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CHROMALAB, INC. <br /> Enwronmental Services(SOB) — <br /> ' March 31, 1998 Submission # 9803309 <br /> AQUA SCIENCE ENGINEERS INC <br /> Atten Charlie Rous <br /> Project UNOCAL Project#. 3254 <br /> Received March 20, 1998 <br /> re One sample for Fuel Oxygenates by GC/MS analysis <br /> Method EPA SW846 Method 8260 Modified <br /> Client Sample ID BH-D <br /> Spl# 176535 Matrix WATER <br /> Sampled March 19, 1998 Run# 11766 Analyzed March 20 , 1998 <br /> REPORTING BLANK BLANK DILUTION <br /> RESULT LIMIT RESULT SPIKE FACTOR <br /> ANALYTE (ug/L) (u4/L) (ug/L) M „ <br /> TERTIARY BUTYL ALCOHOL (TBA) N D 2500 N D - - 500 <br /> ' METHYL TERTIARY BUTYL ETHER 59000 2500 N D 900 500 <br /> (MTBE) <br /> DI-ISOPROPYL ETHER (DIPE) N D 5000 N D ` 500 <br /> ETHYL TERTIARY BUTYL ETHER N D 2500 N D - - 500 <br /> ' (ETBE) - - <br /> TERTIARY AMYL ME'T'HYL ETHER N D 2500 N D 500 <br /> (TAME) <br /> e Reporting limits raised due to matrix interference <br /> ' 0'- `a.' <br /> 41 <br /> Michael Lee Michael Verona <br /> Chemist Operations Manager <br /> 1 <br /> 1 <br /> • <br /> 510-837-4853 PM 03127 1220 Quarry Lane • Pleasanton, California 94566-4756 <br /> 4060 Q OGOE05 MlNLfE 1 <br /> ' (510) 484-1919 • Facsimile (510) 484-1096 <br /> Federal ID #68-0140157 <br />