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• ' 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364.9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92t-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategles Client Project ID Former Unocal SS #2859 <br /> `6747 Sierra Court, Ste J Matrix Liquid <br /> "Dublin, CA 94568 , <br /> `Attention Deanna Harding Work Order # 9806C89 01-06 Reported Jul 23, 1998 <br /> 9806C90 07-10 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Redox <br /> OC Batch#. IN061998149800A <br /> Analy Method: ATSM E)149876 <br /> Prep Method- <br /> Analyst K Cesar <br /> MS/MSD #. 9806C9010 <br /> Prepared Date 6/19/98 <br /> Analyzed Date 6/19/98 <br /> Instrument I D #. MANUAL <br /> MS % Recovery 140 mV <br /> MSD % Recov 140 mV <br /> RPD 00 <br /> RPD Limit. 0-20 <br /> LCS#- LCS061998 <br /> Prepared Date: 6/19/98 <br /> Analyzed Date 6/19/98 <br /> Instrument I D # MANUAL <br /> Conc. Spiked. 480 mV <br /> LCS Result: 460 <br /> LCS %Recov 96 <br /> 75-125 <br /> LCS 80-120 <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 /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matnx spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure It <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 /> Tod Granicher <br /> Project Manager "*MS=Matrix Spike,MSD MS Duplicate,RPO=Relative%Difference 9806089 GET e4s <br />