Tuba city OU2 & 3 - excavation & BIO-remediation

The Department of the Interior Bureau of Indian Affairs Navajo Region is soliciting environmental remediation services for the Tuba City Operational Units 2 and 3 excavation and bio-remediation project in Arizona. The contract requires comprehensive environmental cleanup services including sampling, excavation of contaminated waste, bioremediation application, and reporting for three operational units contaminated with petroleum hydrocarbons, diesel, gasoline, motor oil, and asbestos from past operational activities at the former Tuba City Agency Heating Plant and BIA Roads Maintenance Yard. Contractors must demonstrate technical approach capabilities, key project management and technical support expertise, and past performance experience, with specific emphasis on demonstrated project experience on Tribal trust lands, as the evaluation will prioritize these technical factors over price considerations. The solicitation has been amended twice, with the final proposal submission deadline extended to August 29, 2025, at 3:00 p.m. MDT, and no further questions are being accepted following the government's response to previously submitted inquiries.

This procurement is designated as a 100% set-aside for Indian Small Business Economic Enterprise (ISBEE) firms under the Buy Indian Act, 25 U.S.C. 47, and operates under NAICS code 562910 with a $25 million small business size standard. The scope of work includes excavating approximately 1,800 cubic yards of petroleum-contaminated soil at OU-2, conducting direct push chemical injections at multiple groundwater monitoring wells, removing non-aqueous phase liquid layers from monitoring wells, and plugging and abandoning approximately 40 groundwater monitoring wells. The contract performance period runs from the award date through August 2026, with all work to be performed at the Tuba City sites located on Navajo Nation land in Arizona. Previous remediation efforts have been conducted by companies including Rock Gap Engineering, Emergency Environmental Services, and Animas Environmental Services, with Eastern Shawnee Professional Services currently providing semi-annual groundwater monitoring services under ongoing environmental assessment activities.