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TABLE 4 <br /> GROUNDWATER ANALYTICAL RESULTS-TPH-DIESEL <br /> QUARTERLY GROUNDWATER MONITORING <br /> FORMER AMERICAN FOREST PRODUCTS <br /> STOCKTON,CALIFORNIA <br /> Well Location <br /> DMW-1 DMW-2 DMW-3 DMW-4 DMW-5 DMW-6 DMW-7 <br /> Date TPH-D UH TPH-D UH TPH-D UH TPH-b I UH TPH-D I UH TPH-D UH TPH D UH <br /> 811190 <50 NA <50 NA <50 NA <50 NA <br /> 12/15/90 <50 NA <50 NA <50 NA <50 NA <br /> 3/13/91 <50 NA <50 NA <50 NA <50 NA <br /> 7/30/91 <50 NA I <50 NA <50 NA <50 NA <br /> 5113194 <50 NA <50 NA <50 NA <50 NA <br /> 5/2/95 <50 NA <50 NA <50 NA <50 180 <br /> 5/26/95 <50 NA NA NA NA NA <50 NA <50 INA <br /> 9/6(96 <50 <50 <50 <50 <50 <50 <50 <50 <50 <br /> 7/11197 <50 <50 <50 <50 <50 <50 <50 <50 <50 <br /> 7/23198 <50 <50 <50 <50 <50 <50 <50 <50 <50 <br /> 12/18/98 NA NA NA NA NA NA NA NA NA <50 480 <50 180 <br /> 3/18199 NA NA NA NA NA NA NA NA NA <50 380 <50 82 <br /> 617/99 NA NA NA NA NA NA NA NA NA NA <50 540 <50 250 <br /> 9/9/99 <50 1101 <50 1201 <50 1701 <50 1201 <200 <200 <50 780 <50 660 <br /> 12/20/99 <50 <50 <50 <50 <50 901 <50 <50 <50 <50 <50 420 <50 390 <br /> 2/28/00 <50 <50 <50 531 <50 53 <50 551 <50 <50 <50 110 <50 87 <br /> 5/26100 <50 <50 <50 <50 <50 <50 <60 <50 <50 <50 <50 53 <50 74 <br /> 8/25/00 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <br /> 11/151001 <50 2901 <50 <50 <50 1301 <50 1901 <50 1401 440 NA <50 430 <br /> 3/11/011 <50 160 <50 <50 <50 610 <50 92 <50 1 <50 290 NA 1 <50 180 <br /> Concentrations in ug/L <br /> NA=not analyzed <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel <br /> UH=unknown hydrocarbons not corresponding to the diesel standard <br /> 1)Unknown hydrocarbon pattern does not match the weathered diesel pattern <br /> The Northwest Cleanup method with silca gel was used for samples collected on 12/99,2100,5100 and 8100 <br /> Dmwdata 111 7119101 <br />