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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (650) 364 96W FAX(650)364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �rill� Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Project ID Unocal SS#5886 v t <br /> 6747 Sierra Court, Ste J Matrix Liquid fi <br /> Dublin, CA 94568 <br /> 'SAttention Deanna Harding Work Order# 9803G82-02-09 Reported Apr 15, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Diesel <br /> OC Batch# GCO32798CHBPEXB <br /> Analy Method EPA 8015M <br /> Prep Method EPA 3510 <br /> Analyst A.Porter <br /> BS/BSD# BLK032798 <br /> Sample Conc N D <br /> Prepared Date 3/27/98 <br /> Analyzed Date 3/31/98 <br /> Instrument LD # GCHP19 <br /> Cone Spiked 1000lig/L <br /> Result Soo <br /> BS % Recovery 80 <br /> 4tDup Result 780 <br /> SD % Recov 78 <br /> RPD 25 <br /> RPD Limit 0-50 <br /> LCS # <br /> Prepared Date <br /> Analyzed Date <br /> Instrument I.D # <br /> Cone Spiked <br /> LCS Result- <br /> LCS %Recov.. <br /> 50.150 <br /> LCS 60-140 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-fres matrix that is analyzed using the same reagents, <br /> SEQUO 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 /> regory <br /> rolect Manager '*MS-Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9803G82 GET <7> <br />