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<br /> Groundwater Monitoring Data
<br /> ARCO Service Station No. 2168, 441 Charter Way, Stockton, California
<br /> Well Elevation Static Elevation
<br /> Sample of Top Water of Total
<br /> Number Date of Casing Level Groundwater TPHG Benzene Toluene Eth lbenzene Xylenes MTBE Observations -
<br /> MW-4
<br /> MW-4 12/01/94 1234 4241 -3007 Well Not Sampled No FP,S=Yes,O=NE
<br /> 114W-4(58) 02/16/95 1234 3925 -2691 77,000 9,200 13,000 1,700 8,000 No FP,No S,0=NE
<br /> NIW-4(58) 05/17/95 1234 3465 -2231 89,000 11,000 17,000 2,100 9 900 No FP,No S,O=NE
<br /> N4W-4(59) 08/15/95 1234 3430 -2196 74,000 6,400 10 000 1,600 7,600 No FP,No S,Yes 0
<br /> MW-4(59) 11/29/95 1234 34 42 -2208 92,000 7,800 12,000 1,700 7,600 No FP,No S,Yes 0
<br /> MW-4 02/27/96 1234 3167 -1933 61,000 7,600 8,500 1,600 6,600 No FP,No S,Yes 0
<br /> A4W-4(58) 05/15/96 1234 3009 -1775 64,000 8,100 8,600 1,600 6,400 <500* No FP,No S,Yes 0
<br /> MW-5
<br /> MW-5 01/20/93 928 41 12 -3184 NS NS NS NS NS No FP,No S,Yes 0
<br /> MW-5 01/26/93 928 4077 -3149 NS NS NS NS NS No FP,No S,Yes 0
<br /> MW-5(55) 03/10/93 928 39 11 -29 83 49,000 9,200 6,600 830 4,200 No FP,No S, Yes 0
<br /> N4W-5(55) 06/10/93 928 3734 -2806 37,000 6,400 4,100 870 3,800 No FP, No S,Yes 0
<br /> I14W-5(55) 09/02/93 928 38 23 -2895 51,000 7,900 6,600 990 4,800 No FP,No S,Yes O
<br /> MW-5(55) 10/28/93 9 28 3846 -29 18 60,000 9,200 9,000 1,200 6,700 No FP,No S,Yes 0
<br /> MW-5(36) 03/23/94 928 37 97 -28 69 58,000 9,000 8,900 940 5,600 No FP,No S, Yes 0
<br /> MW-5(36) 06/29/94 928 3779 -2851 50,000 7,300 7,500 920 4,700 No FP,S=NE,O=NE
<br /> MW-5(40) 09/26/94 928 3905 -2977 76,000 7,300 8,200 770 4,200 No FP,S=NE,O=NE
<br /> MW-5 12/01/94 9 28 3922 -2994 110,000 8,700 9,200 800 4,800 No FP,S=No,O=NE
<br /> MW-5(39) 02/16/95 9 28 3578 -2650 180,000 8,500 15,000 2,200 12,000 No FP,No S,O=NE
<br /> N4W-5(5i) 05/17/95 928 3123 -2195 22,000 3,400 2,100 390 2,400 No FP,No S,O=NE
<br /> MW-5(55) 08/15/95 928 30 83 -2155 32,000 4,200 3,500 410 2,500 No FP,No S,Yes 0
<br /> MW-5(55) 11/29/95 928 3100 -2172 52,000 8,300 8,100 810 4,100 No FP,No S,Yes 0
<br /> MW-5 02/27/96 928 28 19 -1891 20,000 3,200 1,900 440 1,800 No FP,No S,Yes 0
<br /> MW-5(55) 05/15/96 928 2666 -1738 43,000 6,500 5,000 790 3,400 <500* No FP,No S,Yes 0
<br /> MW-6
<br /> MW-6(47) 10/28/93 893 37 08 -28 15 93,000 15,000 20,000 1,600 11,000 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 No FP,No S,Yes O
<br /> MW-6(41) 06/29/94 893 3692 -2799 60,000 11,000 15,000 1,000 8,300 No FP,S=NE,O=NE
<br /> MW-6(39) 09/26/94 893 38 15 -2922 92,000 7,500 I3,000 1,100 6,800 No FP,S=NE,O=NE
<br /> MW-6 12/01/94 893 3836 -2943 Well Not Sampled No FP,S=Yes,O=NE
<br /> A4W-6(47) 02/16/95 893 3706 -28 13 39,000 6,400 5,200 850 4,400 No FP,No S,O=NE
<br /> N VLS\0805V 4607\06199631 XLS Revision 2 7/30/96
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