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1 - <br /> - Submission #: 2001-05-0013 <br /> STL ChromaLab <br /> Environmental Services(CA 1094) <br /> To Hydro Environmental Tech Test Method 8020 <br /> Attn Cynthia Avaklan Pre} Method 5030 <br />' Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike(LCSILCSD) Water QC Batch#2001105102-01 02 <br />' LCS 2001105102-01 02-005 Extracted 05/0212001 09 26 Analyzed 05/02/2001 09 26 <br /> LCSD 2001105102-01 02-006 Extracted 05/02/2001 09 57 Analyzed 05/02/2001 09 57 <br /> Compound Conc (ug/L] Exp Conc [ugtL] Recovery[%] RPD Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD ]%] Recovery RPD LCS LCSD <br /> Benzene 100 953 1000 1000 1000 95 3 48 77-123 20 <br />' Toluene 101 972 1000 1000 1010 972 38 78 122 20 <br /> Ethyl benzene 987 95 9 1000 1000 98 7 95 9 2 9 70-130 20 <br /> Xylene(s) 283 277 300 300 94 3 923 21 75-125 20 <br />' Surrogate(s) <br /> Trnfluorotoluene 564 517 500 500 1128 1034 <br /> 58-124 <br /> 1 <br /> 1 <br /> 1 <br /> 1220 Quarry lane*Pleasanton CA 94566-4756 <br />' Telephone (925)484-1919*Facsimile (925)484-1085 <br /> Printed on 05/03/2001 10 39 Page 6 of 7 <br />