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Sequoia 610 Owupcike Drive Redwood City,CA 94063 (415) 364.9600 FAX(415)364-"13 <br /> 404 N.WitliN line Walnut Creek,CA 94598 (510) 988-9600 FAX(5 10)9/3.9173 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921.0100 <br /> Afton Geosclence Client project ID: Mobil #04-343, Tracy <br /> 30-A Lindbergh Ave. Matrix: Liquid <br /> Livermore, CA 94550 <br /> Attention: A. LeMay QC Sample Group: 5102080-090 Reported: Nov 3, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Diesel <br /> QC Batch#: SP103195 <br /> 8015EXA <br /> Analy. Method: EPA 8015 <br /> Prep. Method: EPA 3510 <br /> Analyst: J.Dinsay <br /> MS/MSD #: BLK103195 <br /> Sample Cone.: N.D. <br /> Prepared Date: 10/31/95 <br /> Analyzed Date: 10/31/95 <br /> Instrument I.D.#: GCHP-3B <br /> Cone. Spiked; 300 lig/L <br /> Result: 250 <br /> MS % Recovery: 83 <br /> Dup. Result: 230 <br /> MSD%Recov.: 77 <br /> RPD: 8.3 <br /> RPD Limit: 0-20 <br /> LCS#: LCS1031195 <br /> Prepared Date: 10/31/95 <br /> Analyzed Date: 10/31/95 <br /> Instrument f.D.#: GCHP-3B <br /> Cone. Spiked: 3Wpg/L <br /> LCS Result: 240 <br /> LCS% Recov.: so <br /> LCS 38-122 <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 ANALYTICAL,#1271 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. 8 <br /> C 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 /> Kevin Van Slambrook **MS=Matrix Upike,M80 MS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 5102080.ALT <8> <br />