1195-25 add 1.pdf

This is an addendum to IFB 1195-25 issued by the Town of Blacksburg, Virginia Purchasing Administration Office for the Upper Harding Basin Sanitary Sewer Rehabilitation Project. The project involves rehabilitation of manholes, repair of sewer system defects and service laterals, installing new sewers and manholes, installation of cured-in-place pipe lining, and other manhole rehabilitation work. The work includes televising existing sewers, cleaning and inspection preparation. The project's objective is to remove excessive infiltration and inflow to sewers in the basin to reduce or eliminate sanitary sewer overflows. CHA Companies prepared the plans and specifications, which were signed and sealed by Mark Lambert on 12/13/24.

The addendum adds Section 02651A specifications for UV-cured CIPP lining, revises the bid form, and clarifies technical requirements. Approved CIPP products include Saertex Liner, Inliner STX, IMPREGLiner, Berolina-Liner System, and Alphaliner. The contractor must have successfully installed at least 1,000,000 feet of CIPP over 10 years, with at least 100,000 feet being UV light cured CIPP. The project will use ASTM F2019-20 standards for glass fiber reinforced UV-cured CIPP installation. Required liner thicknesses range from 3mm to 15mm depending on pipe diameter and depth. The work requires traffic control, bypass pumping, and restoration of affected areas.