1,100 17,000 3,300 15,000 91,000 --
<br /> 05/18/93 3132 -2271 000 6,200 9,200 1,400 5,300 44,000 --
<br /> 08122/93 3170 -2309 000 7,800 15,000 1,700 7,900 66,000 --
<br /> 12/30/93 3079 -22 18 000 -- -- --
<br /> __
<br /> 02/17/94 3025 -21 64 000 870 1,300 310 770 9,400 --
<br /> 05/10/94 2975 -21 12 000 1,400 3,800 470 1,700 21,000 --
<br /> 08/02/94 31 33 -2272 000 510 130 150 400 5,700 --
<br /> 11/01/94 3176 -23 15 000 4,100 16,000 1,600 7,500 64,0000 --
<br /> flpro>ecIs\73942VmasicAwp5g90oU942yw xis Paye 15 of 37
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