The National Park Service is conducting a market survey for a potential project in Yellowstone National Park in Mammoth, Wyoming. The work involves supplying and installing twelve LPG boiler units, four below-grade propane tanks, and removing one below-grade fuel oil tank, with the Park handling excavation. Performance is estimated to begin within 60-120 days from the notice date. The project is under NAICS code 238220 with a $19.0 million small business size standard, and interested contractors must be registered as a small business under that code in SAM. This is a sources sought notice to gauge interest and capability, not a formal solicitation.