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Laboratories, Inc. <br />Steamboat Sorinas. CO 80487 !8001 334-5493 <br />Twentymile Coal Co. ACZ Project ID: L28772 <br />2-BUTANONE <br />50.1 <br />49.51 <br />u91L <br />99.0 <br />70 <br />130 <br />3 20 <br />2-CHLOROTOLUENE <br />24.7 <br />25.31 <br />u9/L <br />103.0 <br />70 <br />130 <br />1 20 <br />2-HEXANONE <br />50 <br />53.47 <br />ug/L <br />107.0 <br />70 <br />130 <br />2 20 <br />4-CHLOROTOLUENE <br />24.7 <br />25.41 <br />ug/L <br />103.0 <br />70 <br />130 <br />0 20 <br />44SOPROPYLTOLUENE <br />25 <br />25.6 <br />ug/L <br />102.0 <br />70 <br />130 <br />2 20 <br />4-METHYL-2-PENTANONE <br />50 <br />50.07 <br />ug/L <br />100.0 <br />70 <br />130 <br />3 20 <br />ACETONE <br />50 <br />42 <br />ug/L <br />84.0 <br />70 <br />130 <br />7 20 <br />ACRYLONITRILE <br />25 <br />24.76 <br />ug/L <br />99.0 <br />70 <br />130 <br />3 20 <br />BENZENE <br />25 <br />22.82 <br />ug/L <br />91.0 <br />70 <br />130 <br />1 20 <br />BROMOBENZENE <br />25.1 <br />25.34 <br />ug/L <br />101.0 <br />70 <br />130 <br />0 20 <br />BROMOCHLOROMETHANE <br />24.9 <br />23.64 <br />ug/L <br />95.0 <br />70 <br />130 <br />1 20 <br />BROMODICHLOROMETHANE <br />24.6 <br />23.8 <br />ug/L <br />97.0 <br />70 <br />130 <br />1 20 <br />BROMOFORM <br />25.2 <br />25.02 <br />ug/L <br />99.0 <br />70 <br />130 <br />0 20 <br />BROMOMETHANE <br />25 <br />22.27 <br />ug/L <br />89.0 <br />70 <br />130 <br />0 20 <br />CARBON DISULFIDE <br />25.3 <br />21.86 <br />ug/L <br />86.0 <br />70 <br />130 <br />1 20 <br />CARBON TETRACHLORIDE <br />25.1 <br />22.66 <br />ug/L <br />90.0 <br />70 <br />130 <br />0 20 <br />CHLOROBENZENE <br />24.8 <br />24.59 <br />ug/L <br />99.0 <br />70 <br />130 <br />0 20 <br />CHLOROETHANE <br />25 <br />22.63 <br />ug/L <br />90.0 <br />70 <br />130 <br />1 20 <br />CHLOROFORM <br />25 <br />23.13 <br />ug/L <br />92.0 <br />70 <br />130 <br />0 20 <br />CHLOROMETHANE <br />25.1 <br />21.73 <br />ug/L <br />86.0 <br />70 <br />130 <br />3 20 <br />CIS-1,2-DICHLOROETHENE <br />25 <br />23.2 <br />ug/L <br />93.0 <br />70 <br />130 <br />1 20 <br />CIS-1,3-DICHLOROPROPENE <br />25.1 <br />23.89 <br />ug/L <br />95.0 <br />70 <br />130 <br />1 20 <br />DIBROMOCHLOROMETHANE <br />24.9 <br />25.34 <br />ug/L <br />102.0 <br />70 <br />130 <br />0 20 <br />DIBROMOMETHANE <br />25 <br />22.84 <br />ug/L <br />91.0 <br />70 <br />130 <br />0 20 <br />DICHLORODIFLUOROMETHANE <br />24.9 <br />21.33 <br />ug/L <br />86.0 <br />70 <br />130 <br />2 20 <br />ETHYLBENZENE <br />25 <br />24.46 <br />ug/L <br />98.0 <br />70 <br />130 <br />1 20 <br />HEXACHLOROBUTADIENE <br />24.9 <br />26 <br />ug/L <br />104.0 <br />70 <br />130 <br />0 20 <br />ISOPROPYLBENZENE <br />25 <br />24.71 <br />ug/L <br />99.0 <br />70 <br />130 <br />1 20 <br />M P XYLENE <br />49.8 <br />48.81 <br />ug/L <br />98.0 <br />70 <br />130 <br />1 20 <br />METHYL TERT BUM ETHER <br />25 <br />23.44 <br />ug/L <br />94.0 <br />70 <br />130 <br />0 20 <br />METHYLENE CHLORIDE <br />25.1 <br />22.69 <br />ug/L <br />91.0 <br />70 <br />130 <br />1 20 <br />NAPHTHALENE <br />25.1 <br />26.4 <br />ug/L <br />105.0 <br />70 <br />130 <br />0 20 <br />N-BUTYLBENZENE <br />25.1 <br />26.12 <br />ug/L <br />104.0 <br />70 <br />130 <br />1 20 <br />N-PROPYLBENZENE <br />25 <br />25.4 <br />ug/L <br />101.0 <br />70 <br />130 <br />2 20 <br />O XYLENE <br />25 <br />24.42 <br />ug/L <br />98.0 <br />70 <br />130 <br />1 20 <br />SEC-BUTYLBENZENE <br />25 <br />25.69 <br />uglL <br />103.0 <br />70 <br />130 <br />2 20 <br />STYRENE <br />25.1 <br />25.02 <br />ug/L <br />100.0 <br />70 <br />130 <br />0 20 <br />TERT-BUTYLBENZENE <br />25 <br />25.42 <br />ug/L <br />102.0 <br />70 <br />130 <br />2 20 <br />TETRACHLOROETHENE <br />25.4 <br />24 <br />ug/L <br />95.0 <br />70 <br />130 <br />2 20 <br />TOLUENE <br />25.1 <br />24.11 <br />ugIL <br />96.0 <br />70 <br />130 <br />1 20 <br />TRANS-I,2-DICHLOROETHENE <br />25 <br />22.58 <br />ug/L <br />90.0 <br />70 <br />130 <br />1 20 <br />TRANS-I,3-DICHLOROPROPENE <br />25.1 <br />25.6 <br />ug/L <br />102.0 <br />70 <br />130 <br />1 20 <br />TRICHLOROETHENE <br />24.8 <br />22.8 <br />ug/L <br />92.0 <br />71 <br />130 <br />1 20 <br />TRICHLOROFLUOROMETHANE <br />25 <br />22.37 <br />ug/L <br />89.0 <br />70 <br />130 <br />3 20 <br />VINYL ACETATE <br />25.3 <br />24.85 <br />ug/L <br />98.0 <br />70 <br />130 <br />3 20 <br />VINYL CHLORIDE <br />25.2 <br />21.92 <br />ug/L <br />87.0 <br />70 <br />130 <br />3 20 <br />BROMOFLUOROBENZENE (surf) <br />% <br />98.2 <br />70 <br />130 <br />DIBROMOFLUOROMETHANE (surr) <br />% <br />101.1 <br />70 <br />130 <br />TOLUENE -D8 (surr) <br />% <br />105.2 <br />70 <br />130 <br />L28772-1602081201 Page 18 of 36 <br />