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(D- AvSequo' 680 Chesapeake Drive Redwood City,CA 94063 (650 364-960D <br /> ia ) FAX(650)364-9633 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510)988-9600 � FAX(510)988-9673 <br /> �ill>I� Analytical SE9 Striker <br /> enue.Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921.010() <br /> 1455 M[Dowel1 Blvd.North,Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ....: ................ <br /> ............ <br /> ;;::::� <br /> :: aine Tech Services, Inc. Client Project!D: Shell 1267 Country Club <br /> 1680 Rogers Ave. Matrix: Liquid i yG <br /> ".,".,;San Jose, CA 95112 <br /> ,,."'Attention: <br /> Fran hie <br /> Work Order#: 9805662 -02 Reported: May 28 199 <br /> Y <br /> QUALITY CONTROL DATA REPORT c <br /> Analyte: MTBE E <br /> QC Batch#: MS051598MTSEF2A <br /> Analy. Method: EPA 8260 <br /> Prep. Method: N.A. <br /> F. yi <br /> f <br /> Analyst: E.Manuel <br /> MS/MSD#: 980,971603 <br /> Sample Conc.: 2.1 <br /> Prepared Date: N/A <br /> Analyzed Date: 5/15/98 <br /> Instrument I.D.#: F2 <br /> ,Cont. Spiked: 50ug/L <br /> Result: ' 54 .I <br /> MS % Recovery: 104 <br /> DLI]?. Result: 53 <br /> MSD % Recov.: 102 <br /> RPD: 1.9 <br /> RPD Limit: 4-25 <br /> . ................'LCS #: .........Lcso51598.................... ......... ........................................ ............................................................... .. .... ... . <br /> Prepared Date: N/A <br />! Analyzed Date: 5/15/98 <br /> Instrument I.D.#: F2 ;! <br /> Conc. Spiked: 50ug/L <br /> LCS Result: 54 <br /> LCS %Recov.: 108 l <br /> a l <br /> yl <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Ij <br /> Please Note: <br /> leaThe LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> IA NALYTICAL preparation,and analytical methods employed for the samples. The matrix spike isan 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 /> enner Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9805662.BL.A <1> <br />