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STLSubmission 2005-07-0366 <br /> Gas/BTEX/MTBE by 82608 <br /> SECOR-Sacramento <br /> Attn Kimber Collins <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone (916) 861-0400 Fax (916) 861-0430 <br /> Project 77CP 60004 04 5886 Received 07/13/2005 16 20 <br /> Conoco Philips Site# 5886 <br /> Site 3701 W March Lane, Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 82606 <br /> Matrix Spike ( MS/ MSD ) Water QC Batch #2005/07/20-1 C 68 <br /> MS/MSD <br /> Lab ID 2005-07-0319-001 <br /> MS 2005107/20-1C 68-028 Extracted 07/20/2005 Analyzed 07/20/2005 10 28 <br /> Dilution 1000 <br /> MSD 2005/07120-1 C 68-054 Extracted 07/20/2005 Analyzed 07/20/2005 10 54 <br /> Dilution 1000 <br /> Compound Conc ug/L Spk Level Recovery% Limits% Flags <br /> MS MSD Sample ug/L MS MSD RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 353 349 939 250 1036 1020 1 6 65-165 20 <br /> Benzene 423 431 154 250 1076 1108 29 69-129 20 <br /> Toluene 275 281 2 71 250 1089 1113 22 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 411 394 500 82 2 788 73-130 <br /> Toluene-d8 493 495 500 986 990 81-114 <br /> Severn Trent Laboratories, Inc 07/26/2005 15 34 <br /> STL San Francisco' 1220 Quarry Lane Pleasanton CA 94566 <br /> A part of Se—n hent Plc Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS FLAP#2496 Page 9 of 10 <br />