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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ID 404 N Wiget Lane Walnut Creek CA 94598 (510) 988%00 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite a Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-1918 /961024-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 96101-136-09, 11, 15 Reported Nov S, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC103096BTEX06A GC103096BTEX06A GC103096BTEX06A GC103096BTEXDBA <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst H Porter H Porter H Porter H Porter <br /> MS/MSD# 961081606 961081606 961OB1606 961OB1606 <br /> Sample Conc N D ND N D N D <br /> Prepared Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Analyzed Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Instrument I D # GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc Spiked 10fig/L 10frg/L 10pg/L 30fig/L <br /> Result 10 10 10 31 <br /> MS%Recovery 100 100 100 103 <br /> Dup Result 11 11 10 32 <br /> MSD% Recov 110 110 100 107 <br /> RPD 95 95 00 32 <br /> RPD Limit 0.25 0-25 0-25 0-25 <br /> LCS# BLK103096 BLK103096 BLK103096 BLKi03096 <br /> Prepared Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Analyzed Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Instrument I D # GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc Spiked 10,ug/L 10 frg/L 10 fig/L 30 fig/L <br /> LCS Result 92 90 90 28 <br /> LCS% Recov 92 90 90 93 <br /> MS/MSD 60-140 60140 60-140 60-140 <br /> LCS 70-130 70130 70-130 70-130 <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 /> SB A A 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 /> gg enner <br /> P j t Manager **MS=Matrix Spike,MSO=MS Duplicate, RPD=Relative% Difference 961OH36 SLA <5> <br /> 9§ <br />