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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415) 364.9233 <br /> 404 N.Wiget Lane Walnut Creek, CA 94598 (510) 988-9600 FAX(510)968-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Blaine Tech Services, Inc. Client Project 1D: Chevron 9-0557/950863-S1 <br /> 7985 Timothy Drive Matrix: Liquid <br /> San Jose, CA 95133 <br /> "Attention: Jim Keller Work Order#: 9508383-07 Re ort <br /> PAug ' <br /> 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GCD80795STEX21A GCoSO795BTEX21A GCO80795BTEX21A GCO80795BTEX21A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J.Minkel J. Minkel J. Minkel J.Minkel <br /> MS/MSD#: 95071-14311 9507H4311 9507H4311 9507H4311 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 8/7/95 8/7/95 8/7/95 8/7/95 <br /> Analyzed Date: 8/7/95 8/7/95 8/7/95 8/7/95 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10pg/L ttlug/L 10pg/L 30pg/L <br /> Result: 12 12 12 36 <br /> MS% Recovery: 120 120 120 120 <br /> Dup. Result: 11 11 11 33 <br /> MSD % Recov.: 110 110 110 110 <br /> RPD: 8.7 8.7 8.7 8.7 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> �n <br /> LCS#: <br /> Prepared Date: - - <br /> Analyzed Date: - - - <br /> Instrument I.D.#: - - <br /> Conc. Spiked: - - - <br /> LCS Result: - - - <br /> LCS%Recov.: - - - <br /> LCS 71-133 72-128 72-130 71-120 <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 /> rrojectManagger <br /> 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 /> *'MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9508383-BLA <3> <br />