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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-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 /> N-Propylbenzene ND 25.0 25.8 ug/L 103 66-135 9 20 <br /> o-Xylene ND 25.0 23.4 ug/L 94 70-133 6 20 <br /> 4-Isopropyltoluene ND 25.0 26.1 ug/L 104 70-130 12 20 <br /> sec-Butyl benzene ND 25.0 26.5 ug/L 106 67-134 11 20 <br /> Styrene ND 25.0 18.8 ug/L 75 29-150 15 35 <br /> Tert-amyl-methyl ether(TAME) ND 25.0 24.2 ug/L 97 68-133 5 30 <br /> terl-Butyl alcohol(TBA) ND 125 126 ug/L 101 70-130 14 25 <br /> tert-Butyl benzene ND 25.0 26.1 ug/L 104 70-130 12 20 <br /> Tetrachloroethene ND 25.0 25.4 ug/L 102 70-137 11 20 <br /> Toluene ND 25.0 23.1 ug/L 92 70-130 9 20 <br /> trans-1,2-Dichloroethene ND 25.0 24.6 ug/L 98 70-130 9 20 <br /> trans-1,3-Dichloropropene ND 25.0 27.1 ug/L 108 70-138 7 25 <br /> Trichloroethene ND 25.0 26.2 ug/L 105 70-130 8 20 <br /> Trichlorofluoromethane ND 25.0 31.6 ug/L 126 60-150 10 25 <br /> Vinyl chloride ND 25.0 29.9 ug/L 120 50-137 5 30 <br /> 1,3,5-Trimethylbenzene ND 25.0 25.4 ug/L 102 70-130 10 20 <br /> Ethylbenzene ND 25.0 24.7 ug/L 99 70-130 8 20 <br /> Vinyl acetate ND 25.0 22.6 ug/L 90 23-150 8 30 <br /> 2-Butanone(MEK) ND 25.0 21.5 ug/L 86 48-140 3 40 <br /> 4-Methyl-2-pentanone(MIBK) ND 25.0 25.1 ug/L 100 52-150 1 35 <br /> MSD MSD <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 108 80-120 <br /> Dibromofluoromethane(Surr) 104 76-132 <br /> Toluene-d8(Surr) 105 80-128 <br /> Method: 8270C LL-Semivolatile Organic Compounds by GCMS-Low Levels <br /> Lab Sample ID: MB 440-153246/1-A Client Sample ID:Method Blank <br /> Matrix:Water Prep Type:Total/NA <br /> Analysis Batch: 153747 Prep Batch: 153246 <br /> MB MB <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <br /> 1,2,4-Trichlorobenzene ND 1.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 1,2-Dichlorobenzene ND 0.50 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 1,2-Diphenylhydrazine(as ND 1.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> Azobenzene) <br /> 1,3-Dichlorobenzene ND 0.50 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 1,4-Dichlorobenzene ND 0.50 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2,4,5-Trichlorophenol ND 2.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2,4,6-Trichlorophenol ND 1.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2,4-Dichlorophenol ND 2.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2,4-Dimethylphenol ND 2.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2,4-Dinitrophenol ND 5.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2,4-Din trotoluene ND 5.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2,6-Dinhrotoluene ND 5.0 ug/L 12/29/13 09:25 01/02/14 11:09 1 <br /> 2-Chloronaphthalene ND 0.50 ug/L 12/29/13 09:25 01/02/14 11.09 1 <br /> 2-Chlorophenol ND 1.0 ug/L 12/29/1309:25 01/02/1411:09 1 <br /> TestAmerica Irvine <br /> Page 17 of 33 1/13/2014 <br />