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Sequoia 680 Chesapeake Drive Redwood Gry CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(Slo)988 9673 <br /> IIS Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 otoo <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-1918/961024-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> `Attention Jim Keller Work Order# 96101-136-09, 13 Reported Nov 8, 1996 <br /> L r ry05 1 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS1101968240F3A <br /> Analy. Method EPA 8260 <br /> Pree Method N/A <br /> Analyst L Duong <br /> MS/MSD # 9611J97o1 <br /> Sample Cone N D <br /> Prepared Date 11/1/96 <br /> Analyzed Date 11/1/96 <br /> Instrument I D # 1=3 <br /> Cone Spiked 50pg/L <br /> Result 48 <br /> %Recovery 96 <br /> Dup Result 50 <br /> MSD %Recov 100 <br /> RPD 41 <br /> RPD Limit 0-25 <br /> LCS # VD8110796 <br /> Prepared Date - <br /> Analyzed Date 11/7/96 <br /> Instrument I.D # t=3 <br /> Cone Spiked 50ug/L <br /> LCS Result 54 <br /> LCS % Recov 108 <br /> IVIS/MSD 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> 0 The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents <br /> SE O LICALpreparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> 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 /> Pe g eMS=Matrix Spike MSD=MS Duplicate, RPD=Relative%Difference <br /> Pr 11e� nager 56101-136 BLA <7> <br />