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680 Ch*eake Drive Redwood City CA 94063 0650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> i 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> aE , 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Analytical <br /> Blaine Tech Services Client Project ID Shell 341 E Main St i <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9810730-01 Reported Oct 21 1998 <br /> QUALITY CONTROL DATA REPORT - <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst NC/GR <br /> ANALYTE Gasoline <br /> QC Batch# GC101498BTEX17A <br /> Sample No GW9809186-1 <br /> Date Prepared 10/14/98 <br /> Date Analyzed 10/14/98 <br /> Instrument I D# GCHP17 <br /> Sample Conc,ug/L N D <br /> Conc Spiked, ug/L 250 <br /> Matrix Spike,ug/L 230 <br /> % Recovery 93 <br /> Matrix <br /> pike Duplicate, ug/L 240 <br /> % Recovery 98 <br /> elative % Difference 52 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GWLCS101498A <br /> Date Prepared 10/14/98 <br /> Date Analyzed 10/14/98 <br /> Instrument I D# GCHP17 <br /> Conc Spiked,ug/L 250 <br /> LCS Recovery, ug/L 250 <br /> LCS%Recovery 101 <br /> Percent Recovery Control Limits <br /> MS/MSD 60-140 <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 /> S7gyPenner <br /> AN LYTICAL eparation 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 recoveryis to be used to validate the batch <br /> Pe <br /> ro�ect Manager <br />