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©, STL <br /> Submission# 2004-03-0441 <br /> Gas/BTEX Fuel Oxygenates by 8260B (C6-C92) <br /> Cambria Environmental Sonoma <br /> Attn Joe Neely <br /> 270 Perkins Street <br /> Sonoma, CA 95476 <br /> Phone (707)933-2361 Fax (707)935-6649 <br /> Project 0813 Received 03/12/2004 1140 <br /> SAP#136186 <br /> Site 3725 Tracy Blvd ,Tracy <br /> Batch QC Report <br /> Prep(s) 5030B Test(s),8260B <br /> Laboratory Control Spike Sail QC Batch#2004103115-02.69 <br /> LCS 2004103115-02 69-058 Extracted 03/15/2004 Analyzed 03115/200418 58 <br /> LCBD 2004103/15-02 69-016 Extracted 03/1512004 Analyzed 03/151200418 16 <br /> Compound Conc mg/Kg Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 518 541 500 1036 1082 4 3 69-129 20 <br /> Toluene 52 9 520 500 1058 1040 17 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 545 51 9 500 1090 1038 49 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 445 444 500 890 88 8 70-121 <br /> Toluene-d8 1480 1494 1500 1960 1988 1 181-1171 <br /> Severn Trent Laboratories, Inc 03/18/2004 14 48 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton CA 94566 <br /> Ap.r1 a S�.m Tnre P1. Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS FLAP#2496 Page 4 of 4 <br />