Primary and Secondary Biofilter Rehabilitation at the Hartford Water Pollution Control Facility (HWPCF)

The Metropolitan District (MDC) is requesting sealed bids for primary and secondary biofilter rehabilitation at the Hartford Water Pollution Control Facility under ITB 2026B-19, with bids due August 20, 2026 at 9:00 a.m. Eastern Time and mandatory pre-bid conference and facility tour on July 23, 2026 at 10:30 a.m. at the Construction Trailer, 240 Brainard Road, Hartford. An 11% Small Business Enterprise set-aside applies to the total awarded contract value, with mandatory subcontracting at that minimum level unless a waiver is granted based on good faith efforts; executed SBE subcontracts must be submitted within 14 calendar days of Notice of Award.

The scope includes testing, removal, off-site disposal, inspection, and replacement of biofilter media and associated liners. The Primary Biofilters contain approximately 1,400 tons of media composed of softwood (70%), bark nuggets (20%), and leaf compost (10%) across three cells. The Secondary Biofilters contain approximately 650 tons of wood chip and leaf mulch media across four cells, plus removal and replacement of the stone support layer. All disposal must occur at appropriately permitted facilities in compliance with federal, state, and local regulations. Performance testing of new media must be completed within 30 calendar days after each cell returns to service, with a target hydrogen sulfide removal efficiency of 99 percent.

The contract duration is seven months or 210 calendar days from the execution date. Bidders must quote firm fixed prices on an F.O.B. destination basis. Pricing remains firm with no increases allowed in the first 12 months unless agreed to in writing by the MDC. Contingency allowances of $60,000 for Primary Biofilters and $40,000 for Secondary Biofilters are available for undocumented site conditions and traffic control.

Bidders must provide comprehensive specifications and descriptive literature for proposed materials, Schedule of Prices (Appendix A), references (Appendix B), Safety Program Questionnaire and OSHA Compliance History Certification, Affidavit of Non-Collusion, Fair Employment Practices Qualifications Form, Acknowledgment of Receipt of Addenda, Certificate of Authority, Certificate of Insurance, SBE forms, and prevailing wage documentation. Connecticut Wage Rates apply to all construction work. Required insurance includes Commercial General Liability ($1,000,000 each occurrence, $2,000,000 aggregate), Umbrella Liability ($5,000,000 each occurrence), Automobile Liability ($1,000,000 combined single limit), Workers Compensation as required by Connecticut law, and Pollution Liability ($1,000,000 each occurrence).