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APPENDIX D(Continued) <br /> HISTORICAL GROUNDWATER ANALYTICAL DATA <br /> USA STATION 4110 <br /> STOCKTON,CALIFORNIA <br /> Well ID Date TPH G TPH D Benzene Toluene Ethyl- Xylene Total MTBE <br /> Sampled benzene Lead <br /> (ug/1) (mg/1) (ug/1) (ug/1) (ug/1) (ug/1) (mll) (ug/1) <br /> MW-6P 10/10/95 ND(50) ND(10) ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 002) NA <br /> 01/18/96 ND(50) ND(0 05) 43 65 078 48 ND(0 002) NA <br /> 04/26/96 ND(50) ND(0 05) ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 002) NA <br /> 07/19/96 ND(50) ND(0 05) ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 003) ND(5 0) <br /> 10/30/96 ND(50) ND(0 05) ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(0 002) ND(5 0) <br /> 01/24/97 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA NA <br /> 04/21/97 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA ND(5 0) <br /> 07/30/97 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA NA <br /> 10/31/97 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA NA <br /> 01/22/98 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA NA <br /> 04/16/98 57 NA 073 3 9 ND(0 5) 2 5 NA ND(5 0) <br /> 07/17/98 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA ND(5 0) <br /> 10/20/98 »_-- ___.- ----- ----- ----- ----- ----- ----- <br /> MW-1 01/24/97 1,100 NA 0 82 25 18 3 1 NA NA <br /> 04/21/97 1,400 NA 24 13 16 57 NA ND(5 0) <br /> 07/30/97 1,200* NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA NA <br /> L0/31/97 11800 NA 0 6 18 14 5 0 NA NA <br /> 01/22/98 1,100 NA 23 13 087 18 NA NA <br /> 04/16/98 430 NA ND(0 5) 20 ND(0 5) 2 2 NA ND(5 0) <br /> 07/17/98 520 NA ND(0 5) 99 058 13 NA ND(5 0) <br /> 10/20/98 220 NA 0 66 4 8 ND(0 5) 068 NA ND(5 0) <br /> MW-2 01/24/97 74 NA ND(0 5) 7 0 ND(0 5) ND(0 5) NA NA <br /> 04/21/97 190 NA ND(0 5) 5 2 ND(0 5) ND(0 5) NA ND(5 0) <br /> 07/30/97 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA NA <br /> 10/31/97 NS NS NS NS NS NS NS NS <br /> 01/22/98 140 NA ND(0 5) 51 ND(0 5) ND(0 5) NA NA <br /> 04/16/98 71 NA ND(0 5) 3 3 ND(0 5) ND(0 5) NA ND(5 0) <br /> 07/17/98 56 NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA ND(5 0} <br /> 10/20/98 ND(50) NA ND(0 5) ND(0 5) ND(0 5) ND(0 5) NA ND(5 0} <br /> TPH G Total petroleum hydrocarbons in the gasoline range NS Not sampled <br /> TPH D Total petroleum hydrocarbons in the diesel range NA Not analyzed <br /> MTBE Methyl-tert-butyl-ether ( ) Method detection Limit <br /> ug/l Micrograms per liter <br /> mg/l Milligrams per liter <br /> ND Not detected at the method detection limit <br /> * Unknown hydrocarbon present in the TPH G range <br /> ** Resampled,assumption that MW-3 and MW-6 were switched on October 20, 1998 <br /> G IDATA150071HistGW-Anal Data wb3 <br />