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i <br /> STL ChromaLab Submission #: 2001-08-0260 <br /> Environmental Services(CA 1094) <br /> To: CH2M Hill-Oakland Test Method: 8260Br <br /> Attn: Keith Sheets Prep Method: 5030E <br /> Batch QC Report <br /> Fuel Oxygenates by 8260B (Low Level) <br /> I Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001108116-V1.27 <br /> LCS: 2001108116-V1.27-018 Extracted: 08116/20012033 Analyzed 08/161200120:33 <br /> LCSD: 2001/08116-V1.27-019 Extracted: 08/16/200120:55 Analyzed 08/161200120:55 <br /> i <br /> Compound Conc. [ug/L] Exp.Conc. [ug/L] Recovery[%] RPD Ctrl.Limits[°/a] Flags <br /> LCS LCSD LCS LCSD LCS LCSD 1%1 recovery RPD LCS LCSD <br /> Methyl tent-butyl ether 19.8 19.9 25 25 79.2 79.6 0.5 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 553 536 500 500 110.6 107.2 76-114 <br /> I <br /> i <br /> t <br /> I <br /> i <br /> f <br /> i <br /> f <br /> { 1220 Quarry Lane*Pleasanton,CA 94566-1756 <br /> Telephone:(925)484-1919"Facsimile:(925)484-1096 <br /> Printed on;08121/2001 11:26 Page 7 of 9 <br />