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QC Sample Results <br />Client: Stantec Consulting Corp. TestAmerica Job ID: 720-86164-1 <br />Project/Site: Former Chase Chevrolet <br />Method: 8260B/CA LUFTMS - 8260B / CA LUFT MS (Continued) <br />Lab Sample ID: LCS 720-243844/5 <br />Matrix: Solid <br />Analysis Batch: 243844 <br /> <br />Client Sample ID: Lab Control Sample <br />Prep Type: Total/NA <br />LCS LCS <br />Surrogate %Recovery Qualifier Limits <br />4-Bromofluorobenzene 86 45 -131 <br />1,2-Dichloroethane-d4 (Surr) 88 60 -140 <br />Toluene-d8 (Surr) 94 58-140 <br />Lab Sample ID: LCS 720-243844/7 <br />Matrix: Solid <br />Analysis Batch: 243844 <br />Client Sample ID: Lab Control Sample <br />Prep Type: Total/NA <br /> <br />Spike LCS LCS %Rec. <br />Analyte Added Result Qualifier Unit D %Rec Limits <br />Gasoline Range Organics (GRO) <br /> 1000 861 ug/Kg 86 70 - 122 <br />-C4-C12 <br />LCS LCS <br />Surrogate %Recovery Qualifier Limits <br />4-Bromofluorobenzene 86 45-131 <br />, 1,2-Dichloroethane-d4 (Surr) 88 60 -140 <br />Toluene-d8 (Surr) 95 58 -140 <br /> <br />Lab Sample ID: LCSD 720-243844/6 <br />Matrix: Solid <br />Analysis Batch: 243844 <br />Client Sample ID: Lab Control Sample Dup <br />Prep Type: Total/NA <br />Analyte <br />Spike <br />Added <br />LCSD LCSD <br />Result Qualifier Unit D %Rec <br />%Rec. <br />Limits RPD <br />RPD <br />Limit <br />Methyl tert-butyl ether 50.0 38.1 ug/Kg 76 70 - 144 1 20 <br />Benzene 50.0 41.8 ug/Kg 84 70 - 130 0 20 <br />Ethylbenzene 50.0 41.6 ug/Kg 83 80 - 137 1 20 <br />Naphthalene 50.0 41.1 ug/Kg 82 60 - 147 0 20 <br />Toluene 50.0 41.2 ug/Kg 82 75 - 120 2 20 <br />m-Xylene & p-Xylene 50.0 40.7 ug/Kg 81 70- 146 1 20 <br />o-Xylene 50.0 40.9 ug/Kg 82 70 - 140 1 20 <br />Xylenes, Total 100 81.6 ug/Kg 82 70- 146 1 20 <br />LCSD LCSD <br />Surrogate %Recovery Qualifier Limits <br />4-Bromofluorobenzene 86 45-131 <br />1,2-Dichloroethane-d4 (Sun) 88 60 -140 <br />Toluene-d8 (Surr) 94 58 -140 <br />1 Lab Sample ID: LCSD 720-243844/8 <br />Matrix: Solid <br />Analysis Batch: 243844 <br />Analyte <br />Client Sample ID: Lab Control Sample Dup <br />Prep Type: Total/NA <br />Spike LCSD LCSD %Rec. RPD <br />Added Result Qualifier Unit D %Rec Limits RPD Limit <br />Gasoline Range Organics (GRO) <br /> 1000 915 ug/Kg 91 70 - 122 6 20 <br />-C4-C12 <br />LCSD LCSD <br />Surrogate %Recovery Qualifier Limits <br />4-Bromofluorobenzene 87 45-131 <br />1,2-Dichloroethane-d4 (Surr) <br /> 90 60-140 <br />TestAmerica Pleasanton <br />Page 24 of 38 5/11/2018 •