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QC Sample Results C <br /> Client: Stantec Consulting Corp. Job ID: 320-59971-1 <br /> Project/Site: 7-11 No 41531 <br /> Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued) <br /> Lab Sample ID: LCS 320-369958/8 Client Sample ID: Lab Control Sample <br /> Matrix: Solid Prep Type: Total/NA <br /> Analysis Batch: 369958 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> 1,4-Dichlorobenzene 0.0500 0.04686 mgXg 94 -65­12-4 <br /> Dichlorodifluoromethane 0.0500 0.05263 mg/Kg 105 60-130 <br /> 1,1-Dichloroethane 0.0500 0.04857 mg/Kg 97 76-134 <br /> 1,2-Dichloroethane 0.0500 0.05390 mg/Kg 108 66-150 <br /> 1,1-Dichloroethene 0.0500 0.04702 mg/Kg 94 66-136 <br /> 1,2-Dichloropropane 0.0500 0.04835 mg/Kg 97 80-129 ' <br /> 1,3-Dichloropropane 0.0500 0.05162 mg/Kg 103 80-123 <br /> 2,2-Dichloropropane 0.0500 0.04756 mg/Kg 95 69-153 <br /> 1,1-Dichloropropene 0.0500 0.04664 mg/Kg 93 76-132 <br /> Ethylbenzene 0.0500 0.04777 mg/Kg 96 72-125 <br /> Hexachlorobutadiene 0.0500 0.04383 mg/Kg 88 52-140 <br /> Isopropylbenzene 0.0500 0.04732 mg/Kg 95 69-137 <br /> Methylene Chloride 0.0500 0.04896 mg/Kg 98 77-125 <br /> Methyl tert butyl ether 0.0500 0.05167 mg/Kg 103 66-146 <br /> Naphthalene 0.0500 0.05151 mg/Kg 103 53-140 <br /> n-Butylbenzene 0.0500 0.04468 mg/Kg 89 68-136 ❑ <br /> N-Propylbenzene 0.0500 0.04483 mg/Kg 90 63-128 <br /> p-Isopropyltoluene 0.0500 0.04562 mg/Kg 91 64-137 <br /> sec-Butylbenzene 0.0500 0.04536 mg/Kg 91 68-131 <br /> Styrene 0.0500 0.04882 mg/Kg 98 79-128 <br /> tert-Butyl alcohol(TBA) 0.500 0.4755 mg/Kg 95 46-181 <br /> tert-Butylbenzene 0.0500 0.04900 mg/Kg 98 67-131 <br /> 1,1,1,2-Tetrachloroethane 0.0500 0.04932 mg/Kg 99 77-134 <br /> 1,1,2,2-Tetrachloroethane 0.0500 0.05108 mg/Kg 102 71-134 <br /> Tetrachloroethene 0.0500 0.04613 mg/Kg 92 65-135 <br /> Toluene 0.0500 0.04739 mg/Kg 95 80-124 <br /> trans-1,2-Dichloroethene 0.0500 0.04785 mg/Kg 96 67-135 <br /> trans-1,3-Dichloropropene 0.0500 0.04941 mg/Kg 99 80-148 <br /> 1,2,3-Trichlorobenzene 0.0500 0.04799 mg/Kg 96 54-140 <br /> 1,2,4-Trichlorobenzene 0.0500 0.04626 mg/Kg 93 48-145 <br /> 1,1,1-Trichloroethane 0.0500 0.04813 mg/Kg 96 67-150 <br /> 1,1,2-Trichloroethane 0.0500 0.05142 mg/Kg 103 80-128 <br /> Trichloroethene 0.0500 0.04742 mg/Kg 95 80-126 <br /> Trichlorofluoromethane 0.0500 0.04932 mg/Kg 99 43-158 <br /> 1,2,3-Trichloropropane 0.0500 0.05023 mg/Kg 100 71-132 <br /> 1,2,4-Trimethylbenzene 0.0500 0.04629 mg/Kg 93 64-137 <br /> 1,3,5-Trimethylbenzene 0.0500 0.04553 mg/Kg 91 66-135 <br /> Vinyl chloride 0.0500 0.04916 mg/Kg 98 67-127 <br /> Xylenes,Total 0.100 0.09498 mg/Kg 95 75-122 <br /> LCS LCS <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 89 63-143 <br /> Dibromofluoromethane(Surr) 94 55-129 <br /> Toluene-d8(Surr) 92 63-138 <br /> 1,2-Dichloroethane-d4(Surr) 95 32-156 <br /> Eurofins TestAmerica, Sacramento <br /> Page 19 of 33 4/9/2020 <br />