Memorandum to File Summary

This is a Memorandum to File justifying the use of other than full and open competition for a simplified acquisition under FAR 13.106-1(b)(1)(i). The procurement involves a TSI Incorporated Aerodynamic Particle Sizer, Part Number 3321, in factory new condition (Quantity: 1) from TSI Incorporated and authorized distributors located in Shoreview, Minnesota (CAGE: 24575). The required delivery date is August 31, 2026, with funding expiring September 30, 2026. The equipment is needed to facilitate repairs for an Army project, and delivery must be completed prior to the end of the Period of Performance on September 30, 2026. The acquisition is not expected to exceed the simplified acquisition threshold.

The justification for single-source procurement is based on Brand Name, as selected in Section III. The Aerodynamic Particle Sizer was tested and certified using specific protocols with the U.S. Army Combat Capabilities Development Command Chemical Biological Center (DEVCOM Chemical Biological Center) and validated with custom software interfaces. Switching to an alternative particle sizer would require retesting, recertification, and software revalidation, which would not meet customer requirements for cost, schedule, and performance within the repair project timeline. The retesting and re-certification process could take an extended period and incur substantial costs, ultimately delaying repairs and deliverables to the Army customer. The Contracting Officer approved this single-source solicitation based on the documented justification.