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r <br /> STL Submission # 2003-08-0629 <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 08/20/2003 16 00 <br /> 98996184 <br /> Site 2575 Country Club Boulevard, Stockton <br /> Batch QC Report <br /> Prep(s) 5030E Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2003108131-1A 62 <br /> LCS 2003/08/31-1 A 62-055 Extracted 08/31/2003 Analyzed 08/31/2003 10 55 <br /> LCSD 2003108131-1A 62-018 Extracted 08/31/2003 Analyzed 08/31/2003 11 18 <br /> Compound Conc ug/L Exp Conc Recovery% RPDJ Ctrl Limits%I Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 294 30 6 25 1176 1224 4 0 69-129 20 <br /> Toluene 285 298 25 1140 1192 4 5 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 309 295 25 1236 1180 4 6 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichlorcethane-d4 479 462 500 95 8 924 76-130 <br /> Toluene-d8 505 512 500 101 0 11024 1 78-115 <br /> Severn Trent Laboratories, Inc 09/03/2003 15 14 <br /> STL San Francisco' 1220 Quany Lane Pleasanton CA 94566 <br /> A Part ni Sworn;npni Alp Tel 925 484 1919 Fax 925 484 1096'www stl-inc com`CA DHS ELAP#2496 Page 9 of 11 <br />