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STT Submission 2004-12-0614 <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 /> Protect Kedinger Received 12116120041412 <br /> Batch QC Report <br /> Prep(s) 5030 Test(s) 8021 B <br /> Matrix Spike ( MS 1 MSD) Water QC Batch#2004112122-01 05 <br /> MS/MSD Lab ID 2004-12-0546 - 002 <br /> MS 2004112122-01 05-008 Extracted 12/22/2004 Analyzed 12/22/2004 12 25 <br /> Dilution 2500 <br /> MSD 2004!12122-01 05-009 Extracted 12/22/2004 Analyzed 12/22/2004 12 58 <br /> Dilution 2500 <br /> . Compound Cone ug!L Spk Leve Recove % Limits°,6 Flags <br /> MS MSD Sample u IL 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 109 4 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 /> Tnfluorotoluene 1548 508 1 1 500 11096 11016 1 158-124 <br /> Severn Trent Laboratories, Inc 12!27!20041405 <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 <br /> A part of Severn Trent Pic Tel 926 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS ELAP#2496 Page 6 of 6 <br />