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r <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 4D 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> VQWF Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)931 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632 /961105-C2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9611260-01 Reported Nov 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME111196601OMDA ME1111966010MDA ME1111966010MDA ME111196601OMDA <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 # 96110502 95110502 96110502 96110502 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 11/11/96 11/11/96 11/11/96 11/11/96 <br /> Analyzed Date 11/11/96 11/11/96 11/11/96 11/11/96 <br /> Instrument I D # MTJA2 MTJA2 MTJA2 MTJA2 <br /> Cone Spiked 10 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 1 1 098 10 098 <br />. MS%Recovery 110 98 100 98 <br /> Dup Result 10 096 098 096 <br /> MSD% Recov 100 96 98 96 <br /> RPD 95 21 20 21 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS# BLK111196 BLK111196 BLK111196 BLK111196 <br /> Prepared Date 11/11/96 11/11/96 11/11/96 11/11/96 <br /> Analyzed Date 11/11/96 11/11/96 11/11/96 11/11/96 <br /> Instrument I D # MTJA2 MTJA2 MTJA2 MTJA2 <br /> Cone. Spiked 10 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> LCS Result 1 1 10 10 1 1 <br /> LCS% Recov 110 100 100 110 <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 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 /> Peggy Penner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9611260 BLA <7> <br />