I. Operation and Maintenance Plans :
HUD Multifamily Accelerated Processing (MAP) Guide, HUD Handbook 4430.G (2020 ed., rev. Mar. 19, 2021) · 2026 edition · updated 2026-10-05 · United States
- An operation and maintenance plan (called an operation, maintenance and monitoring (OM+M) plan under the ANSI-AARST standards) must be administered in accordance with the applicable mitigation standard for any mitigation project. A condition shall be attached to the Firm Commitment requiring
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Chapter 9 Environmental Review and Requirements 9.6 Environmental Laws and Authorities
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that the Borrower operate and maintain the property consistent with the referenced OM+M plan for the duration of the insured mortgage. The project must submit the final OM+M plan to HUD after the radon mitigation system is installed. Given the ongoing risk associated with radon, the OM+M requirement for maintaining mitigation systems must be implemented when a mitigation system is present on the property.
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