TJ-528-009A - Grey Water and Sewage Modifications.pdf

This document is a technical specification and design drawing set for grey water and sewage system modifications aboard the NOAA Ship Thomas Jefferson, a federal research vessel operated under NOAA. The drawings depict comprehensive piping system modifications, including removal of existing equipment and installation of new piping, valves, pumps, and related components across multiple deck levels and tank locations (sewage tank, sludge tank, ballast tank, bilge holding tank, and grey water holding tank).

The modification work encompasses several key systems: piping installations for the IWO sewage lift station (new piping, lag strip scale), sewage system piping modifications for above-tank-top configurations, grey water forward piping modifications, grey water system piping mods above tank top, and sewage/grey water discharge cross-connections at multiple profile views. Material specifications indicate use of carbon steel, stainless steel, bronze fittings, ductile iron components, and various valve types (ball valves, gate valves, check valves, strainers). The drawings include detailed system modification specifications across multiple sections with dimensional callouts, material lists referencing ASTM standards (A-53, A-106, A-182, A162), and installation requirements coordinated with existing vessel infrastructure. The document references related specification documents including NOAA service and sanitary system diagrams, structural standards, and doors/hatches/windows/airports documentation, establishing this as part of a broader vessel modernization or maintenance contract for the National Oceanic and Atmospheric Administration.