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• Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364.9600 FAX(650)364.9233 <br /> G) 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 9889600 FAX (510) 988.9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921.9600 FAX (916)921.0100 <br /> ... ... <br /> Blaine Tech Services, Inc. Client Project 1D: Chevron 9-0557 / 971124-S2 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> San Jose, CA 95112 <br /> Attention: Fran Thie Work Order#: 9711 G09-06, 08-09 Reported: Dec 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Methanol Ethanol lso-Propanol <br /> OC Balch#: GC1205971SHSHSA GC1205971SHSHSA GC1205971SHSHSA <br /> Analy. Method: ISHS ISHS ISHS <br /> Prep. Method: HS HS HS <br /> Analyst: T.Tran T.Tran T.Tran <br /> MS/MSD #: 9711 E9401 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.#: GCvl GCv1 GCv1 <br /> Cone. Spiked: 8.0 mg/L 8.0 mg/L 8.0 mg/L <br /> Result: 7.5 7.7 7.3 <br /> MS % Recovery: 94 96 91 <br /> Dup. Result: 7.8 8.4 8.2 <br /> MSD % Recov.: 98 105 103 <br /> RPD: 3.9 8.7 12 <br /> RPD Limit: 0-50 0-50 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 12/6/97 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: 8.0 8.1 7.9 <br /> LCS %Recov.: 100 101 99 <br /> LCS <br /> Control Limits 50-150 50-150 50-150 <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 7PectA NALYTICAL 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 /> nnerManager w�MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9711G09.BLA <9> <br />