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680 Chesapeake Drive Redwood City CA 94063 (650) 3b4-9600 FAX(550)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical Big Striker Avenue Suite$ Sacramento CA 95834 (916)921-9600 FAX(916)92f-OIOQ <br /> 1455 AAr-Dowell.Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ' ATC Associates, Inc Client Project ID Diesel Performance <br /> 1260 Graphics Drive Matrix Solid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 9809H49 -01-05 Reported Oct 9, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> ' QC Batch# MS092998MTBEEYA <br /> Analy Method EPA 8260 <br /> ' Prep Method NA <br /> Analyst L Duong <br /> MS/MSD # 9809136407 <br /> ' Sample Conc N D <br /> Prepared Date 9/29/98 <br /> Analyzed Date 9/30/98 <br /> Instrument l D # H6 <br /> Conc Spiked 2500 mg/Kg <br /> Result 2000 <br /> MMS °•6 Recovery 80 <br /> Dup Result 2100 <br /> MSD % Recov 84 <br /> ' RPD 49 <br /> RPD Limit 0-25 <br /> 1 <br /> LCS# LCS100298 <br /> Prepared Date 10/2/98 <br /> Analyzed Date 10/2/98 <br /> Instrument I D# F2 <br /> ' Conc Spiked 2500ug/Kg <br /> LCS Result 2500 <br /> ' LCS% Recov 100 <br /> x0-140 <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 /> SQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matnx 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 /> Ka yv imyal <br /> ' Project Mana er **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 98091-149 AAA 41> <br />