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ST L <br /> • Gas1BTEX Compounds by 8015M18021 Submission 2004-12-0591 <br /> RMC Pacific Materials, Inc <br /> Ann Robert Aldenhuysen <br /> P O Box 5252 <br /> Pleasanton, CA 94566 <br /> Phone (925) 426-2261 Fax (925) 426-2231 <br /> Project Kerlmger Received 12/15/2004 16 08 <br /> Batch QC Re ort <br /> Prep(s) 5030 Test(s) 8021 B <br /> Laboratory Control Spike Water QC Batch #2004112127-01 05 <br /> LCS 2004112127-01 05-005 Extracted 12/27/2004 Analyzed 12/27/2004 09 24 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 507 500 1014 77-123 20 <br /> Toluene 503 500 1006 78-122 20 <br /> Ethyl benzene 48 9 50 978 70-130 20 <br /> Xylene(s) 151 150 1007 75-125 20 <br /> Surrogates(s) <br /> Trifluorotoluene 559 500 111 8 58-124 <br /> • Severn Trent Laboratories, Inc 12128120041427 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton CA 94566 <br /> A fan of Severn Trent Pic Tel 925 484 1919 Fax 925 484 1096"www stl-inc com"CA DWS ELAP#2496 Page 8 of 10 <br />