Specifications include, but are not limited to: Construction of a new primary digester with associated yard piping, installation of new thickened blended sludge piping between the Solids Handling Building and the Digester Control Building, installation of new thickened blended sludge piping in the Digester Control Building for all five primary digesters, installation of a new mixing pump and sludge piping for Digester No. 5 in the Digester Control Building, installation of new hot water piping, valves, pump and heat exchanger for Digester No. 5, relocation of existing sludge and hot water control valves, installation of new low pressure sludge gas piping, condensate traps and piping in new below grade vault structures, installation of new waste gas flare equipment and relocation of an existing waste gas flare to the new flare site.