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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 1 MSD ) Water QC Batch # 1999105119-01 07 <br /> Sample ID B2-W Lab Sample ID 1999-05-1118-012 <br /> MS 1999105119-01 07-004 Extracted 05/19/1999 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 Conc [ ug/L] Added Recovery% RPD Control Limits % Flags <br /> MS MSD Sample Amount MS MSD Recovery RPD MS MSD <br /> Benzene 52581 53562 ND 500 1052 1071 04 69-129 20 <br /> Chlorobenzene 54113 54644 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 64259 ND 500 1069 1085 0 4 70-130 20 <br /> Tnchloroethene 511 25 51856 ND 500 1023 1037 0 3 74-134 20 <br /> Surrogate(s) <br /> 4Bromofluorobenzene 48650 50294 Soo 973 1006 86-115 <br /> 1,2-Dichloroethane-d4 48066 49412 500 961 988 76-114 <br /> Toluene-d8 50530 52447 500 1011 1049 88-110 <br /> 1220 Quarry Lane' Pleasanton,California 945664756 <br /> Telephone (925)4841919'Facsimile (925)4841096 <br /> Printed on o5/2511999 o8 05 Page 16 of 17 <br />