Chemical Feed Building Posted on February 11, 2016December 21, 2023 by Weston & Sampson (A) Chemical Feed Building for Hillsborough WWTP In 2010, Weston & Sampson installed a new chemical feed building for the Hillsborough, NH wastewater plant. Work also included repairs to the lagoon aeration system, and new blowers. BACK Looking for assistance with your Construction project? How can we help? Posted in Construction, Treatment Facilities and tagged Hillsborough.