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_ ~ aceAnalytical <br />!r www.paoelabs.com <br />If <br />t <br />QUALITY CONTROL DATA <br />Project: 79019.00 ELK RIVER-OLD CITY DU <br />Pace Project No.: 10192537 <br />MATRIX SPIKE SAMPLE: 1200783 <br />10192262003 Spike MS MS %Rec <br />Parameter Units Result Conc. Result %Rec Limits Qualifiers <br />Pace Analytical Services, Inc. <br />1700 Elm Street -Suite 200 <br />Minneapolis, MN 55414 <br />(612)607-1700 <br />Bromobenzene ug/L ND 50 50.3 101 75-125 <br />Bromochloromethane ug/L ND 50 54.4 109 75-129 <br />Bromodichloromethane ug/L ND 50 52.5 105 75-130 <br />Bromoform ug/L ND 50 50.0 100 75-125 <br />Bromomethane ug/L ND 50 54.1 108 52-150 <br />Carbon tetrachloride ug/L ND 50 59.8 120 75-150 <br />Chlorobenzene ug/L ND 50 51.0 102 75-127 <br />Chloroethane ug/L ND 50 49.0 98 75-146 <br />Chloroform ug/L ND 50 52.7 105 75-137 <br />Chloromethane ug/L ND 50 47.2 94 64-150 <br />cis-1,2-Dichloroethene ug/L 40.4 50 95.2 109 75-139 <br />cis-1,3-Dichloropropene ug/L ND 50 52.4 105 75-129 <br />Dibromochloromethane ug/L ND 50 50.7 101 75-125 <br />Dibromomethane ug/L ND 50 51.3 103 75-126 <br />Dichlorodifluoromethane ug/L ND 50 60.1 120 75-150 <br />Dichlorofluoromethane ug/L ND 50 54.2 108 75-143 <br />Diethyl ether (Ethyl ether) ug/L ND 50 52.7 105 71-133 <br />Ethylbenzene uglL ND 50 52.4 104 75-132 <br />Hexachloro-1,3-butadiene ug/L ND 25 25.2 101 62-147 <br />Isopropylbenzene (Cumene) ug/L ND 50 52.3 105 75-135 <br />m&p-Xylene ug/L ND 100 104 104 75-131 <br />Methyl-tert-butyl ether ug/L ND 50 52.7 105 71-137 <br />Methylene Chloride ug/L ND 50 51.4 103 57-134 <br />n-Butylbenzene ug/L ND 50 52.4 105 74-139 <br />n-Propylbenzene ug/L ND 50 53.5 107 75-137 <br />Naphthalene ug/L ND 50 47.0 93 75-129 <br />o-Xylene ug/L ND 50 50.0 100 75-128 <br />p-Isopropyltoluene ug/L ND 50 52.2 104 75-135 <br />sec-Butylbenzene ug/L ND 50 52.8 106 75-137 <br />Styrene ug/L ND 50 51.1 102 75-126 <br />tert-Butylbenzene ug/L ND 50 51.2 102 75-133 <br />Tetrachloroethene uglL 17.1 50 70.4 107 75-138 <br />Tetrahydrofuran ug/L ND 500 415 83 74-128 <br />Toluene ug/L ND 50 51.5 103 75-131 <br />trans-1,2-Dichloroethene ug/L 9.3 50 64.8 111 75-140 <br />trans-1,3-Dichloropropene ug/L ND 50 51.7 103 75-129 <br />Trichloroethene ug/L 41.3 50 92.3 102 75-132 <br />Trichlorofluoromethane ug/L ND 50 58.0 116 75-150 <br />Vinyl chloride ug/L 2.9 50 55.4 105 75-150 <br />Xylene (Total) ug/L ND 150 154 102 75-129 <br />1,2-Dichloroethene-d4 (S) % 102 75-125 <br />4-Bromofluorobenzene (S) % 101 75-125 <br />Dibromofluoromethane (S) % 104 75-125 1 M <br />Toluene-d8 (S) % 101 75-125 <br />Date: 05/21/2012 03:19 PM <br />REPORT OF LABORATORY ANALYSIS <br />Page 15 of 19 <br />This report shall not be reproduced, except in full, <br />without the written consent of Pace Analytical Services, Inc.. <br />15 of 21 <br />