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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N VViiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)931-0100 <br /> Blaine Tech Services, Inc N Client Project ID Shell Stockton/971009-G1 <br /> y'1680 Rogers Ave Matrix Liquid <br /> ;`San Jose, CA 95112 <br /> Attention FranThle Work Order# 9710591-07, 09, 9710593-10-11, 13 Reported Oct 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> OC Batch#: MS101997MTEEF2A <br /> Analy. Method- EPA 8260 <br /> Prep. Method N A <br /> Analyst: L Zhu <br /> MS/MSD #: 971059109 <br /> Sample Conc.- 16 <br /> Prepared Date 10/19/97 <br /> Analyzed Date. 10/19/97 <br /> Instrument 1.1) #• F2 <br /> Conc Spiked- 50pg/L <br /> Result 68 <br /> MS % Recovery- 104 <br /> 0 Dup Result- 71 <br /> ltfiSD % Recov.- 110 <br /> RPD: 56 <br /> RPD Limit: 0-25 <br /> LCS#: VMB101997 <br /> Prepared Date: 10/19/97 <br /> Analyzed Date 10/19/97 <br /> Instrument LD # F2 <br /> Conc Spiked 50 ug/L <br /> LCS Result, 59 <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 /> OI 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 /> !Oec <br /> Penner <br /> Pt Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9710591 BLA <6> <br />