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9=CHROMALAB, INC. <br /> Environmental Services(SDB) <br />' April 10 , 1998 Submission # - 9803455 <br />' HARDING LAWSON (SACRAMENTO) <br /> Atten: Gary Haeck <br />' Pro3ect - 38737 004 <br /> Received: March 30 , 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#: 12120 Analyzed April 9 , 1998 <br /> ' Spike <br /> Spike Amount Amount Found Spike Recov % <br /> BSP Dup BSP Dup BSP Dup Control % RPD <br /> Analyte (ucr/K4) ucr/Ka) M_ M Limits RPD Lim <br /> METHYL TERTIARY BUTYL ETHE 100 100 98 2 101 98 . 2 101 80-120 2 81 20 <br /> 1 <br /> 1 <br /> 1 <br /> 1 + <br /> Bs smpt # 180024 1220 Quarry Lane - Pleasanton, California 94566-4756 <br /> ' BSD smpt # 180025 (510) 484-1919- Facsimile (510) 484-1096 a 85 1226 11EWEI 125111 <br /> Federal ID #68-0140157 <br />