Operational Assistance and Maintenance for Digester Gas System

The City of Raleigh is requesting proposals for operational assistance and maintenance services for the Neuse River Wastewater Treatment facility's digester gas cleaning system, with proposals due October 29, 2026 at 2:00 p.m. EST. The system is manufactured by DMT Carborex and treats digester gas to remove moisture, hydrogen sulfide, siloxanes, and volatile organic compounds prior to beneficial use or renewable natural gas production.

The scope encompasses remote operations support (estimated 10 hours per week), quarterly maintenance visits (four annually), gas quality monitoring and testing, media replacement with three competitive quotes, and emergency repair labor. The contractor must demonstrate experience with municipal digester gas treatment systems and renewable natural gas facilities. Required insurance includes commercial general liability coverage of $1 million per occurrence and $2 million aggregate. All hourly rates must be fully burdened to include overhead, profit, lodging, meals, and transportation; material markup cannot exceed 15 percent.

The contract term will be defined in the executed agreement, with the sample template allowing an initial term plus optional renewals not exceeding five years total. Pricing is structured as a not-to-exceed annual amount with separate line items for each service category.

Evaluation is staged: initial proposal scoring on corporate background and references (20 points), financial stability (15 points), project understanding and approach (20 points), team experience and capacity (20 points), and proposed cost (25 points), followed by potential interviews or demonstrations for selected firms.

The contractor must provide audited or reviewed financial statements, compiled statements with supporting documentation, or a certified CPA statement to demonstrate financial stability. Contractors must acknowledge the Resource Recovery Division's Environmental Management System and sign the EMS Acknowledgement Form. Written questions are due October 5, 2026 at 1:00 p.m., with City responses anticipated by October 16. No pre-proposal conference is required. Proposals must be submitted in one signed original, one PDF on USB Flash Drive, and three printed copies addressed to Jeffrey Bognar, 8500 Battle Bridge Road, Raleigh, NC 27610.