B--The purpose of this Solicitation is to award a New 68HERH25Q0116

Amendment 0003 extend the deadline for quotes from June 9 to June 18 at 12:00 (noon) EDT. See FedConnect linked for the extension. Amendment 0002 provides a list of contract line items. See FedConnect linked below for the attachment. Amendment 0001 posted the attached Q & A on May 22,2025. See FedCOnnect linked below for the attachment. EPA Research Triangle Park, North Carolina is responsible for procuring, testing, and distributing filters of high purity to the State/local air pollution control agencies. The quartz filters are used with a size selective sampler (SSI) to collect PM-10 (particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers) samples. The glass fiber filters are used with a Total Suspended Particulate (TSP) sampler. The Teflon filters are used with a sampler to collect PM2.5 (particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers) samples. This process assures filters with uniform characteristics and known quality assurance testing for the national particulate networks.