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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 /> a- ) <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-4275/980326-G1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9803157-01-02, 05, 9803158-10 Reported Apr 21, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GCG330981SHSHSB GC0330981SHSHSB GC03309818HSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD# 9803F1809 9803F1809 9803F1809 <br /> Sample Conc N D N D N D <br /> Prepared Date 3/30/98 3/30/98 3/30/98 <br /> Analyzed Date 3/30/98 3/30/96 3/30/98 <br /> Instrument I.D #- GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 77 88 86 <br /> MS % Recovery 96 110 108 <br /> Dup. Result 79 88 88 <br /> MSD % Recov 99 110 110 <br /> RPD 26 00 23 <br /> RPO Limit 0-40 0-40 0-40 <br /> LCS # BLK033098 BLK033098 BLK033098 <br /> Prepared Date 3/30/98 3/30/98 3/30/98 <br /> Analyzed Date 3/30/98 3/30/98 3/30/98 <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 78 90 8 8 <br /> LCS % Recov. 98 113 110 <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,interferent4ree matrix that is analyzed using the same reagents, <br /> A LALYTICAL 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 /> Cthe 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 /> egg Penner <br /> of t Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9803157 BLA <4> <br />