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Submission # 2004-04-0137 <br /> Gas/BTEX Fuel Oxygenates by 8260B awn 70'1�' <br /> iStratus Environmental Inc 5TL San Francisco <br /> 1220 Quarry Lane <br /> Attn Scott Bittinger Pleasanton, CA 94566 <br /> 3330 Cameron Park Drive, Suite 550 <br /> Cameron Park, CA 95682 Tel (925)484-1919 <br /> Phone (530) 676-6007 Fax (530) 676-6005 Fax (925)484-1096 <br /> www stl-inc corn <br /> Project U6100 Received 04/06/2004 09 45 www chromalab com <br /> BP Site #6100 <br /> Site Patterson Pass Rd , Tracy CA DHS ELAP#2496 <br /> Prep(s) 5030B Test(s) 8260B <br /> Sample ID 6100C21NF-452004 Lab ID 2004-04-0137 - 5 <br /> Sampled 04/05/2004 07 56 Extracted 4/6/2004 23 36 <br /> Matrix Air QC Batch# 2004104106-2C 66 <br /> Compound Cone MDL RL Unit Conc MDL RL Unit Dilution Analyzed Flag <br /> Gasoline 2300 34 50 mg/m3 640 935 14 ppmv 1 00 04/06/2004 23 36 <br /> Benzene 40 0 16 0 50 mg/m3 12 00495 015 ppmv 1 00 04/06/2004 23 36 <br /> Toluene 26 0 14 0 50 mg/m3 6 8 00368 0 13 ppmv 1 00 04/06/2004 23 36 <br /> Ethylbenzene 1 5 015 050 mg/m3 034 0 0342 0 11 ppmv 1 00 04/06/2004 23 36 <br /> • Total xylenes 22 030 1 0 mg/m3 5 0 00670 023 ppmv 100 04/06/2004 23 36 <br /> Methyl tert-butyE other(MTBE) ND 013 0 50 mg/m3 ND 00352 0 14 ppmv 1 00 04/06/2004 23 36 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 1047 76-114 % % 9 00 04/06/2004 23 36 <br /> Toluene-d8 1006 88-110 % % 1 00 04/06/2004 23 36 <br /> 04!13!2004 13 24 STL San Francisco �s Dari of Severn Trent Laboratories Inc Page 6 of 12 <br />