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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(6501 364-9233' <br /> 4D 404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> I&V Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /980129-51 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9801 H79-07, 9801 H84-03-06 Reported Feb 13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Battu# GCO204981SHSHSA GCO204981SHSHSA 00O204981SHSHSA <br /> Analy Method ISHS EPA 8020 EPA 8020 <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 9801 FO904 9801 FO904 9801 FO904 <br /> Sample Cone N D N D N D <br /> Prepared Date 2/4/98 2/4/98 2/4/98 <br /> Analyzed Date 2/4/98 2/4/98 2/4/98 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Cane Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 53 58 55 <br /> MS % Recovery 66 73 69 <br /> Dup Result 54 59 57 <br /> MSD % Recov - 68 74 71 <br /> RPD 19 17 36 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK020498 BLK020498 BLK020498 <br /> Prepared Date 2/4/98 2/4/98 2/4/98 <br /> Analyzed Date 2/4/98 2/4/98 2/4/98 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 73 79 80 <br /> LCS % Recov 91 99 100 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> 7aaThe LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> fNLY:TICAL 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 LGS recovery is to be used to validate the batch <br /> nager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9801H79 BLA <6> <br />