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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-4(cont)
<br /> MW-4 02/02/96 1157 3854 -2697 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-4(63) 05/10/96 1157 3602 -2445 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> MW4(63) 08/29/96 1157 3760 -2603 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> MW4(63) 11/20/96 1157 3671 -2514 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> MW-4(63) 03/19/97 1157 3308 -2151 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> MW4 05/27/97 1157 3321 -2164 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> MW-4(62) 08/12/97 1157 3445 -2288 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0
<br /> MW-5
<br /> W-44-MW5 03/29/93 937 4425 4200 -3488 930 16 <0 5 19 97 NA No FP,No S,Yes 0
<br /> MW-5(61) 06/07/93 937 4338 -3401 1,100 40 14 42 58 NA No FP,No S,Yes 0
<br /> MW-5(60) 09/02/93 937 4532 -3595 1,200 76 17 52 57 NA No FP,No S,Yes 0
<br /> MW-5(60) 12/16/93 937 4303 -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 -3117 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(61) 05/12/95 937 3895 -2908 5,000 560 110 400 600 NA No FP,No S,Yes 0
<br /> MW-5(60) 08/29/95 937 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 -2729 270 76 15 11 98 NA No FP,No S,Yes 0
<br /> MW-5(60) 05/10/96 937 3415 -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 3483 -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-5 05/27/97 937 3119 -2182 4,500 490 59 230 350 97 No FP,No S,Yes 0
<br /> MW-5(60) 08/12/97 937 3276 -2339 3,600 260 12 260 350 110 No FP,No S,Yes 0
<br /> MW-6
<br /> MW-6(58) 12/16/93 895 4277 4000 -3382 <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 39 39 22 NA No FP,No S,O=NE
<br /> N\xis\08M14007\093097M1 XLS Emcon
<br /> Sheet 1 10/1/97
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