Specifications include, but are not limited to: removal and disposal of spent carbon from and installation of virgin carbon into vessels located at Palmyrita Water Treatment Facility (fifteen vessels) during the contract term. Typically, RPU expect to have 1 to 5 vessels to be changed at each visit. The usual frequency for replacing the vessels varies between 14 to 16 months. The best time to replace the vessels are Monday through Friday from 6:30 am to 4:00 pm, and early in the week scheduling is preferred. Each installation shall include an inspection and disinfection treatment of the vessel. These carbon and vessels remove 1,2-dibromo-3-chloropropane (DBCP), a volatile organic carbon (VOC), from the contaminated groundwater aquifer. The treated groundwater is discharged into distribution system for human consumption. The bidder shall include all necessary costs to fulfill this requirement in the bid price whether all such specific requirements are mentioned or not.