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C H RO MALAB, INC. submission # 1999-05-1062 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Greg Schramn Prep Method 5030 <br /> Batch QC Report <br /> Volatile Organic Compounds <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch # 1999105113-01 09 <br /> Sample ID MW-1 Lab Sample ID 1999-05-1062-001 <br /> MS 1999105113-01 09-004 Extracted 05/13/1999 21 36 Analyze 05/13/1999 21 36 Dilution 1 0 <br /> MSD 1999105113-01 09-005 Extracted 05/13/1999 22 14 Analyze 05/13/1999 22 14 Dilution 1 0 <br /> Compound Conc ug Added Recovery% RPD Control Limits% Flags <br /> MS MSD Sample Amount MS, MSD! Recovery RPD MS MSD <br /> Benzene 49641 50174 NO I 500 1 9931 1003 0 3 69-129 20 <br /> Chlorobenzene 55785 56041 NO 500 11161 1121 01 61-121 20 <br /> 1 1-Dichloroethene 50234 47051 NO 500 1005 941 1 6 65-125 20 <br /> Toluene 51284 49523 NO j 500 1026. 990 09 70-130 20 <br /> Trichloroethene 50140 47411 NO 500 1003 948 14 74-134 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 46578 49415 500 932 98 8 86-115 <br /> 1 2-Dichloroethane-d4 51656 52771 500 1033 1055 76-114 <br /> Toluene-d8 154343 '495 23 500 1087 990 88-110 <br /> 1220 Quarry LanePleasanton California 94566-4756 <br /> Telephone (925)484-1919*Facsimile (925)484-1096 <br /> Printed on 05/19/1999 15 19 Page 23 of 24 <br />