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TA 1 *60(6 <br /> Groundwater Monitoring Data <br /> ARCO Service Station No 2186 <br /> 3212 North California Street, Stockton, California <br /> Elevation of Static Water[I I Screen Elevation of Total <br /> Well Top of Casing Level Interval Groundwater Groundwater TPHG Benzene Toluene Ethylbenzene Xylenes MTBE[3] <br /> Sample No Date (feet msl) (feet bgs) (feet bgs) (feet msl) Flow Direction i.LgA 49/1 µgti µgIl µg11 µ9l1 Observations <br /> VW 3B 9/27/2000 4081 -2580 ENE NS NS NS NS _ NS NS No FP No S <br /> (cont) 10/19/2000 4064 -25 63 ENE NS NS NS NS NS NS No FP,No S <br /> 12/20/2000 3871 -2370 ENE <50 <0 5 <05 <0 5 <05 26 5[4] No FP,No S <br /> 3/16/2001 3760 -2259 ENE <50 <05 <05 <0 5 <05 9 12[4] No FP,No S <br /> 6/21/2001 4043 -2542 NE <1 000** 97 53 290 750 5 000[41 No FP No S <br /> 09/13/01 [8] 4619 -31 18 E-NE <50 <05 <0 5 <05 <05 90[4] No FP,No S <br /> 1211 U2001 4341 -2840 NE <50 <050 <050 <0 50 <050 200[41 No FP,No S <br /> 3/14/2002 4037 -2536 E NE <50 <050 <050 <0 50 <050 26[4] No FP,No S <br /> 6/19/2002 4271 -2770 E NE 460[7] <050 <050 <0 50 <050 1,500[4] No FP,No S <br /> 9/12/2002 4960 -3459 ENE 320 <2 5 <25 <2 5 <25 140 No FP No S <br /> 12/3/2002 46 60 -3159 E-NE <500 <5 0 <50 <50 <50 69 No FP,No S <br /> Notes <br /> ms1=mean sea level TPHg=Total petroleum hydrocarbons as gasoline *=Raised MRL due to high analyte concentration requiring sample dilution <br /> bgs=below ground surface MtBE=Methyl tert-butyl ether **=Reporting limit raised due to matrix interference <br /> [i]Measured below top of casing <=Below detection limit for the analytical method used <br /> Notes (Cont) <br /> [2]Measured from ground surface FP=Free product Measured in feet <br /> [3]MTBE was analyzed using USEPA Method 8020 S=Sheen <br /> [4]MTBE was analyzed using USEPA Method 8260 NM=Not measured <br /> [5]Chromatogram Pattern Weathered Gasoline C6-C-12 NA=Not analyzed <br /> [6]Sample analyzed outside USEPA recommended hold ume NS=Not sampled <br /> [7]Hydrocarbon pattern is present in the requested fuel quantitation range,but does not resemble the pattern of the requested fuel <br /> [8]On the chain-of custody forms,samples were identified as MW-1B,MW-2B,and MW-3B,respectively <br /> K u5 BP ARM0218aQuarterlyw QTR 0W186 GWMR 4Q02 <br />