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1 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 41) 404 N W%et Lane Walnut Creek CA 94598 (510) 988 9600 FAX (5 10) 988 9673 <br /> 4%iir <br /> Analytical 919 Stnkcr Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /970610-Z2 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9706585-04 Reported Jun 26, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. MT13E <br /> OC Batch#. MS06199782601`3A <br /> Analy Method EPA 8260 <br /> Prep Method N A <br /> Analyst L Zhu <br /> MS/MSD#: 970699805 <br /> Sample Conc: N D <br /> Prepared Date: 6/19/97 <br /> Analyzed Date: 6/19/97 <br /> Instrument I.D #: MS-F3 <br /> Conc Spiked. 50Ng/L <br /> Result: 44 <br /> % Recovery 88 <br /> Dup. Result: 44 <br /> MSD % Recov 88 <br /> RPD: 00 <br /> RPD Limit: 0-25 <br /> LCS# VDB062397 <br /> Analyst L Duong <br /> Prepared Date 6/23/97 <br /> Analyzed Date: 6/23/97 <br /> Instrument I.D #: F3 <br /> Conc Spiked: 5opg/L <br /> LCS Result. 45 <br /> LCS % Recov.: 90 <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> i <br /> 0 <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 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 /> I <br /> Peggy Penner <br /> Project Manager **MS=Matrix Spike, MSC}=MS Duplicate, RPD=Relative%Difference 9706585 SLA <3> <br />