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<br /> Groundwater Monitoring Data Page 4 of 5
<br /> Former ARCO Service Station No, 2168, 441 Charter Way, Stockton, California
<br /> Well Elevation Static Elevation Top
<br /> Sample of Top Water of of Total
<br /> Number Date of Casing Level Groundwater Screen TPHG Benzene Toluene Et11 lbenzene Xylenes MTBE Observations
<br /> MW-5
<br /> MW-5 08/22/96 928 27 14 -17 86 58,000 8,700 8,200 880 4,500 <500* No FP,No S,Yes 0
<br /> MW-5 11/25/96 928 2733 -1805 53,000 7,000 6,100 800 4,000 <600** No FP,No S,Yes 0
<br /> MW-5 02/24/97 928 2330 -14 02 40,000 4,400 4,700 590 3,100 <700** No FP,No S,Yes 0
<br /> MW-6
<br /> MW-6(47) 10/28/93 893 3708 -28 15 300 93,000 15,000 20,000 1,600 11,000 NA No FP,No S,Yes 0
<br /> MW-6(41) 03/23/94 893 3761 -2868 79,000 11,000 14,000 1,500 9,300 NA No FP,No S,Yes 0
<br /> MW-6(41) 06/29/94 893 3692 -2799 60,000 11,000 15,000 1,000 8,300 NA No FP,S=NE,O=NE
<br /> MW-6(39) 09/26/94 893 38 15 -2922 92,000 7,500 13,000 1,100 6,800 NA No FP,S=NE,O=NE
<br /> MW-6 12/01/94 893 3836 -2943 Well Not SampiM No FP,S=Yes,O=NE
<br /> MW-6(47) 02/16/95 893 37 06 -28 13 39,000 6,400 5,200 850 4,400 NA No FP,No S,O=NE
<br /> MW-6(46) 05/17/95 893 3064 -2171 130,000 9,900 16,000 1,800 10,000 NA No FP,No S,O=NE
<br /> MW-6(46) 08/15/95 893 3022 -2129 120,000 7,700 9,700 1,500 8,900 NA No FP,No S,Yes 0
<br /> MW-6(45) 11/29/95 893 3030 -2137 160,000 8,200 11,000 1,700 10,000 NA No FP,No S,Yes 0
<br /> MW-6 02/27/96 893 2755 -1862 96,000 10,000 13,000 1,400 8,100 NA No FP,No S,Yes 0
<br /> MW-6(47) 05/15/96 893 2579 -1686 99,000 8,800 12,000 1,400 8,000 <900** No FP,No S,Yes 0
<br /> MW-6 08/22/96 893 2648 -1755 98,000 8,200 7,300 1,600 9,000 <1,000** No FP,No S,Yes 0
<br /> MW-6 11/25/96 893 2661 -17 68 84,000 9,300 9,500 1,500 8,800 <900** No FP,No S,Yes 0
<br /> MW-6 02/24/97 893 2277 -1384 140,000 9,700 11,000 I,400 8,500 <2,000** No FP,No S,Yes 0
<br /> MW-7
<br /> MW-7 10/28/93 888 38 11 -2923 300 42,000 31,000 9,300 970 6,000 NA No FP,No S,Yes 0
<br /> MW-7 03/23/94 888 3663 -2775 44,000 3,000 8,600 870 5,600 NA No FP
<br /> MW-7 06/29/94 888 3739 -2851 24,000 850 4,500 630 4,400 NA No FP,S=NE,O=NE
<br /> MW-7(39) 09/26/94 888 3867 -2979 46,000 1,600 6,400 610 4,200 NA No FP,S=NE,O=NE
<br /> MW-7 12/01/94 888 3887 -2999 24,000 800 5,700 560 4,500 NA No FP,No S,O=NE
<br /> MW-7 02/16/95 Well Inaccessible
<br /> MW-7 05/17/95 888 3050 -2162 40,000 2,300 8,200 820 4,800 NA No FP,No S,O=NE
<br /> MW-7(48) 08/15/95 888 3041 -2153 30,000 1,400 4,400 490 2,800 NA No FP,No S,Yes 0
<br /> MW-7(48) 11/29/95 888 3056 -2168 45,000 2,100 6,400 800 3,600 NA No FP,No S,Yes 0
<br /> MW-7 02/27/96 888 2775 -18 87 40,000 2,700 7,800 740 4,000 NA No FP,No S,Yes 0
<br /> MW-7(48) 05/15/96 888 26 13 -1725 38,000 2,500 7,300 790 4,100 <500* No FP,No S,Yes 0
<br /> MW-7 08/22/96 8 88 2667 -1779 52,000 4,400 9,900 790 4,600 <500* No FP No S,Yes 0
<br /> N VXLMOS\14601\040897M1 xis Rewsion 0 517/97
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