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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N W,get lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �rill� Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 01 o <br /> Blaine Tech Services, Inc Client Project ID Shell, Stockton <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9609337-01 Reported Sep 18, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> GC Batch# MS091096826oF3A <br /> Analy Method EPA 8260 <br /> Prep Method- N/A <br /> Analyst: L.Zhu <br /> MS/MSD #- 96o8J5301 <br /> Sample Conc . N n <br /> Prepared Date: - <br /> Analyzed Date- 9/10/96 <br /> Instrument I D # F3 <br /> Conc Spiked 310Ng/L <br /> Result- 300 <br /> MS % Recovery. 97 <br /> Dup Result 300 <br /> MSD % Recov 97 <br /> RPD 00 <br /> RPD Limit 0-25 <br /> LCS # V08091196 <br /> Prepared Date 9/11/96 <br /> Analyzed Date 9/11/96 <br /> Instrument I D.# F3 <br /> Conc Spiked 50 Mg/L <br /> LCS Result 49 <br /> LCS % Recov. 98 <br /> M 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 /> 0 ANALYTICAL. preparation,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 /> Peg enner <br /> Project Manager **MS=Matrix Spike, MSD=IVIS Duplicate, RPD=Relative%Difference 9609337 BLA -�3> <br />