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STLSubmission# 2003-11-0593 <br /> Gas/BTEX Compounds by 8015M18021 <br /> RMC Pacific Materials, Inc <br /> Attn Robert Aldenhuysen <br /> P O Box 5252 <br /> Pleasanton, CA 94566 <br /> Phone (925)426-2261 Fax (925)426-2231 <br /> Project Received 11/17/2003 15 37 <br /> Batch QC Report <br /> Prep(s) 5030 Test(s) 8021 B <br /> Matrix Spike(MS!MSD} Water QC Batch#2003111120-01 01 <br /> MW4 »MS Lab ID 2003-11-0593-002 <br /> MS 2003111120-01 01-017 Extracted 11/20/2003 Analyzed 11/20/2003 16 07 <br /> Dilution 100 <br /> MSD 2003111120-0101-018 Extracted 11/20/2003 Analyzed 11/20/2003 16 39 <br /> Dilution 100 <br /> Compound Cont ug/L Spk Level Recovery% Limits% Flags <br /> MS MSD Sample ug/L MS MSD RPD Rec RPD MS MSD <br /> Benzene 946 885 ND 1000 946 885 67 65-135 20 <br /> Toluene 980 909 ND 1000 980 909 75 65-135 20 <br /> Ethyl benzene 935 930 ND 1000 935 930 05 65-135 20 <br /> Xylene(s) 272 277 ND 3000 907 923 1 7 65-135 20 <br /> surrogate(s) <br /> Tnfluorotoluene 514 477 500 102 8 95 A 58-124 <br /> Severn Trent Laboratories, Inc 11/24/2003 12 13 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A Mn f 6—TroM qe Tel 925 484 1919 Fax 925 484 1096-www stl-inc com'CA 0HS ELAP#2496 Page 7 of 7 <br />