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CHROMALAB, INC. <br /> FnAronmental Services(SDB) <br /> ' April 9, 1999 Submission #: 9904031 <br /> 1 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#: 18259 Instrument: Analyzed: April 7, 1999 <br /> Spiked <br /> Sample Spike Amt Amt Found Spike Recov % <br /> Amount MS MSD MS MSD MS MSD Control % RPD <br /> Analyte (ucr/L) (ucr/L) (ua/L) M M Limits RPD Lim <br /> BENZENE N.D. 50 . 0 50 . 0 49 .3 48 .2 98 . 6 96 . 3 69-129 2 .36 20 <br /> CHLOROBENZENE N.D. 50 . 0 50 . 0 54 . 0 53 .6 108 107 61-121 0 . 93 20 <br /> 1, 1-DICHLOROETHENE N.D. 50 . 0 50 . 0 47 . 9 43 . 1 95 . 8 86 .2 65-125 10 . 5 20 <br /> TOLUENE N.D. 50 . 0 50 .0 46 . 1 45 . 6 92 .2 91 .1 70-130 1 .20 20 <br /> TRICHLOROETHENE N.D. 50 . 0 50 . 0 47 . 2 46 . 6 94 .4 93 .2 74-134 1 .28 20 <br /> ' Sample Spiked: 235140 <br /> Submission #: 9904031 <br /> Client Sample ID: GP-2 <br /> ' Ks sept a: 2W25 1220 Quarry Lane • Pleasanton, Oal'rfornia 94566-4756 <br /> KW Saps C 236026 (925) 484-1919 • Facsimile (925) 484-1096 QCMSPK1229 JIM0 09 444-99 14 <br /> Federal ID#68-0140157 <br />