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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 4fi _ Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-01oo <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 141 N EI Dorado Is <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9804G89-03-13 Reported May 18, 1998 <br /> QUALITY—CONTROL DATA-REPORT <br /> Analyte Gasoline <br /> QC Batch#. 701344665 <br /> Analy Method. EPA 8015M <br /> Prep Method EPA 8020M <br /> Analyst <br /> MS/MSD # BLK050498 <br /> Sample Conc 1825 <br /> Prepared Date 5/4/98 <br /> Analyzed Date 5/4/98 <br /> Instrument I D # - <br /> Conc Spiked 1000Ng/L <br /> Result 998 <br /> MS % Recovery 98 <br /> Dup Result 1015 <br /> MSD % Recov 997 <br /> RPD 17 <br /> RPD Limit 0-50 <br /> LCS # LCS050498 <br /> Prepared Date 5/4/98 <br /> Analyzed-Date 5/4/98 <br /> Instrument I D.# - <br /> Conc Spiked 1000 ug/L <br /> LCS Result 1071 <br /> LCS % R@COV - 107 <br /> 53-146 <br /> LCS 79-127 <br /> Control Lypits <br /> JectPlease Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> NALYTICAL 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 <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to math <br /> interference,the LCS recovery is to be used to validate the batch <br /> ner <br /> nager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9804389 BLA <2> <br />