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i.l 41 f <br /> Sequoia 680 Chesapeake Drive Redwood Clty 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 /> Analytical <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> r e � 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> *Blaine Tech Services, Inc Client Project ID Shell 1071 North Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9810727-05 Reported Oct 30, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> CC Batch# MS101998MTBEF2A <br /> Analy Method EPA 8260 <br /> Prep Method N A <br /> Analyst M Williams <br /> MS/MSD# 981026704 <br /> Sample Conc 43 <br /> Prepared Date 10/19/98 <br /> Analyzed Date 10/19/98 <br /> Instrument I D # F2 <br /> Conc Spiked 50pg/L <br /> Result 93 <br /> MS % Recovery 100 <br /> Dup Result 93 <br /> MSD % Recov 100 <br /> RPD 00 <br /> RPD Limit 0-25 <br /> LCS# LCS101998 <br /> Prepared Date 10/19/98 <br /> Analyzed Date 10/19/98 <br /> Instrument I D # F2 <br /> Conc Spiked 50ug/L <br /> LCS Result 58 <br /> LCS % Recov 116 <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 /> S A 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 fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> eggy enner <br /> roje Manager "MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference 9810727 BLA <3> <br />