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' TABLE 2(Continued) <br />' GROUNDWATER ANALYTICAL DATA <br /> USA STATION#110 <br /> STOCKTON,CALIFORNIA <br />' Well ID Date TPH G TPH D Benzene Toluene Ethyl- Xylene Total MTBE <br /> Sampled benzene Lead <br /> (ug1l) (mom) (yl!fi (ug/1) (ug/1) (ug/1) (mom) (ug/1) <br />' MW-1 01/24/97 1100 N 82 <br /> , A 0. 25 1.8 3.1 NA NA <br /> 04/21/97 1,400 NA 2.4 13 1.6 5.7 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 /> 10/31/97 1,800 NA 0.6 18 1.4 5.0 NA NA <br /> 01/22/98 1,100 NA 2.3 13 0.87 1.8 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) 9.9 0.58 1.3 NA ND(5.0) <br /> 10/20/98 220 NA 0.66 4.8 ND(0.5) 0.68 NA ND(5.0) <br /> 01/21/99 400 NA ND(0.5) 6.3 ND(0.5) 0.64 NA 300 <br /> 04/30/99 380 NA 1.0 13 1.5 1.4 NA 130 <br /> 07/07/99 750 NA 0.71 19 1.9 3.1 NA 64 <br /> 10/21/99 260 NA ND(0.5) 5.6 ND(0.5) 1 NA 81 <br /> 01/13/00 I60 NA ND(0.5) 7.4 ND(0.5) ND(0.5) 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) 5.1 ND(0.5) ND(0.5) NA NA <br /> 04/16/98 71 NA ND(0.5) 3.3 ND(0.5) N1)(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 /> 01/21/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) <br /> 04/30/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) <br /> 07/07/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) <br /> 10/21/99 64 NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) <br /> 01/13/00 1. 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 <br /> TPH D Total petroleum hydrocarbons in the diesel range <br /> MTBE Methyl-tert-butyl-ether <br /> ug/l Micrograms per liter <br /> mg/l Milligrams per liter <br /> ND Not detected at the method detection limit <br />' NS Not sampled <br /> NA Not analyzed <br /> ( ) 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:0ata1GW-ANLY.wb3 <br /> 1 <br />