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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 X lenes MTBE Observations
<br /> MW-1
<br /> W49-MW I 10/30/91 1036 4958 4851 -3922 <50 2 1 <0 50 <0 50 096 NA No FP,No S,No 0
<br /> W-49-MW 1# 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 -35 94 130 1800 <0 50 <0 50 17 NA No FP,No S,No 0
<br /> MW-1(56) 06/10/92 1036 4810 -37 74 <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 *<i *<1 NA No FP,No S,Yes 0
<br /> MW-1(56) 12/04/92 1036 4883 -3847 **150 7 0 <0 50 <0 50 <0 50 NA No FP,No S,Yes O
<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 -33 88 160 0 9 <0 5 <0 5 <0 5 NA No FP,No S, Yes O
<br /> MW-1(56) 09/02/93 1036 4614 -35 78 130 0 9 <0 5 <0 5 <0 5 NA No FP,No S,Yes 0
<br /> MW-1(56) 12/16/93 1036 4392 -3356 110 13 07 0 6 15 NA No FP,No S,Yes 0
<br /> MW-1(56) 04/08/94 1036 4094 -3058 150 22 26 4 5 31 NA No FP,No S,0-
<br /> NE
<br /> MW-1 06/22/94 1036 4140 -3104 75 17 2 2 3 1 65 NA No FP,No S,O=NE
<br /> MW-1(44) 09/23/94 1036 4362 -3326 150 4 6 14 19 4 2 NA No FP,No S,0=N
<br /> MW-1(46) 12/02/94 1036 4281 -3245 60 3 0 14 14 24 NA No FP,No S,O=NE
<br /> MW-1(56) 02/15/95 1036 41 19 -30 83 59 2 1 2 5 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 8 0 58 47 18 NA No FP,No S,Yes O
<br /> MW-1(56) 12/04/95 1036 3953 -29 17 78 2 3 14 14 5 3 NA No FP,No S,Yes 0
<br /> MW-1 02/02/96 1036 3757 -2721 59 34 15 15 4 9 NA No FP,No S,No 0
<br /> MW-1(56) 05/10/96 1036 35 04 -2468 92 55 21 2 4 12 <3 No FP,No S,No 0
<br /> MW-1(56) 08/29/96 1036 3677 -2641 100 4 2 14 3 2 12 <3 No FP,No S,No 0
<br /> MW-1(56) 11/20/96 1036 3575 -25 39 140 6 0 15 4 6 18 <3 No FP,No S,No 0
<br /> MW-1(56) 03/19/97 1036 3202 -2166 230 11 2 2 64 20 <3 No FP,No S,No 0
<br /> MW-2
<br /> W-49-MW2 I0/30/91 9 82 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 9 82 4881 -35 99 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,No 0
<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 9 82 4936 -3954 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,Yes O
<br /> MW-2(61) 12/04/92 982 4836 -3953 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,Yes 0
<br /> MW-2(61) 03/04/93 982 4546 -35 64 **57 *<0 6 <0 5 <0 5 <0 5 NA No FP,No S,Yes 0
<br /> MW-2(61) 06/07/93 982 4384 -34 02 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> N\x1s\0805V4007\041497MI As Revision 1 4/29/97
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