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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX 0) 364-9233 <br /> (51 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)98$-9600 FAX{510}988-9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 11W Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707} 792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 2494 Fremont <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9805902 -02-05 Reported May 28, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> GIC Batch# MS051998MTBEF2A <br /> Analy Method EPA 8260 <br /> Prep Method NA <br /> Analyst E Manuel <br /> MS/MSD # 980592401 <br /> Sample Conc 58 <br /> Prepared Date 5/19/98 <br /> Analyzed Date 5/19/98 <br /> Instrument I D # F2 <br /> Conc Spiked 50ug/L <br /> Result 100 <br /> MS % Recovery 84 <br /> Dup Result 100 <br /> MSD%Recov 84 <br /> RPD 00 <br /> RPD Limit 0-25 <br /> LCS # LCS051998 <br /> Prepared Date 5/19/98 <br /> Analyzed Date 5/19/98 <br /> Instrument I D # F2 <br /> Conc Spiked 50 ug/L <br /> LCS Result 53 <br /> LCS %Recov 106 <br /> 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 /> QIA A LYTICAL 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 /> Pegg neer <br /> ct Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9805902 BLA ¢1> <br />