Description
This solicitation seeks a qualified contractor to design, permit, and install residential onsite wastewater treatment systems (OWTS) for homes within the Twin Lakes Chapter of the Navajo Nation, and to provide all associated engineering documentation and close‑out reports. The work includes removal of abandoned septic systems, soil testing, engineering design stamped by a licensed PE, acquisition of wastewater construction permits, installation of tanks, drainfields, and related infrastructure, and delivery of operation‑and‑maintenance manuals to homeowners. The contractor must comply with Navajo Nation environmental, labor, and insurance requirements, provide required bonds and guarantees, and complete the entire project by the end of 2026.
• Remove or crush‑in‑place existing septic systems and perform site‑specific soil analyses.
• Produce PE‑stamped engineering plans, obtain NNEPA wastewater construction permits, and install OWTS components (tanks, distribution boxes, drainfields, access risers).
• Deliver final inspection reports, O&M manuals, and maintain all required insurance, bonds, and Navajo sales‑tax compliance.