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J v 1 <br /> {S <br /> i <br /> Ta <br /> Re 1 <br /> Page 6 of 6 <br /> Groundwater Monitoring Data <br /> Former ARCO Service Station No. 2168, 441 Charter Way, Stockton, California <br /> Well Elevation Statt=Elevation Top <br /> Sample of Top Water of of Total <br /> Number Date of Casing Level Groundwater Screen TPHG Benzene Toluene Eth lbenzene Xylenes MTBE[11 Observations <br /> W-7 <br /> MW-7 08/22/96 888 2667 -1779 52,000 4,400 9,900 790 4,600 <500* No FP,No S,Yes O <br /> MW-7 11/25/96 888 2687 -1799 52,000 3,500 9,100 8l0 4,700 <600** No FP,No S,Yes O <br /> MW-7 02/24/97 888 2289 -1401 25,000 1,300 3,700 500 2,200 X100** No FP,No S,Yes 0 <br /> MW-7 05/19/97 888 2277 -1389 19,000 970 2,800 390 1,700 <300* No FP,No S,Yes 0 <br /> MW-7(47) 08/21/97 888 2389 -1501 19,000 1,100 2,600 490 2,000 <500** No FP,No S,Yes 0 <br /> MW-7(48) 11/17/97 888 2491 -1603 2,300 120 190 20 100 <50 No FP,No S,No 0 <br /> A =Not applicable NS=Not sampled, NE=Not evaluated 0=Odor S=Sheen FP=Free product. <br /> Analytical results m parts per billion <br /> easurements m feet. <br /> HG=Total petroleum hydrocarbons as gasoline <br /> levation datum is mean sea level <br /> =Below detection limit for analytical methods used <br /> =Raised method reporting limit due to high analyte concentration requi mg sample dilution. <br /> **=Raised method mportmg limit due to matrix interference <br /> 111=MTBE was analyzed using USEPA Method 8020 <br /> MW-4(34)-Well ID and sample depth(feet) <br /> W-24-MW 3R-Water samplo,sam le (feet),R=Rmsate blank <br /> 1 <br /> fmcon <br /> N\X S\080N 461 N 21297M 1 XLS 2127198 <br /> Sheet I <br />