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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(510) 988 9673 <br /> Analytical 819 Striker Avenue, Suite 8 Sacramento CA 95834 (916) 921 9600 FAX{916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-4275 /971125-Sl <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 G19-01, 03-04, 06-09 Reported Dec 15, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso Propanol <br /> QC Batch# GC1205971SHSHS13 GC1205971SHSHSB GC1205971SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 9711E9401 9711E9401 9711E9401 <br /> Sample COnc N D N D N D <br /> Prepared Date 12/5/97 12/5/97 12/5/97 <br /> Analyzed Date 12/5/97 12/5/97 12/5/97 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 75 77 73 <br /> MS % Recovery 94 96 91 <br /> Dup Result 78 84 82 <br /> MSD % Recov 98 105 103 <br /> RPD 39 87 12 <br /> RPD Limit 050 050 0-50 <br /> LCS # BLK120697 BLK120697 BLK120697 <br /> Prepared Date 12/6/97 12/6/97 12/6/97 <br /> Analyzed Date 12/6/97 12/8/97 12/6/97 <br /> Instrument I D # GCV1 GGv1 GCV1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 80 81 79 <br /> LCS %Recov 100 101 99 <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 /> 0 SEQUOKAPIALYTI AL 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 entre analytical procedure ff <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> dL� interference,the LCS recovery is to be used to validate the batch <br /> Peggy Penner **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manage 9711G19 BLA 48> <br />