The WQCP is seeking qualified firms to dewater and clean each vessel (as identified in the Vessel Site Plan) interiors. The WQCP will contract independently for hauling and disposal of the dewatered material and bare any related disposal costs. Prior to the Consultant’s arrival, plant staff will drain each vessel at or below the side cleaning access hatches. Each of the vessels has at least two access and ventilation ports on the covers with openings approximately 36” in diameter, plus entry ports at ground level measuring 36” wide by 48” high. Digester 4 has a floating cover, and Digester 1, 3, 5 and the sludge storage tank has a fixed cover. WQCP staff will lower the sludge level in each digester to approximately 13 feet above the cone bottom, remove the access covers and ventilation covers, and provide ventilation prior to Consultant’s entry into the vessel.
