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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:440-66625-13-1 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 /> Chloromethane ND 25.0 28.7 ug/L 115 39-144 <br /> cis-1,2-Dichloroethene ND 25.0 27.2 ug/L 109 70-130 <br /> cis-1,3-Dichloropropene ND 25.0 28.1 ug/L 113 70-133 <br /> Acetone ND 25.0 22.9 ug/L 92 10-150 <br /> Dibromochloromethane ND 25.0 28.1 ug/L 113 70-148 <br /> Dibromomethane ND 25.0 27.2 ug/L 109 70-130 <br /> Dichlorodifluoromethane ND 25.0 31.5 ug/L 126 25-142 <br /> Isopropyl Ether(DIPE) ND 25.0 25.8 ug/L 103 64-138 <br /> Ethyl-t-butyl ether(ETBE) ND 25.0 26.4 ug/L 106 70-130 <br /> Isopropylbenzene ND 25.0 29.3 ug/L 117 70-132 <br /> m,p-Xylene ND 50.0 51.7 ug/L 103 70-133 <br /> Methylene Chloride ND 25.0 20.7 ug/L 83 52-130 <br /> Methyl-t-Butyl Ether(MTBE) ND 25.0 26.1 ug/L 104 70-130 <br /> Naphthalene ND 25.0 22.9 ug/L 92 60-140 <br /> n-Butylbenzene ND 25.0 29.8 ug/L 119 61-149 <br /> Carbon disulfide ND 25.0 23.8 ug/L 95 49-140 <br /> N-Propylbenzene ND 25.0 28.4 ug/L 113 66-135 <br /> o-Xylene ND 25.0 24.9 ug/L 100 70-133 <br /> 4-Isopropyltoluene ND 25.0 29.4 ug/L 118 70-130 <br /> sec-Butyl benzene ND 25.0 29.5 ug/L 118 67-134 <br /> Styrene ND 25.0 21.9 ug/L 88 29-150 <br /> Tert-amyl-methyl ether(TAME) ND 25.0 25.3 ug/L 101 68-133 <br /> tert-Butyl alcohol(TBA) ND 125 145 ug/L 116 70-130 <br /> tert-Butylbenzene ND 25.0 29.4 ug/L 118 70-130 <br /> Tetrachloroethene ND 25.0 28.4 ug/L 114 70-137 <br /> Toluene ND 25.0 25.2 ug/L 101 70-130 <br /> trans-1,2-Dichloroethene ND 25.0 26.9 ug/L 108 70-130 <br /> trans-1,3-Dichloropropene ND 25.0 29.2 ug/L 117 70-138 <br /> Trichloroethene ND 25.0 28.3 ug/L 113 70-130 <br /> Trichlorofluoromethane ND 25.0 34.9 ug/L 139 60-150 <br /> Vinyl chloride ND 25.0 31.4 ug/L 126 50-137 <br /> 1,3,5-Trimethylbenzene ND 25.0 28.2 ug/L 113 70-130 <br /> Ethylbenzene ND 25.0 26.7 ug/L 107 70-130 <br /> Vinyl acetate ND 25.0 24.4 ug/L 98 23-150 <br /> 2-Butanone(MEK) ND 25.0 20.9 ug/L 84 48-140 <br /> 4-Methyl-2-pentanone(MIBK) ND 25.0 25.3 ug/L 101 52-150 <br /> MS MS <br /> Surrogate %Recovery QuallKer Limits <br /> 4-Bromotluorobenzene(Surr) 107 80-120 <br /> Dibromofluoromethane(Surr) 101 76-132 <br /> Toluene-d8(Surr) 106 80-128 <br /> Lab Sample ID:440-66625-B-1 MSD Client Sample ID: Matrix Spike Duplicate <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis Batch: 154413 <br /> Sample Sample Spike MSD MSD %Rec. RPD <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> 1,1,1,2-Tetrachloroethane ND 25.0 27.6 ug/L 110 60-149 7 20 <br /> TestAmerica Irvine <br /> Page 15 of 33 1/13/2014 <br />