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Submission 2005-08-0736 <br /> STL <br /> Gas/BTEX Compounds by 8015M/8021 <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 /> Matrix Spike ( MS 1 MSD ) Water QC Batch#2005108126-V1 05 <br /> MS/MSD Lab ID 2005-08-0721 - 001 <br /> MS 2005108126-Vi 05-025 Extracted 08/26/2005 Analyzed 08/26/2005 20 02 <br /> Dilution 1 00 <br /> MSD 2005/08/26-V1 05-026 Extracted 08/26/2005 Analyzed 08/26/2005 20 29 <br /> Dilution 1 00 <br /> Compound Conc u IL S k Levell R ccovetry% Limits% Flags <br /> . MS MSD Sample u /L MS MSD RPD Rec RPD MS MSD <br /> Benzene 495 50 5 ND 50 99 0 1010 2 0 65-135 20 <br /> Toluene 492 505 ND 50 984 1010 26 65-135 20 <br /> Xylene(s) 142 147 ND 150 947 980 34 65-135 20 <br /> Ethyl benzene 474 48 0 NO 50 948 960 13 65-135 20 <br /> Surrogate(s) <br /> Tnfluorotoluene 498 526 500 99 6 145 2 58-i 24 <br /> 0911212405 14 43 <br /> Severn Trent Laboratories, Inc <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 Page 5 of 5 <br /> A part of Severn Trenf P�. Tel 925 484 1919 Fax 925 484 1096*www stl-fnc COM*CA DHS ELAP#2496 <br />