|(a) Within 90 days of finding that any of the 40 Code
of Federal Regulations Part 258, Appendix II constituents have been
detected at a statistically significant level above the groundwater
protection standards defined under §330.409(h), (i), or (j) of
this title (relating to Assessment Monitoring Program), the owner
or operator shall initiate an assessment of corrective measures. Such
an assessment shall be completed within 180 days of initiating the
(b) The owner or operator shall continue to monitor
in accordance with the assessment monitoring program as specified
in §330.409 of this title.
(c) The assessment shall include an analysis of the
effectiveness of potential corrective measures in meeting all of the
requirements and objectives of the remedy as described under §330.413
of this title (relating to Selection of Remedy), addressing at least
(1) performance, reliability, ease of implementation,
and potential impacts of appropriate potential remedies, including
safety impacts, cross-media impacts, and control of exposure to any
(2) time required to begin and complete the remedy;
(3) costs of remedy implementation; and
(4) institutional requirements such as state or local
permit requirements or other environmental or public health requirements
that may substantially affect implementation of the remedy or remedies.
(d) The owner or operator shall discuss the results
of the corrective measures assessment, prior to the selection of a
remedy, in a public meeting with interested and affected parties.
The owner or operator shall arrange for the meeting and provide notice
in accordance with the provisions of §39.501(e)(5) of this title
(relating to Application for Municipal Solid Waste Permit).