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<br /> Table 1
<br /> Groundwater Monitoring Data Page 1 of 4 -
<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-MW I 10/30/91 1036 4958 4851 -39 22 <50 2 1 <0 50 <0 50 096 NA No FP,No S,No 0
<br /> W-49-MW I# 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 18 00 <0 50 <0 50 17 NA No FP,No S,No O
<br /> MW-1(56) 06/10/92 1036 48 10 -37 74 <50 10 <0 50 <0 50 <0 50 NA No FP,No S,No O
<br /> MW-1(56) 09/04/92 1036 4985 -3949 260 87 **<i **<1 **<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 0
<br /> MW-1* 03/04/93 1036 * * * * * * * NA No FP,No S,Yes 0
<br /> MW-1(56) 06/07/93 1036 44 24 -3388 160 0 9 <0 5 <0 5 <0 5 NA No FP,No S,Yes 0
<br /> MW-1(56) 09/02/93 1036 4614 -3578 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 -30 58 150 22 26 45 31 NA No FP,No S,O-NE
<br /> j 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 46 14 19 4 2 NA No FP,No S,O=NE
<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 -3083 59 21 25 10 3 3 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 0
<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 37 57 -2721 59 34 15 15 4 9 NA No FP,No S,No 0
<br /> MW-1(56) 05/10/96 1036 35 04 -24 68 92 55 21 24 12 <3 No FP,No S,No 0
<br /> MW-1(56) 08/29/96 1036 3677 -2641 100 4 2 14 32 12 <3 No FP,No S,No 0
<br /> MW-1(56) 11/20/96 1036 3575 -2539 140 6 0 15 46 18 <3 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 -35 99 <50 <030 <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) 09/04/92 982 4936 -3954 <50 <0 50 <0 50 <0 50 <0 50 NA No FP,No S,Yes 0
<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 9 82 4384 -34 02 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-2(61) 09/02/93 9 82 4565 -3583 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-2(61) 12/16/93 9 82 4349 -33 67 <50 29 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> P 0 1110107
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