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Table 4:Summary of Analytical Data-Groundwater org ',Service 1600 Durham Ferry Road Tracy,California Project No.425.2 Summary of Groundwater Analytical Data Wells Date Benzene Toluene Ethyl Total TPH TEPH" MTBE DIPE ETBE TAME Tertiary Ethanol Benzene Xylenes Gasoline D,K,Di,M Butanol ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L uglL ug/L ug/L MWA 5/4195 45 40 8.0 60 470 NA NA N/A N/A N/A N/A N/A 9/13/96 24 1.0 6.0 10 186 ND<50 7• N/A N/A N/A N/A N/A 1/17/97 17 1.0 4.0 4.0 176 NA 9` N/A N/A N/A N/A N/A 5/5/97 47 2-0 2.0 13 331 ND<50 13/5.8[ N/A N/A N/A N/A N/A 9119197 12 0.6 2.0 6.0 75 N/A 2.8 ND<2 ND<2 ND<2 ND<100 ND<500 2/24/98 24 1.0 3.0 13 181 N/A 4.0 N/A N/A N/A I N/A N/A • 5/29198 5.0 ND<.3 2.0 1 2.0 ND<50 N/A ND<2 N/A N/A N/A N/A N/A 11/13/98 18 0.8 2.6 8.6 97 NIA ND<5 ND<5 ND<5 ND<5 ND<50 N/A 4/28/99 11 0.6 3.0 7.8 94 N/A ND<5 N/A N/A N/A N/A N/A 9/1/99 7 ND<0.3 0.7 5.4 ND<50 N/A ND<5 NIA N/A N/A N/A N/A 12/22/99 100 4.3 32 87 820 N/A N/A NIA N/A N/A N/A N/A 3/31/00 174 1.0 9 47 667 N/A 7• N/A N/A N/A N/A N/A 6/20/00 170 2 17 128 1300 N/A 2 N/A N/A N/A N/A N/A MW-2 5/4/95 40 57 11 55 630 NA NA N/A N/A N/A N/A N/A 9/13/96 FP FP FP FP FP FP FP N/A N/A N/A N/A N/A 1/17197 FP FP FP FP FP FP FP N/A N/A N/A N/A N/A 5/5/97 287 548 178 798 6.810 ND<50 ND<5 N/A N/A N/A N/A NIA 9/19/97 743 1,380 455 2,800 18,600 N/A ND<20 N13<20 ND<20 ND<20 D<1,00 0<5,000 2/24/98 384(FP) 507(FP) 112(FP) 574(FP) 4100(FP) N/A ND<2 N/A N/A N/A N/A N/A 5/29/98 2,800 5,220 2,200 14,600 334,000 N/A <200 N/A N/A N/A N/A N/A 11/13/98 450 730 360 2,000 6,400 N/A ND<5 ND<5 ND<5 ND<5 ND<50 N/A 4/28/99 2,600 2,400 970 4,300 40,000 N/A ND<5 N/A N/A N/A N/A N/A 9/1/99 10,000 12,000 11,000 44,000 890,000 N/A ND<10,000 N/A N/A N/A N/A N/A 12/22/99 1,400 3,500 11100 4,800 44,000 N/A N/A N/A N/A N/A N/A N/A 3/31/00 5,350 11,900 2,710 12,800 89,600 N/A 391• N/A N/A N/A N/A NIA 6/20/00 3,640 81280 2,160 9.600 84,800 N/A ND<200 N/A N/A N/A N/A N/A • MW-3 5/4/95 N/D N/D N/D N/D N/D N/A NA N/A N/A N/A N/A N/A 9/13/96 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<50 ND<5 N/A N/A NIA NIA N/A 1/17197 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<50 ND<5 N/A N/A N/A N/A N/A 5/5/97 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<50 ND<5 N/A NIA N/A N/A N/A 9/19/97 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 NIA ND<2 ND<2 ND<2 ND<2 ND<100 ND<500 2/24/98 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A ND<2 N/A N/A N/A N/A NIA 5/29/98 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A ND<2 N/A N/A N/A N/A N/A 11/13/98 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A ND<5 ND<5 ND<5 ND<5 ND<50 NIA 4/28/99 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A ND<5 N/A N/A N/A N/A N/A 9/1/99 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A ND<5 N/A N/A N/A N/A N/A 12/22/99 ND<.5 ND<.5 ND<.5 ND<.5 ND<50 N/A N/A N/A N/A NIA N/AI N/A 3/31/00 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A ND<2 N/A N/A N/A N/A N/A 6/20/00 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A ND<2 N/A NIA N/A N/A N/A yYakpvnl7iLSricrZnc. 8/17/00