Many technologies can be used to clean up compounds in the environment, but not all technologies are suitable for every site. Before the cleanup phase of a project begins, state environmental regulations require that multiple technologies be screened to determine whether they will be effective at a given site. Technologies that pass this screening process must then be further evaluated using specific criteria established by the regulations. These criteria include effectiveness, reliability, technical difficulty, relative cost, short-term and long-term risks, timeliness, and comparative benefits.
For the Site, National Grid conducted a Phase III screening and evaluation of the following categories of technologies:
Technologies that would build a barrier to limit contact with the compounds, or to limit their migration.
Technologies that would treat the compounds in place, i.e., without removing them from the Site.
Technologies that would remove the compounds from the Site so they could be recycled, treated, or disposed of at an approved facility.