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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 />13400 15th 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 />1,1,1,2 -Tetrachloroethane <br />< 1.0 <br />1.0 <br />0.29 <br />1,10 -Trichloroethane <br />< 1.0 <br />1.0 <br />0.16 <br />1,1,2,2 -Tetrachloroethane <br />< 1.0 <br />1.0 <br />0.16 <br />1,1,2 -Trichloroethane <br />< 1.0 <br />1.0 <br />0.19 <br />1,1,2-Tdchlorotdfluoroethane <br />< 1.0 <br />1.0 <br />0.25 <br />1,1-Dichloroethane <br />< 1.0 <br />1.0 <br />0.15 <br />1,1-Dichloroethene <br />< 1.0 <br />1.0 <br />0.24 <br />1,1-Dichloropropene <br />< 1.0 <br />1.0 <br />0.14 <br />1,2,3-Trichlorobenzene <br /><5.0 <br />5.0 <br />0.35 <br />1,2,3-Trichloropropane <br /><2.5 <br />2.5 <br />0.22 <br />1,2,4-Tdchlorobenzene <br /><5.0 <br />5.0 <br />0.30 <br />1,2,4-Trimethylbenzene <br />< 1.0 <br />1.0 <br />0.072 <br />1,2-Dibromo-3-chloropropane <br /><5.0 <br />5.0 <br />0.40 <br />1,2-Dibromoethane (EDB) <br />< 2.5 <br />2.5 <br />0.15 <br />1,2 -Dichlorobenzene <br />< 1.0 <br />1.0 <br />0.12 <br />1,2-Dichloroethane <br />< 1.0 <br />1.0 <br />0.26 <br />1,2-Dichloropropane <br />< 1.0 <br />1.0 <br />0.19 <br />1,3,5-Trimethylbenzene <br />< 1.0 <br />1.0 <br />0.11 <br />1,3 -Dichlorobenzene <br />< 1.0 <br />1.0 <br />0.15 <br />1,3-Dichloropropane <br /><1.0 <br />1.0 <br />0.16 <br />1,4 -Dichlorobenzene <br />< 1.0 <br />1.0 <br />0.081 <br />2,2-Dichloropropane <br /><5.0 <br />5.0 <br />0.66 <br />2-Butanone <br /><20 <br />20 <br />0.65 <br />2-Chlorotoluene <br />< 1.0 <br />1.0 <br />0.081 <br />4-Chlorotoluene <br />< 1.0 <br />1.0 <br />0.11 <br />Acetone <br />< 20 <br />20 <br />0.65 <br />Allyl chloride <br />< 5.0 <br />5.0 <br />0.51 <br />Benzene <br />< 1.0 <br />1.0 <br />0.071 <br />Bromobenzene <br />< 1.0 <br />1.0 <br />0.082 <br />Bromochloromethane <br />< 1.0 <br />1.0 <br />0.20 <br />Bromodichloromethane <br />< 1.0 <br />1.0 <br />0.23 <br />Bromoform <br />< 5.0 <br />5.0 <br />0.26 <br />Bromomethane <br />< 5.0 <br />5.0 <br />0.32 <br />Carbon tetrachloride <br />< 1.0 <br />1.0 <br />0.15 <br />Chlorobenzene <br />< 1.0 <br />1.0 <br />0.20 <br />Chloroethane <br /><2.5 <br />2.5 <br />0.27 <br />Chloroform <br />< 1.0 <br />1.0 <br />0.15 <br />Chloromethane <br />< 2.5 <br />2.5 <br />0.24 <br />cis-1,2-Dichloroethene <br />< 1.0 <br />1.0 <br />0.12 <br />Legend Technical Services, Inc. <br />Prepared & Analyzed: 06/16/10 <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />u9A- <br />ugA. <br />ug/L <br />ug/L <br />ug/L <br />ugtL <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />U911- <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />ug/L <br />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 9 of 14 <br />