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Table i <br /> Groundwater Monitoring Data <br /> 1995 to Present <br /> ARCO Service Station No. 2130 <br /> 7906 North El Dorado Street, Stockton, California <br /> Page 4 of 9 <br /> Well Elevation Static Water Groundwater Ethyl- Total <br /> Number Date To2 of Casing Top of Screen Level Elevation TPHG Benzene Toluene benzene Xylene MTBE Observations <br /> MW-4 06/04/99 1457 3586 -2129 <50 <05 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-4 09/02/99 14S7 4059 -26 02 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-4 11/29/99 1457 38 78 -24 21 <50 <0 5 <0 5 <0 5 <0 5 <2S No FP,No S <br /> MW-4 03/16/00 1457 3475 -20 18 <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> MW-5 08/28/95 1510 5800 S461 -3951 130 27 <0 5 45 0 6 NA No FP,No S <br /> MW-5 12/07/95 1510 5320 -3810 <200** 21 <0 5 07 <0 5 NA No FP,No S <br /> MW-5 02/05/96 1510 5067 -3557 <200** 3 0 <0 5 0 9 <0 S NA No FP,No S <br /> MW-5 05/30/96 1510 4770 -3260 140*** 15 <0 5 5 2 <05 <4** No FP,No S <br /> MW-5 09/18/96 1510 5156 -3646 <300*** 33 <05 9 0 <0 5 <3 No FP,No S <br /> MW-5 11/26/96 1510 4934 -34 24 <200*** 19 <0 5 0 5 <0 5 <4** No FP,No S <br /> MW-5 03/24/97 1510 4424 -29 14 <200*** 3 2 <0 5 16 3 0 <8** No FP,No S <br /> MW-5 05/20/97 1510 4485 -29 75 270 31 50 so 15 <20** No FP,No S <br /> MW-5 08/19/97 15 10 4837 -33 27 100 20 <05 38 <0 5 <5 No FP,No S <br /> MW-5 11/19/97 1510 4662 -3152 <50 12 094 <0 5 091 <5 No FP,No S <br /> MW-5 03/04/98 1510 4190 -2680 <50 56 18 16 31 <5 No FP,No S <br /> MW-5 06/26/98 1510 3964 -24 54 <50 4 19 0 624 0 794 0 999 <5 No FP,No S <br /> MW-5 09/01/98 1510 4144 -26 34 <50 13 2 <0 5 139 0 535 5 15 No FP,No S <br /> MW-5 12/02/98 1510 3874 -2364 <50 0 693 <0 5 <0 5 <0 5 894 No FP,No S <br /> MW-5 03/31/99 1510 3517 -2007 <50 133 0 586 <0 5 152 994 No FP,No S <br /> MW-5 06/04/99 1510 3648 -2138 <50 503 0 721 <0 5 16 706 No FP,No S <br /> MW-5 09/02/99 1510 4105 -25 95 <50 6 14 <0 5 183 0 848 <5 No FP,No S <br /> MW-5 11/29/99 1510 3916 -24 06 <50 0 585 0 633 <0 5 145 269 No FP,No S <br /> MW-5 03/16/00 1510 3516 -20 06 571 5 17 <0 5 <0 5 <0 5 493 No FP,No S <br /> MW-6 02/28/95 1455 5900 54 54 -3999 55 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-6 05/19/95 1455 5259 -3804 96*** <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-6 08/28/95 1455 5425 -3970 120 <0 5 <05 <0 5 <0 5 NA No FP,No S <br /> MW-6 12/07/95 1455 5291 -3836 <200** <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> CP1CIARCH1VE\ARC0121301QTRLY12130g100 IT Corporation <br /> 5/2/00 <br />