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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 /> 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 -01-02 Reported Nov 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC110896BTEX21A GC110896BTEX21A GC110896BTEX21A GC110896BTEX21A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst G Fish G Fish G Fish G Fish <br /> M S/MSD # 961118408 961118408 961118408 961118408 <br /> Sample Conc ND ND N D N D <br /> Prepared Date 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Analyzed Date 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Instrument I D.# GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10119/1- 1011g/L 1011g/L 30pg/L <br /> Result 11 96 97 29 <br /> MS % Recovery 110 96 97 97 <br /> Dup Result. 11 10 10 31 <br /> MSD%Recov 110 100 100 103 <br /> RPD 00 41 30 67 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK110896 BLK110896 BLK110896 BLK110896 <br /> Prepared Date 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Analyzed Date 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 1011g/L 10 pg/L 10 p9/L 30 Y9/L <br /> LCS Result 11 10 10 31 <br /> LCS% Recov.. 110 100 100 103 <br /> MS/M 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70130 70-130 <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 /> 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 compound$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 /> eggy Penne <br /> roject Man ger **MS=Matrix Spike, MSD=MS Duplicate, RPD w Relative%Difference 9611260 BLA <1> <br />