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88 Empire Drive <br />St Paul, MN 55103 <br />Tel: 651-642-1150 <br />Fax: 651-642-1239 <br />Liesch Associates, Inc. Project: Former Elk River Dump <br />1340015th Avenue North, Suite A Project Number. 79019.00 Work Order* 1002261 <br />Plymouth, MN 55441 Project Manager: Mr. Tom Johnson Date Reported: 06/29/10 <br />VOC 8260B - Quality Control <br />Legend Technical Services, Inc. <br />Spike Source %REC %RPD <br />Analyte Result RL MDL Units Level Result %REC Limits %RPD Limit Notes <br />Batch BOF1608 - EPA 5030 Water (Purge and Trap) <br />Blank (BOF1608-BLK1) <br />Prepared & Analyzed: 06/16/10 <br />cis-1,3-Dichloropropene <br />< 1.0 <br />1.0 <br />0.18 <br />ug/L <br />Dibromochloromethane <br />< 2.5 <br />2.5 <br />0.26 <br />ugA- <br />Dibromomethane <br />< 2.5 <br />2.5 <br />0.24 <br />ug/L <br />Dichlorodifluoromethane <br />< 5.0 <br />5.0 <br />0.25 <br />ug/L <br />Dichlorofluoromethane <br />< 1.0 <br />1.0 <br />0.21 <br />ug/L <br />Ethyl ether <br />< 5.0 <br />5.0 <br />0.27 <br />ug/L <br />Ethylbenzene <br />< 1.0 <br />1.0 <br />0.28 <br />ug/L <br />Hexachlorobutadiene <br /><10 <br />10 <br />0.42 <br />ug/L <br />Isopropylbenzene <br />< 1.0 <br />1.0 <br />0.12 <br />ugA- <br />m,p-Xylene <br /><2.0 <br />2.0 <br />0.57 <br />ug/L <br />Methyl isobutyl ketone <br />< 5.0 <br />5.0 <br />0.40 <br />ug/L <br />Methyl tert-butyl ether <br />< 1.0 <br />1.0 <br />0.16 <br />ug/L <br />Methylene chloride <br />< 5.0 <br />5.0 <br />0.85 <br />ug/L <br />Naphthalene <br />< 5.0 <br />5.0 <br />0.30 <br />ug/L <br />n-Butylbenzene <br />< 2.5 <br />2.5 <br />0.15 <br />ug/L <br />n-Propylbenzene <br />< 1.0 <br />1.0 <br />0.094 <br />ug/L <br />o -Xylene <br />< 1.0 <br />1.0 <br />0.19 <br />ug/L <br />p-Isopropyltoluene <br />< 2.5 <br />2.5 <br />0.14 <br />ug/L <br />sec-Butylbenzene <br />< 1.0 <br />1.0 <br />0.11 <br />ug/L <br />Styrene <br />< 1.0 <br />1.0 <br />0.21 <br />ug/L <br />tert-Butylbenzene <br />< 1.0 <br />1.0 <br />0.091 <br />ug/L <br />Tetrachloroethene <br />< 1.0 <br />1.0 <br />0.28 <br />ug/L <br />Tetrahydrofuran <br />< 20 <br />20 <br />0.75 <br />ug/L <br />Toluene <br />< 1.0 <br />1.0 <br />0.10 <br />ug/L <br />trans-1,2-Dichloroethene <br />< 1.0 <br />1.0 <br />0.056 <br />ug/L <br />trans-1,3-Dichloropropene <br />< 1.0 <br />1.0 <br />0.14 <br />ug/L <br />Trichloroethene <br />< 1.0 <br />1.0 <br />0.18 <br />ug/L <br />Trichlorofluoromethane <br />< 1.0 <br />1.0 <br />0.29 <br />ug/L <br />Vinyl chloride <br />< 1.0 <br />1.0 <br />0.21 <br />ug/L <br />Surrogate:4-Bromofluorobenzene <br />47.6 <br />ug/L <br />50.0 <br />95.3 <br />80-121 <br />Surrogate: Dibromofluoromethane <br />50.5 <br />ug/L <br />50.0 <br />101 <br />79.9-121 <br />Surrogate: Toluene -d8 <br />50.2 <br />ug/L <br />50.0 <br />100 <br />80-120 <br />LCS (BOF1608-BSI) <br />Prepared & Analyzed: 06/16/10 <br />1,1,2,2 -Tetrachloroethane <br />51.0 <br />1.0 <br />0.16 <br />ug/L <br />50.0 <br />102 <br />80-121 <br />1,1-Dichloroethane <br />48.0 <br />1.0 <br />0.15 <br />ug/L <br />50.0 <br />95.9 <br />80-125 <br />1,1-Dichloroethene <br />46.2 <br />1.0 <br />0.24 <br />ug/L <br />50.0 <br />92.4 <br />80-125 <br />1,3,5-Trimethylbenzene <br />48.9 <br />1.0 <br />0.11 <br />ug/L <br />50.0 <br />97.8 <br />75.4-125 <br />1,4 -Dichlorobenzene <br />48.8 <br />1.0 <br />0.081 <br />ug/L <br />50.0 <br />97.7 <br />75-125 <br />2-Chlorotoluene <br />49.6 <br />1.0 <br />0.081 <br />ug/L <br />50.0 <br />99.2 <br />75.4-125 <br />Legend Technical Services, Inc. The results in this report apply to the samples analyzed in accordance with <br />the chain of custody document. This analytical report must be reproduced <br />in its entirety. <br />Page 10 of 14 <br />