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STL <br /> Fuel Oxygenates by 8260Submission 2005-05-0037 <br /> ' B <br /> Aqua Science Engineers, Inc <br /> ' Attn Dave Allen <br /> 208 West EI Pintado Road <br /> Danville, CA 94526 <br /> Phone (925) 820-9391 Fax (925) 837-4853 <br /> Project 3254 Received 05/02/2005 15 50 <br /> Singh <br /> ' Site Tracy, CA <br /> ' Prep(s) 5030B Test(s) 8260B <br /> Sample ID MW-4 Lab ID 2005-05-0037-3 <br /> Sampled 04/29/2005 12 55 Extracted 5/1312005 09 47 <br /> Matrix Water QC Batch# 2005105113-01 64 <br /> pH <2 <br /> ' Compound Conc RL Unit Dilution Analyzed Flag <br /> Gasoline 97 50 ug/L 1 00 05/13/2005 09 47 Q6 <br /> tert-Butyl alcohol (TBA) ND 5 0 ug/L 1 00 05/13/2005 09 47 <br /> II '• Methyl tert-butyl ether(MTBE) 18 0 50 ug/L 1 00 05/13/2005 09 47 <br /> Di-isopropyl Ether(DIPE) ND 1 0 ug/L 1 001 05/13/2005 09 47 <br /> Ethyl tert-butyl ether(ETBE) ND 0 50 ug/L 1 00 05/13/2005 09 47 <br /> tert-Amyl methyl ether(TAME) 1 7 0 50 ug/L 1 00 05/13/2005 09 47 <br /> Benzene ND 0 50 ug/L 1 00 05/13/2005 09 47 <br /> Toluene ND 0 50 ug/L 1 00 05/13/2005 09 47 <br /> Ethylbenzene ND 0 50 ug/L 1 00 05/13/2005 09 47 <br /> Total xylenes ND 1 0 ug/L 1 00 05/13/2005 09 47 <br /> Surroga te{s) <br /> 1,2-Dichloroethane-d4 119 5 73-130 % 1 00 05/13/2005 09 47 <br /> Toluene-d8 1056 81-114 % 1 00 05/13/2005 09 47 <br /> 1 <br /> Severn Trent Laboratories, Inc 05118120051651 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> A 1,rt of Severn Tmm PIC Tel 925 484 1919 Fax 925 484 1096"www stl-inc corn-CA DHS ELAP*2496 Page 4 of 12 <br />