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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> i 404 N Wiget 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 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9810737-06, 9810741-12 Reported Nov 3, 1998 <br /> 0UALITY-CONTR0L==DATA=REPORT. <br /> Analyte MTBE <br /> OC Batch# MS101198MTBEHSA <br /> Analy Method EPA 8260 <br /> Prep Method NA <br /> Analyst L Zhu <br /> MS/MSD # 981073703 <br /> Sample Cone 260 <br /> Prepared Date 10/11/98 <br /> Analyzed Date 10/11/98 <br /> Instrument I D # H6 <br /> Cone Spiked 50 jug IL <br /> Result 320 <br /> MS % Recovery 120 <br /> Dup Result 310 <br /> MSD % Recov 100 <br /> RPO 32 <br /> RPD Limit 0-25 <br /> LCS # LC8101198 <br /> Prepared Date 10/11/98 <br /> Analyzed Date 10/11/98 <br /> Instrument I D # H6 <br /> Cone Spiked 50 jug/L <br /> LCS Result 47 <br /> LCS. % Recov 94 <br /> s0-140 <br /> LCS 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 /> SE IA AN LYTICAL 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 recoverynalytes from the matrix spike does not fall within specified control limits due to matrix <br /> P gg Penner <br /> interference,the LCS recovery is to be used to validate the batch <br /> Pr t Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9810737 BLA <3> <br />