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M NO kM S T L <br /> Submission# 2003-09-0413 <br /> Gas/BTEX/MTBE by 8260B (C6-C12) <br /> Cambria Environmental Emeryville <br /> Attn Cynthia Vasko <br /> 5900 Hollis Street, Ste A <br /> Emeryville, CA 94608 <br /> Phone (510)420-3344 Fax (510)420-9170 <br /> Project 245-0783-003 Received 09/1112003 08 06 <br /> 98996184 <br /> Site 2575 Country Club Blvd, Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2003/09117-1 D 64 <br /> LCS 2003/09/17-1 D 64-016 Extracted 09/17/2003 Analyzed 09/17/2003 09 16 <br /> LCSD 2003109117-1 D 64-038 Extracted 09/17/2003 Analyzed 09/17/2003 09 38 <br /> Compound Conc ug/L Exp Cone Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD %, Rec RPD LCS LCSD <br /> Benzene 221 21 9 25 884 876 09 69-129 20 <br /> Toluene 248 245 25 992 98 0 1 2 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 203 200 25 81 2 80 0 1 5 65-165 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 409 398 500 818 79 6 76-130 <br /> Toluene-d8 1511 1494 1500 11022 1988 1 178-1151 <br /> Severn Trent Laboratories, Inc 0911 812003 12 26 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A Pmn d S.—7-1 Pk Tel 925 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS ELAP#2496 Page 10 of 12 <br />