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Sequoia 680 Chesapcakc Drive Redwood City Ca 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (Si0) 988 900 FAX(510) 988%73 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project 10 Chevron 9-1918/961824-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> F San Jose, CA 95133 <br /> -Attention Jim Keller Work Order# 961OH36 -01-03 Reported Nov 8, 19% <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC102996BTEX17A GC1029%BTEX17A GC102996BTEX17A GC1029966TEX17A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst Y Arteaga Y Arteaga Y Arteaga Y Arteaga <br /> MS/MSD # 9610133307 961OC3307 961003307 961OC3307 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Analyzed Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Instrument 1 D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10 yg/L 10 jig/L 10 jig/L 30 ug/L <br /> Result 10 10 99 32 <br /> % Recovery 100 100 99 107 <br /> Dup Result 11 11 11 32 <br /> MSD %Recov 110 110 110 107 <br /> RPD 95 95 11 00 <br /> RPD Lima 0-25 0-25 0-25 0-25 <br /> LCS # BLK102996 BLK1029% BLK102996 BLK102996 <br /> Prepared Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Analyzed Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked long/L 10frg/L 10119/L 30pg/L <br /> LCS Result 11 10 10 30 <br /> LCS %Recov 110 100 100 100 <br /> MS/MSD 60-140 60-140 60-140 60.140 <br /> LCS 70-130 70-130 70-130 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 /> Q IA NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> L <br /> with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> very of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> nce,the LCS recovery is to be used to validate the batch <br /> Peggy nner <br /> Proje t Manager **MS=Matnx Spike MSD=MS Duplicate, RPD=Relative% Difference 961OH36 BLA <1> <br />