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<br /> Groundwater Monitoring Data Page 3 of 4
<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 ]benzene Xylenes
<br /> Observations
<br /> MW
<br /> MW-5(36) 03/23/94 929 37 97 2869 58,000 9,000 8,900 940 5 600 No FP,No S Yes 0
<br /> MW-5(36) 06/29/94 928 37 79 -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 8200 770 4,200 No FP,S=NE,O=NE
<br /> MW-5 12/01/94 928 3922 -2994 110,000 8,700 9,200 800 4,800 No FP,S=No,O=NE
<br /> MW-5(39) 02/16/95 928 3578 -2650 180,000 8,500 15,000 2,200 12,000 No FP No S,O=NE
<br /> MW-5(55) 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 9 28 3083 -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 9 28 28 19 -1891 20,000 3,200 1,900 440 1,800 No FP,No S,Yes O
<br /> MW-6
<br /> MW-6(47) 10/28/93 893 3708 -2815 93 000 15 000 20,000 1,600 11,000 No FP,No S,Yes 0
<br /> MW 6(41) 03/23/94 893 37 61 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 0=NE
<br /> MW-6(39) 09/26/94 893 38 15 -2922 92,000 7,500 13,000 1,100 6,800 No FP,S=NE,O=NE
<br /> MW-6 12/01/94 893 3836 -2943 Well Not Sampled jNo FP,S=Yes,O=NE
<br /> MW-6(47) 02/16/95 893 37 06 -28 13 39,000 6,400 5200 850 4,400 No FP No S,O=NE
<br /> MW-6(46) 05/17/95 8 93 3064 -2171 130,000 9,900 16,000 1,800 10,000 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 No FP,No S,Yes O
<br /> MW-6(45) 11/29/95 893 3030 -2137 160 000 8,200 11000 1,700 10 000 No FP No S,Yes 0
<br /> MW-6 02/27/96 893 27 55 -1862 1 96 000 10 000 13,000 1 400 8 100 No FP No S,Yes 0
<br /> MW7
<br /> MW-7 10/28/93 888 38 11 2923 42,000 31,000 9,300 970 6,000 No FP,No S,Yes O
<br /> MW-7 03/23/94 8 88 36 63 -2775 44,000 3,000 8,600 870 5,600 No FP
<br /> MW-7 06/29/94 988 37 39 -2851 24,000 850 4,500 630 4,400 No FP,S=NE,O=NE
<br /> MW-7(39) 09/26/94 888 3967 -2979 46,000 1,600 6,400 610 4,200 No FP,S=NE,O=NE
<br /> -7 12/01/94 888 3887 -2999 24,000 800 5,700 560 4,500 No FP,No S 0=NE
<br /> MW-7 02/16/95 880 Well Inaccessible
<br /> MW-7 05/17/95 880 3050 2170 40,000 2,300 8,200 820 4,800 No FP,No S,O=NE
<br /> MW-7(48) 08/15/95 880 3041 -2161 30,000 1,400 4 400 490 2 800 No FP,No S,Yes O
<br /> MW-7(48) 11/29/95 880 3056 -2176 45,000 2 100 6,400 800 3,600 No FP,No S Yes O
<br /> MW-7 02/27196 880 2775 -1895 "I 40,000 2,700 7,800 740 4,000 No FP,No S,Yes O
<br /> N\XLS\0805V 4607\053096S 1 XIS Revision 15130196
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