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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (654)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- ) <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92f-9600 FAX(916)921-010 0 <br /> 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 # 9810737-01-03, 05-06 Reported Nov 3, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> OC Batch# GC1012981SHSHSB GC1012981SHSHSB GC1012981SHSHSB <br /> Anally Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD # 9809E5401 9809E5401 9809E5401 <br /> Sample Conc N D N D N D <br /> Prepared Date 10/5/98 10/5/98 10/5/98 <br /> Analyzed Date 10/5/98 10/5/98 10/5/98 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 68 75 81 <br /> MS % Recovery 85 94 101 <br /> Dup Result 6s 73 80 <br /> MSD % Recov 81 91 100 <br /> RPD 45 27 12 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS ,# LCS101298 LCS101298 LCS101298 <br /> Prepared Date 10/12/98 10/12/98 10/12/98 <br /> Analyzed Date 10/12/98 10/12/98 10/12/98 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 72 74 78 <br /> LCS % Recov 90 93 98 <br /> 50-150 50-150 50-150 <br /> LCS 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 /> IA A ALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> 4fortified with known quantities of specific compounds and subjected to the enure analytical procedure If <br /> the overy 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 /> Peg y nner <br /> Pro Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9810737 BILA <10> <br />