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CHRQMALAB, INC. <br /> ' Environmental 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-F@6 5 ' <br /> ' Spl# 176545 Matrix SOIL <br /> Sampled March 19, 1998 Run# 11898 Analyzed March 23 , 1998 <br /> REPORTING BLANK BLANK DILUTION <br /> tRESULT LIMIT RESULT SPIKE FACTOR <br /> ANALYTE (ugKq) (uS/Kq) (ug/Kc) M <br /> TERTIARY BUTYL ALCOHOL TBA) N D 25 N D -- 5 <br /> METHYL TERTIARY BUTYL ETHER N D 25 N D 97«2 5 <br /> (MTBE) <br /> DI-ISOPROPYL ETHER (DIPE) N D 50 N D 5 <br /> ETHYL TERTIARY BUTYL ETHER N D 25 N D 5 <br /> (ETRE) <br /> TERTIARY AMYL METHYL ETHER N D 25 N D 5 <br /> (TAME) <br /> Note Expected high .level of MTBE an sample Unable to quantify due to matrix <br /> '. interference <br /> t' Michael Lee Michael Verona <br /> Chemist Operations Manager <br /> 1 <br /> 1 <br /> 510-837-4853 PM 0307 1220 Quarry Lane-' Pleasanton, California 94566-4756 <br /> (510) 484-1919• Facsimile (510) 484-1096 V050 0 000405 MIKLEF 7 1 <br /> Federal ID #68-0140157 <br />