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<br /> Table 1
<br /> Page 5 of 6
<br /> Groundwater Monitoring Data
<br /> Former ARCO Service Station No. 2168, 441 Charter Way, Stockton, California
<br /> ell Elevation Static Elevation Top
<br /> Sample of Top Water of of Total
<br /> Number Date of Cann Level Groundwater Screen TPHG Benzene Toluene Eth lbenzene Xylenes MTBE[1] Observations
<br /> IW-6
<br /> MW-6(47) 10/28/93 893 3708 -2815 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 O
<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 3815 -2922 92,000 7,500 13,000 1,100 6,800 NA No FP,S=NE,O=NE
<br /> MW-6 12/01/94 993 3836 -2943 Well Not Sampled No FP,S=Yes,O=NE
<br /> MW-6(47) 02/16/95 893 3706 -2813 39,000 6,400 5,200 850 4,400 NA No FP,No S,O=NE
<br /> W-6(46) 05/17/95 893 3064 -2171 130,000 9,900 16,000 1,800 10,000 NA No FP,No S,0=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 /> -6 08/22/96 893 2648 -1755 98,000 8,200 7,300 1,600 9,000 <1,QOQ** No FP,No S,Yes O
<br /> -6 11/25/96 893 2661 -1768 84,000 9,300 9,500 1,500 8,800 <900** No FP,No S,Yes 0
<br /> -6 02/24/97 893 2277 -1384 140,000 9,700 11,000 1,400 8,500 <2,000** No FP,No S,Yes 0
<br /> MW-6
<br /> MW-6 05/19/97 8 93 22 53 -13 60 69,000 7,900 5,000 1,200 7,700 <600* No FP,No S,Yes O
<br /> MW-6(45) 08/21/97 893 2365 -1472 86,000 7,400 4,000 1,300 7,400 <1,000** No FP,No S,Yes O
<br /> MW-6(41) 11/17/97 893 2470 -1577 42,000 5,400 2,100 1,100 6,600 <2,000** No FP,No S,Yes 0
<br /> W-7
<br /> MW-7 10/28/93 888 3811 -2923 300 42,000 31,000 9,300 970 6,000 NA No FP,No S,Yes O
<br /> MW-7 03/23/94 888 3663 -2775 44,000 3>000 8,600 870 5,600 NA Na 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 8 88 30 50 -21 62 40,000 2,300 8,200 820 4,800 NA No FP,No S,O=NE
<br /> MW-7(48) Q8115195 8 88 30 41 -21 53 30,000 1,400 4,400 490 2,800 NA No FP,No S,Yes 0
<br /> MW-7{48) 11/29/95 8 88 30 56 -2168 45,000 2,100 6,400 800 3,600 NA No FP,No S,Yes O
<br /> MW-7 02/27/96 8 88 27 75 -18 87 4D,000 2,700 7,800 740 4,000 NA No FP,No S,Yes 0
<br /> MW-7(48) 05/15/96 888 2613 -1725 38,000 2,500 7,300 790 4,100 <500* No FP,No S,Yes 0
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<br /> NVnW805\1461W21297MI XLS 2127198
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