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Sequoia 690 Chcs-iOcake Drive Rcdwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wibct Lane Walnut Creck CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> 14W Analytical 819 Stnkcr A%enue,Suite 8 Sacramento CA 95934 (916) 921 9600 FAX (916) 921 0100 <br /> 40 <br /> Blaine Tech Services, Inc Client Project ID Shell Tracy/970605-K2 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9706470 -01-02, 04 Reported Jun 19, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch# GC061397BTEX07A GCO61397BTEX07A GCO61397BTEX07A GC061397BTEX07A GCO61397BTEX07A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A Porter A Porter A Porter A Porter A. Porter <br /> MS/MSD# 970645904 970646904 970645904 970646904 970646904 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date 6/13/97 6/13/97 6/13/97 6/13/97 6/13/97 <br /> Analyzed Date 6/13/97 6/13/97 6/13/97 6/13/97 6/13/97 <br /> Instrument I D# GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> Cone Spiked 10Ng/L long/L 10ug/L 30ug/L 60ug/L <br /> Result 10 10 11 33 69 <br /> % Recovery 100 100 110 110 115 <br /> pup Result 11 11 11 34 72 <br /> MSD % Recov 110 110 110 113 120 <br /> RPD 95 95 00 30 43 <br /> RPD limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK061397 BLK051397 BLK061397 BLK061397 BLK061397 <br /> Prepared Date 6/13/97 6/13/97 6/13/97 6/13/97 6/13/97 <br /> Analyzed Date 6/13/97 6/13/97 6/13/97 6/13/97 6/13/97 <br /> Instrument l D# GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> Cone Spiked 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> LCS Result 11 11 11 35 73 <br /> LCS % Recov 110 110 110 117 122 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> /�* I The LCS is a control sample of known,Interferent-free matrix that is analyzed using the same reagents, <br /> OIA NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortif 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 /> Peggy Penner <br /> `Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPA=Relative%Difference 9706470 BILA <1> <br />