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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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92t-0100 <br /> �lll� Analytical 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 3725 S Tracy Blvd <br /> 1688 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9811 H56-01-03 Reported Dec 14, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol <br /> QC Batch# GC1201981SHSHSB <br /> Anally Method ISHS <br /> Prep Method HS <br /> Analyst T Sorokin <br /> MS/MSD # 9811D5901 <br /> Sample Conc 48 <br /> Prepared Date 12/1/98 <br /> Analyzed Date 12/1/98 <br /> Instrument I D # GCv1 <br /> Conc Spiked 8 0 mg/L <br /> Result 13 <br /> �MS % Recovery 103 <br /> Dup Result 12 <br /> MSD % Recov 90 <br /> RPD 80 <br /> RPD Limit 0-50 <br /> LCS # LC8120198 <br /> Prepared Date 12/1/98 <br /> Analyzed Date 12/1/98 <br /> Instrument I ❑ # GCv1 <br /> Conc Spiked 8 0 mg/L <br /> LCS Result 81 <br /> LCS % Recov 101 <br /> 50-150 <br /> LCS 70-130 <br /> Control Limit <br /> Please Nate <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> ,E I AN 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 H <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> l interference,the LCS recovery is to be used to validate the batch <br /> Pe gy enner <br /> Pr a Manager *�MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9811H56 BLA <2> <br />