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• <br /> TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH _ _ Concentration (pg/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 /> MW5 05/11/95 958 2572 <br /> -1614 000 14 12 7 5 48 350 -- <br /> 08/24/95 23 35 -13 77 000 <0 5 <0 5 072 15 85 -- <br /> 10/19/95 2720 -1762 000 <0 5 <0 5 1 1 1 1 85 <2 5 <br /> 02/13/96 Well dry -- -- -- -- -- -- <br /> 04/18/96 2200 -1242 000 <0 5 <0 5 <0 5 0 68 65 <2 5 <br /> 08/08/96 24 22 -1464 000 -- -- -- -- -- <br /> 11/04/96 2468 -15 10 000 -- -- -- -- -- <br /> 02/03/97 19 89 -1031 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/08197 863 1943 -1080 000 <0 5 <0 5 <0 5 <0 5 56 <2 5 <br /> 08/26/97 2019 -1156 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 11/11/97 Well dry -- -- -- -- -- -- <br /> 03/03/98 1612 -749 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 <2 0* <br /> 05/20/98 1560 -697 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/20/98 <2 0* <br /> 08/19/98 1745 -8 82 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 08/19/98 <2 0* <br /> 11/18/98 1798 -935 000 <05 <05 <05 <05 <50 <25 <br /> 03/30/99 -- -- -- -- -- -- -- -- -- <br /> 05/05/99 1641 -778 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08/20/99 17 87 -924 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 12/06/99 18 16 -953 000 <1 <1 <1 <1 <50 <1 <br /> 02/29/00 15 59 -696 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 1566 -7 03 000 <1 <1 <1 <1 <50 <1 <br /> 09/11/00 1801 -938 000 <05 <05 <05 <05 <50 <05 <br /> 12/13/00 1795 -932 000 <0 5 <0 5 <0 5 0.65 190 <0 5 <br /> f tipro3ects1739421masterlwptq 120013942gw xls Page 10 of 43 <br />