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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> May 7, 1998 Submission #: 9804438 <br /> HARDING LAWSON (SACRAMENTO) <br /> Atten Gary Haeck <br /> Project: NEWARK SIERRA/STOCKTON Project#: 40344 . 03 <br /> Received- April 29, 1998 <br /> re One sample for BTEX analysis <br /> ' Method. SW846 8020A Nov 1990 <br /> Client Sample ID. SB-1-10 . 0 <br /> Spl#: 183158 Matrix- SOIL <br /> ' Sampled- April 28 , 1998 Run#:12558 Analyzed: May 4 , 1998 <br /> REPORTING BLANK BLANK DILUTION <br /> - - RESULT LIMIT RESULT SPIKE FACTOR <br /> ANALYTE (mar/Ka) (MQ/Kar) (mg/Kg)._. M <br /> BENZENE N D 0 0050 N.D. 86 1 <br /> TOLUENE 0 073 0 0050 N.D 87 1 <br /> ' ETHYL BENZENE 0 011 0 . 0050 N D 83 1 <br /> XYLENES 0 061 0 0050 N D 87 1 <br /> Note Surrogate Recoverses demonstrate Matrix interference <br /> Vincent Vancil Michael Verona <br /> Chemist Operations Manager <br />?—q916-364-5633 <br /> 1220 Quarry Lane • Pleasanton, California 94566-4756 GCV1320 BTEXQCO220 <br /> (510) 484-1919 • Facsimile (510) 484-1096 VINCEO935 <br /> Federal ID #68-0140157 <br />