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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> [' z) <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)983-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1 Analytical 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 1071 N Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 - - <br /> Attention Fran Thie Work Order# 98071-185 -01-03 Reported Aug 19, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS073198MTSE1-16A <br /> Analy Method EPA 8260 <br /> Prep Method NA <br /> Analyst L Zhu <br /> MS/MSD# 9807H7004 <br /> Sample Conc ND <br /> Prepared Date 7/31/98 <br /> Analyzed Date 7/31/98 - - - <br /> Instrument I D # 1-16 <br /> Conc Spiked 50Ng/L <br /> Result 52 <br /> MS %Recovery 104 <br /> Dup Result. 53 <br /> MSD %Recov 106 . <br /> RPD 19 <br /> RPD L-imi# a25 <br /> rt <br /> LCS# LC8073198 <br /> Prepared Date 7/31/98 <br /> Analyzed Date 7/31/98 <br /> Instrument I.D # X16 <br /> Conc Spiked 50pg/L <br /> LCS Result 54 <br />- LCS %Recov 108 " <br /> $0-140 <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 /> SEOI 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 fail within specified control limits due to matrix . <br /> interference,the LCS recovery is to be used to validate the batch <br /> Pegg �Pe er <br /> rojeb anager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 98071-185 BLA <1> <br />