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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> (i) 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> 11co Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (91 921 9600 FAX(916) 921 0100 <br /> Blaine Tech Services Inc Client Project ID Shell Stockton / 961025-H2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 961 OH38-03 Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS1101968260F3A <br /> Anally Method EPA 8260 <br /> Prep Method N/A <br /> Analyst L Duong <br /> MS/MSD # 9611J9701 <br /> Sample Cone N D <br /> Prepared Date 11/1/96 <br /> Analyzed Date 11/1/96 <br /> Instrument I D # F3 <br /> Conic Spiked 50 pg/L <br /> Result 48 <br /> MS % Recovery 96 <br /> Dup Result 50 <br /> MSD % Recov 100 <br /> RPD 41 <br /> RPD Limtt 0-25 <br /> LCS # VD8110796 <br /> Prepared Date - <br /> Analyzed Date 11/7/96 <br /> Instrument I D # F3 <br /> Conic Spiked 50ug/L <br /> LCS Result 54 <br /> LCS % Recov 108 <br /> MS/MSD 60-140 <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 /> S Q 01A NALYTICAL preparation,and analytical methods employed for the samples The matrix spike Is an aliquot of sample <br /> fortified with known quantities of spec:fic 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 /> Project Manager "*MS=Matrix Spike, MSD=IMS Duplicate, RPO�Relative% Difference 961OH38 BLA <3> <br />