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680 Chesa eake Dnve Redwood C� CA 94063 415 364 9600 FAX(415 364 9233 <br /> � Sequoia A City O ) <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 %00 FAX(510)988 9673 <br /> Iwo Analytical 819 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <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 /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS11019f38240F3A <br /> Analy Method EPA 8250 <br /> Prep Method N/A <br /> Analyst L Duong <br /> MS/MSD# 9611J9701 <br /> Sample Conc NO <br /> Prepared Date 11/1/96 <br /> Analyzed Date 11/1/96 <br /> Instrument I D # F3 <br /> Conc Spiked 50pg/L <br /> Result 48 <br /> MS % Recovery 96 <br /> Dup Result 50 <br /> MSD % Recov 100 <br /> RPD 41 <br /> RPD Limit 0-25 <br /> LCS # VDB110796 <br /> Prepared Date - <br /> Analyzed Date 11/7/96 <br /> Instrument I D # F3 <br /> Conc 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 /> SJeeNA ICAL 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 /> P **MS=Matrix Spike, MSD=MS Dupiicate, RPD=Relative%D4fference <br /> Pager 961OH36 BLA <7> <br />