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QC Sample Results <br /> Client: Conestoga-Rovers&Associates, Inc. TestAmerica Job ID:440-66281-1 <br /> Project/Site: 1267 Country Club Blvd., Stockton, CA <br /> Method: 8260B -Volatile Organic Compounds (GC/MS) (Continued) <br /> Lab Sample ID: LCS 440-154413/5 Client Sample ID:Lab Control Sample <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis Batch: 154413 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> Ethylbenzene 25.0 27.2 ug/L 109 70-130 <br /> Vinyl acetate 25.0 25.0 ug/L 100 48-140 <br /> 2-Butanone(MEK) 25.0 27.0 ug/L 108 44-150 <br /> 4-Methyl-2-pentanone(MIBK) 25.0 30.1 ug/L 120 59-149 <br /> LCS LCS � <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 105 80-120 <br /> Dibromofluoromethane(Surr) 94 76-132 <br /> Toluene-d8(Surr) 101 80-128 <br /> Lab Sample ID:440-66625-B-1 MS Client Sample ID: Matrix Spike <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis Batch: 154413 <br /> Sample Sample Spike MS MS %Rec. <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits <br /> 1,1,1,2-Tetrachloroethane ND 25.0 29.4 ug/L 118 60-149 <br /> 1,1,1-Trichloroethane ND 25.0 29.9 ug/L 120 70-130 <br /> 1,1,2,2-Tetrachloroethane ND 25.0 27.4 ug/L 110 63-130 <br /> 1,1,2-Trichloroethane ND 25.0 26.7 ug/L 107 70-130 <br /> 1,1-Dichloroethane ND 25.0 24.8 ug/L 99 65-130 <br /> 1,1-Dichloroethene ND 25.0 28.7 ug/L 115 70-130 <br /> 1,1-Dichloropropene ND 25.0 28.7 ug/L 115 64-130 <br /> 1,2,3-Trichlorobenzene ND 25.0 24.9 ug/L 100 60-140 <br /> 1,2,3-Trichloropropane ND 25.0 26.3 ug/L 105 60-130 <br /> 1,2,4-Trichlorobenzene ND 25.0 ND F1 ug/L 0 60-140 <br /> 1,2,4-T6 meth yl benzene ND 25.0 27.2 ug/L 109 70-130 <br /> 1,2-Dibromo-3-Chloropropane ND 25.0 24.5 ug/L 98 48-140 <br /> 1,2-Dibromoethane(EDB) ND 25.0 27.2 ug/L 109 70-131 <br /> 1,2-Dichlorobenzene ND 25.0 27.4 ug/L 110 70-130 <br /> 1,2-Dichloroethane ND 25.0 29.1 ug/L 116 56-146 <br /> 1,2-Dichloropropane ND 25.0 25.9 ug/L 104 69-130 <br /> 1,3-Dichlorobenzene ND 25.0 28.0 ug/L 112 70-130 <br /> 1,3-Dichloropropane ND 25.0 26.0 ug/L 104 70-130 <br /> 1,4-Dichlorobenzene ND 25.0 27.8 ug/L 111 70-130 <br /> 2,2-Dichloropropane ND 25.0 30.3 ug/L 121 69-138 <br /> 2-Chlorotoluene ND 25.0 27.4 ug/L 110 70-130 <br /> 4-Chlorotoluene ND 25.0 28.8 ug/L 115 70-130 <br /> Benzene ND 25.0 24.9 ug/L 100 66-130 <br /> Bromobenzene ND 25.0 27.5 ug/L 110 70-130 <br /> Bromochloromethane ND 25.0 25.1 ug/L 100 70-130 <br /> Bromodichloromethane ND 25.0 29.3 ug/L 117 70-138 <br /> Bromoform ND 25.0 29.1 ug/L 116 59-150 <br /> Bromomethane ND 25.0 28.7 ug/L 115 62-131 <br /> Carbon tetrachloride ND 25.0 35.0 ug/L 140 60-150 <br /> Chlorobenzene ND 25.0 25.5 ug/L 102 70-130 <br /> Chloroethane ND 25.0 30.8 ug/L 123 68-130 <br /> 2-Hexanone ND 25.0 23.9 ug/L 96 10-150 <br /> Chloroform ND 25.0 25.9 ug/L 103 70-130 <br /> TestAmerica Irvine <br /> Page 14 of 33 1/13/2014 <br />