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STL ChromaLab Submission # 200143-0566 <br /> Environmental Services(CA 1094) <br /> To Wright Environmental Services Inc Test Method 8015M <br /> 8020 <br /> Attn Maria Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001103130-01 02 <br /> LCS 2001103130-01 02-006 Extracted 03/30/2001 10 38 Analyzed 03/30/2001 10 38 <br /> LCSD 2001103130-0102-007 Extracted 03/30120011109 Analyzed 03130120011109 <br /> Compound Conc. [ug/L.] Exp Conc [ug/L] Recovery[%] RPD Ctrl Limits [%] I Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS I LCSD <br /> Gasoline 513 490 500 500 1026980 46 75-125 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene-Fl 530 515 Soo 500 1060 103 0 50-150 <br /> 1220 Quarry Lane`Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 04/03/2001 16 18 Page 5 of 5 <br />