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1 <br /> Sequoia 680 Chesapeake Dave Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5i0)988 9673 <br /> 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0106` <br /> Analytical <br /> Blaine Tech Services, Inc Client Project ID Shell Tracy/980211-A3 <br /> 1680 Rogers Ave Matrix Liquid <br /> a <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802739-01-03, 05 Reported Mar 5, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GCO220981SHSHSA GCO220981SHSHSA GCO220981SHSHSA _ <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 980273701 980273701 980273701 <br /> Sample Cone N D N D N D <br /> Prepared Date 2/20/98 2/20/98 2/20/98 <br /> Analyzed Date 2/20/98 2/20/98 2/20/98 <br /> Instrument I D # GCV1 GCV1 GCV1 _ 4 <br /> Conc. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 69 68 66 F <br /> MS % Recovery 86 85 83 <br /> Dup Result 66 72 68 �} <br /> MSD % Recov 83 90 85 <br /> RPD 44 57 30 <br /> -RPD Limit -o-5o -----o-5a —o-so <br /> LCS # BLK022098 BLK022098 BLK022098 <br /> Prepared Date 2/20/98 2/20/98 2/20/98 <br /> Analyzed Date 2/20/98 2/20/98 2/20/98 <br /> Instrument LD # GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 68 62 60 <br /> t -LCS-% Recov 85 78 _ 75 <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 /> SEQUOIA A YTICAL 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 \1 <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 /> e Penner <br /> Project Manager **MS=Matnx Spike, MSD=MS Duplicate, RPD=Relative%Difference 9802739 BLA <2> <br />