Specifications include, but are not limited to: Providing the injection of expanding polymers to stabilize and seal soils at bridge and pavement sites during the period July 1, 2021 through November 30, 2022. 1. I-93 NB and SB over Hubbard Brook in Thornton, NH (bridges Thornton 152/073 and Thornton 153/074) at mile marker 93.2. The work will include overhead injection at joint locations shown to stabilize soils above the existing concrete box culvert to facilitate overhead concrete repairs (see Exhibit B 3 of 3). Injection holes shall be sufficiently spaced to assure that soils can bridge above the culvert during concrete repairs. 2. NH 3A in Franklin, NH (GPS Coordinates 43.460586, -71.660695). The work shall consist of injection to provide soil densification to strengthen base and subbase materials under concrete pavement. Pavement profiles will be taken every 10 feet in a longitudinal direction on the edges and center of the work area. Profile spots will be taken before and after injections, monitored during injection, and documented for review.