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aeeAnaly~ical <br />J - www.pacslabscom <br />QUALITY CONTROL DATA <br />Project: 79019.00 ELK RIVER-OLD CITY DU <br />Pace Project No.: 10192537 <br />METHOD BLANK: 1199719 Matrix: Water <br />Associated Lab Samples: 10192 537001, 10192537002, 1 0192537003 <br /> Blank Reporting <br />Parameter Units Result Limit Analyzed <br />Dichlorodifluoromethane ug/L ND 1.0 05/18/1210:08 <br />Dichlorofluoromethane ug/L ND 1.0 05/18/1210:08 <br />Diethyl ether (Ethyl ether) ug/L ND 4.0 05/18/12 10:08 <br />Ethylbenzene ug/L ND 1.0 05/18/1210:08 <br />Hexachloro-1,3-butadiene ug/L ND 5.0 05/18/1210:08 <br />Isopropylbenzene (Cumene) ug/L ND 1.0 05/18/12 10:08 <br />m&p-Xylene ug/L ND 2.0 05/18/1210:08 <br />Methyl-tert-butyl ether ug/L ND 1.0 05!18/12 10:08 <br />Methylene Chloride ug/L ND 4.0 05/18/12 10:08 <br />n-Butylbenzene ug/L ND 1.0 05/18/1210:08 <br />n-Propylbenzene ug/L ND 1.0 05118/1210:08 <br />Naphthalene ug/L ND 4.0 05/18/1210:08 <br />o-Xylene ug/L ND 1.0 05/18/1210:08 <br />p-Isopropyltoluene ug/L ND 1.0 05/18/1210:08 <br />sec-Butylbenzene ug/L ND 1.0 05/18/1210:08 <br />Styrene ug/L ND 1.0 05118/1210:08 <br />tert-Butylbenzene ug/L ND 1.0 05/18/1210:08 <br />Tetrachloroethene ug/L ND 1.0 05/18/1210:08 <br />Tetrahydrofuran ug/L ND 10.0 05/18/1210:08 <br />Toluene ug/L ND 1.0 05/18/1210:08 <br />trans-1,2-Dichloroethene ug/L ND 1.0 05/18!1210:08 <br />trans-1,3-Dichloropropene ug/L ND 4.0 05/18/1210:08 <br />Trichloroethene ug/L ND 1.0 05/18/1210:08 <br />Trichlorofluoromethane ug/L ND 1.0 05/18/1210:08 <br />Vinyl chloride ug/L ND 0.40 05/18/12 10:08 <br />Xylene (Total) ug/L ND 3.0 05/18/12 10:08 <br />1,2-Dichloroethane-d4 (S) % 104 75-125 05/18/12 10:08 <br />4-Bromofluorobenzene (S) % 100 75-125 05/18/12 10:08 <br />Dibromofluoromethane (S) % 102 75-125 05/18/12 10:08 <br />Toluene-d8 (S) % 99 75-125 05/18/12 10:08 <br />Pace Analytical Services, Inc. <br />1700 Elm Street -Suite 200 <br />Minneapolis, MN 55414 <br />(612)607-1700 <br />Qualifiers <br />LABORATORY CONTROL SAMPLE: <br /> <br />Parameter 1199720 <br /> <br />Units <br />Spike <br />Conc. <br />LCS <br />Result <br />LCS <br />%Rec <br />%Rec <br />Limits <br />1,1,1,2-Tetrachloroethane ug/L 50 47.6 95 75-125 <br />1,1,1-Trichloroethane ug/L 50 48.4 97 73-128 <br />1,1,2,2-Tetrachloroethane ug/L 50 46.5 93 75-125 <br />1,1,2-Trichloroethane ug/L 50 47.3 95 75-125 <br />1,1,2-Trichlorotrifluoroethane ug/L 50 41.2 82 63-125 <br />1,1-Dichloroethane ug/L 50 48.1 96 72-126 <br />1,1-Dichloroethene ug/L 50 48.7 97 73-129 <br />1,1-Dichloropropene ug/L 50 49.6 99 72-128 <br />1,2,3-Trichlorobenzene ug/L 50 47.4 95 73-125 <br />1,2,3-Trichloropropane ug/L 50 47.0 94 75-125 <br />1,2,4-Trichlorobenzene ug/L 50 48.4 97 74-125 <br />Date: 05/21/2012 03:19 PM REPORT OF LABORATORY ANALYSIS <br />This report shall not be reproduced, except in full, <br />without the written consent of Pace Analytical Services, Inc.. <br />Qualifiers <br />Page 12 of 19 <br />12 of 21 <br />