The National Park Service at Mount Rainier National Park is seeking a supplier to provide an estimated 62,000 gallons of liquid propane gas annually, along with tank rental and delivery, under a base plus up to four option year firm-fixed-price contract. The contractor must offer remote monitoring for automatic notifications when tanks fall below 20% capacity, eliminating the need for park staff to place orders. This is a sources sought notice, not a request for competitive proposals, and responses will be considered for future requirements. Performance of services will be at Mount Rainier National Park. No budget amount is specified.