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<br /> Groundwater Monitoring Data
<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-1
<br /> W49-MW1 10/30/91 1036 4958 4851 -3922 <50 21 <0 50 <0 50 096 NA No FP,No S,No 0
<br /> W49-MWl# 10/30/91 1036 NM NM <50 <0 50 <0 50 <0 50 <0 50 NA NE
<br /> MW-1(56) 03/18/92 1036 4630 -3594 130 1800 <0 50 <0 50 17 NA No FP,No S,No O
<br /> MW-1(56) 06/10/92 1036 4810 -3774 <50 10 <0 50 <0 50 <0 50 NA No FP,No S,No 0
<br /> MW-1(56) 09/04/92 1036 4985 -3949 260 87 *<1 *<1 *<1 NA No FP,No S,Yes 0
<br /> MW-1(56) 12/04/92 1036 4883 -3847 **150 70 <0 50 <0 50 <0 50 NA No FP,No S,Yes 0
<br /> MW-1 03/04/93 1036 Well paved over NA No FP,No S,Yes 0
<br /> MW-1(56) 06/07/93 1036 4424 -3388 160 09 <0 5 <0 5 <0 5 NA No FP,No S,Yes 0
<br /> MW-1(56) 09/02/93 1036 4614 -3578 130 09 <0 5 <0 5 <0 5 NA No 11P,No S,Yes 0
<br /> MW-1(56) 12/16/93 1036 4392 -3356 110 13 07 06 15 NA No FP,No S,Yes O
<br /> MW-1(56) 04/08/94 1036 4094 -3058 150 22 26 45 31 NA No FP,No S,0-NE
<br /> MW-1 06/22/94 1036 4140 -3104 75 17 22 3 1 65 NA No FP,No S,O=NE
<br /> MW-1(44) 09/23/94 1036 4362 -3326 150 46 14 19 42 NA No FP,No S,O=NE
<br /> MW-1(46) 12/02/94 1036 4281 -3245 60 30 14 14 24 NA No FP,No S,O=NE
<br /> MW-1(56) 02/15/95 1036 4119 -3083 59 21 25 10 33 NA No FP,No S,O=NE
<br /> MW-1(56) 05/12/95 1036 3933 -2897 84 47 41 17 65 NA No FP,No S,Yes 0
<br /> MW-1(56) 08/29/95 1036 4089 -3053 190 80 58 47 18 NA No FP,No S,Yes 0
<br /> MW-1(56) 12/04/95 1036 3953 -29 17 78 23 14 14 53 NA No FP,No S,Yes 0
<br /> MW-1 02/02/96 1036 3757 -2721 59 34 15 15 49 NA No FP,No S,No 0
<br /> MW-1(56) 05/10/96 1036 3504 -2468 92 55 21 24 12 <3 No FP,No S,No 0
<br /> MW-1(56) 08/29/96 1036 3677 -2641 100 42 14 32 12 <3 No FP,No S,No 0
<br /> MW-1(56) 11/20/96 1036 3575 -2539 140 60 15 46 18 <3 No FP,No S,No 0
<br /> MW-1(56) 03/19/97 1036 3202 -2166 230 11 22 64 20 <3 No FP,No S,No 0
<br /> MW-1(56) 05/27/97 1036 3227 -2191 300 18 16 10 25 <3 No FP,No S,No 0
<br /> MW-1(55) 08/12/97 1036 3364 -2328 110 7 075 48 96 <5 No FP,No S,No 0
<br /> MW-2
<br /> W-49-MW2 10/30/91 982 4910 4700 -3928 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,No 0
<br /> MW-2(61) 03/18/92 982 4881 -3599 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,No O
<br /> MW-2(61) 06/10/92 982 4757 -3775 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,No 0
<br /> MW-2(61) 09/04/92 982 4936 -3954 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,Yes 0
<br /> I.MW-2 61 12/04/92 982 4836 -3953 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,NoS,Yes O
<br /> NUtis\0805V4007\D93097M1 XLS Emcon
<br /> Sheet I 10/1/97
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