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.� <br /> �+ v, �+ Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue,Sulte 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettlel'Ryar/Geostrategies Client Project 1D Unocal 0123/1034 Central Ave <br /> -6747 Sierra Court, Ste J Matrix Liquid <br /> :Dublin, CA 94568 <br /> Attention Deanna Harding Work Order# 9803H06-02-05 Reported Apr 13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch## ME033198601OMDA ME033198601OMDA ME033198601OMDA ME033198601OMDA <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 LaBarron S LaBarron S LaBarron S LaBarron <br /> MS/MSD # 9803J2001 9803,12001 9803J2001 9803J2001 <br /> Sample Conc. N D N D N D 016 <br /> Prepared Date 3/31/98 3/31/98 3/31/98 3/31/98 <br /> Analyzed Date 4/3/98 4/3/98 4/3/98 4/3/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 10 10 10 12 <br /> MS % Recovery 100 100 100 100 <br /> Dup Result 11 11 11 13 <br /> MSD % Recov 110 110 110 110 <br /> RPD 95 95 95 80 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # BLK033198 BLK033198 BLK033198 BLK033198 <br /> Prepared Date 3/31/98 3/31/98 3/31/98 3/31/98 <br /> Analyzed Date 4/3/98 4/3/98 4/3/98 4/3/98 <br /> Instrument 1.13 # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> LCS Result 10 10 10 10 <br /> LCS % Recov 100 100 100 100 <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-tree matrix that is analyzed using the same reagents, <br /> SEQUOI ALYTICAL 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 /> Interference,the LCS recovery is to be used to validate the batch <br /> regory <br /> oject Manager "'MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 98031-106 GET <2> <br /> r� <br />