This is a sources sought notice for market research, not a solicitation, regarding annual preventative maintenance and repair services for a Nu Instrument NP2 (with NP3 upgrade) multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) at the USGS Denver Federal Center in Lakewood, CO. The contract includes one annual preventative maintenance visit, unlimited emergency site visits within five business days, telephone support, software updates, and Nu Instruments-approved parts, with labor and travel covered. Responses must be submitted by July 28, 2026, at 2:30 p.m. Mountain Daylight Time. No budget amount is specified. The location for performance is the Denver Federal Center, Building 20, Lakewood, CO.