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leAnalyiical <br />www.pacelabs.com <br />QUALITY CONTROL DATA <br />Project: 60626192 STOCKTON UST <br />Pace Project No.: 10521947 <br />QC Batch: 1498978 Analysis Method: EPA 8260B <br />QC Batch Method: 5035A Analysis Description: VOA (GC/MS) 8260B <br />Laboratory: Pace National - Mt. Juliet <br />Associated Lab Samples: 10521947001, 10521947002, 10521947003, 10521947004, 10521947005, 10521947006 <br />METHOD BLANK: R3543099-6 Matrix: Solid <br />Associated Lab Samples: 10521947001, 10521947002, 10521947003, 10521947004, 10521947005, 10521947006 <br />Blank Reporting <br />Parameter Units Result Limit Analyzed Qualifiers <br />Benzene <br />mg/kg <br />ND <br />0.00100 <br />06/25/2016:36 <br />1,2-Dibromoethane (EDB) <br />mg/kg <br />ND <br />0.00100 <br />06/25/20 16:36 <br />1,2-Dichloroethane <br />mg/kg <br />ND <br />0.00100 <br />06/25/2016:36 <br />Diisopropyl ether <br />mg/kg <br />ND <br />0.00100 <br />06/25/20 16:36 <br />Ethanol <br />mg/kg <br />ND <br />0.100 <br />06/25/2016:36 <br />Ethylbenzene <br />mg/kg <br />ND <br />0.00100 <br />06/25/2016:36 <br />Methyl-tert-butyl ether <br />mg/kg <br />ND <br />0.00100 <br />06/25/20 16:36 <br />Toluene <br />mg/kg <br />ND <br />0.00500 <br />06/25/2016:36 <br />Xylene (Total) <br />mg/kg <br />ND <br />0.00300 <br />06/25/20 16:36 <br />tert-Amylmethyl ether <br />mg/kg <br />ND <br />0.00100 <br />06/25/20 16:36 <br />Ethyl-tert-butyl ether <br />mg/kg <br />ND <br />0.00100 <br />06/25/20 16:36 <br />tert-Butyl Alcohol <br />mg/kg <br />ND <br />0.00500 <br />06/25/20 16:36 <br />tert-Amyl Alcohol <br />mg/kg <br />ND <br />0.0500 <br />06/25/20 16:36 <br />Toluene -d8 (S) <br />% <br />98.4 <br />75.0-131 <br />06/25/20 16:36 <br />4-Bromofluorobenzene (S) <br />% <br />95.1 <br />67.0-138 <br />06/25/20 16:36 <br />1,2-Dichloroethane-d4 (S) <br />% <br />90.9 <br />70.0-130 <br />06/25/20 16:36 <br />Pace Analytical Services, LLC <br />1700 Elm Street - Suite 200 <br />Minneapolis, MN 55414 <br />(612)607-1700 <br />LABORATORY CONTROL SAMPLE: <br />Parameter <br />R3543099-1 <br />Units <br />Spike <br />Conc. <br />LCS <br />Result <br />LCS <br />% Rec <br />% Rec <br />Limits Qualifiers <br />Benzene <br />mg/kg <br />0.0250 <br />0.0289 <br />116 <br />70.0-123 <br />1,2-Dibromoethane (EDB) <br />mg/kg <br />0.0250 <br />0.0304 <br />122 <br />74.0-128 <br />1,2-Dichloroethane <br />mg/kg <br />0.0250 <br />0.0287 <br />115 <br />65.0-131 <br />Diisopropyl ether <br />mg/kg <br />0.0250 <br />0.0293 <br />117 <br />60.0-136 <br />Ethylbenzene <br />mg/kg <br />0.0250 <br />0.0298 <br />119 <br />74.0-126 <br />Methyl-tert-butyl ether <br />mg/kg <br />0.0250 <br />0.0283 <br />113 <br />66.0-132 <br />Toluene <br />mg/kg <br />0.0250 <br />0.0280 <br />112 <br />75.0-121 <br />Xylene (Total) <br />mg/kg <br />0.0750 <br />0.0879 <br />117 <br />72.0-127 <br />tert-Amyl Alcohol <br />mg/kg <br />0.125 <br />0.167 <br />134 <br />26.0-160 <br />tert-Amylmethyl ether <br />mg/kg <br />0.0250 <br />0.0293 <br />117 <br />66.0-135 <br />Ethyl-tert-butyl ether <br />mg/kg <br />0.0250 <br />0.0285 <br />114 <br />68.0-140 <br />Ethanol <br />mg/kg <br />1.25 <br />1.49 <br />119 <br />10.0-160 <br />tert-Butyl Alcohol <br />mg/kg <br />0.125 <br />0.169 <br />135 <br />15.0-160 <br />Toluene -d8 (S) <br />% <br />99.1 <br />75.0-131 <br />4-Bromofluorobenzene (S) <br />% <br />96.4 <br />67.0-138 <br />1,2-Dichloroethane-d4 (S) <br />% <br />109 <br />70.0-130 <br />Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. <br />REPORT OF LABORATORY ANALYSIS <br />This report shall not be reproduced, except in full, <br />Date: 06/26/2020 08:36 AM without the written consent of Pace Analytical Services, LLC. Page 14 of 22 <br />