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- ' 680 Chesapeake Drive Redwood City CA 94063 (650) $64 9600 FAX (650)364 9233 <br /> Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> i <br /> Blaine Tech Services, Inc Client Project I D Chevron 9-4275 /971125-S1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711G19-02, 05 Reported Dec 15, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GC1208971SHSHSB GC1208971SHSHSB GC1208971SHSHSB <br /> Analy Method 1SHS 1SHS 1SHS <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 9711E9402 9711E9402 9711E9402 <br /> Sample Conc ND No ND <br /> Prepared Date 12/8/97 12/8/97 12/8/97 <br /> Analyzed Date 12/8/97 12/8/97 12/8/97 <br /> Instrument I D # GCv1 GCv1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 80 84 82 <br /> . MS % Recovery 100 105 103 <br /> Dup Result 84 86 83 <br /> MSD % Recov 105 108 104 <br /> RPD 49 24 12 <br /> RPD Limit 0-50 050 0-50 <br /> LCS.# BLK120897 BLK120897 BLK120897 <br /> Prepared Date 12/8/97 12/8/97 12/8/97 <br /> Analyzed Date 12/8/97 12/8/97 12/8/97 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Conc Spiked a 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 79 82 81 <br /> LCS % Recov 99 103 101 <br /> 50-150 50-150 50-150 <br /> LCS 70-130 70-130 70-330 <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 ALYTICAL 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 LCS recovery is to be used to validate the batch <br /> Peggy enner <br /> Project Manager *'MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9711G19 BLA <7> <br />