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STL <br /> ►� <br /> MGasIBTEX Compounds by 8015M18021 Submission 2044-12-0591 <br /> RMC Pacific Materials, Inc <br /> Attn Robert Aldenhuysen <br /> P Q Box 5252 <br /> Pleasanton, CA 94566 <br /> Phone (925)426-2261 Fax (925)426-2231 <br /> Protect Kerlinger Received 12/15/2004 16 08 <br /> Batch QC Report <br /> Prep(s) 5030 Test(s) 8021 B <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch #2004112/22-1A 05 <br /> MS/MSD Lab ID 2004-12-0546-002 <br /> MS 2004112122-1A 05-008 Extracted 12/22/2004 Analyzed 12/22/2004 12 25 <br /> Dilution 2500 <br /> MSD 2004112122-1A 05-009 Extracted 12/22/2004 Analyzed 12/22/2004 12 58 <br /> Dilution 2500 <br /> Compound Conc ug 1L S k Leve Recove % Limits% Flags <br /> MS MSD Sam le u 1L MS MSD RPD Rec RPD MS MSD <br /> Benzene 1490 1460 174 1250 1053 1029 23 65-135 20 <br /> Toluene 1540 1590 223 1250 1054 1094 37 65-135 20 <br /> Ethyl benzene 1540 1610 315 1250 980 1036 56 65-135 20 <br /> Xylene(s) 5730 6020 2110 3750 965 1043 78 65-135 20 <br /> Surrogate(s) <br /> Trifluorotoluene 548 508 500 11096 11016 1 58-124 <br /> I <br /> Severn Trent Laboratories, Inc 1212812004 14 27 <br /> STL San Francisco*1220 Quart'Lane Pleasanton CA 94506 <br /> A a"n of S—Trent PIC Tel 925 484 1919 Fax 925 484 1 096"www stlanc com"CA DHS FLAP#2496 Page 9 of 10 <br />