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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 Shell Stockton/970131-Z1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9702115 02 Reported Feb 13, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO21097BTEX17A GCO21097BTEX17A GCO21097BTEX17A GCO21097STEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A Miraftab A.Miraftab A Miraftab A.Miraftab <br /> MS/MSD # 9701H4203 9701H4203 97011-14203 9701 H4203 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 2/10/97 2/10/97 2/10/97 2/10/97 <br /> Analyzed Date 2/10/97 2/10/97 2/10/97 2/10/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10ug/L 10ug/L 10ug/L 30ug/L <br /> Result. 11 11 11 33 <br /> MS % Recovery- 110 110 110 110 <br /> iDup Result 10 10 10 32 <br /> WJSD % Recov 100 100 100 107 <br /> RPD 95 95 95 31 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK021097A BLK021097A BLK021097A BLK021097A <br /> Prepared Date 2/10/97 2/10/97 2/10/97 2/10/97 <br /> Analyzed Date 2/10/97 2/10/97 2/10/97 2/10/97 <br /> Instrument l D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10ug/L ioug/L 10Ng/L 30ug/L <br /> LCS Result 11 11 11 34 <br /> LCS % Recov.. 110 110 110 119 <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 /> NPeag <br /> NALYTICAL 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 0 <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 /> nner <br /> Pro ct Manager "`" MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9702115 BLA <2> <br />