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1., <br /> STL ChromaLab Submission # 2001-04-0530 <br /> Environmental Services(CA 1094) <br /> To Wright E=nvironmental Services Inc Test Method 82608 <br /> Attn Maria Reid Prep Method 50308 <br /> Batch QC Report <br /> Fuel Oxygenates by 82606 <br /> I Laboratory Control Spike (LCS/LCSD) Water QC Batch #2009105101-01 27 <br /> LCS 2001105101-01 27-002 Extracted 05/01/2001 14 50 Analyzed 05/01/2001 14 50 <br /> LCSD 2001105101-01 27-003 Extracted 05/01/2001 15 28 Analyzed 05/01/2001 15 28 <br /> �Compound Conc [uglL] � Exp Conc [ug/L] Recovery[%]i RPD Ctrl Limits[%] FEags <br /> LCS LCSD ; LCS I LCSD I LCS i LCSD I [%� ;Recovery 'RPD i LCS LC5D <br /> Methyl tert-butyl ether 1 44 9 437 500 j 500 8981 87 4 2 7 65-165 20 <br /> Surrogate(s) I j <br /> 1 2-Dichloroethane-d4 519 488 I 500 I 500 103 S 976 76-114 <br /> Toluene-d8 486 490 500 500 97 2i 98 D1 88-110 <br /> I <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919*Facsimile (925)484-1096 <br /> Printed on 05/02/2001 16 29 Page 14 of 15 <br />