310 CMR 40.0028
Well Installation, Geolocation, Maintenance and Security
RPs, PRPs, and Other Persons undertaking response actions shall ensure that any well
installed or constructed for the purposes of sampling, monitoring or remediating environmental
media or environmental conditions as part of response actions conducted under the MCP:
(a) is documented as to its location (latitude and longitude) in a form provided by the
Department for such purposes; and
(b) is maintained and secured throughout its period of service and until it is properly
decommissioned to prevent the introduction of contaminants to the subsurface environment
or the exacerbation of groundwater contamination by the vertical movement of water within
the borehole or annular space.