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. - \ Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 %73 <br /> 0 Iwo Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 96W FAX(916)921 0100 <br /> -Blaine Tech Services, Inc Client Project ID Chevron 9-1918 /961024-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 961 OH36-04 Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC103196BTEX02A GC103196BTEX02A GC103196BTEX02A GC1031968TEX02A <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# 961OD1407 961OD1407 961OD1407 961OD1407 <br /> Sample Conic N D N D N D N D <br /> Prepared Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> j Analyzed Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10pg/L 10pg/L 10p9/L 30p9/L <br /> Result 96 81 78 22 <br /> �S % Recovery 96 81 78 73 <br /> Dup Result 11 91 87 24 <br /> MSD %Recov 110 91 87 80 <br /> RPD 14 12 11 87 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# BLK103196 BLK103196 BLK103196 BLK103196 <br /> Prepared Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> Analyzed Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10pg/L 10 jug/L 10pg/L 30pg/L <br /> LCS Result 11 94 91 25 <br /> LCS %Recov 110 94 91 83 <br /> i <br /> I <br /> MS7MSD 60-140 60-140 60-140 6G-140 <br /> LCS 70-130 70-130 70-130 70130 <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 /> S U AN LYTICAL 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 fall within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> P�eggy ner <br /> o�et Manager MS=Matrix Spike MSD=MS Duplicate, RPD=Relative% Difference 961OH36 BLA <25 <br />