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• 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walrwt Creek CA 94598 (925)988-9600 fAX(925)988-%73 <br /> 819 Strlker Averxie,Suite 8 Sacramento CA 95834 (916)921-9600 PAS((916)921-0100 <br /> 1ii,� Analytical <br /> 1455 McDowell Blvd.North.Ste.D Petaluma.CA 94954 (707)792-1$65 FAX{707)792-0342 <br /> is i*ee 'de—r—' <br /> ,n.+' o vv a <br /> Gettler Ryari/Geostrategtes Y Cilent Project ID Former Unocal SS#2859 <br /> 6747 Sierra Court, Ste J Matra Liquid <br /> ADubiin, CA 94568 :x <br /> ,Attention Deanna Harding Work Order# 9812431 03-10 w Reported Dec 22, 1998 <br /> v r, k A � .,w r ry <br /> wxrr nv.ve v,Sw.4.r.u rrv.4e x v v f v{av. ..x n al.v >r+!ryn r r vxnv ivWrvr Vti r N+�++rn mnvx vmwvf!ti rrr mmrn�vxrrnvxn ..... rn ti f. f. r vn 4 vex� uu r r xa rrnfv rw r <br /> OUALM CONTROL DATA REPORT <br /> Analyte: MTBE <br /> QC Batch#: MS120998MTBEF2A <br /> Analy. Method: EPAa26o <br /> Prep. Method- <br /> Analyst: L Duong <br /> MS/MSD #• 981218604 <br /> Sample Cone.: N 0 <br /> Prepared Date: 12/9/98 <br /> Analyzed Date: 12/9/98 <br /> Instrument 1.13 #: F2 <br /> Cone. Spiked: 50yg/L <br /> Result 39 <br /> S % Recovery: 78 <br /> Dup. Result. 41 <br /> MSD % Recov.: 82 <br /> RPD- 50 <br /> RPD Llmrt: 0.25 <br /> a f`fa , n vfvv v vhf yr hrrr V+� ++ a r f! a s r r rm• +++ + + � r f V nr• r V V r Vvrr r <br /> vtv wMa '.xvr} flet t n n as Vf f v4 nr nvv KV x a v v nalvv v r rrn v x+- 1w V v.fr aux ♦ rf v w <br /> LCS#: LCS120998 <br /> Prepared Date: 12/9/98 <br /> Analyzed Date: 12/9/98 <br /> Instrument I.D.#. F2 <br /> Cone. Spiked: 50ug/L <br /> LCS Result: 43 <br /> LCS%Recov.: 86 <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,Interferent-free matrix that Is analysed using the same reagents, <br /> IA 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 /> Tod nicher <br /> TO Manager ""MS-Matrix Spike,MSD-MS Duplicate,RPD-Relative%Difference 9812431 GET c2> <br />