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TABLE 2 <br /> HISTORICAL ANALYTICAL RESULTS -GROUNDWATER-GRAB SAMPLES <br /> San Joaquin County Agricultural Commissioner's Office <br /> 503 East 10th Street,Tracy, California <br /> SAMPLE DATE SAMPLE ETHYL- <br /> LOCATION SAMPLED SAMPLE ID DEPTH (FT) TPH-D TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE <br /> SBA 12/19/97 SB-1-GW 7 1,200 22,000 290 2,000 970 4,900 60 <br /> SB-2 12/19/97 SB-2-GW 7 NA NA NA NA NA NA NA <br /> SB-3 12/19/97 SB-3-GW 7 1,300,000 140,000 11,000 18,000 3,600 18,000 400 <br /> SB-4 12/99/97 SB-4-GW 7 330 60 0.6 1.5 0.6 3 ND<5 <br /> SB-5 12/22/97 SB-5-GW 7 1,800 440 23 ND<0.5 8 14 ND<5 <br /> SB-6 12/19/97 SS-6-GW 7 1,100 1,000 9.4 63 26 140 ND<5 <br /> SB-7 12/22/97 SB-7-GW 7 210 60 ND<0.5 ND<0.5 ND<0.5 ND<2 ND<5 <br /> SB-8 12/22/97 SB-8-GW 7 4,100 1,400 0.6 ND<0.5 1.6 ND<2 ND<5 1 <br /> SB-9 12/22/97 SB-9-GW 7 120 90 ND<0.5 ND<0.5 ND<0.5 ND<2 ND<5 <br /> SB-10 12/19/97 SB-10-GW_I_ 130 50 ND<0.5 1.4 0.6 3 ND<5 <br /> IL 8B-11 12/19/97 SB-11-GW 1 7 170 200 ND-1:0.5 2.2 2.2 12 ND<5 <br /> NOTES: All results are reported in microgramslliter which translates to parts per billion(ppb) <br /> Sample depths are in feet(FT)below ground surface <br /> Total Petroleum Hydrocarbons as Diesel(TPH-D)and Total Petroleum Hydrocarbons as Gasoline(TPH-G)analyses by Modified EPA Method 8015 <br /> Benzene,toluene,ethylbenzene,xylenes and Methyl tertiary butyl ether(MTBE)analysis by Modified EPA Method 8020 <br /> ND<0.5=Not Detected at reporting limit of 0.5 ppb <br /> NA=Not Analyzed <br />