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C H RO MALAB, INC. Submission # 1999-05-1136 <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 l MSD } Water QC Batch # 1999/05/19-01.07 <br /> Sample ID B2-W Lab Sample ID 1999-05-1118-012 <br /> MS 1999105119-01 07-004 Extracted 05/1911999 17 22 Analyze 05/19/1999 17 22 Dilution 1 0 <br /> MSD 1999105119-01 07-005 Extracted 05/19/1999 18 01 Analyze 05/19/1999 18 01 Dilution 1 0 <br /> Compound Cone [ uglL j Added Recovery% RPD Control Limits % Flags <br /> MS MSD Sample Amount MS MSD Recovery RPD MS MSD <br /> Benzene 525 81 53562 ND 500 1052 107 1 0 4 69-129 20 <br /> Chlorobenzene 541 13 546 44 ND 500 1082 1093 0 3 61-121 20 <br /> 1,1-Dichloroethene 46241 46464 ND 500 925 929 01 65-125 20 <br /> Toluene 53428 54259 ND 500 1069 1085 0 4 70-130 20 <br /> Trichloroethene 51125 51856 ND 500 1023 1037 0 3 74-134 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 48650 50294 500 973 1006 86-115 <br /> 1,2-Dichloroethane-d4 48066 49412 500 961 988 76-114 <br /> Toluene-d8 50530 52447 Soo 101 1 1049 88-110 <br /> 1220 Quarry LanePleasanton,California 94566-4756 <br /> Telephone (925)4841919'Facsimile (925)484-1096 <br /> Printed on 0512511 999 08 04 Page 16 of 17 <br />