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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 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by 8260A <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch # 1999105118-02 09 <br /> Sample ID MW-3 Lab Sample ID 1999-05-1047-003 <br /> MS 1999105118-02 09-004 Extracted 05/18/1999 19 46 Analyze 05/18/1999 19 46 Dilution 1 0 <br /> MSD 1999105118-02 09-005 Extracted 05/18/1999 20 13 Analyze 05/18/1999 20 13 Dilution 1 0 <br /> Compound Conc [ ug/L] Added Recovery% RPD Control Limits % Flags <br /> MS MSD Sample Amount MS MSD Recovery RPD M5 MSD <br /> Methyl tert-butyl ether 548 554 12 50 856 868 03 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 54674 50457 500 1093 100 9 76-114 <br /> 1220 Quarry Lane`Pleasanton,California 94566-4756 <br /> Telephone (925)4841919'Facsimile (925)484-1096 <br /> Printed on 05/2511999 08 03 Page 8 of 9 <br />