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r Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> r <br /> • <br /> rPacific Environmental Group Client Project 1D 311-174 1A/BP 5447, Stockton <br /> 2025 Gateway Place, Suite 440 Matrix Solid <br /> r San Jose, CA 95110 <br /> Attention Jessica Nellligan Work Order# 9802211 01-09 Reported Feb 13, 1998 <br /> rQUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> rQC Batch# ME0205986010MDE ME020598601OMDE ME020598601OMDE ME020598601OMDE <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> rAnalyst T Sears T Sears T Sears T Sears <br /> MS/MSD # 980221101 980221101 980221101 980221101 <br /> r Sample Conc N D N D 34 29 <br /> Prepared Date 2/5/98 2/5/98 2/5/98 2/5/98 <br /> Analyzed Date 2/6/98 2/6/98 2/6/98 2/6/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> rConc Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 44 45 99 90 <br /> MS % Recovery 88 90 130 122 <br /> rDup Result 50 51 120 100 <br /> MSD % Recov 100 102 172 142 <br />' RPD 13 13 19 11 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> r <br /> LCS # BLK020598 BLK020598 BLK020598 BLK020598 <br /> rPrepared Date 2/5/98 2/5/98 2/5/98 2/5/98 <br /> Analyzed Date 2/6/98 2/6/98 2/6/98 2/6/98 <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 54 53 54 54 <br />' LCS % Recov 108 106 108 108 <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 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 !t <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Tod Granicher interference,the LCS recovery is to be used to validate the batch <br /> IProject Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9802211 PPP <1> <br />