Digester Gas System – Operational Assistance and Maintenance Services

The City of Raleigh, North Carolina is requesting proposals for operational assistance and maintenance services on its Neuse River Wastewater Treatment facility's DMT Carborex digester gas cleaning system, with proposals due October 29, 2026 at 2:00 PM EST.

The contractor will serve as the primary technical resource for the digester gas treatment system, providing remote operational support, quarterly maintenance visits (four per year minimum), gas quality monitoring and testing, media management and replacement, performance reporting, and 24-hour emergency response capability for critical system failures. The contractor must demonstrate three recent municipal references, documented experience with similar digester gas or Renewable Natural Gas systems within the past five years, and financial stability supported by audited or reviewed financial statements.

Pricing shall be fixed hourly rates, fully burdened to include overhead, profit, lodging, meals, and transportation, with separate annual not-to-exceed amounts for operational services, maintenance services, gas quality monitoring, media replacement, and emergency repair labor. Material and parts markup shall not exceed 15 percent. The cost proposal must be submitted in a sealed envelope with a minimum of three copies using the provided Proposal Cost Form.

Evaluation weighting is as follows: corporate background and references (20 percent), firm financial stability (15 percent), project understanding and approach (20 percent), team experience and capacity (20 percent), and proposed cost (25 percent). The contract term is not specified but the RFP references renewal options allowing for potential multi-year terms.

Written questions are due October 5, 2026 by 1:00 PM EST, with anticipated City responses by October 16. No pre-proposal meeting or site visit is required, though attendance is encouraged if one is conducted. The City reserves the right to conduct interviews or demonstrations with short-listed firms and reserves the right to reject any or all proposals or cancel the solicitation.