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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wtget Lane Walnut Creels,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, Inca Client Protect ID Shell, Stockton /960905-L1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 Re orted Sep 26, 1996 <br /> Attention Jim Keller Work Order,# 9609357-02 P <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. MTBE <br /> QC Batch#: MS0919968260F3A <br /> Analy Method EPA 8260 <br /> Prep Method: N/A <br /> Analyst* L Zhu <br /> MS/MSD#. 960935702 <br /> Sample Conc. 410 <br /> Prepared Date - <br /> Analyzed Date 9/19/96 <br /> Instrument LD #. F3 <br /> Conc Spiked Sops/L <br /> Result 57 <br /> MS % Recovery 106 <br /> Dup Result. 56 <br /> MSD % Recov 104 <br /> RPD 18 <br /> RPD Limit- 0-25 <br /> LCS # VDI3091996 <br /> Prepared Date - <br /> Analyzed Date: 9/19/96 <br /> Instrument I D # F3 <br /> Conc Spiked 50pg/L <br /> LCS Result- 52 <br /> LCS % Recov 104 <br /> M&/MSD 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 UO LALYTICAL 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 procedurehe recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> eg aPros ct M '*MS Matrix Spike MSD MS Duplicate, RPD Relative%Difference 9609357 SLA <3> <br />