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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 Striker 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-H1 <br /> 985 Timothy Drive MatriX Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 961 OH36-06 Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#. GC103096BTEX21A GC103096BTEX21A GC103096BTEX21A GC103096BTEX21A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst G Fish G Fish G Fish G Fish <br /> MS/MSD# 961OD1407 961001407 961OD1407 961OD1407 <br /> Sample Conc No N D N D N D <br /> Prepared Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Analyzed Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiced 10 pg/L 10 fig/L 10 yg/L 30 pg/L <br /> Result 99 93 94 28 <br /> . MS% Recovery 99 93 94 93 <br /> Dup Result 10 97 97 29 <br /> MSD % Recov 100 97 97 97 <br /> RPD 10 42 31 35 <br /> RPD Limit 0-25 0.25 0-25 025 <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# GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10 fig/L 10 fug/L 10 ug/L 30 frg/L <br /> LCS Result 99 91 91 28 <br /> LCS % Recov 99 91 91 93 <br /> 60-140 60140 60140 60140 <br /> LCS 70-130 70130 70130 70130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent4ree matrix that is analyzed using the same reagents, <br /> IA 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 fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> e P nner <br /> r ect Manager "*MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 961OH36 BLA <3> <br />