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ii Sequoia 680 Chesapeake Drive 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)988-9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-1918 /961024-1-11 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 961 OH36 -01-03 Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC1029966TEX17A GC10M6BTEX17A GC102996BTEX17A GC1029963TEX17A <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# 961OC3307 961003307 961OC3307 961003307 <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 I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10 pg/L 10 pg/L 10 pg/L 30 pg/L <br /> Result 10 10 99 32 <br /> MS % 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 Limit 025 0-25 0-25 0-25 <br /> LCS # BLK102996 BLK102996 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 10pg/L 10pg/L long/L 30 jig/L <br /> LCS Result 11 10 10 30 <br /> LCS %Recov 110 100 100 100 <br /> M 60.140 60-140 60-140 60-140 <br /> LCS 70.130 70-130 70-130 70-130 <br /> Control Limas <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> ,SJQIA NALYTICAL 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 /> PnnePManager **MS=Matrix Spike MSD=MS Duplicate,RPD=Relative%Difference 961OH36 BLA <1> <br />