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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 8 t9 Striker Avcnue Suite 9 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Iwo <br /> Blaine Tech Services Inc Client Project ID V Shell, Stockton /960820-K2 <br /> 985 Timothy Drive Matrix Liquid <br /> San.lose, CA 95133 <br /> Attention Jim Keller Work Order# 9608E67 -01-05 Reported Sep 11, 1996 <br /> / ( r <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GG090396STEX22A GCO903968TEX22A GC09W968TEX22A GC090396BTEX22A <br /> Analy Method EPA 6020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5= EPA 5030 EPA 5030 EPA 5030 <br /> Analyst H Potter H Porter H Porter H Porter <br /> MS/MSD # 9608E3102 9608E3102 9608E3102 9608E3102 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 9/3/96 9/3/96 9/3/96 9/3/96 <br /> Analyzed Date 9/3/96 9/3/96 9/3/96 9/3/96 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked long/L 10Y9/L 10ug/L 30ug/L <br /> Result 10 10 99 29 <br /> MS % Recovery 100 100 99 97 <br /> Dup Result 10 97 97 28 <br /> MSD % Recov 100 97 97 93 <br /> RPD 00 30 20 35 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# BLK090396 BLK090396 ELK090396 BLK090396 <br /> Prepared Date 9/3/96 9/3/96 9/3/96 9/3/96 <br /> Analyzed Date 9/3/96 9/3/96 9/3/96 9/3/96 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked 10ug/L 10yg/L 10ug/L 30pg/L <br /> LCS Result 10 10 98 30 <br /> LCS %Recov 100 100 98 100 <br /> M M D 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 /> CIA NALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 /> Pieyenninterference,the LCS recovery is to be used to validate the batch <br /> Pe y enn <br /> Project Manager MS=Matrix Spike, MSD=MS Duplicate RPD=Relative%Difference 9608E67 SLA <1> <br />