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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget 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)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell, Stockton /960823-K1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order # 960BF60-07 Reported Sep 25, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch#• MS0916968260F2A <br /> Analy Method EPA 8260 <br /> Prep Method. N/A <br /> Analyst M Williams <br /> MS/MSD # <br /> Sample Conc <br /> Prepared Date. - <br /> Analyzed Date - <br /> Instrument I D # - <br /> Conc Spiked - <br /> Result <br /> MS % Recovery <br /> Dup Result <br /> MSD %Recov . <br /> RPD <br /> RPD Limit - <br /> LCS# VR6091696 <br /> Prepared Date 9/16/96 <br /> Analyzed Date 9/16/96 <br /> Instrument I D # F2 <br /> Conc Spiked 101ug/L <br /> LCS Result- 94 <br /> LCS % Recov 94 <br /> M M D 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 /> QU 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 /> Pib- ect Manager **MS=Matrix Spike, MSD=MS Duplicate,RPO=Relative% Difference 9608F60 BLA <3> <br />