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� STL Submission# 2003-11-0508 <br /> Gas/BTEX Compounds by 8015M18021 <br /> ' Clayton Group Services, Inc <br /> Attn Mat Reimer <br /> ' 6920 Koll Center Parkway, Suite 216 <br /> Pleasanton CA 94566 <br /> Phone (925)426-2600 Fax (925)426-0106 <br /> ' Project 80-02263 00 200 Received 11/13/2003 15 10 <br /> The Learner Company <br /> 1 Site 2711 Navy Drive, Stockton, CA <br /> Batch QC Re ort <br /> Prep(s) 5030 Test(s) 8021 B <br />' Laboratory Control Spike Water QC Batch#2003111120-01 05 <br /> LCS 2003111120-01 05-006 Extracted 11/20/2003 Analyzed 11/20/2003 08 46 <br /> LCSD 2003111120-01 05-007 Extracted 11/20/2003 Analyzed 11/20/2003 09 18 <br />' Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 827 868 1000 827 868 4 8 77-123 20 <br /> Toluene 89 2 933 1000 89 2 933 4 5 78-122 20 <br /> Ethyl benzene 836 86 6 1000 836 86 6 3 5 70-130 20 <br /> Xylene(s) 266 276 300 887 92 0 3 7 75-125 20 <br />' Surrogates(s) <br /> Tnfluorotoluene 446 471 500 89 2 94 2 58-124 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Severn Trent Laboratories, Inc 11121/2003 14 12 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A Pad ofS—r,Vent Pw Tel 925 484 1919 Fax 925 484 1096'www stl-inc corn`CA DHS ELAP#2496 Page 9 of 10 <br />