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0 WE S T T Submission: 2005-10-0515 <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience- Irvine <br /> Attn.: Anju Far-fan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone: (949)341-7440 Fax: (949) 753-0111 <br /> Project: 41050001/FA20 Received: 10/25/2005 16:05 <br /> Conoco Phillips#11195 <br /> Site: 16500 S. Interstate 5, Lathrop, CA <br /> Batch QC Report <br /> Preps) _- 5030& Test(s):826oB <br /> Matrix'Spike(MS 1 MSD] Water QC Batch#2005110129-1A.71 <br /> MW-3 »MS fab ID. 2005-10-0515,014 <br /> 2005/10/29=1&71.-052 Fxdracted:.10/2912005. Analyzed: 10/29/200512;52 <br /> Dilution: 4.00 <br /> ..'.MSD: '2005/10!29-1A.71-019 Extracted- 10/29/2005 Analyzed; 10/2912005 13:19 <br /> Dilution: 4.00 <br /> Compound Cone. ug/L SpkIeve Recovery% Limits% Flags <br /> MS MSD Sample ug/L MS MSD RPD Rec. RPD MS MSD <br /> Methyl tert-butyl ether 102 105 20.1 100 81.9 84.9 3.6 65-165 20 <br /> Benzene 92.4 91.7 NO 100 92.4 91.7 0.8 69-129 20 <br /> Toluene 88.7 93.2 ND 100 88.7 93.2 4.9 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 405 409 500 81.0 81.8 73-130 <br /> Toluene-d8 484 488 500 96.8 97.6 81-114 <br /> I <br /> I <br /> Severn Trent Laboratories, Inc. 10/3112005 15:29 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 <br /> ApartMSev—T—[Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.corn`CA DHS FLAP#2496 Page 35 of 37 <br />