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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364 9233 <br /> Sequoia (9Z5)988-9600 <br /> 404 N Wiget Lane Walnut Creels CA 94598 (925)988-9600 FAX(925)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 0 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707) 792-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-1848/ 980810-T3 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9808758-02 Reported Aug 25, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> OC Batch# MS081698MTBEH6A <br /> Analy Method EPA 8260 <br /> Prep Method NA <br /> Analyst E Manuel <br /> MS/MSD# 980875203 <br /> Sample Conc N D <br /> Prepared Date 8/16/98 <br /> Analyzed Date 8/16/98 <br /> Instrument I ❑ # H6 <br /> Conc Spiked 50 fug/L <br /> Result 52 <br /> MS % Recovery 104 <br /> Dup Result 50 <br /> MSD% Recov 100 <br /> RPD 39 <br /> RPD Limit 0-25 <br /> LCS # LCS081698 <br /> Prepared Date 8/16/98 <br /> Analyzed Date 8/16/98 <br /> Instrument I.D # H6 <br /> Conc Spiked 50 ug/L <br /> LCS Result 52 <br /> LCS %Recav 104 <br /> 617-140 <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 /> SEQUOIA A YTICAL 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 fail within specified control limits due to matrix <br /> �i interference the LCS recovery is to be used to validate the hatch <br /> gory <br /> P t Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9808758 SLA <2> <br />