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QC Sample Results <br /> Client: Stantec Consulting Corp. TestAmerica Job ID: 320-24082-1 <br /> Project/Site: 7-11 #19976 <br /> Method: 8260B -Volatile Organic Compounds (GC/MS) (Continued) <br /> Lab Sample ID: LCS 320-140984/6 Client Sample ID: Lab Control Sample <br /> Matrix: Solid Prep Type: Total/NA <br /> Analysis Batch: 140984 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> 4-Chlorotoluene 50.0 54.05 ug/Kg 108 67-128 <br /> Benzene 50.0 50.64 ug/Kg 101 78-128 <br /> Bromobenzene 50.0 51.61 ug/Kg 103 67-132 <br /> Bromochloromethane 50.0 47.83 ug/Kg 96 80-127 <br /> Bromodichloromethane 50.0 50.74 ug/Kg 101 80-137 <br /> Bromoform 50.0 50.84 ug/Kg 102 80-136 <br /> Bromomethane 50.0 43.72 ug/Kg 87 48-164 <br /> Carbon tetrachloride 50.0 52.44 ug/Kg 105 62-154 <br /> Chlorobenzene 50.0 50.56 ug/Kg 101 74-125 <br /> Chloroethane 50.0 48.69 ug/Kg 97 54-148 <br /> Chloroform 50.0 50.02 ug/Kg 100 78-135 <br /> Chloromethane 50.0 39.65 ug/Kg 79 60-141 <br /> cis-1,2-Dichloroethene 50.0 49.08 ug/Kg 98 74-131 <br /> cis-1,3-Dichloropropene 50.0 51.29 ug/Kg 103 80-134 <br /> Dibromomethane 50.0 49.86 ug/Kg 100 80-129 <br /> Dichlorodifluoromethane 50.0 37.93 ug/Kg 76 60-130 <br /> Ethylbenzene 50.0 52.01 ug/Kg 104 72.125 <br /> Hexachlorobutadiene 50.0 48.23 ug/Kg 96 52-140 <br /> 1sopropylbenzene 50.0 51.30 ug/Kg 103 69-137 <br /> Methyl tert-butyl ether 50.0 49.18 ug/Kg 98 66-146 <br /> Methylene Chloride 50.0 46.17 ug/Kg 92 77-125 <br /> Naphthalene 50.0 42.40 ug/Kg 85 53-140 <br /> n-Butylbenzene 50.0 55.70 ug/Kg 111 68-136 <br /> N-Propylbenzene 50.0 55.39 ug/Kg 111 63-128 <br /> p-Isopropyltoluene 50.0 54.75 ug/Kg 109 64-137 <br /> sec-Butyl benzene 50.0 55.32 ug/Kg 111 68-131 <br /> Styrene 50.0 50.68 ug/Kg 101 79-128 <br /> tert-Butyl alcohol(TBA) 500 472.0 ug/Kg 94 46-181 <br /> tert-Butyl benzene 50.0 52.58 ug/Kg 105 67-131 <br /> Tetrachloroethene 50.0 51.08 ug/Kg 102 65-135 <br /> Toluene 50.0 50.19 ug/Kg 100 80-124 <br /> trans-1,2-Dichloroethene 50.0 49.46 ug/Kg 99 67-135 <br /> trans-1,3-Dichloropropene 50.0 51.12 ug/Kg 102 80-148 <br /> Trichloroethene 50.0 51.25 ug/Kg 103 80-126 <br /> Trichlorofluoromethane 50.0 50.04 ug/Kg 100 43-158 <br /> Vinyl chloride 50.0 46.11 ug/Kg 92 67-127 <br /> Xylenes,Total 100 101.9 ug/Kg 102 75-122 <br /> LCS LCS <br /> Surrogate %Recovery Qualifier Limits <br /> 1,2-Dichloroethane-d4(Surr) 94 32-156 <br /> 4-Bromofluorobenzene(Surr) 99 63-143 <br /> Dibromofluoromethane(Surr) 99 55-129 <br /> Toluene-d8(Surr) 104 63-138 <br /> TestAmerica Sacramento <br /> Page 16 of 26 12/8/2016 <br />