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TABLE I GROUNDWATER ANALYTICAL RESULTS ROKEN ENGINEERING SERVICES <br /> GW - 1 2 3 4 5 6 7 8 9 10 11 12 ESLs <br /> EPH (mg/L) <br /> DRO (C13-C28) ND 1 .2 ND 149 0.59 2.9 20 15 23 29 2.6 ND 210 <br /> MORO (C29•C40) 1 .0 ND NO ND ND ND ND ND ND ND ND ND 210 <br /> METALS (µg/L) <br /> Lead ND ND ND ND NO NO 59 ND 58 150 NO ND 2.5 <br /> Nickel NO ND ND 66 NO NO NO NO ND NO NO ND 8.2 <br /> Zinc ND ND ND 51 NO ND NO ND NO ND NO ND 81 <br /> VOCs (gg/L) <br /> n-Butylbenzene NO 3.4 NO 40 ND 55 400 440 67 120 57 ND NA ' <br /> sec-Butylbenzene NO NO ND ND ND ND 3 .2 9. 1 5.4 2.2 ND NO NA <br /> Chloroethane ND NO NO ND ND NO 1 .6 1 .6 1 .4 8 .5 ND NO 12 <br /> 4-Chlorotoluene ND ND ND ND ND 12 ND ND ND ND 13 ND NA <br /> 1 ,2-Dibromoethane ND ND ND ND NO ND ND ND 26 ND ND ND 150 <br /> 1,2 Dichloroethane ND NO NO NO ND 140 180 44 430 580 130 ND 200 <br /> lsopropylbenzene ND 3.2 NO 33 ND 38 220 190 28 120 39 ND NA <br /> p-isopropyltoluene NO NO ND 12 ND it 100 29 34 92 12 NO NA <br /> Naphthalene ND 4.8 ND 130 ND 200 710 740 370 460 180 ND 24 <br /> n-propylbenzene NO 4.9 NO 50 ND 120 470 560 170 240 110 ND NA <br /> Styrene ND ND ND ND ND 1 .7 ND ND ND ND 1 .8 ND 100 <br /> 1 ,3,5-Trimethylbenzene NO 1 .7 ND 200 ND 100 1000 1000 380 540 240 ND NA <br /> 1 ,2,4-Trimethylbenzene NO 1 .7 ND 760 ND 1000 16000 11000 1500 5000 930 ND NA <br /> Benzene ND 35 ND 1000 ND 6500 19000 15000 9100 10000 5700 ND 46 <br /> Toluene ND 3 .4 ND 200 NO 980 23000 17000 11000 14000 970 ND 130 <br /> Ethylbenzene ND 11 ND 280 NO 1100 1900 2000 1400 1400 950 ND 43 <br /> m,p-Xylene NO 6.8 ND 2100 ND 2200 25000 13000 9600 10000 2000 ND 100 <br /> o-Xylene NO 1 .8 ND 260 ND 860 9900 5500 2800 3000 820 NO 100 <br /> Di-isopropyl ether ND ND ND NO ND 3 .8 NO ND ND ND 3 .4 ND NA <br /> GRO (C6-C12) ND 3500 ND 29000 NO 37000 910000 200000 110000 150000 34000 ND 210 <br /> GW- 1 Groundwater Sample Location ESLs Environmental Screening Levels — Interim Final November 2007 (Rev. May 2008) <br /> EPH Extractable Petroleum Hydrocarbons Table F- ib Groundwater Screening Levels <br /> mg/L Milligrams per Liter (parts per million) (groundwater is not a current or potential drinking water source) <br /> DRO Diesel Range Organics <br /> MORO Motor Oil Range Organics ND Not detected above the laboratory method reporting limit <br /> µg/L Micrograms per Liter (parts per billion) NA Not Available <br /> VOCs Volatile Organic Compounds <br /> GRO Gasoline Range Organics NOTE: BOLD indicates detected compound concentration exceeds ESL. <br /> PAGE 1 of 2 <br />