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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)911 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632 / 980212-C1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9802902-01-04 Reported Mar 5, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br /> QC Batch# GCO2113980HBPEXZ <br /> Analy Method EPA S015M <br /> Prep Method EPA 3520 <br /> Ana lyst D Lockhart <br /> MS/MSD # 980293201 <br /> Sample Cone 170 <br /> Prepared Date 2/18/98 <br /> Analyzed Date 2/20/98 <br /> Instrument I D # GCHP19 <br /> Cone Spiked 1000,ug/L <br /> Result 900 <br /> MS % Recovery 73 <br /> Dup Result 940 <br /> MSD % Recov 77 <br /> RPD 43 <br /> RPD Limit 0-50 <br /> LCS# BLK021898 <br /> Prepared Date 2/18/98 <br /> Analyzed Date 2/20/98 <br /> Instrument I D # GCHP19 <br /> Cone Spiked 1000 pg/L <br /> LCS Result 810 <br /> LCS % Recov 81 <br /> 50-150 <br /> LCS 60-140 <br /> Control Limits <br /> I <br /> Please Note <br /> i <br /> The LCS is a control sample of known, interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL 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 It <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> �vfa�f interference,the LCS recovery is to be used to validate the batch <br /> Peggy enner <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate RPD=Relative% Difference 9802902 BLA <3> <br />