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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> February 8, 1999 Submission #: 9902051 <br /> URS GREINER <br /> Atten: Hollis Phillips <br /> ' Project: ARCH RD Project#: 43-00066762 . 004000 <br /> Received: February 3 , 1999 <br /> re: Matrix spike report for Gasoline BTEX analysis . <br /> Method: SW846 8020A Nov 1990 / 8015Mod <br /> Matrix: SOIL <br /> Lab Run#: 17280 Instrument: 3400-4 Analyzed: February 5, 1999 <br /> Spiked <br /> Sample Spike Amt Amt Found Spike Recov % <br /> Amount MS MSD MS MSD MS MSD Control % RPD <br /> Analyte (m4/Kcr) (ma/Ka) (mcr/Kc7) M M Limits RPD Lim <br /> GASOLINE N.D. 0 .434 0 .466 0 . 322 0 . 234 74 . 2 50 . 2 65-135 38 . 6 35 <br /> BENZENE N.D. 0 . 0868 0 . 0931 0 . 0575 0 . 0480 66 . 2 51 . 6 65-135 24 . 8 35 <br /> TOLUENE N.D. 0 . 0868 0 . 0931 0 . 0594 0 . 0497 68 . 4 53 . 4 65-135 24 . 6 35 <br /> ETHYL BENZENE N.D. 0 . 0868 0 . 0931 0 . 0589 0 . 0521 67 . 8 56 . 0 65-135 19 . 1 35 <br /> XYLENES N. D. 0 . 260 0 . 279 0 . 175 0 . 159 67 . 3 57 . 0 65-135 16 . 6 35 <br /> Sample Spiked: 227410 <br /> Submission #: 9902051 <br /> Client Sample ID: B-4-10 <br /> r <br /> r <br /> r <br /> r <br /> MS Smpt #: 227665 1220 Quarry Lane • Pleasanton, California 94566-4756 rEV2 <br /> MSD Smpt #: 227666 (925) 484-1919 • Facsimile (925) 484-1096 QCMSPK1229 VINCE 08-Feb-9911:20 <br /> Federal ID #68-0140157 <br />