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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 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Sinker Avenue,Suite 9 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /980210-A1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802737-06, 09-10 Reported Feb 27, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GCO21798ISHSHSA GCO217981SHSHSA GCO217981SHSHSA <br /> Analy Method- ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 980273702 980273702 980273702 <br /> Sample Conc . N D N D N D <br /> Prepared Date 2/17/98 2/17/98 2/17/98 <br /> Analyzed Date 2/17/98 2/17/98 2/17/98 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> i <br /> Result 57 61 59 <br /> MS % Recovery 71 76 74 <br /> 40 Dup Result 59 68 65 <br /> MSD %Recov. 74 85 81 <br /> RPD 34 11 97 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK021798 BLK021798 BLK021798 <br /> Prepared Date 2/17/98 2/17/98 2/17/98 <br /> Analyzed Date 2/17/98 2/17/98 2/17/98 <br /> Instrument I D.# GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L a 0 mg/L <br /> LCS Result 59 66 64 <br /> LCS % Recov 74 83 80 <br /> 50-150 50-150 50-150 <br /> LCS 70130 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 1s 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 /> te y Penner <br /> ct Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference 9802737 BLA <3> <br />