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C H RO MALAB, INC. Submission # 1999-05-1049 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Robert Kltay Prep Method 5030 <br /> Batch QC Report <br /> Volatile Organic Compounds <br /> Matrix Spike ( MS I MSD ) Soil QC Batch # 1999105114-01 06 <br /> Sample ID MW-6 11 0 Lab Sample ID 1999-05-1049-006 <br /> MS 1999105114-01 06-004 Extracted 05/14/1999 18 35 Analyze 05/14/1999 14 35 Dilution 1 0 <br /> MSD 1999105114-01 06-005 Extracted 05/14/1999 19 14 Analyze 05/14/1999 19 14 Dilution 1 0 <br /> Compound Conc ug/Kg Added Recovery % RPD Control Limits% Flags <br /> MS MSD Sample Amount MS MSD' Recovery ' RPD MS MSD <br /> Benzene 57871 158624 ND 500 1 1157 1172 0 3 I 69-129 20 <br /> Chlorobenzene 56893 58204 ND 500 1138 1164 0 6 61-121 20 <br /> 1 1-Dichloroethene 53364 55623 NO 500 1067 1112 10 65-125 20 <br /> Toluene 57795 58721 NO 500 1156 1174 0 4 70-130 20 <br /> Trichloroethene 55352 56277 NO 500 1107 1126, 0 4 I 74-134 20 <br /> Surrogate(s) <br /> 4-Sromofluorobenzene 48424 49266 500 968 985 I 74-121 <br /> 1 2-Dichloroethane-d4 50932 47877 500 1019 958 70-121 � <br /> Toluene-d8 51596 49294 500 I 1032 986 I 81-117 <br /> 1220 Quarry Lane'Pleasanton California 945664756 <br /> Telephone (925)484-1919' Facsimile (925)484-1096 <br /> Printed on 05/19/1999 1125 Page 12 of 13 <br />