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' Sequoia 680 Chesapcake Drive Redwood City,C4 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct Lane Walnut Creek CA 94596 (510) 988 9600 FAX(510) 988 9673 <br /> 4llW Analytical 819 Straker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Blaine Tech Services, Inc ry Client Project ID Chevron 9-2033 /960822-G1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9608E47-04 Reported N Sep 11, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GC: Batch# GC082896BTEX20A GCO82896BTDMA GC082896BTEX20A GCO82896BTEX20A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Pree Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst- D Jirsa D Jirsa D Jirsa D Jirsa <br /> MS/MSD # 9608A7202 9608A7202 9608A7202 9608A7202 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 8/28/96 8/28/96 8/28/96 8/28/96 <br /> Analyzed Date 8/28/96 6/28/96 8/28/96 8/28/96 <br /> Instrument I D # GCHP20 GCHP20 GCHP20 GCHP20 <br /> Cone Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> Result 10 96 95 29 <br />• MS %Recovery 100 96 95 97 <br /> Dup Result 98 90 92 27 <br /> MSD%Recov 98 90 92 90 <br /> RPD: 20 65 32 71 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK082896 BLK062896 BLK082M BLK082896 <br /> Prepared Date 8/28/96 8/28/96 8/28/96 8/28/96 <br /> Analyzed Date 8/28/96 8/26/96 8/28/96 8/28/96 <br /> Instrument I D #. GCHP20 GCHP20 GCHP20 GCHP20 <br /> Cone Spiked. 10pg/L 10pg/L 10pg/L 30pg/L <br /> LCS Result 75 76 79 23 <br /> LCS%Recov 75 76 79 77 <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 /> S IA NALYTICAL 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 /> Pr 9 <br /> ect Manager **M$=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 96ME47 BLA 45> <br />