The 2024 Digester and Storage Tank Cleaning Project will include removal and legal disposal of anaerobically digested sludge from two anaerobic digesters and a sludge storage tank at the District’s Nine Springs Wastewater Treatment Facility. The total volume of sludge to be removed, processed, and disposed of is approximately 110,000 gallons (134 tons on a dry weight basis) from each of the two digesters and approximately 35,000 gallons (45 tons on a dry weight basis) from the storage tank. Once emptied, the interior of all tanks will be cleaned of all residual material and inorganic waste to the extent practicable. Nine Springs Wastewater Treatment Facility is located at 1610 Moorland Road, Madison, Wisconsin. See attached excerpts from construction drawings for reference.