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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 woo <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632 /961105-C2 <br /> 985 Timothy Dnve Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller ,Work Order# 9611260-03 Reported Nov 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC110896BTEX20A GC110896BTEX20A GC110896BTEX20A GC110896BTEX20A <br /> Anally 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 Fsh G Fish <br /> MS/MSD# 961118408 961118408 961118408 961118408 <br /> Sample Conc N D 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 # GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked 10 ug/L 10 Ng/L 10 Ng/L 30 ug/L <br /> Result 11 93 87 26 <br /> MS %Recovery 110 93 87 87 <br /> Dup Result* 11 94 90 27 <br /> MSD % Recov- 110 94 90 90 <br /> RPD 00 11 34 38 <br /> RPD Limit 0-25 0-25 0-25 025 <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 # GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked 10}rg/L 10pg/L 10ug/L 30pg/L <br /> LCS Result 11 90 87 25 <br /> LCS %Recov 110 90 87 83 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 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 /> SEQUOIA AN AL 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 /> Peggy Penner <br /> Project Mana er **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9611260 BLA <2> <br />