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MAR , i i�Idy 0 )4AM 11V I /, u f LU/L4 <br /> Sequoia �0 a�"�p°"ke orlrr Rtdwuod a9,,a 94063 (650)-164-96W FAX(690)360-9209 <br /> 4"N W(gec Lane Wahwt Creek G 94598 (925)989-9600 FAX(925)968-9673 <br /> a <br /> Analytical SCD Avern�e, -I 8 S-II&oG to, 95834 (916)92i-96W FAX 1916)921-0loo <br /> Y 1455i9M'cDow�p Blvd North,Ste D Ptukwn,CA 94954 (707)792,-1865 FAX 1707)797-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232.9600 FAX (650)232-9612 <br /> Resoluholutis' Y�a"�3vi <br /> t Erntronrnenta� on5 tent Project ID ER1227903, <br /> X74 Digital Drr4e, Ste s Matrix Solld <br />' o Novato, CA 94949 <br /> Attention Mark Dotsckyum Work Order# 9901 E44 01-07 Reported Mar 29, <br /> 1999,' <br /> 1 QUALITY CONTROL DATA REPORT <br /> Analyte: MTBE <br /> QC Batah#. SP0204998MEXA <br /> Analy Method: EPA 9260 <br /> Prep. Method: EPA 6=0 <br /> Analyst- N Netson <br /> MS/MSD#: 9020454 <br /> Sample Conc.: 7400 <br /> Prepared Date 2/4/99 <br /> Analyzed Date- 2/4/99 <br /> Instrument I D,#: GCM82 <br /> Conc.Spiked: 25p0Ng/N <br /> Result: 0900 <br /> MS %Recovery: Be <br /> Dup. Result 9600 <br /> MSD % Recov- as <br /> RPD, 00 <br /> RPD Unit: 0-25 <br /> {,.ifs at•s ° �� Yr <br /> .Z.-"e��R 9�� I— WINSSe k NVASaS�h� '"h Wgo.PKn;, ',g P" r gf�,� t,{7,riE{33`o i <br /> LCS#: LCS020499 <br /> Prepared Date: 2/4/99 <br /> Analyzed Date: 2/5/99 <br /> Instrument I.D.#• GCMs2 <br /> Conc. Spiked- 2soo99/KD <br /> 1 ECS Result 2400 <br /> LCS % Recov,: 96 <br /> 60-140 <br /> LCS 7x130 <br /> Corrtrol Limits <br /> Please Note <br /> The L.CS is a control ample of known,Interfererlt4reo matrix that Is analyzed un.-no tho same reagents, <br /> SEQUOIA AN CAL preparation,and analyttcal methods ernployad tar the sampies The matrix spike is an aliquot at sample <br /> LAP#t2 1 fortified with known uantlfes of s <br /> q peCfic Compounds and subjected to the errtira an a" 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 /> avid A P c ett <br /> Project $nagef *"MS=Matrix Spike, MSD-MS Duplleatg,RPD■Rel&tive%Difference 9907E44 EEE Coy <br /> 10 L <br />