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Sequoia 680 Chesapeake Dnve Redwood C" CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> rV� 1 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> kilo Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Pacific Environmental Group Client Project ID 311-174 1A/BP 5447, Stockton <br /> 2025 Gateway Place, Suite 440 Matrix Solid <br /> San Jose, CA 95110 <br /> Attention Jessica Nellligan Work Order# 9802211 01-09 Reported Feb 13, 1998 <br />' QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br />' QC Batch# GCO205980HBPEXB <br /> Analy Method EPA 8015M <br /> Prep Method EPA 3550 <br />' Analyst A Kaushanskaya <br /> BS/BSD # BLK020598 <br />' Sample Cone N D <br /> Prepared Date 2/5/98 <br /> Analyzed Date 2/5/98 <br /> Instrument I D # GCHP19B <br />' Cone Spiked 25 mg/Kg <br /> Result 1s <br /> BS %Recovery 72 <br /> Dup Result 20 <br /> BSD % Recov s0 <br />' RPD 11 <br /> RPD Limit 0-50 <br /> LCS # <br />' Prepared Date <br /> Analyzed Date <br /> Instrument I D # <br />' Cone Spiked <br /> LCS Result <br /> LCS % Recov <br /> 50-150 <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 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 /> Tod Grantcher interference,the LCS recovery is to be used to validate the batch <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative %Difference 9802211 PPP <3> <br />