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� � � 1♦ � � � l• � � � � 1• � � � 1• � � <br /> TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA j <br /> Casing Depth Groundwater LPH _ Concentration (Pg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> i <br /> P1 10/19/95 779 2478 -1699 000 84 97 250 180 2,700 <25 <br /> 02/13/96 2252 -1473 000 84 <5 0 230 70 3,300 -- <br /> 04/18/96 2070 -1291 000 <br /> 08/08/96 2141 -1362 000 <br /> 11/04/96 2205 -1426 000 67 <5 0 170 21 2,000 <25 <br /> 02/03/97 1750 -971 000 _- <br /> 05/08/97 643 1714 -1071 000 41 2 9 120 48 1,500 7 1 <br /> 08/26/97 1882 -1239 000 <br /> 11/11/97 1936 -12 93 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 1341 -698 000 20 1 1 91 28 940 13 <br /> 03/03/98 3 7* <br /> 05/20/98 13 75 -732 000 20 <5 0 110 19 1,600 <25 <br /> 05/20/98 3 1* <br /> 08/19/98 15 21 -8 78 000 16 2 5 17 l 3 250 3 0 <br /> 08/19/98 <2 0* <br /> 11/18/98 1561 -9 18 000 <br /> 03/30/99 -- -- <br /> 05/05/99 1437 -794 000 <br /> 03/08/01 -- - -- -- - -- -- -- -- <br /> P2 01/30/91 7 87 3022 -2235 000 <br /> 05/02/91 30 13 -2226 000 140 13 650 610 5,400 -- <br /> 07/16-17191 3105 -23 18 000 61 <5 300 220 5,200 -- <br /> 10/15/91 3164 -23 77 000 20 8 2 90 63 1,500 -- <br /> 01/28/92 2993 -2206 000 53 24 170 120 2,900 -- <br /> 04/30/92 2951 -2164 000 52 <2 5 160 120 2,000 -- <br /> f 08/13/92 31 53 -23 66 000 45 12 100 76 2,100 -- <br /> 11PrOILLis1739421masterlurp\g3O]13942gw xls Page 24 of 41 <br />