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CHROMALAB, INC. <br /> Environmental Services(SDB) - - <br /> March 31, 1998 Submission # 9803309 <br /> AQUA SCIENCE ENGINEERS INC <br /> ' Atten Charlie Rous <br /> Pro]ect UNOCAL Proaect# 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@6 51 <br /> ' Spl# 176543 Matrix SOIL <br /> Sampled March 19, 1998 Run# 11898 Analyzed March 23 , 1998 <br /> REPORTING BLANK BLANK DILUTION <br /> RESULT LIMIT RESULT SPIKE FACTOR <br /> ANALYTE (ug/Kg) (ug/Kq) (ug/Kg) (o) <br /> TERTIARY BUTYL ALCOHOL, (TBA) N D 25 N D -- - 5 <br /> METHYL TERTIARY BUTYL ETHER 400 25 N D 972 5 <br /> (MTBE) <br /> DI-ISOPROPYL ETHER (DIPS) N D 50 N D - 5 <br /> ETHYL TERTIARY BUTYL ETHER N D 25 N D -- 5 <br /> (ETBE) _ A <br /> TERTIARY AMYL METHYL ETHER N D 25 N D 5 <br /> (TAME) <br /> to Reporting lamsts raised due to matrix interference <br /> '94Michael Lee 4Michael Verona <br /> ' Chemist Operations Manager <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 510-8 3 7-4 8 53 ru 93127 1220 Quarry Lane• Pleasanton, California 94566-4756 <br /> ' V060 0[106405 MIHLEE 77 <br /> (510) 484-1919 • Facsimile (510) 4$4-1096 <br /> Federal 1D #68-0140157 <br />