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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 /> Analytiea1 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 931 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell, Stockton, 960730-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9608098 -05, -06 Reported Aug 22, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC081395BTEX03A GC081396STD(03A GC081396BTEX03A GCO81396BTEX03A <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# G9608157-14 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 # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 83 82 82 24 <br /> MS % Recovery 83 82 82 81 <br /> Dup Result 11 11 10 31 <br /> [SSD % Recov 110 110 100 103 <br /> RPD 28 29 20 24 <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 # GGHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result 97 99 97 29 <br /> LCS % Recov 97 99 97 97 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Nate <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Vject <br /> AL YTICAL 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 /> Is the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> encs,the LCS recovery is to be used to validate the batch <br /> ager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9608098 BLA <4> <br />