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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> 1455 McDowell Blvd.North,Ste. D Petaluma,CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> 7 <br /> », <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#: 9901 F86-01-06 Reported: Feb 19, 1999::.': <br /> 4 .: ........ .......:. :.; ...... .. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Methanol Ethanol Iso-Propanol <br /> QC Batch#: GCO20299iSHSHSB GCO202991SHSHSB GCO202991SHSHSB <br /> Analy. Method: ISHS ISHS ISHS <br /> Prep. Method: HS HS HS <br /> } Analyst: M.M. M.M. M.M. <br /> t MS/MSD #: 990iE8601 9901E8601 9901E8601 <br /> Sample Conc.: N.D. N.D. N.D. <br /> f Prepared Date: 2/2/99 2/2/99 2/2/99 <br /> Analyzed Date: 2/2/99 2/2/99 2/2/99 <br /> Instrument I-D.#: GCV1 GCV1 GCV1 <br /> Conc. Spiked: 8.0 mg/L 8.0 mg/L 8.0 mg/L <br /> Result: 6.6 6.6 6.4 <br /> MS % Recovery: 83 83 80 <br /> Dup. Result: 6.6 7.0 7.0 <br /> MSD % Recov.: 83 88 88 <br /> RPD: 0.0 5.9 9.0 <br /> RPD Limit: 0-50 0-50 0-50 <br /> LCS #: LC5020299 LCS020299 LCS020299 <br /> Prepared Date: 2/2/99 2/2/99 2/2/99 <br /> Analyzed Date: 2/2/99 2/2/99 2/2/99 <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: 6.4 6.2 6.3 <br /> LCS % Recov.: 80 78 79 <br /> i <br /> 50-150 50-150 50-150 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> f <br /> 1. Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA 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 /> Kar imy <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9901E86.i3LA <6> <br />