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STLSubmission# 2003-08-0629 <br /> Gas/BTEX/MTBE by 8260B (C6-C12) <br /> Cambna 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 /> i <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2003109102-1 B 64 <br /> LCS 2003109102-1 B 64-017 Extracted 09/02/2003 Analyzed 09/02/2003 10 17 <br /> LCSD 2003109102-1 B 64-039 Extracted 09/02/2003 Analyzed 09/02/2003 10 39 <br /> Compound Conc ug/L Exp Conc Recovery% RPDJ Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 21 9 208 25 876 832 52 69-129 20 <br /> Toluene 224 214 25 896 856 46 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 189 194 25 75 6 776 26 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 423 420 500 846 84 0 76-130 <br /> Toluene-d8 489 1481 500 97 8 96 2 1 178-115 <br /> Severn Trent Laboratories, Inc 09/03/2003 15 14 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> Apart of Sw—r hens Pk Tel 925 484 1919 Fax 925 484 1096•www stl-inc corn'CA OHS ELAP#2496 Page 10 of 11 <br />