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STL ChromaLab Submission # 2001-05-0013 <br /> Environmental Services(CA 1094) <br /> To Hydro Environmental Tech Test Method 8015M <br /> 8020 <br /> tAttn Cynthia Avaklan Prep Method 5030 <br /> Batch QC Report i <br /> Gas/BTEX <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch #2001105102-01 02 <br />' LCS 2001/05102-01 02-007 Extracted 05/02/2001 10 29 Analyzed 05/02/2001 10 29 <br /> LCSD 2001105102-0102-008 Extracted 05102120011100 Analyzed 05/02/2001 1 1 00 <br />' Compound Conc [ug/L] Exp Conc [ug/L] Recovery[%] RPD Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%� Recovery RPD LCS LCSD <br />' Gasoline 502 498 500 500 1004 99 6 08 75-125 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene-FI 527 529 500 500 1054 1058 50-150 <br /> t <br /> 1 <br /> 1 <br /> 1 <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br />' Telephone (925)484-1919`Facsimile (925)484-1096 <br /> Printed on 05/03/2001 10 39 Page 7 of 7 <br /> 1 <br />