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Sequoia 680 Chesapeake DrRve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 41� 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 /> xor <br /> r Blaine Tech Services,Inc Client Project ID' Chevron 9-8632/960507 W5 <br /> 985 Timothy Drive Matrix Liquid <br /> ,'San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9605581-05 Reported May 20, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC051396BTE)(17A GCO51396BTEX17A GC051396BTE)(17A G0051396BTEX17A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method, EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: R vincent R Vincent R Vincent R Vincent <br /> MS/MSD#: 960517907 960517907 960517907 960517907 <br /> Sample Cone : N D N D N D 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 LD#: GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked: 10 pg/L 10 pg/L 10 pg/L 30 pg/L <br /> Result: 70 71 69 21 <br /> MS%Recovery: 70 71 69 70 <br /> Dup Result: 79 79 78 23 <br /> MSD %Recov.: 79 79 78 77 <br /> RPD: 12 11 12 91 <br /> RPD Limit* 0-25 0-25 0-25 0-25 <br /> LCS#: BLK051396 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 1.1)#: GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked: 10pg/L 10pg/L 10pg/L 30pg/L <br /> LCS Result 71 74 7 0 21 <br /> LCS%Recov.. 71 74 70 70 <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-tree matrix that is analyzed using the same reagents, <br />. %ectManager <br /> 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 /> **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9605581 BLA <4> <br />