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CHRQMALAB, INC. <br /> Environmental Services(SDB) <br /> April 9 , 1998 Submission # 9803309 <br /> AQUA SCIENCE ENGINEERS INC <br /> Atten Charlie Rous <br /> Project UNOCAL Project# 3254 <br /> I ' Received March 20 , 1998 <br /> re One sample for Gasoline BTEX analysis <br /> Method SW846 8020A Nov 1990 / 8015Mod <br /> Cl i en t Sample TD BH-G@6 . 51 <br /> Spl# 176546 Matrix SOIL <br /> Sampled March 19 , 1998 Run# 11921. Analyzed April 2 , 1998 <br /> REPORTING BLANK BLANK DILUTION <br /> RESULT LIMIT RESULT SPIKE FACTOR <br /> ANALYTE m K m K m K o <br /> GASOLINE 270 10 N D 109 1 <br /> BENZENE 6 5 0 62 N D 88 1 <br /> ' TOLUENE 1 8 0 62 N D 95 1 <br /> ETHYL BENZENE 1 8 0 62 N D 102 1 <br /> XYLENES 2 3 0 62 N D 96 1 <br /> lieNote Surrogate Recovera.es biased high due to Hydrocarbon co-elution <br /> Vincent Vancil Michael Verona <br /> Chemist Operations Manager <br /> 1220 Quarry Lane• Pleasanton, California 94566-4756 PMV1350 BTEXoCC <br /> (510) 484-1919 • Facsimile (510) 484-1096 GARY <br /> Federal ID #68-0140157 <br />