Specifications include, but are not limited to: The scope of work for this project includes civil, structural, architectural, mechanical, electrical, plumbing, and life safety system upgrades to each of the four vent buildings serving the Sumner and Callahan Tunnels. The work also includes replacements of pumps and associated power and control equipment in the Boston, East Boston and the Mid-River pump stations serving the Callahan Tunnel as well as pump stations in the basements of Vent Building No. 12 and No. 13. The work also includes replacements of pumps and associated power and control equipment in the East Boston and Mid-River pump stations of the Sumner Tunnel. Installation of additional power and control equipment in the Boston portal pump station within the Sumner Tunnel