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1 <br /> Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (650) 364 9600 FAX(654)364 9233 <br />' 404 N Wiset Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> tiol� Analytical 819 Stnker 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 Nelligan Work Order # 9802209 01, 02 Reported Feb 11, 1998 <br /> r <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 />' MS/MSD# BLK020598 <br /> Sample Conc N D <br /> Prepared Date 2/5/98 <br /> Analyzed Date 2/5/98 <br />' Instrument I D # GCHP19B <br /> Conc Spiked 25 mg/kg <br /> Result 18 <br />'• MS % Recovery 72 <br /> Dup Result 20 <br />' MSD % Recov 8o <br /> RPD 11 <br /> RPD Limit 0-50 <br /> I <br />' LCS # <br /> Prepared Date <br /> Analyzed Date <br />' Instrument I D # <br /> Conc Spiked <br /> LCS Result <br /> LCS % Recov <br /> 50-150 <br /> LCS 66-140 <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 H <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 /> Tod Granlcher <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9802209 PPP <3> <br />