['Waste']
['Solid Waste']
05/04/2022
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...
(a) Based on the schedule established under §258.57(d) for initiation and completion of remedial activities the owner/operator must:
(1) Establish and implement a corrective action ground-water monitoring program that:
(i) At a minimum, meet the requirements of an assessment monitoring program under §258.55 ;
(ii) Indicate the effectiveness of the corrective action remedy; and
(iii) Demonstrate compliance with ground-water protection standard pursuant to paragraph (e) of this section.
(2) Implement the corrective action remedy selected under §258.57 ; and
(3) Take any interim measures necessary to ensure the protection of human health and the environment. Interim measures should, to the greatest extent practicable, be consistent with the objectives of and contribute to the performance of any remedy that may be required pursuant to §258.57 . The following factors must be considered by an owner or operator in determining whether interim measures are necessary:
(i) Time required to develop and implement a final remedy;
(ii) Actual or potential exposure of nearby populations or environmental receptors to hazardous constituents;
(iii) Actual or potential contamination of drinking water supplies or sensitive ecosystems;
(iv) Further degradation of the ground-water that may occur if remedial action is not initiated expeditiously;
(v) Weather conditions that may cause hazardous constituents to migrate or be released;
(vi) Risks of fire or explosion, or potential for exposure to hazardous constituents as a result of an accident or failure of a container or handling system; and
(vii) Other situations that may pose threats to human health and the environment.
(b) An owner or operator may determine, based on information developed after implementation of the remedy has begun or other information, that compliance with requirements of §258.57(b) are not being achieved through the remedy selected. In such cases, the owner or operator must implement other methods or techniques that could practicably achieve compliance with the requirements, unless the owner or operator makes the determination under §258.58(c) .
(c) If the owner or operator determines that compliance with requirements under §258.57(b) cannot be practically achieved with any currently available methods, the owner or operator must:
(1) Obtain certification of a qualified ground-water scientist or approval by the Director of an approved State that compliance with requirements under §258.57(b) cannot be practically achieved with any currently available methods;
(2) Implement alternate measures to control exposure of humans or the environment to residual contamination, as necessary to protect human health and the environment; and
(3) Implement alternate measures for control of the sources of contamination, or for removal or decontamination of equipment, units, devices, or structures that are:
(i) Technically practicable; and
(ii) Consistent with the overall objective of the remedy.
(4) Notify the State Director within 14 days that a report justifying the alternative measures prior to implementing the alternative measures has been placed in the operating record.
(d) All solid wastes that are managed pursuant to a remedy required under §258.57 , or an interim measure required under §258.58(a)(3) , shall be managed in a manner:
(1) That is protective of human health and the environment; and
(2) That complies with applicable RCRA requirements.
(e) Remedies selected pursuant to §258.57 shall be considered complete when:
(1) The owner or operator complies with the ground-water protection standards established under §258.55(h) or (i) at all points within the plume of contamination that lie beyond the ground-water monitoring well system established under §258.51(a) .
(2) Compliance with the ground-water protection standards established under §258.55(h) or (i) has been achieved by demonstrating that concentrations of appendix II constituents have not exceeded the ground-water protection standard(s) for a period of three consecutive years using the statistical procedures and performance standards in §258.53(g) and (h) . The Director of an approved State may specify an alternative length of time during which the owner or operator must demonstrate that concentrations of appendix II constituents have not exceeded the ground-water protection standard(s) taking into consideration:
(i) Extent and concentration of the release(s);
(ii) Behavior characteristics of the hazardous constituents in the ground- water;
(iii) Accuracy of monitoring or modeling techniques, including any seasonal, meteorological, or other environmental variabilities that may affect the accuracy; and
(iv) Characteristics of the ground-water.
(3) All actions required to complete the remedy have been satisfied.
(f) Upon completion of the remedy, the owner or operator must notify the State Director within 14 days that a certification that the remedy has been completed in compliance with the requirements of §258.58(e) has been placed in the operating record. The certification must be signed by the owner or operator and by a qualified ground-water scientist or approved by the Director of an approved State.
(g) When, upon completion of the certification, the owner or operator determines that the corrective action remedy has been completed in accordance with the requirements under paragraph (e) of this section, the owner or operator shall be released from the requirements for financial assurance for corrective action under §258.73 .
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