The Bureau of Reclamation, Mid-Pacific Region intends to award a firm fixed-price contract for a base year and four (4) option years on a sole source basis with the County of Siskiyou, California for pesticide monitoring service under the authority of FAR 13.106-1(b)(1), Soliciting from a single source. A sole source justification has been prepared in support of this acquisition. Location of services: Tule Lake National Wildlife Refuge and Lower Klamath National Wildlife Refuge. The applicable Northern American Industry Classification System (NAICS) code is 921190, there is no corresponding size standard. Firms believing they can provide these services above must provide written notification to the Contract Specialist with supporting evidence to that effect insufficient detail to demonstrate the respondent's ability to meet the stated requirements. This notice is not a request for competitive proposals. All responses received by the due dates will be considered by the Government. A determination by the Government not to compete this proposed action based on responses to this notice is solely within the discretion of the Government. Information received will be considered solely for the purpose of determining whether to conduct a competitive procurement. Responses should be emailed to the Government point of contact for this acquisition. Responses shall include: 1) Company name, address, SAM Unique Entity ID, and Point of Contact. 2) Information that would demonstrate that your business has the capability to provide the services mentioned above. Point of Contact: RaShayla Brown, rashayla_brown@ios.doi.gov Responses Due: April 9, 2026, by 10:00AM (PST)