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STLSubmission# 2003-09-0$51 <br /> Gas/BTEX/MTBE by 82608 (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 /> Protect 245-0783 Received 09/24/2003 17 23 <br /> 98996184 <br /> Site 2575 Country Club,Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Controll Spike Water QC Batch#2003109129-1Z 65 <br /> LCS 2003109129-1Z 65-059 Extracted 09/29/2003 Analyzed 09/29/2003 13 18 <br /> LCSD 2003109129-1 Z 65-036 Extracted 09/29/2003 Analyzed 09/29/2003 15 36 <br /> Compound Conc ug/L Exp Conc Recovery% RPD C10 Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 280 292 25 1120 1168 42 69-129 20 <br /> Toluene 298 288 25 1192 1152 34 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 248 229 25 992 916 80 65-165 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 479 435 500 958 870 76-130 <br /> Toluene-d8 559 489 500 1 111 8 1978 1 78-115 <br /> Severn Trent Laboratories, Inc 101011200315 26 <br /> STL San Francisco•1220 Quarry Lane Pleasanton CA 94566 <br /> A cid 3-y Tml Pf Tel 925 484 1919 Fax 925 484 1096'www stl-mc cam'CA DHS FLAP#2496 page 11 of 13 <br />