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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 /> %(D— Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> 0 <br /> Blaine Tech Services, Inc Client Project ID Shell, Stockton, 960730-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San.lose, CA 95133 <br /> Attention Jim Keller Work Order# 9608098 -04 Reported Aug 22, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#' GCO81396BTEX02A GCO81396BTEX02A GC081396BTEX02A GC081396BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: R Vincent R Vincent R Vincent R Vincent <br /> MS/MSD# G9608167-14 G9608167-14 G9608167-14 G9608167-14 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 8/13/96 8/13/96 8/13/96 8/13/96 <br /> Analyzed Date 8/13/96 8/13/96 8/13/96 8/13/96 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 10 10 98 29 <br /> MS % Recovery 100 100 98 97 <br /> Dup Result 11 10 10 30 <br /> is MSD % Recov .. 110 100 100 100 <br /> RPD 95 00 20 34 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # GBLK081396 GBLK081396 GBLK081396 GBLK081396 <br /> Prepared Date 8/13/96 8/13/96 8/13/96 8/13/96 <br /> Analyzed Date 8/13/96 8/13/96 8/13/96 8/13/96 <br /> Instrument l D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result 11 12 11 34 <br /> LCS % Recov 110 120 110 113 <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 /> S U I 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 fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> P gy enner <br /> Pro t Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9608098 SLA 43> <br />