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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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1-9600 FAX(916)921-0100 <br /> a— )wr Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX(707)79Z 0342 <br /> Blaine Tech Services Client Project ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 <br /> Attention Fran Thle OC Sample Group 9810741-07-11 Reported Oct 27 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst NC/GR <br /> ANALYTE Gasoline <br /> QC Batch# GC1014989TEX21A <br /> Sample No GW9809186A <br /> Date Prepared 10/14/98 <br /> Date Analyzed 10/14/98 <br /> Instrument I D# GCHP21 <br /> Sample Conc ,ug/L ND <br /> Conc Spiked,ug/L 250 <br /> Matrix Spike,ug/L 250 <br /> % Recovery 99 <br /> Matrix <br />. pike Duplicate,ug/L 250 <br /> %Recovery 99 <br /> elative% Difference 00 <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# GCHP21 <br /> Conc Spiked,ug/L 250 <br /> LCS Recovery, ug/L 230 <br /> LCS% Recovery 93 <br /> Percent Recovery Control Limits <br /> MSIMS0 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 /> S U 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 /> Pe Penner <br /> Project Manager <br />