The Government Publishing Office requires a contractor to rehabilitate approximately 510 linear feet of 3"-4" cast iron sanitary sewer pipes using the Cured-In-Place Pipe (CIPP) lining method. The work involves clearing blockages and restoring the structural integrity and functionality of the under-slab sewer system. The contractor must use advanced techniques to detect and locate all clogged, damaged, or defective pipelines causing the drainage issues. The services are to be performed at the Government Publishing Office location. No specific budget or non-bid timelines are detailed in this description.