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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 />knalyte Result RL MDL Units Level Result %REC Limits %RPD Limit Notes <br />Batch BOF1608 - EPA 5030 Water (Purge and Trap) <br />Source: 1002261-02 <br />Prepared & Analyzed: 06/16/10 <br />Prepared & Analyzed: 06/16/10 <br />_ <br />52.9 <br />LCS (BOF1608-BS1) <br />0.16 <br />ug/L <br />50.0 <br /><1.0 <br />Prepared & Analyzed: 06/16/10 <br />Benzene <br />48.4 <br />1.0 <br />0.071 <br />ug/L <br />50.0 <br />96.8 <br />80-120 <br />Bromoform <br />50.2 <br />5.0 <br />0.26 <br />ug/L <br />50.0 <br />100 <br />80-120 <br />Chlorobenzene <br />49.0 <br />1.0 <br />0.20 <br />ug/L <br />50.0 <br />98.0 <br />80-120 <br />Chloroform <br />46.2 <br />1.0 <br />0.15 <br />ug/L <br />50.0 <br />92.3 <br />80-123 <br />Ethylbenzene <br />48.3 <br />1.0 <br />0.28 <br />ug/L <br />50.0 <br />96.6 <br />80-120 <br />n-Butyibenzene <br />49.1 <br />2.5 <br />0.15 <br />ug/L, <br />50.0 <br />98.2 <br />75-125 <br />n-Propylbenzene <br />50.2 <br />1.0 <br />0.094 <br />ug/L <br />50.0 <br />100 <br />75.8-125 <br />Toluene <br />48.3 <br />1.0 <br />0.10 <br />ug/L <br />50.0 <br />96.7 <br />80-120 <br />Trichloroethene <br />47.3 <br />1.0 <br />0.18 <br />ug/L <br />50.0 <br />94.7 <br />80-120 <br />Vinyl chloride <br />48.6 <br />1.0 <br />0.21 <br />ug/L <br />50.0 <br />97.2 <br />75-130 <br />Surrogate:4-Bromofluorobenzene <br />50.7 <br />Ethylbenzene <br />48.5 <br />U91L <br />50.0 <br />101 <br />80-121 <br />Surrogate: Dibromofluoromethane <br />50.7 <br />80-120 <br />n-Butylbenzene <br />ug/L <br />50.0 <br />101 <br />79.9-121 <br />Surrogate: Tofuene-d8 <br />50.9 <br />101 <br />75-130 <br />ug/L <br />50.0 <br />102 <br />80-120 <br />Matrix Spike (BOF1608-MS1) <br />Source: 1002261-02 <br />Prepared & Analyzed: 06/16/10 <br />Prepared & Analyzed: 06/16/10 <br />1,1,2,2 -Tetrachloroethane <br />52.9 <br />1.0 <br />0.16 <br />ug/L <br />50.0 <br /><1.0 <br />106 <br />76.8-125 <br />1,1-Dichloroethane <br />48.8 <br />1.0 <br />0.15 <br />ug/L <br />50.0 <br /><1.0 <br />97.7 <br />80-125 <br />1,1-Dichloroethene <br />45.8 <br />1.0 <br />0.24 <br />ug/L <br />50.0 <br /><1.0 <br />91.7 <br />80-125 <br />1,3,5-Tdmethylbenzene <br />50.0 <br />1.0 <br />0.11 <br />ug/L <br />50.0 <br /><1.0 <br />99.9 <br />75-125 <br />1,4 -Dichlorobenzene <br />49.6 <br />1.0 <br />0.081 <br />ug/L <br />50.0 <br /><1.0 <br />99.2 <br />75-125 <br />2-Chlorotoluene <br />50.0 <br />1.0 <br />0.081 <br />ug/L <br />50.0 <br /><1.0 <br />100 <br />75-125 <br />Benzene <br />49.7 <br />" 1.0 <br />0.071 <br />ug/L <br />50.0 <br /><1.0 <br />99.5 <br />80-120 <br />Bromoform <br />48.6 <br />5.0 <br />0.26 <br />ug/L <br />50.0 <br /><5.0 <br />97.2 <br />80-120 <br />Chlorobenzene <br />49.5 <br />1.0 <br />0.20 <br />ug/L <br />50.0 <br /><1.0 <br />98.9 <br />80-120 <br />Chloroform <br />46.8 <br />1.0 <br />0.15 <br />ug/L <br />50.0 <br /><1.0 <br />93.6 <br />79.8-125 <br />Ethylbenzene <br />48.5 <br />1.0 <br />0.28 <br />ug/L <br />50.0 <br /><1.0 <br />97.1 <br />80-120 <br />n-Butylbenzene <br />50.3 <br />2.5 <br />0.15 <br />ug/L <br />50.0 <br /><2.5 <br />101 <br />75-130 <br />n-Propylbenzene <br />51.7 <br />1.0 <br />0.094 <br />ug/L <br />50.0 <br /><1.0 <br />103 <br />75-125 <br />Toluene <br />48.0 <br />1.0 <br />0.10 <br />ug/L <br />50.0 <br /><1.0 <br />96.1 <br />80-120 <br />Trichloroethene <br />49.8 <br />1.0 <br />0.18 <br />ug/L <br />50.0 <br />1.40 <br />96.8 <br />80-120 <br />Vinyl chloride <br />49.6 <br />1.0 <br />0.21 <br />ug/L <br />50.0 <br /><1.0 <br />99.2 <br />75-130 <br />Surrogate.4-Bromofluorobenzene <br />49.1 <br />ug/L <br />50.0 <br />98.1 <br />80-121 <br />Surrogate: Dibromotiuoromethane <br />51.5 <br />ug/L <br />50.0 <br />103 <br />79.9-121 <br />Surrogate: Toluene -l8 <br />50.1 <br />ug/L <br />50.0 <br />100 <br />80-120 <br />Matrix Spike Dup (BOF1608-MSD1) <br />1,1,2,2 -Tetrachloroethane <br />1,1-Dichloroethane <br />1,1-Dichloroethene <br />1,3,5-Trimethylbenzene <br />Legend Technical Services, Inc. <br />Source: 1002261-02 <br />Prepared & Analyzed: 06/16/10 <br />52.5 1.0 <br />0.16 <br />ug/L <br />50.0 <1.0 105 76.8-125 <br />0.706 20 <br />48.2 1.0 <br />0.15 <br />ug/L <br />50.0 <1.0 96.3 80-125 <br />1.40 20 <br />46.5 1.0 <br />0.24 <br />ug/L <br />50.0 <1.0 92.9 80-125 <br />1.33 20 <br />48.9 1.0 <br />0.11 <br />ug/L <br />50.0 <1.0 97.9 75-125 <br />2.09 20 <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 11 of 14 <br />