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CHROMALAB, INC. Submission#: 2000-01-0265 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 8260A <br /> Attn: Keith Sheets Prep Method: 8260A � <br /> Batch QC Report � <br /> Fuel Oxygenates by GC/MS I <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch #2000101121-02.06 <br /> LCS: 2000101121-02.06-002 Extracted: 011211200013:22 Analyzed: 01/211200013:22 <br /> LCSD: 2000101121-02.06-003 Extracted: 01/211200013:49' Anaivzed: 011211200013:49 <br /> Compound Conc. [ug/L] Exp.Conc. [ug/L] Recovery[% ISD Ctrl.Limits 1%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Methyl tort-butyl ether 57.5 57.6 50.0 50.0 115.0 115.2 0.2 65-155 20 <br /> Surrogate(s) <br /> 1,2-Dlchloroethane-d4 472 484 500 500 94.4 96.8 76-114 <br /> I <br /> f <br /> f <br /> 1 <br /> it <br /> I <br /> 1220 Quarry lanePleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919`Facsimile:(925)484-1096 <br /> Printed on:01/27/2000 08:27 Page 9 of 10 k <br />