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' Submission# 20Q0-01-Q45fi <br /> CHROMALAB INC. <br /> Environmental Services(SDB) <br /> • To Wright Environmental Services Inc Test Method 8260A <br /> Attn Mana Reid Prep Method 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by GC/MS <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch #2000/02103-02 06 <br /> Sample ID MW-4 Lab Sample ID 2000-01-0456-004 <br /> MS 2000102103-02 06-004 Extracted 02/03/2000 18 30 Analyzed 02/03/2000 18 30 Dilution 1 0 <br /> MSD 2000/02/03-02 06-005 Extracted 02/03/2000 18 57 Analyzed 02/03/2000 18 57 Dilution 1 0 <br /> Compound Cone u /L Ex Conc u /L Recovery <br /> RPD Ctrl Limits % Fla s <br /> MS MSD Sample MS MSD MS [%] Recovery RPD MS MSD <br /> Methyl tent-butyl ether 631 592 ND 500 500 126 2 6 4 65-165 20 <br /> Surrogates) <br /> 1,2-0ichloroethane-d4 1493 494 1500 500 986 988 76-114 <br /> I <br /> I <br /> I <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Pnnted on 02/04/2000 15 29 Page 15 of 16 <br />