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Sequoia <br /> 680%peakk Drive Redwood City CA W4 (650)364-9600 FAX(650)364-9233 <br /> LAI— <br /> 404 get Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> t3 t1�C' � 819 Striker Avenue Suite g Sacramento 95834 (916) 707 <br /> 921-9600 FAX( )921-0100 <br /> ,der' 1455 McDowell Blvd North Ste D Petaluma 9 CA 94954 707 792-1865 FAX 707 792-p342 <br /> Blaine Tech Services, Inc Client Project ID Shell 341 East Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9812G11 01 Reported Jan 14, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# Mso10799826os2A <br /> Analy Method EPA 8260 <br /> Prep Method EPA 5030 <br /> Analyst N Nelson <br /> LCS/LCSD#. LCS010799 <br /> Sample Conc.. NO <br /> Prepared Date 1/7/99 <br /> Analyzed Date: 1/7/99 <br /> Instrument I D #- GCMS2 <br /> Conc Spiked 50yg/L <br /> Result 43 <br /> LCS %Recov.. 86 <br /> Dup Result. 41 <br />• LCSD %Recov- 82 <br /> RPD: 48 <br /> RPD Limit: 0-25 <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> jJEEALYTICAL 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 anaiyhcal 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 /> nner <br /> �ct Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9812G11 BLA <2> <br />