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<br /> Groundwater Monitoring Data Page 3 of 5
<br /> ARCO Service Station No. 548, 1612 Hammer Lane, Stockton, California
<br /> Well Elevation Static Top Elevation
<br /> Sample of Top Water of of Ethyl- Total
<br /> Number Date of Casing Level Screen Groundwater TPHG Benzene Toluene benzene Xylenes MTBE Observations
<br /> MW-3(cont)
<br /> MW-3(47) 12/02/94 995 4232 -3237 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE
<br /> MW-3(62) 02/15/95 995 4069 -3074 **84 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE
<br /> MW-3(62) 05/12/95 995 3880 -2885 **100 <0 5 <0 5 <0 5 <0 5 NA No,FP,No S,No 0
<br /> MW-3(62) 08/29/95 995 4027 -3032 *<170 <0 5 <0 5 <0 5 <0 5 NA No,FP,No S,No 0
<br /> MW-3(62) 12/04/95 995 3906 -29 11 *<150 <0 5 <0 5 <0 5 <0 5 NA No,FP,No S,No 0
<br /> MW-3 02/02/96 995 37 10 -2715 *<100 <0 5 <0 5 <0 5 <0 5 NA No,FP, No S,No 0
<br /> MW-3(62) 05/10/96 995 3453 -2458 **<100 <0 5 <0 5 <0 5 <0 5 <3 No,FP, No S,No 0
<br /> MW-3(62) 08/29/96 995 3621 -2626 **<90 <0 5 <0 5 <0 5 <0 5 *<4 No,FP,No S,No 0
<br /> MW-3(62) 11/20/96 995 35 31 -2536 **<90 <0 5 <0 5 <0 5 <0 5 <3 No,FP,No S,No 0
<br /> N4W-3(62) 03/19/97 995 3154 -2159 **<80 <0 5 <0 5 <0 5 <0 5 <3 No,FP,No S, No 0
<br /> MW-3 05/27/97 995 31 16 -2121 **<70 <0 5 <0 5 <0 5 <0 5 <3 No,FP,No S,No 0
<br /> MW-4
<br /> W-25-MW4 10/30/91 1157 5045 4400 -3888 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,No 0
<br /> MW-4(63) 03/18/92 1157 4724 -3567 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,No 0
<br /> MW-4(63) 06/10/92 1157 4894 -3737 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,No 0
<br /> MW4(64) 09/04/92 1157 50 65 -3908 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,Yes 0
<br /> MW-4(64) 12/04/92 1157 4973 -38 16 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,Yes 0
<br /> MW-4(63) 03/04/93 1157 4689 -3532 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,Yes 0
<br /> MW-4(63) 06/07/93 1157 4522 -3365 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-4(63) 09/02/93 1157 4696 -3539 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-4(63) 12/16/93 1157 4488 -3331 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW4(41) 04/08/94 1157 4197 -3040 26 12 20 05 26 NA No FP,No S,O=NE
<br /> MW4 06/22/94 1157 4226 -3069 <10 <0 3 <0 3 <0 3 <0 5 NA No FP,No S,O=NE
<br /> MW4(45) 09/23/94 1157 4442 -3285 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE
<br /> MW-4(48) 12/02/94 1157 4369 -3212 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE
<br /> MW-4(63) 02/15/95 1157 4212 -3055 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE
<br /> MW4(63) 05/12/95 11 57 4028 -2871 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-4(63) 08/29/95 1157 4172 -3015 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-4(63) 12/04/95 1157 4044 -2887 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW4 02/02/96 1157 3854 -2697 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW4(63) 05/10/96 1157 3602 -2445 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> N\xls\0805\14007\06I897M1 XIS Emcon
<br /> Sleet] Revision 0.7/I5/97
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