Digester Cleaning

The City of St. Charles is seeking qualified contractors to clean and facilitate inspection of two egg‑shaped anaerobic digesters and one sludge storage tank. This work involves thorough cleaning, removal of accumulated sludge, and preparation for inspection to ensure operational safety and compliance. • Scope includes cleaning of two anaerobic digesters and one sludge tank. • Contractor must provide inspection readiness and certify cleanliness. • All submissions must be electronic; bid opening scheduled for September 16, 2026.