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• Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> `� 404 N Wtget Lane Walnut Creek CA 94598 (5 t0) 988 9600 FAX (510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 961025-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 961OH37-05 Reported Nov 14, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS110896MTBEF3A <br /> Analy Method EPA 8260 <br /> Prep Method N/A <br /> Analyst M Williams <br /> MS/MSD # 961OH3709 <br /> Sample Conc 25 <br /> Prepared Date <br /> Analyzed Date 11/8/96 <br /> Instrument i D # F3 <br /> Conc Spiked 50ug/L <br /> Result 47 <br /> MS % Recovery 89 <br /> Dup Result 50 <br /> MSD % Recov 95 <br /> RPD 62 <br /> RPD Limit 0-25 <br /> LCS # VDB111196 <br /> Prepared Date - <br /> Analyzed Date 11/11/96 <br /> Instrument I D # F3 <br /> Conc Spiked 50ug/L <br /> LCS Result 50 <br /> LCS % Recov 100 <br /> MS/MSD 60140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> 116SEQUIA AMALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> I fortified with known quantities of specific compounds and subjected to the entire analytical procedure if <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> tit mterference,the LCS recovery is to be used to validate the batch <br /> Peggyl, elner <br /> Projept anager ww MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 961OH37 BLA �6> <br />