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1*e 1 0 <br /> Page 5 of 10 <br /> Groundwater Monitoring Data <br /> ARCO Service Station No. 2130 <br /> 7906 North El Dorado Street, Stockton, California <br /> Well Elevation Static Water Groundwater Ethyl- Total <br /> Number Date Top of Casing Top of Screen Level Elevation TPHG Benzene Toluene benzene Xylene MTBE Observations <br /> MW-4 10/06/92 1457 5500 6460 -5003 260 26 3 5 <0 5 22 NA No FP,No S <br /> MW-4 11/11/92 1457 5500 63 87 4940 NA NA NA NA NA NA No FP,No S <br /> MW-4 12/04/92 1457 5500 63 12 -4855 NA NA NA NA NA NA No FP,No S <br /> MW-4 01/20/93 1457 5500 6183 -4726 820 I60 6 9 <5* 71 NA No FP,No S <br /> MW-4 03/22/93 1457 55 00 5995 -4538 NA NA NA NA NA NA No FP,No S <br /> MW-4 04/06/93 1457 5500 5944 -44 87 1,000 250 26 <2 5 120 NA No FP,No S <br /> MW-4 07/30/93 1457 5500 6023 -4566 880 220 50 4 5 68 NA No FP,No S <br /> MW-4 11/29/93 1457 5500 WELL INACCESSIBLE No FP,No S <br /> MW-4 03/23/94 1457 5500 5429 -3972 580 97 17 4 3 29 NA No FP,No S <br /> MW-4 06/22/94 1457 5500 5441 -3984 1,700 930 4 4 52 20 NA No FP,No S <br /> MW-4 09/28/94 1457 5500 5826 -4369 610 73 2 2 13 18 NA No FP,No S <br /> MW-4 12/01/94 1457 5500 57 18 4261 1,000 400 31 59 15 NA No FP,No S <br /> MW-4 02/28/95 1457 5500 5427 -3970 <50 0 9 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-4 05/19/95 1457 5500 5238 -3781 <50 <0 5 <0 5 <0 5 <0 5 NA ' No FP,No S <br /> MW-4 08/28/95 1457 5500 54 10 -3953 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-4 12/07/95 1457 5500 5269 -38 12 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-4 02/05196 1457 5500 5012 -3555 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-4 05/30/96 1457 5500 4721 -3264 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-4 09/18/96 1457 5500 5180 -3723 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-4 11/26/96 1457 5500 4884 -3427 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-4 03/24/97 1457 5500 4384 -2927 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-4 05/20/97 1457 5500 4434 -2977 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-4 08/I9/97 1457 5500 4789 -3332 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-4 11/19/97 1457 5500 4601 -3144 <50 1 1 068 <0 5 054 <5 No FP,No S <br /> MW-4 03/04/98 1457 5500 4164 -2707 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> N IXLS10805111409103269SRI }CLS <br /> Sheet I <br /> �LKttaC�P, � <br /> 05/08/98 <br />