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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (495) 364 9233 <br /> 404 N Wiget Lane Walnut Creek, CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> fr�l1>7 Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> :Blaine Tech Services,Inc Client Frolect ID' Shell, Stockton/960516-Al + j <br /> `985 Timothy Drive Matrix Liquid <br /> ,San Jose, CA 95133 s <br /> } Reported May 29, 1996, <br /> ,Attention Jim Keller Work Order# 9605C69-03-04 v+ NA++ A+ nw A <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#' GCO52296BTEX21A GCO52296BTEX21A GC052296BTEX2IA GCO52296BTEX21A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J Woo J Woo J Woo J Woo <br /> MS/MSD #: s605Afioo4 9605A6004 9605A6004 9605A6004 <br /> Sample Conc : N D N D N D N D <br /> Prepared Date: 5/22/96 5/22/96 5/22/96 5/22/96 <br /> Analyzed Date: 5/22/96 5/22/96 5/22/96 5/22/96 <br /> Instrument I.D.# GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc.Spiked 1opg/L 10ltg/L 10Ng/L 30yg/L <br /> Result: 11 11 98 30 <br /> MS %Recovery: 110 110 98 100 <br /> Dup Result: 11 11 10 31 <br /> MSD %Recov: 110 110 100 103 <br /> RPD: 00 00 20 33 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> LCS#' BLK052296 BLK052296 BLK052296 BLK0522% <br /> Prepared Date: 5/22/96 5/22/96 5/22/96 5/22/96 <br /> Analyzed Date: 5/22/96 5/22/96 5/22/96 - 5/22/96 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc.Spiked: 1011g/L 10 pg/L i0 pg/L 30 pg/L <br /> LCS Result: 12 11 11 33 <br /> LCS %Recov.: 120 110 110 110 <br /> 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 /> E O 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 /> e 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 /> eg <br /> ct Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9605C69 BLA <3> <br /> g� <br />