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CHROMALAB, INC. <br /> 1 <br /> Environmental Services(SDB) — <br /> April 2 , 1998 Submission # 9803309 <br /> AQUA SCIENCE ENGINEERS INC <br /> Atten Charlie Rous <br /> ' Protect UNOCAL Protect# 3254 <br /> Received March 20, 1998 <br /> re One sample for Gasoline BTEX analysis <br /> Method SW846 8020A Nov 1990 / 8015Mod <br /> Client Sample TD BH-E <br /> 1Spl# 176536 Matrix WATER <br /> Sampled March 19 , 1998 Run# 11922 Analyzed April 2 , 1998 <br /> REPORTING BLANK BLANK DILUTION <br /> 1RESULT LIMIT RESULT SPIKE FACTOR <br /> ANALYTE (ua/L) (ug/L) (ug/L) M <br /> GASOLINE 120000 10000 N D 94 200 <br /> BENZENE 20000 100 N D 92 200 <br /> TOLUENE 9700 100 N D 95 200 <br /> ETHYL BENZENE 5200 1.00 N D 101 200 <br /> XYLENES 18000 100 N D 91 200 <br /> 1• <br /> Vincent Vancil Michael Verona <br /> Chemist Operations Manager <br /> 1 <br /> 1 <br /> 510-837-4853 <br /> ' 1220 Quarry Lane• Pleasanton, California 94566-4756 PMV1320 BIEXQCOC <br /> (510) 484-1919• Facsimile (510)484-1096 V1HLE ` <br /> Federal ID #68-0140157 <br />