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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> CD 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> %07fl nal y}y cal 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <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 # 961OH37-06-07 Reported Nov 14, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS110196826OFSA <br /> Analy Method EPA 8260 <br /> Prep Method N/A <br /> Analyst L Duong <br /> MS/MSD # 9611J9701 <br /> Sample Conc N D <br /> Prepared Date 11/1/96 <br /> Analyzed Date 11/1/96 <br /> Instrument I D # F3 <br /> Conc Spiked 50yg/L <br /> Result 48 <br /> MS % Recovery 96 <br /> Dup Result 50 <br /> MSD % Recov 100 <br /> RPD 41 <br /> RPD Limit 0-25 <br /> LCS # VDB110796 <br /> Prepared Date - <br /> Analyzed Date 11/7/96 <br /> Instrument I D # F3 <br /> Conc Spiked 50yg/L <br /> LCS Result 54 <br /> LCS % Recov 108 <br /> MS/MSD 60140 <br /> LCS 70 130 <br /> Control Limits <br /> Please Note <br /> n The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> SEQUOIA NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> j f 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Peglgy enner <br /> Project Manager '*MS=Matrix Spike, MSD=MS Duplicate RPD=Relabve%Difference 961OH37 BLA <5> <br />