The Rhode Island Department of Environmental Management (RIDEM) usually requires the following steps in the investigation and remediation of a former MGP site:
- Site Investigation Report (SIR), includes Remedial Alternative Evaluation
- Short-Term Response Actions
- Program Letter/Remedial Decision Letter
- Remedial Action Work Plan
- Remedial Construction
- Remedial Action Completion Report
Following numerous Site Investigations undertaken primarily between 1996 and 2010, a January 2011 Site Investigation Data Report (SIDR) and a July 2011 Remedial Alternative Evaluation (RAE) Report served to complete the Site Investigation Report (SIR) required by RIDEM. As requested by members of the public, National Grid prepared a draft Public Involvement Plan (PIP). A notification letter dated November 26th, 2012 was sent to the mailing list regarding the availability of the draft Public Involvement Plan (PIP) for the Tidewater Environmental Project. A public meeting was held on January 29, 2013 to discuss public comments to the PIP. The PIP was finalized with public input in October 2013. A Limited Design Investigation (LDI) program to collect supplemental data to facilitate the design of the Site remedy was performed between September 21, 2017 and December 28, 2017. On April 19, 2018 RIDEM released a Remedial Decision Letter identifying the preferred remedial alternative and authorizing the development of a Remedial Action Work Plan (RAWP). In June 2018, National Grid submitted a RAWP to RIDEM for the Tidewater Environmental Project. A Community Outreach Even will be held on July 17, 2018 to disseminate information regarding the RAWP and the planned remediation and engage in further dialogue with the community about the Site.