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Sequoia 680 Chesapeake dnve Redwood Cary,CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N VASet Lane Walnut Creek CA 94598 (510) 988 9600 FAX(51 o)gas 9673 <br /> Analytical 819 Sinker Avenue,Suite a Sacramento,CA 95834 (916) 921 9600 FAX(916)921.0100 <br /> �°�"^{.y,w..;rµs{�vrYr.,,,.,.Y„;,M,Ysrcre <br /> Gemer Ryan/G i.GY ,v '- <br /> eostrat 1 ry ,uHN.f ri< ' Kv x�:.�.v4b,.�rft���4�At s„s., N,��.,x.A{ A,Y;�-�< „� <br /> eg es Client Project 1D Unocal SS#5886 ``” °' '" ' '" ' "`� ' <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna <br /> {„HYardiAng lWork Order# 9803G84-11 Y <br /> Reported Apr 15, 1 <br /> � P 998; <br /> ,k <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. MTBE <br /> QC Batch}#. MS033198MTBEF3A <br /> Analy. Method- EPA 8260 <br /> Prep Method NA. <br /> Analyst E Manuel <br /> MS/MSD# 98031-10602 <br /> Sample Conc • 39 <br /> Prepared Date <br /> Analyzed Date 3/31/98 <br /> lstrument I D #, F3 <br /> Conc. Spiked: 50ue/L <br /> Result, 56 <br /> AS % Recovery 104 <br /> Result 56 <br /> M .6 Recov 104 <br /> RPD 00 <br /> RPD Limit 0.25 <br /> LCS # LCSO40198 <br /> 'repared Date 4/1/98 <br /> Analyzed Date 4/1/98 <br /> trument I D #. F3 <br /> Conc. Spiked 50 jig/L <br /> LCS Result 52 <br /> .CS % Recov 104 <br /> M140 <br /> LCS 70-130 <br /> ontrol Limits <br /> Please Nota <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> OU01 IALYTICAL 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 specs ied control limits due to matrix <br /> interference,the LCS recovery Is to be used to validate the batch <br /> reg <br /> sect Manager *'MS-Matrix Spike,MSD-MS Duplicate, RPE)=Reladve %Difference <br /> 9803G82 GET <10> <br />