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I <br /> QC Sample Results j) <br /> Client:Conestoga-Rovers&Associates, Inc. TestAmerica Job ID:440-4364-1 <br /> Project/Site:4315 Waterloo Rd.,Stockton,CA <br /> Method: 8260B -Volatile Organic Compounds(GC/MS)(Continued) <br /> Lab Sample ID:440-4784-C-7 MS Client Sample ID:Matrix Spike <br /> 4; <br /> Matrix:Water Prep Type:Total/NA .. <br /> Analysis Batch: 12419 <br /> Sample Sample Spike MS Ms %Rec. <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits <br /> Ethyl-t-butyl ether(ETBE) ND 25.0 24.5 ug/L 98 60-135 . <br /> Ethylbenzene ND 25.0 26.3 ug/L 105 65_130 , <br /> m,p-Xylene ND 50.0 51.7 ug/L 103 65-130 " <br /> Methyl-t-Butyl Ether(MTBE) ND 25.0 23.4 ug/L 94 55-145 <br /> o-Xylene ND 25.0 26.4 ug/L 106 65-125 <br /> Tert-amyl-methyl ether(TAME) ND 25.0 25.5 ug/L 102 60-140 <br /> tert-Butyl alcohol(TBA) ND 125 163 ug/L 130 65-140 g .z. <br /> Toluene ND 25.0 25.8 ug/L 103 70.125 - <br /> 1,2-Dichloroethane ND 25.0 27.6 ug/L 110 60-140 <br /> Ethanol ND 250 241 ug/L 96 40-155 <br /> 1,2-Dibromoethane(EDB) ND 25.0 27.7 ug/L 111 70-130 <br /> MS MS <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 104 80-120 <br /> Dibromofluoromethane(Suer) 94 80-120 <br /> Toluene-d8(Surr) 105 80-120 <br /> Lab Sample ID:440-4784-C-7 MSD Client Sample ID: Matrix Spike Duplicate <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis Batch: 12419 <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 24.4 ug/L 98 65-125 0 20 <br /> Isopropyl Ether(DIPE) ND 25;0 22.9 ug/L 92 60-140 3 25 <br /> Ethyl-t-butyl ether(ETBE) ND 25.0 24.0 ug/L, 96 60-135 2 25 <br /> Ethylbenzene ND 25.0 25.6 ug/L 102 65-130 3 20 <br /> m,p-Xylene ND 50.0 51.1 ug/L 102 65-130 1 25 <br /> Methyl-t-Butyl Ether(MTBE) ND 25.0 23.4 ug/L 94 55-145 0 25 <br /> o-Xylene ND 25.0 26.3 ug/L 105, 65-125 0 20 <br /> Tert-amyl-methyl ether(TAME) ND 25.0 25.0 ug/L 100 60-140 2 30 <br /> tert-Butyl alcohol(TBA) ND 125 153 ug/L 123 65-140 6 25 <br /> ......._ _....._. <br /> Toluene ND 25.0 24.7 u 9/L 99 70_125 4 20 <br /> 1,2-Dichloroethane ND 25.0 26.8 ug/L 107 60-140 3 20 <br /> Ethanol ND '250 247 ug/L 99 40-155 2 30 <br /> 1,2-Dibromoethane(EDB) ND 25.0 27.1 ug/L" 108 70-130 2 25 <br /> MSD MSD <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 104 80-120 <br /> Dibromofluoromethane(Surr) 96 80-120 <br /> Toluene-d8(Surr) 101 80-120 <br /> I <br /> Method: 8260B/CA LUFTMS -Volatile Organic Compounds by GUMS <br /> Lab Sample ID: MB 440-12418/4 Client Sample ID:Method Blank <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis Batch: 12418 <br /> MB MB <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <br /> Volatile Fuel Hydrocarbons(C4-C12) ND 50 ug/L 03/10/12 14:05 1 <br /> TestAmerica Irvine <br /> Page 7 of 13 3/20/2012 <br />