Specifications include, but are not limited to: The cleaning of 2 digesters at the Fresno/Clovis Regional Wastewater Reclamation Facility, this is part of a rotating maintenance program that was established to improve efficiencies. The digesters #3 and #7 (75 foot diameter and 85 foot diameter, respectively) will contain approximately 10 feet of accumulated solids consisting of sludge, sand and other debris normally found in wastewater digesters. Work shall include the removal of access hatches and cleaning of the digesters, screening of pumped digester sludge (capable of removing particles 1/4 inch and larger), a dewatering process to remove water from the screened sludge resulting in a minimum of 20% bio solids by weight, and transferred to a designated staging area (the fluid separated during dewatering process will be deposited into a plant drain.)