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CHROMALAB, INC. <br /> Environmental SeMces(SDB) <br /> April 9, 1999 Submission #: 9904031 <br /> ' SECOR CONCORD <br /> Atten: TOM CROSBY <br /> ' Project: LYON INVESTMENTS Project#: 70139-004-02 <br /> Received: April 1, 1999 <br /> ' re: Matrix spike report for Volatile Organics by GC/MS analysis . <br /> ' Method: SW846 Method 8260A Sept 1994 <br /> Matrix: WATER <br /> Lab Run#: 18252 Instrument: Analyzed: April 6, 1999 <br /> Spiked <br /> Sample Spike Amt Amt Found Spike Recov <br /> Amount MS MSD MS MSD MS MSD Control % RPD <br /> Analyte (uq/L) (ucr/L) (uq/L) (%) M Limits RPD Lim <br /> ' BENZENE N.D. 50 . 0 50 . 0 48 .4 49 . 1 96 . 9 98 .2 69-129 1 .33 20 <br /> CHLOROBENZENE N.D. 50 . 0 50 . 0 52 .4 53 . 6 105 107 61-121 1 .89 20 <br /> ' 1,1-DICHLOROETHENE N.D. 50 . 0 50 . 0 47 .2 44 . 9 94 .4 89 . 8 65-125 4 . 99 20 <br /> TOLUENE N.D. 50 . 0 50 . 0 45 . 6 46 . 1 91 .2 92 .2 70-130 1 . 09 20 <br /> TRICHLOROETHENE 0 . 62 50 . 0 50 . 0 46 . 6 46 .4 92 . 0 91 . 5 74-134 0 .54 20 <br /> ' Sample Spiked: 235291 <br /> ' Submission #: 9904039 <br /> Client Sample ID: F92A <br /> 1 <br /> HS Supt #: 235896 1220 Quarry Lane • Pleasanton, Calffornia 94566-4756 <br /> MSD Smpt u: 235897 (925) 484-1919 • Facsimile (925) 484-1096 GCMSPK7229 JIMS 09-AP 9914 <br /> Federal ID#68-0140157 <br />