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QC Sample Results I '; <br /> Client:Conestoga-Rovers&Associates,Inc. TestAmerica Job ID:440-39095-1 <br /> Project/Site:4315 Waterloo Rd.,Stockton,CA <br /> Method: 8260B-Volatile Organic Compounds (GC/MS)(Continued) <br /> Lab Sample ID:440-39379-A-1 MS Client Sample ID:Matrix Spike <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis'Batch:88892 <br /> Sample Sample Spike MS MS %Rec, l_= <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits <br /> Benzene ND 25.0 20.7 ug/L 83 65-125 <br /> Isopropyl Ether(CIPE) ND 25.0 23.3 ug/L 93 60-140 <br /> Ethyl-t-butyl ether(ETBE) ND 25.0 21.9 ug/L 88 60-135 <br /> .. <br /> Ethylbenzene ND 25.0 23.5 ug/L 94 65-130 <br /> m,p-Xylene ND 50.0 46.5 ug/L 93 65.130 <br /> Methyl-t-Butyl Ether(MTBE) ND 25.0 22.5 ug/L 90 55-145 <br /> o-Xylene ND 25.0 23.3 ug/L 93 65-125 <br /> Tert-amyl-methyl ether(TAME) ND 25.0 21.9 ug/L 88 60-140 <br /> tert-Butyl alcohol 1rBA) ND 125 133 ug/L 106 65-140 <br /> Toluene ND 25.0 23.2 ug/L 93 70.125 <br /> 1,2-Dichloroethare ND 25.0 22.4 ug/L 90 60-140 <br /> Ethanol ND 250 283 ug/L 113 40_155 <br /> 1,2-Dibromoethane(EDB) ND 25.0 24.7 ug/L 99 70-130 <br /> MS MS <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 106 80-120 <br /> Dibromofluoromethane(Surr) 103 80-120 <br /> Toluene-d8(Surr, 109 80-120 <br /> Lab Sample ID:440-39379-A-1 MSD Client Sample ID:Matrix Spike Duplicate <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis Batch:88892 <br /> Sample Sample Spike MSD MSD %Rec. RPD <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> Benzene ND 25.0 21.4 ug/L 86 65-125 3 20 <br /> Isopropyl Ether(RIPE) ND 25.0 23.9 ug/L 96 60-140 3 25 <br /> Ethyl-t-butyl ether(ETBE) ND 25.0 22.3 ug/L 89 60-135 2 25 <br /> Ethylbenzene ND 25.0 23.9 ug/L 96 65.130 2 20 <br /> m,p-Xylene ND 50.0 47.8 ug/L 96 65_130 3 25 <br /> Methyl-t-Butyl Ether(MTBE) ND 25.0 23.2 ug/L 93 55-145 3 25 <br /> o-Xylene ND 25.0 23.8 ug/L 95 65-125 2 20 <br /> Tert-amyl-methyl ether(TAME) ND 25.0 23.2 ug/L 93 60-140 6 30 <br /> tert-Butyl alcohol(TBA) ND 125 .134 ug/L 107 65-140 1 25 <br /> Toluene ND 25.0 23.6 ug/L 94 70-125 2 20 <br /> 1,2-Dichloroethane ND 25.0 22.7 ug/L 91 60-140 1 20 <br /> Ethanol ND 250 312 ug/L 125 40--155 10 30 <br /> 1,2-Dibromoethane(EDB) ND 25.0 25.4 ug/L 102 70.130 3 25 <br /> MSD MSD <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 104 80-120 <br /> Dibromofluoromethane(Surr) 101 80-120 <br /> Toluene-d8(Surra 109 80-120 <br /> TestAmerica Irvine <br /> Page 8 of 14 3/5/2013 <br />