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SEI • <br /> Groundwater Monitoring Data <br /> ARCO Service Station No 2186 <br /> 3212 North California Street, Stockton,California <br /> Elevation of Static Water[l] 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 ms)) (feet b s) feet b s) (feet rnsl) Flow Direction pob ppb ppb Ppb 2pb ppb Observations <br /> M W 2 11/2011997 5017 3468 E <50 <0 5 <0 5 <05 <0 5 <5 0 No FP,No S <br /> (Cont) 2/17/1998 4530 2991 E-SE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 6/24/1998 3669 -2120 E <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 9/21/1998 4031 -2482 E NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 12/14/1998 3828 2279 E-NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 3/31/1999 3524 -1975 N-NE <50 <0 5 0 781 <0 5 <0 5 <5 0 No FP,No S <br /> 6/11/1999 35 14 -1965 E-NE <50 <0 5 <0 5 <0 5 0 796 <5 0 No FP,No S <br /> 9/10/1999 3937 -2388 E NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 12/3/1999 3933 -2384 E <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP No S <br /> 4/3/2000 3590 2041 NE <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> 6/22/2000 3608 -2059 E <50 <2 0 <2 0 <2 0 2 16 <2 0[4] No FP,No S <br /> 9/27/2000 41 38 -2589 E NE <50 <0 5 <0 5 <0 5 <0 5 <2 0[4] No FP,No S <br /> 10/19/2000 4120 2571 E NE NA NA NA NA NA NA Not observed <br /> 12/20/2000 3923 2374 E-NE <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP No S <br /> 3/16/2001 38 14 -2265 E-NE <50 <0 5 <0 5 <0 5 <0 5 <2 0[4] No FP No S <br /> 6/21/2001 4094 2545 NE <50 <0 5 <0 5 <0 5 <0 5 <2 0[4] No FP No S <br /> 9/13/2001 4669 3120 E NE <50 <0 5 <0 5 <0 5 <0 5 <2 0[4] No FP No S <br /> 12/11/2001 4400 2851 NE <50 <0 50 <0 50 <0 50 <0 50 2 2[4] No FP,No S <br /> 3/14/2002 4090 -2541 E-NE <50 <0 50 <0 50 <0 50 <0 50 1 9[4] No FP,No S <br /> 6/19/2002 4311 2762 E NE <50 <0 50 <0 50 <0 50 <0 50 2 0[4] No FP No S <br /> 9/12/2002 5015 -3466— E-NE <50 <0 5 <0S <0 5 <0 5 <0 5 No FP,No S <br /> I <br /> MW-3 9/25/1995 1455 5790 55 3-74 3 -43 35 SE <50 <0 5 <0 5 <I 5 <0 5 NA No FP No S <br /> 10/23/1995 NM NM NA NA NA NA NA NA NM <br /> 12122/1995 5359 -3904 E <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 2/16/1996 4999 3544 E <50 <0 5 <0 5 <05 <0 5 NA No FP,No S <br /> 5/23/1996 45 19 -3064 E <50 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S <br /> 9119/1996 5326 -3971 NE <50 <05 <0 5 <0 5 <0 5 <3 0 No FP,No S <br /> 11/27/1996 5051 3596 SE <50 <0 5 <0 5 <0 5 <0 5 <3 0 No FP No S <br /> 3/21/1997 4197 -2742 SE <50 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S <br /> 5/22/1997 4361 -2906 E-NE <50 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S <br /> 8/20/1997 4943 -34 98 E-NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 11/20/1997 4882 3427 E <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 2/17/1998 4418 -2963 E-SE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 6/24/1998 3559 -2104 E <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 9/21/1998 3907 2452 E NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 12114/1998 3714 -2259 E-NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 3/31/1999 3422 -1967 N-NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 6/11/1999 3401 -1946 E-NE <50 <0 5 <05 <0 5 <0 5 <5 0 No FP No S <br /> 9/10/1999 38 10 -2355 E-NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP No S <br /> 12/311999 38 12 -2357 E <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP No S I <br /> 413/2000 3485 -2030 NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S <br /> 6/22/2000 3490 2035 ) <50 <2 0 <2 0 <2 0 <2 0 <2 0 4 No FP No S <br /> K 115 BP ARCO1021861Quuterlyl3_QTR 0212186 GWMR 3Q02 <br />