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41) Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wcget 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 /> Gettler Ryan/Geostrategies Client Project ID Chevron 9-6171, Stockton <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94668 <br /> Attention Deanna Harding Work Order# 9611619 -02-07 Reported Nov 22, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Beryllium Cadmium Chromium Nickel <br /> QC Batch#- ME111996W10M2A ME1119%WIOM2A ME1119966010M2A ME1119966010M2A <br /> Analy Method: EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3010 EPA 3010 EPA 3010 EPA 3010 <br /> Analyst: R Butler R Butler R Butler R Butler <br /> MS/MSD# 961186501 961186501 961186501 961186501 <br /> Sample Conc - ND N D N D N D <br /> Prepared Date: 11/19/96 11/19/96 11/19/96 11/19/96 <br /> Analyzed Date 11/19/96 11/19/96 11/19/96 11/19/96 <br /> Instrument I D #: MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc Spiked. 10 mg/L 1 0 m9/L 1 0 m9/L 1 0 mg/L <br /> Result- 11 11 11 11 <br /> MS % Recovery 110 110 110 110 <br /> Dup Result: 1 1 11 11 1 1 <br /> MSD % Recov 110 110 110 110 <br /> RPD. 00 00 00 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS #: CCV111596 CCV111596 CCV111596 CCV111596 <br /> Prepared Date' 11/15/96 11/15/96 11/15/96 11/15/96 <br /> Analyzed Date. 11/19/96 11/19/96 11/19/96 11/19/96 <br /> Instrument LD # MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc. Spiked 5 0 mg/L 5 0 m9/L 5 0 m9/L 5 0 mg/L <br /> LCS Result. 50 48 49 49 <br /> LCS % Recov - 100 96 98 98 <br /> M <br /> LCS 75-125 75-125 75-125 75-125 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,Interferent-free matrix that is anafyzed using the same reagents, <br /> �2regory7 <br /> TICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compoundq 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 valtdate the batch <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relptive% Difference <br /> 9611619 GET <4> <br />