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i <br /> i <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364 9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Iwo- Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 940704111 (650)232 9600 FAX(650)232-9612 <br /> Blaine Tech Services Client Project ID Shell, 341 East Main St <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9904B91-01, -02 Reported May 17, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst JAB <br /> ANALYTE Gasoline <br /> QC Batch# GCO50499BTEX02A <br /> Sample No GW9904C04-1 <br /> Date Prepared 514/99 <br /> Date Analyzed 514/99 <br /> Instrument I D# GCHP02 <br /> Sample Cone , ug/L N D <br /> Cone Spiked, ug1L 250 <br /> Matrix Spike, ug/L 240 <br />. % Recovery 96 <br /> Matrix <br /> Spike Duplicate, ug/L 240 <br /> % Recovery 96 <br /> Relative% Dlfferenc, 00 <br /> I <br /> RPD Control Limits 0-25 <br /> LCS Batch# GC050499BTEX02A <br /> Date Prepared 514199 <br /> Date Analyzed 5/4/99 <br /> Instrument I D# GCHP02 <br /> Cone Spiked, ug/L 250 <br /> LCS Recovery, ug/L 250 <br /> LCS% Recovery 1000 - <br /> Percent Recovery Control Limits <br /> MS/MSD 60140 <br /> LCS 70-130 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br />*SEQUOIA 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 /> 5 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 /> Kayvan Kimyai <br /> Project Manager <br /> -OD, <br />