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l <br /> , Sequoia 680 Chesapeake Drive Redwood City C4 94463 (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 Stinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 WOO <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# 9610H36-10, 12-14 Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC1029%BTEX07A GC102996BTEX07A GC1029%BTEX07A GC102996BTEX07A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst H Porter H Porter H Porter H Porter <br /> MS/MSD# 961OB9104 961OB9104 961069104 961OB9104 <br /> Sample Conc. N D N D N D N 0 <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# GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc Spiked 10,ug/L 10Ng/L 10pg/L 30Ng/L <br /> Result 91 10 11 35 <br /> %Recovery 91 100 110 117 <br /> Dup Result 88 10 11 33 <br /> MSD %Recov 88 100 110 110 <br /> RPD 34 00 00 59 <br /> RPD Limit 0-25 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 # GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc Spiked 10ug/L 10{rg/L 10,ug/L 30Frg/L <br /> LCS Result 86 98 11 33 <br /> LCS %Recov 86 98 110 110 <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 /> U 1A A ALYTICAL 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Peggy .e ner <br /> Projl3et Manager "*MS=Matrix Spike,MSD=MS Duplicate RPD=Relative%Difference 961OH36 BLA -�6> <br />