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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget 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 /> Blame Tech Services,Inc talent Project ID Chevron 948632/960507-W5 <br /> 985 Timothy Drive Matra( Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9605581-01 Reported Ma}r 20, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# MEo513966010MDA MEo51396601oMDA ME0513966010MDA ME0513966010MDA <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 O'Donnell S O'Donnell S O'Donnell S ODonnell <br /> MS/MSD#: 960546311 960546311 960545311 960546311 <br /> Sample Cone : N D ND ND N D <br /> Prepared Date: 5/13/96 5/13/96 5/13/96 5/13/96 <br /> Analyzed Date: 5/13/96 5/13/96 5/13/96 5/13/96 <br /> Instrument I D#: MTJA2 MTJA2 MTJA2 MTJA2 <br /> Cone Spiked: 10 mg/L 10 mg/L 1 0 mg/L 1 0 mg/L <br /> Result: 094 091 091 092 <br />. MS%Recovery- 94 91 91 92 <br /> Dup. Result: 097 095 094 095 <br /> MSD% Recov 97 95 94 95 <br /> RPD 31 43 32 32 <br /> RPD Limit 0-20 0-20 0.20 0-20 <br /> LCS# BLKD51396 BLK051396 BLK051396 BLK051396 <br /> Prepared Date: 5/13/96 5/13/96 5/13/96 5/13/96 <br /> Analyzed Date: 5/13/96 5/13/96 5/13/96 5/13/96 <br /> Instrument LD#-. MTJA2 MTJA2 MTJA2 MTJA2 <br /> Cone. Spiked: 10 mg/L 10 mg/L 1 0 mg/L 10 mg/L <br /> LCS Result: 10 10 099 10 <br /> LCS%Recov.: 100 100 99 100 <br /> LCS 80-120 80-120 80-120 80120 <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 /> tUO 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 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 /> y <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9605581 BLA ¢2> <br />