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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> ta) <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos, CA 940 70-4111 (650) 232-9600 FAX(650) 232-9612 <br /> I� <br /> Blaine Tech Services Client Project ID Shell 3725 S Tracy Blvd <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Fran Thle QC Sample Group 9903442-03 Reported Mar 22 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst BTF <br /> ANALYTE Gasoline <br /> QC Batch # GC031899STEX02A <br /> Sample No GW9903436-4MS <br /> Date Prepared 3118199 <br /> Date Analyzed 3118199 <br /> Instrument I D # GCHP02 <br /> Sample Cone , ug/L N D <br /> Cone Spiked, ug/L 250 <br /> Matrix Spike, ug/L 220 <br /> . % Recovery 87 <br /> Matrix <br /> Spike Duplicate, ug/L 210 <br /> % Recovery 85 <br /> Relative % Difference 23 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GWLCS031899A <br /> Date Prepared 3118199 <br /> Date Analyzed 3118199 <br /> Instrument I D # GCHP02 <br /> Cone Spiked ug/L 250 <br /> LCS Recovery, ug1L 210 <br /> LCS % Recovery 85 <br /> Percent Recovery Control Limits <br /> MSIMS0 60140 <br /> LCS 70130 <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 /> WUOIA 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 tall within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Ka a <br /> Project Ma ager <br />