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I <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creel. CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �rlll� Analytical 819 Striker Avenue Swte 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Pacific Environmental Group Client Project ID 311-1741A/BP #5447, Stockton <br /> I 2025 Gateway Place, Suite 440 Matrix Solid <br /> San Jose, CA 95110 <br /> Attention Joe Muzzio Work Order# 9802686 01-12 Reported Feb 27, 1998 <br /> „ <br />' QUALITY CONTROL DATA REPORT <br />' Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME022098601OMDF ME022098601OMDF ME022098601OMDF ME022098601OMDF <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br />' Prep Method EPA 3010 EPA 3010 EPA 3010 EPA 3010 <br /> Analyst S Le Barron S LeBarron S Le Barron S Le Barron <br />' MS/MSD # 9802A3501 9802A3501 9802A3501 9802A3501 <br /> Sample Conc N D N D 30 32 <br /> Prepared Date 2/20/98 2/20/98 2/20/98 2/20/98 <br /> Analyzed Date 2/20/98 2/20/98 2/20/98 2/20/98 <br />' Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 47 45 75 71 <br /> 10 MS % Recovery 94 92 90 78 <br /> Dug Result 50 50 85 84 <br />' MSD % Recov 100 100 110 104 <br /> RPD 62 83 13 17 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> 1 <br />' LCS # BLK022098 BLK022098 BLK022098 BLK022098 <br /> Prepared Date 2/20/98 2/20/98 2/20/98 2/20/98 <br /> Analyzed Date 2/20/98 2/20/98 2/20/9a 2/20/98 <br />' Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br />' LCS Result 49 46 48 48 <br /> LCS % Recov 98 92 96 96 <br />' 80-120 80-120 80-120 80-120 <br /> LCS 80-120 80-120 80-120 80-120 <br /> Control Limits <br />' Please Note <br /> The LCS is a control sample of known,interferent-free matrix that 1s analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 /> t �'A„' <br /> Tod Granicher interference,the LCS recovery is to be used to validate the batch <br /> Project Manager **MS=Matrix Spike MSD=MS Duplicate, RPD=Relative%Difference 9802886 PPP <2> <br /> r� <br />