Secondary Digester Number 1 Cleaning

The New Hampshire Department of Environmental Services (NHDES) Winnipesaukee River Basin Program is seeking a qualified contractor to perform comprehensive cleaning services for Secondary Digester Number 1 at the Franklin Wastewater Treatment Facility located at 528 River Street, Franklin, NH. The primary objective is to clean out, remove, dewater, and dispose of residual solids from the secondary anaerobic digester using centrifuges, with specific requirements to achieve a minimum 24% cake solids and 95% solids recovery. The work must be completed between April 1, 2025, and May 16, 2025, with strict operational constraints limiting work hours to 8 hours per day (7:00am-3:00pm), Monday through Friday. Proposals are due by 3:00pm on March 15, 2025, and firms are encouraged to arrange site visits and evaluate samples before submission. The contractor must provide their own power source, equipment, polymer, and watertight containers for material disposal, and will be evaluated primarily on the lowest total cost from a qualified firm meeting all technical and safety requirements. Key qualifications include compliance with confined space regulations, stormwater management practices, and proper disposal of all materials in accordance with federal, state, and local regulations.

The procurement does not specify explicit set-aside designations or restrictions on participating organizations, though contractors must be registered with the NH Secretary of State's Office. The successful bidder will be required to maintain specified insurance coverage and demonstrate technical competence in handling complex wastewater treatment facility cleaning operations. Payment for the project will be structured in three phases: 10% upon mobilization, 80% following satisfactory dewatering and verified proper disposal, and a final 10% after completed cleanup and demobilization. While a specific budget range is not disclosed, the detailed technical requirements suggest a sophisticated and potentially significant project scope. The contract appears to be focused on technical capability, safety compliance, and cost-effectiveness, with an emphasis on precise execution of digester cleaning services that minimize operational disruptions to the existing wastewater treatment infrastructure.