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Sequoia 680 Chesapeake Drive Rcdwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N WLget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> r <br /> Blaine Tech Services, Inc Client Project ID Shell, Stockton /960820-K2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 Reported Sep 11, 1996 <br /> Attention Jim Keller Work Order# 9608E67-04 P <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> CC Batch# MS0906968260F2A <br /> Analy Method EPA 8260 <br /> Prep Method NIA <br /> Analyst L. Duong <br /> MS/MSD # 96095901 <br /> Sample Cone N D <br /> Prepared Date 9/6/96 <br /> Analyzed Date 9/6/96 <br /> Instrument I D # F2 <br /> Cone Spiked 10 ug/L <br /> Result 82 <br /> MS % Recovery 82 <br /> Is Dup Result 78 <br /> MSD % Recov 78 <br /> RPD 71 <br /> RPD Limit 0-25 <br /> LCS # VRB090696 <br /> Prepared Date - <br /> Analyzed Date 9/6/96 <br /> Instrument I D # F2- <br /> Cone Spiked long/L <br /> LCS Result 9 1 <br /> LCS % Recov 91 <br /> M M D 60-140 <br /> LCS 65-135 <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 /> Eopr ALYTICAL 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 1s to be used to validate the batch <br /> g <br /> Protect Manager ""MS=Matrix Spike MSD=MS Duplicate, RPD=Relative%Difference 9608r=67 BLA <3> <br />