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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364AW) f• i <br /> Sequoia 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673' <br /> �,} 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical coal 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> J 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Blaine Tech Services, Inc Client Project ID Shell 107 North Main Street <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9901 E85-01-03 Reported Feb 22, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Tnchloro- Chloro- <br /> ethene ethene Benzene <br /> QC Batch# GCO20899801006A GCO20899801006A GCO20899801006A <br /> Analy. Method EPA 8010 EPA 8010 EPA 8010 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 <br /> Analyst P Kosovskaya P Kosovskaya P Kosovskaya <br /> MS/MSD # 9020287 9020287 9020287 <br /> Sample Conc N D N D N D <br /> Prepared Date 2/8/99 2/8/99 2/8/99 <br /> Analyzed Date 2/8/99 - 2/8/99 2/8/99 <br /> Instrument I.D.# HP6 HP6 HP6 <br /> Conc Spiked 20ug/L 20pg/L 20ug/L <br /> Result 23 26 25 <br /> MS % Recovery 115 130 125 <br /> Dup Result 24 28 27 <br /> MSD %Recov 120 140 135 <br /> RPD 43 74 77 <br /> RPD Limit 0-25 0-25 0-25 <br /> LCS # LCS020899 LCS020899 LC8020899 <br /> Prepared Date 2/8/99 2/8/99 2/8/99 <br /> Analyzed Date 2/8/99 2/8/99 2/8/99 <br /> Instrument I.D.# HP6 HP6 HP6 <br /> Conc Spiked 20,ug/L 20)tg/L 20ug/L <br /> LCS Result 17 - 20 21 - <br /> LCS % Recov 85 100 105 <br /> 60-140 60-140 60-140 <br /> LCS 65-135 70.130 70-130 <br /> Control Limits <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap #1271 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 /> Zan—Kirnyai **NIS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference <br /> Project Manager 9901E85SLA <3> <br />