Proposal for Compound Wastewater Construction for Ojo Encino Chapter

This solicitation calls for the design, removal of an existing septic system, and construction of a new Commercial On‑Site Wastewater Treatment System (OWTS) for the Ojo Encino Chapter compound, which serves as an emergency shelter. The contractor must perform soil investigations, obtain all required tribal and environmental permits, design the system (PE‑stamped), and complete construction, commissioning, and close‑out documentation by the end of 2026. The award will favor Navajo‑owned firms but is open to all qualified contractors. • Remove and dispose of the current septic system, including pumping and crushing. • Conduct geotechnical borings, percolation tests, and design a sealed OWTS meeting Navajo Nation standards. • Secure NNEPA wastewater construction permit, SWPPP, traffic‑control, and site‑safety plans; then execute excavation, tank installation, pipework (≤45°), electrical connections, and erosion control. • Provide O&M manuals, as‑built drawings, final inspection, and all required close‑out reports.