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�l <br /> STL ChromaLab Submission # 2001-01-0332 <br /> Enmronmental Services(CA 1094) <br /> • To Wright Environmental Services Inc Test Method 8015M <br /> 8020 <br /> Attn Chris Palmer Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch #2001101123-01 02 <br /> LCS 2001/01/23-0102-002 Extracted 01/23/2001 11 14 Analyzed 01/23/2001 11 14 <br /> LCSD 2001/01/23-0102-003 Extracted 01/23/2001 11 50 Analyzed 01/23/2001 11 50 <br /> Compound Conc [ug/L] Exp Conc [ug/L] Recovery[%] RPO Ctrl Limits[%] 1 Flags <br /> LCS LCSD LCS LCSD I LCS LCSD [%] Recovery I RPD LCS LCSD <br /> Gasoline 470 512 500 500 940 10241 86 75-125 20 <br /> l Benzene 96 8 987 1000 1000 968 9871 1 9 I 77-123 20 <br /> Toluene 928 948 1000 1000 928 9481 2 1 78-122 20 <br /> Ethyl benzene 978 101 1000 1000 978 101 0 1 32 70-130 20 <br /> Xyiene(s) 279 288 300 300 930 9601 32 75-125 20 <br /> I <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 509 523 500 500 11018 104 6 50-150 <br /> Tnfluorotoluene 441 452 500 500 882 904 58-124 <br /> 4-Bromofluorobenzene-Fi 491 528 500 500 98 2 105 6 50-150 <br /> • <br /> 1220 Quarry Lane"Pleasanton CA 945664756 <br /> Telephone (925)484-1919*Facsimile (925)484-1096 <br /> Printed on 01/25/2001 13 07 Page 18 of 20 <br />