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- S <br /> 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)-364 9133. <br /> Sequoia <br /> 4D_ <br /> Analytical 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988-%73 <br /> 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Blaine'Tech Services, Inc Client Project ID -Shell Stockton /971121-G2~ <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 E94-01-03, 06 Reported Dec 12, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch#' MS120397MTBEF3A <br /> Analy Method EPA 8260 <br /> Prep. Method N A <br /> Analyst R Yee <br /> MS/MSD #- 971194204 <br /> Sample Conc 220 <br /> Prepared Date 12/3/97 <br /> Analyzed Date 12/3/97 <br /> Instrument LD # f=3 <br /> Conc. Spiked 500 ug/L <br /> Result 720 <br /> MS % Recovery 100 . <br /> Dup Result 730 <br /> MSD % Recov. 102 <br /> RPD 14 <br /> RPD Limit 0-25 <br /> LCS #. VMB120497 <br /> Prepared Date 12/4/97 <br /> Analyzed Date 12/4/97 <br /> Instrument I.D.# F3 <br /> Conc. Spiked 50 ug/ <br /> LCS Result 51 <br /> LCS % Recov 102 <br /> fi0-140 <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 /> VectNALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sam <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure <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 /> e <br /> ager "*MS=Matrix Spike, MSD=MS Duplicate, RPO=Relative%Difference 9711E94 BLA <3> <br />