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STLSubmission 2045-08-0736 <br /> • Gas/BTEX Compounds by 8015M18021 <br /> CEMEX <br /> Attn Robert Aldenhuysen <br /> P Q 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-Vi 05 <br /> LCS 2005108126-V1 05-004 Extracted 08/26/2005 Analyzed 08/26/2005 10 16 <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 49 6 50 992 77-123 20 <br /> Toluene 49 2 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 5$-124 <br /> • Severn Trent Laboratories, Inc 09112120051443 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> Apart o,srrern Trent Pic Tel 925 484 1919 Fax 925 484 1096"www sil-mc corn`CA DHS FLAP#2496 Page 4 of 5 <br />