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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-5
<br /> W- 4-MW5 03/29/93 937 44 25 4200 -34 88 930 16 <0 5 19 97 NA No FP,No S,Yes 0
<br /> MW-5(61) 06/07/93 937 4338 -34 01 1,100 40 14 42 58 NA No FP,No S,Yes 0
<br /> MW-5(60) 09/02/93 9 37 4532 -3595 1,200 76 17 52 57 NA No FP,No S,Yes 0
<br /> MW-5(60) 12/16/93 9 37 43 03 -3366 820 34 14 39 41 NA No FP,No S,Yes 0
<br /> MW-5(39) 04/08/94 937 3999 -3062 4,800 640 68 670 800 NA No FP,No S,O=NE
<br /> MW-5 06/22/94 937 4054 -31 17 9,200 1,100 140 1,300 2,000 NA No FP,No S,O=NE
<br /> MW-5(43) 09/23/94 937 4278 -3341 2,700 400 31 150 310 NA No FP,No S,O=NE
<br /> MW-5(46) 12/02/94 937 4189 -3252 2,200 380 28 210 330 NA No FP,No S,O=NE
<br /> MW-5(60) 02/15/95 937 4028 -3091 6,700 420 87 620 1,100 NA No FP,No S,O=NE
<br /> MW-5(6I) 05/12/95 937 38 95 -29 08 5,000 560 110 400 600 NA No FP,No S,Yes 0
<br /> MW-5(60) 08/29/95 9 37 4007 -3070 5,700 410 150 310 590 NA No FP,No S,Yes 0
<br /> MW-5(61) 12/04/95 937 3863 -2926 1,200 55 11 83 92 NA No FP,No S,Yes 0
<br /> MW-5 02/02/96 937 3666 -27 29 270 7 6 15 11 9 8 NA No FP,No S,Yes 0
<br /> MW-5(60) 05/10/96 937 34 15 -2478 5,700 420 180 380 610 34 No FP,No S,Yes 0
<br /> MW-5(60) 08/29/96 937 3599 -2662 9,600 510 90 710 970 39 No FP,No S,Yes 0
<br /> MW-5(60) 11/20/96 937 34 83 -2546 4,500 210 93 310 510 *<50 No FP,No S,Yes 0
<br /> MW-5(60) 03/19/97 937 31 12 -2175 6,200 420 68 360 590 ***<60 No FP,No S,Yes 0
<br /> MW-6
<br /> MW-6(58) 12/16/93 895 4277 4000 -33 82 <50 <0 5 <0 6 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-6(39) 04/08/94 895 3973 -3078 28 48 3 9 3 9 22 NA No FP,No S,O=NE
<br /> MW-6 06/22/94 895 4031 -3136 <10 <0 3 <0 3 <0 3 <0 5 NA No FP,No S,O=NE
<br /> MW-6(43) 09/23/94 895 4239 -33 64 <50 <0 5 <05 <0 5 <0 5 NA No FP,No S,O=NE
<br /> MW-6(46) 12/02/94 895 4166 -3271 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE
<br /> MW-6(58) 02/15/95 8 95 40 02 -3107 <50 <0 5 <05 <0 5 <0 5 NA Na FP,No S,O=NE
<br /> MW-6(58) 05/12/95 895 3926 -2931 <50 <0 5 <0 5 <05 <0 5 NA No FP,No S,No 0
<br /> MW-6(59) 08/29/95 895 3991 -3096 *<52 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-6(58) 12/04/95 895 3838 -2943 *<70 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-6 02/02/96 895 36 38 -27 43 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-6(59) 05/10/96 895 33 88 -24 93 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No O
<br /> MW-6(59) 08/29/96 895 3566 -2671 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No O
<br /> N\xls\0805\140071041497M1 x1s Remion 1 4/19/97
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