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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (915)988.9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste.D Petaluma.CA 94954 (707)791-1865 FAX(707)792-034Z <br /> --- - -- ---- ----: is;�::::?:::;;;<.::r::::r: r:r::a:.::•o;o- :<s:>::::-:;::.::.:::_:::2s<: - --- is E:i2i: :::::.:.....i :2 ii:i S'5: :'fi::-?::%:isa;:'?E:i<:i: ;:-isii:::3iY:i:::::ioi'i<:ii:`3?5:,•'::21 <br /> ejnfelder Client project ID: 40-3202-01 <br /> :..780 Chadbourne Rd., Ste. D Matrix: Water <br /> Fairfield, CA 94585 <br /> Attention: Randy Wheeler QC Sample Group: S809340 Reported: Oct 7, 1998;; <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> MTBE <br /> Method: EPA 8260 <br /> Analyst: N. Nelson <br /> Concentration <br /> Spiked: 50 ug/L <br /> LCS Batch#: LCS100698 <br /> Date Prepared: 10/06/98 <br /> Date Analyzed: 10/06/98 <br /> Instrument I.D.#: GC/MS-2 <br /> LCS % <br /> Recovery: 110 <br /> Skontrol Limits: 65-135% <br /> MS/MSD <br /> Batch #: 8100408 <br /> I <br /> Date Prepared: 10/07/98 <br /> Date Analyzed: 10/07/98 <br /> Instrument E.D.#: GC/MS-2 <br /> Matrix Spike <br /> % Recovery: 102 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 106 <br /> Relative% <br /> Difference: 3.8 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUr ANALYTICAL. preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> ' validation of sample batch results. Due to matrix effects,the QC limits for IVISIMSD's are advisory only <br /> and are not used to accept or reject batch results. <br /> i a C. Schneider <br /> jest Manager/Sacramento Laboratory <br /> S809340.KLA <5> <br />