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® Submission 2005-11-0186 <br /> S T L <br /> Am'. <br /> Gas1BTEX Fuel Oxygenates 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 /> Protect 247-0783-003 Received 11/14/2005 15 15 <br /> 98996184 <br /> Site 2575 Country Club Boulevard, Stockton <br /> �� - Batch QC Report <br /> Prep(s) 50308 Test(s) 82606 <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch #2005111114-2A 62 <br /> EFF >> MS Lab ID 2005-11-0186 - 005 <br /> MS 2005111114-2A 62-031 Extracted 11/14/2005 Analyzed 11/14/2005 19 31 <br /> Dilution 100 <br /> MSD 2005111/14-2A 62-057 Extracted 11/14/2005 Analyzed 11/14/2005 19 57 <br /> Dilution 1 00 <br /> Compound Conc ug Spk Level Recovery% Limits% Flags <br /> MS MSD Sample uglL MS MSD RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 235 202 ND 25 940 808 151 65-165 20 <br /> Benzene 223 213 ND 25 892 852 4 6 69-129 20 <br /> Toluene 252 235 ND 25 1008 94 0 7 0 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 427 416 500 854 832 73-130 <br /> Toluene-d8 477 491 500 954 982 81-114 <br /> Severn Trent Laboratories, Inc 11122/2005 10 28 <br /> STL San Francisco'1220 Quarry Lane, Pleasanton CA 94566 <br /> Apail of Se-m Trent Plc Tel 925 484 1919 Fax 925 484 1096"www stl-inc corn'CA DNS ELAP#E 2496 Page 13 of 16 <br />