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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 %00 FAX(510)988 9673 <br /> Iwo Analytical 819 Sinker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-1918 /961024-H1 v <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 961 OH36-07-08 Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC1029%BTEX02A GC1029%BTEX02A GC102996BTF_X02A GC102996BTEX02A <br /> Anally Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst Y Arteaga Y Arteaga Y Arteaga Y Arteaga <br /> MS/MSD # 961oC33o6 961OC3306 961OC3306 961OC3306 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Analyzed Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Instrument 1 D.# GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10Ng/L 10 frg/L long/L 30lrg/L <br /> Result 13 11 10 29 <br /> OS% Recovery 130 110 100 97 <br /> Dup Result 13 11 10 29 <br /> MSD%Recon 130 110 100 97 <br /> RPD 00 00 00 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK102996 BLK102996 BLK102996 BLK102996 <br /> Prepared Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Analyzed Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Instrument I D.# GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10pg/L 10Ng/L 10ug/L 30ug/L <br /> LCS Result 13 11 11 29 <br /> LCS % Recon 130 110 110 97 <br /> MS/MSD 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 /> OI 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 /> Zinterference,the LCS recovery is to be used to validate the batch <br /> Penner <br /> ect Manager **MS=Matrix Spike MSD=MS Duplicate RPD-Relative%Difference 961OH36 BLA <4> <br />