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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> May 22, 1998 Submission #: 9805267 <br /> ERM-WEST WALNUT CREEK <br /> Atten - James Ackerman. <br />' Project: UP-STOCKTON Project#: 8187 25 <br /> Received. May 18 , 1998 <br />' re Blank spike and duplicate report for Fuel Oxygenates by GC/MS analysis . <br /> Method: EPA SW846 Method 8260 Modified <br />' Matrix: SOIL <br /> Lab Run# 12856 Analyzed: May 20, 1998 <br /> Spike <br /> Spike Amount Amount Found Spike Recov $ <br /> BSP Dup BSP Dup BSP Dup Control % RPD <br /> Anal to u K u K $ $ Limits RPD Lim <br /> METHYL TERTIARY BUTYL ETRE 100 100 109 105 10-9 105 80-120 3 . 74 20 <br /> BS Smpt # 186928 <br /> BSD Smpt # 186929 1220 Quarry Lane - Pleasanton, California 94566-4756 aND„H Y1111523 <br /> (925) 484-1919 - Facsimile (925) 484-1096 <br /> Federal ID #68-0140157 <br />