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a i <br /> t 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia <br /> 404 N Wigs bane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-%73 <br /> 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9t6)921-0100 <br /> 'Wr Analytical 1455 McDoweq Blvd.North.Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> J ` N}x ,i •vua Nyn ,x+r,,vnr {` cal f n v r x` v 4Yvh,.f..r rx r vvffr rs x{.r+•Mvf v. <br /> 'lGettler Rya n/Geostrategies- Client Project ID Former UnoSS#2859 h <br /> 6747 Sierra Court, Ste J Matrix Llguld <br /> :Dublin,CA 94568 <br /> �Attentlon. Deanna Harding Work Order# 9812431 02 Reported Dec 22, 1998 <br /> iii, ,. .v w„ v v } r , ,, s} w r mrx ry r r yr v r xry ,1rx+.♦ tG1f v,, v x, ur r t r_r- r n v <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: MTBE <br /> OC Batch#: MS120898MTE3EF2A <br /> Analy. Method: EPA 8260 <br /> Prep. Method: <br /> Analyst: L Duong <br /> MS/MSD #: 981243102 <br /> Sample Conc : N D <br /> Prepared Date: 12/8/98 <br /> Analyzed Date: 12/8/98 <br /> Instrument I D #: F2 <br /> Conc. Spiked. 50ug/L <br /> Result: 43 <br /> �S %Recovery 86 <br /> Dup. Result: 42 <br /> MSD % Recov: 84 <br /> RPD: 2.4 <br /> RPD Limrt: 0-25 <br /> LCS #- LCS120898 <br /> Prepared Date: 12/8/98 <br /> Analyzed Date. 12/8/98 <br /> Instrument I.D.#- F2 <br /> Conc. Spiked: 50Ng/L <br /> LCS Result: 42 <br /> LCS% Recov: 84 <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 analyzed using the same reagents, <br /> QU IA A preparailon,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of spectic compounds and subjected to the entire analytical procedure K <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 /> od ranicher <br /> VO <br /> ct Manager ""MS-Matrix Spike,MSO=MS Duplicate,RPD-Relative%Difference 9812431 GST <1> <br />