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S5TL Submission 2005-08-0736 <br /> Gas/BTEX Compounds by 8015M18021 <br /> CEMEX <br /> Attn Robert Aldenhuysen <br /> P O Box 5252 <br /> Pleasanton, CA 94566 <br /> Phone (925)426-2261 Fax (925)426-2231 <br /> Project Kerlinger Received 08/25/2005 16 35 <br /> Batch QC Report <br /> Prep(s) 5030 Test(s) 8021 B <br /> Laboratory Control Spike Water QC Batch#2005108126-V1 05 <br /> LCS 2005108126-V1 05-004 Extracted 08/26/2005 Analyzed 08126120051016 <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 496 50 992 77-123 20 <br /> Toluene 492 50 984 78-122 20 <br /> Ethyl benzene 483 50 966 70-130 20 <br /> Xylene(s) 146 150 97 3 75-125 20 <br /> Surrogates(s) <br /> Trifluorotoluene 541 500 1082 1 58-1241 1 <br /> Severn Trent Laboratories, Inc 09/08/2005 08 51 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94566 <br /> Apert-18--,�Tent Pk Tel 925 464 1919 Fax 925 484 1096"www stl-inc cam`CA DHS ELAP#2496 Page 4 of 5 <br />