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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> • �IAnalytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 92 1 9600 FAX (916) 921 0100 <br /> - <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton/970401-F2 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9704289 -01, -03 Reported Apr 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch# GC041197STEX21A GC041197BTEX21A GC041197ETEX21A GC041197BTEX21A GC041197BTEX21A <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 D Jirsa D Jirsa D Jirsa D Jlrsa D Jirsa <br /> MS/MSD # 970422501 970422501 970422501 970422501 970422501 <br /> Sample Conc. N D N D N D N D N D <br /> Prepared Date 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Analyzed Date 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conic Spiked 10Ng/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> Result 99 10 10 31 60 <br /> MS % Recovery 99 100 100 103 100 <br /> • Dup. Result 99 10 99 30 59 <br /> MSD % Recov 99 100 99 100 98 <br /> RPD 00 00 10 33 17 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS# BLK041197 BLK041197 BLK041197 BLK041197 BLK041197 <br /> Prepared Date 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Analyzed Date 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conic Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L 60 lig/L. <br /> LCS Result: 98 99 99 30 59 <br /> LCS % Recov ,, 98 99 99 100 98 <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 /> The LCS is a control sample of known,tnterferent4ree matrix that Is analyzed using the same reagents, <br /> E OI ANALYTICAL 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 /> Pe P <br /> Pr } ct Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9704289 BLA <1> <br />