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680 Chesapeake Drive Redwecd Cary CA 94063 (650)364-9600 FAX(650)364-9233 <br /> a Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (025)983-9600 FA;.(9Z5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 1071 N Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98071-185-05 Reported Aug 19, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> OC Batch# GCO81498802002A GC0814988moo2A GC081498802002A GCO81498802002A GCO81498802002A <br /> Anally Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A. Kemp A. Kemp A.Kemp A Kemp A Kemp <br /> MS/MSD # 8080209 8080209 8080209 8080209 8080209 <br /> Sample Cone N D 0 87 N D 088 N D <br /> Prepared Date 8/14/98 8/14/98 8/14/98 8/14/98 8/14/98 <br /> Analyzed Date 8/14/98 8/14/98 8/14/98 8/14/98 8/14/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Cone Spiked 20ug/L 20ug/L 20pg/L 60ug/L 350,ug/L <br /> Result 20 20 20 60 320 <br /> MS% Recovery 100 96 100 99 91 <br /> Dup Result 17 17 17 50 300 <br /> MSD % Recov ' 85 81 85 83 86 <br /> RPD: 162 162 162 182 65 <br /> RPD Limit: o-20 0-20 0-20 0-20 0-50 <br /> LCS# LCS081498 LCS081498 LCS081498 LCS081498 LCS081498 <br /> Prepared Date 8/14/98 8/14/98 8/14/98 8/14/98 8/14/98 <br /> Analyzed Date 8/14/98 8/14/98 8/14/98 8/14/98 8/14/98 <br /> Instrument LD # HP2 HP2 HP2 HP2 HP2 <br /> Cone. Spiked- 20ug/L 20 ug/L 20 ug/L 60 ug/L 350 ug/L <br /> LCS Result 19 19 19 57 330 <br /> LCS % Recon 95 95 95 95 94 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <br /> Control Limits <br /> / ; Please Note <br /> SEQUOIA ANALYTICAL The LCS Is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap*1271 preparation,and analytical methods employed for the samples The matrix spike Is an aliquot of sample <br /> l fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> 11i 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 /> P ggy Penner <br /> Preject Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 98071-185 BLA ¢5> <br />