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<br /> Groundwater Monitoring Data
<br /> ARCO Service Station No. 2168, 441 Charter Way, Stockton, California _
<br /> Well Elevation Static Elevation Tap
<br /> Sample of Top Water of of Total
<br /> Number Date of Casing Level Groundwater Screen TPHG Benzene Toluene Eth lbenzene Xylenes MTBE Observations
<br /> MW-6
<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 08/22/96 891 2648 -17 55 98 000 8200 7 100 1,600 9A)0 <1,000** No FP, No S.Yc%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 12/01/94 988 3897 -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 05/17/95 880 3050 -2170 40,000 2,300 8,200 820 4,800 NA 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 NA No FP,No S,Yes 0
<br /> MW-7(48) 11/29/95 880 3056 -2176 45,000 2,100 6,400 800 3,600 NA No FP,No S,Yes 0
<br /> MW-7 02/27/96 880 2775 -1893 40,000 2,700 7,800 740 4,000 NA No FP,No S,Yes 0
<br /> MW-7(48) 05/15/96 880 26 13 -1733 38,000 2,500 7,300 790 4,100 <500* No FP,No S,Yes O
<br /> MW-7 08/22/96 880 2667 -1787 52,000 4,400 9,900 790 4,600 <500* No FP,No S,Yes 0
<br /> TBLB
<br /> TBLB 09/26/94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA
<br /> TBLB 12/01/94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA
<br /> TBLB 02/16/95 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA
<br /> A =Not applicable NS=Not sampled. NE=Not evaluated 0=Obvious product S=Sheen FP=Free product
<br /> Analytical results in pans per billion
<br /> Measurements in feet
<br /> HG=Total petroleum h}drocarbons as gasoline
<br /> Elevation datum is mean sea level
<br /> =Below detection limit for analytical methods used
<br /> •=Raised method reporting limit due to high analyte concentration requinng sample dilution
<br /> **=Raised method reporting]mut due to matrix interference
<br /> ample e s
<br /> MW-4(34)-Well iD and sample depth(feet)
<br /> W-24-MW3R-Water sample,sample de (feet),R=Rtnsate blank
<br /> N\XLS\0805V460T092696MI XLS Re%v;1on2 1011SM6
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