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684sapeake Drive Redwood City,CA 9409 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> !� -i-� 819 Striker Avenue Suite 8 <br /> AnXSacramento CA 95834 (916)92t-9600 FAX(916)921-0100 <br /> u1y naly C i 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)79Z-1865 FAX(707)792-0342 <br />''*Blaine Tech Services, Inc Client Project ID Shell 341 East Main it <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Francis Thie Work Order# 9812C65-01 Reported Jan 6, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS1230988260S2A <br /> Anally Method EPA 8260 <br /> Prep Method EPA 5030 <br /> Analyst: N Nelson <br /> MS/MSD# 8121903 <br /> Sample Conic 85 <br /> Prepared Date 12/31/98 <br /> Analyzed Date 12/31/98 <br /> Instrument I D # GCMS2 <br /> Conc Spiked 50ug/L <br /> Result 132 <br /> MS % Recovery 94 <br /> Dup Result: 135 <br /> MSD %Recov : 100 <br /> RPD 22 <br /> RPD Limit 0-25 <br /> LCS# LCS123098 <br /> Prepared Date. 12/30/98 <br /> Analyzed Date: 12/30/98 <br /> Instrument I D # GCMS2 <br /> Conc Spiked 50{tg/L <br /> LCS Result 51 <br /> LCS %Recov 102 <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> SEQUOIA NAL ICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 4PEI 2 1 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 recove o analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> P ggy ender <br /> P jec anager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9812C65 BLA a2> <br />