The Environmental Protection Agency (EPA) Office of Research and Development awarded a firm-fixed price purchase order to Oxford Instruments America, Inc., doing business as Oxford Instruments, for an AZtecLive Automated Microanalysis System with UltimMax 100 Large Area Analytical Silicon Drift Detector. The $111,900.00 contract was awarded on a sole source basis under FAR 13.106-1(b)(1)(i) as Oxford Instruments was identified as the only vendor able to meet the EPA's requirements. The system will be used in support of EPA research programs to identify engineered nanoparticles and other contaminants in environmental samples by providing live electron imaging and X-ray microanalysis capabilities compatible with the agency's existing scanning electron microscope. There was no set-aside designation for this award.