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r <br /> Sequoia680 Chesapeake Dnve Redwood CIMCA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wiset Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> ,Gettler Ryan/Geostrat"egies Client Project ID Unocal S$4'W6 n x. <br /> ;6747 Sierra Court, Ste J Matrix Liquid <br /> 'Dublin, CA 94568 <br /> Attention Deanna Harding Work Order# 9803G84-11, 12 Reported Apr 15, 1998 , <br /> r.Y v } .}� � 4 r uv i~ r r r vv v • r i u r v <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Diesel <br /> QC Batch# GCO327980HBPEXB <br /> Analy Method BPA 8015M <br /> Prep Method EPA 3510 <br /> Analyst A. Porter <br /> BS/BSD # ELK032798 <br /> Sample Conc N D <br /> Prepared Date 3/27/98 <br /> Analyzed Date 3/31/98 <br /> Instrument LD # GCHP19 <br /> Conc. Spiked 1000ug/L <br /> Result. 800 <br /> BS % Recovery 8o <br /> 6 Dup 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 /> Conc 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-tree matrix that is analyzed using the same reagents, <br /> lirdjiect <br /> QU ALYTICAL 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 /> egory <br /> Manager "*MS=MaVix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9803G82 GET <9> <br />