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STL ChromaLab Submission #- 2001-040459 <br /> Environmental Services(CA 1094) <br /> To Wright Environmental Services Inc Test Method 8015M <br /> 8020 <br /> Attn Mana Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX Compounds by 8015M18020 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001/04123-01 02 <br /> LCS 2001104123-01 02-006 Extracted 04/23/2001 09 39 Analyzed 04/23/2001 09 39 <br /> LCSD 2001104123-0102-007 Extracted 04123/2001 10 10 Analyzed 04123120011010 <br /> Compound Conc [ug/L] Exp Conc [ug/L] Recovery[%] RPD Ctrl Limits[%] Flags <br /> LCS LCSD I LCS I LCSD LCS i LCSD [96) Recovery RPD LCS LCSD <br /> Gasoline 478 471 500 I 500 95 6 942 15 75-125 20 <br /> Surrogate(s) <br /> 4-Bromoftuorobenzene-FII 504 1 497 I 500 ! 500 110081 994 50-150 <br /> • <br /> 1220 Quarry Lane•Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919•Facsimile (925)484-1096 <br /> Printed on o4/2612001 1124 Page 36 of 42 <br />