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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> April 7, 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: SOIL <br /> Lab Run#: 18218 Instrument: Analyzed: April 6, 1999 <br /> ' Spiked <br /> Sample Spike Amt Amt Found Spike Recov <br /> Amount MS MSD MS MSD MS MSD Control % RPr <br /> ' Analyte (ucr/Kq) (ucr/Ka) (ucr/Ka) (%) (%) Limits RPD Lis <br /> BENZENE N.D. 93 . 3 97 .6 94 . 0 98 .3 101 101 69-129 0 2C <br /> CHLOROBENZENE N.D. 93 . 3 97 . 6 94 . 1 98 .6 101 101 61-121 0 2C <br /> ' 1, 1-DICHLOROETHENE N.D. 93 . 3 97 . 6 89 . 6 94 . 0 96 . 0 96 . 3 65-125 0 .31 2C <br /> TOLUENE N.D. 93 . 3 97 . 6 91.7 96 .2 98 . 3 98 .6 70-130 0 .30 2C <br /> TRICHLOROETHENE N.D. 93 .3 97. 6 92 . 0 96 .3 98 . 6 98 .7 74-134 0 . 10 2C <br /> 1 <br /> Sample Spiked: 235152 <br /> ' Submission #.- 9904031 <br /> Client Sample ID: GP-2, 7.5 ' <br /> 1 <br /> 1 <br /> 'i MS SWL #: 235610 1220 Quarry Lane • Pleasanton, Cafrfornia 94566-4756 <br /> ueo sept #: 235611 (925)484-1919 • Facsimile (925)484-1096 QCMS"1229 revs 07-Mr-99 10 <br /> Federal ID#68-0140157 <br />