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C H R4 MALAB, INC. Submission # 1999-05-1062 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8020 <br /> 8015M <br /> Attn Greg Schramn Prep Method 5030 <br /> Batch QC Report <br /> Volatile Hydrocarbons by 8015/8020 <br /> Matrix Spike ( MS 1 MSD } Water QC Batch # 1999/05117-01 03 <br /> Sample ID MW-4 Lab Sample ID 1999-05-1062-004 <br /> MS 1999105117-01 03-004 Extracted 05/17/1999 1215 Analyze 05/17/1999 12 15 Dilution 1 0 <br /> MSD 1999105117-01 03-005 Extracted 05/17/1999 1311 Analyze 05/17/1999 13 11 Dilution 1 0 <br /> Compound Conc ug Added Recovery% RPD I Control Limits% Flags <br /> MS I MSD Sample ; Amount MS MSD Recovery RPD MS MSD <br /> Gasoline 1148593 1143751 2500 j 2500 4944 -425, 594 65-135 20 <br /> I <br /> Surrogate(s) <br /> Tnfluorotoluene 6331121 637 0600 500 I 1266, 12741 58-124 <br /> 4-Bromofluorobenzene-91516 5513 531 5393 500 1033 106 3' 50-150 <br /> 1220 Quarry Lane'Pleasanton California 94566.4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 051191199914 55 Page 16 of 17 <br />