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EPA is proposing significant new use rules (SNURs) under the Toxic Substances Control Act (TSCA) for 13 chemical substances which are the subject of premanufacture notices (PMNs) . This action would require persons to notify EPA at least 90 days before commencing manufacture (defined by statute to include import) or processing of any of these 13 chemical substances for an activity that is designated as a significant new use by this proposed rule. If this proposed rule is made final, persons may not commence manufacture or processing for the significant new use until they have submitted a Significant New Use Notice, and EPA has conducted a review of the notice, made an appropriate determination on the notice, and has taken any actions as are required as a result of that determination.

Amends rules to provide manufacturers with greater compliance flexibility and strengthen and clarify the performance requirements they are expected to meet in designing and developing robust On-Board Diagnostic (OBD) Systems.

Establishes rules regarding hydronic piping, special piping and storage systems, solar thermal energy systems, fuel gas, plumbing systems, water supply and distribution, electrical, and referenced standards. The rules are proposed to comply with the five years rule review and to update the current Residential Code of Ohio to reflect the 2018 edition of the "International Residential Code".

Establishes rules to increase energy efficiency saving s in the state by establishing statewide energy efficiency standards for single-duct and dual-duct portable air conditioners.

This action proposes reconsideration amendments to the new source performance standards (NSPS) at 40 Code of Federal Regulations (CFR) part 60, subpart OOOOa (2016 NSPS OOOOa) . The Environmental Protection Agency (EPA) received petitions for reconsideration on the 2016 NSPS OOOOa. In 2017, the EPA granted reconsideration on the fugitive emissions requirements, well site pneumatic pump standards, and the requirements for certification of closed vent systems by a professional engineer based on specific objections to these requirements. This action proposes amendments and clarifications as a result of reconsideration of these issues. The proposed amendments also address other issues raised for reconsideration and make technical corrections and amendments to further clarify the rule.

The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its regulations to incorporate by reference the 2015 and 2017 Editions of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPV Code) and the 2015 and 2017 Editions of the ASME Operation and Maintenance of Nuclear Power Plants, Division 1: OM: Section IST (OM Code), respectively, for nuclear power plants. The NRC is also proposing to incorporate by reference two revised ASME code cases. This action is in accordance with the NRC's policy to periodically update the regulations to incorporate by reference new editions of the ASME Codes and is intended to maintain the safety of nuclear power plants and to make NRC activities more effective and efficient.

EPA is proposing significant new use rules (SNURs) under the Toxic Substances Control Act (TSCA) for 66 chemical substances which were the subject of premanufacture notices (PMNs) . The chemical substances are subject to Orders issued by EPA pursuant to section 5(e) of TSCA. This action would require persons who intend to manufacture (defined by statute to include import) or process any of these 66 chemical substances for an activity that is proposed as a significant new use to notify EPA at least 90 days before commencing that activity. The required notification initiates EPA's evaluation of the intended use within the applicable review period. Persons may not commence manufacture or processing for the significant new use until EPA has conducted a review of the notice, made an appropriate determination on the notice, and has taken such actions as are required with that determination.

The Pipeline and Hazardous Materials Safety Administration (PHMSA) proposes to amend the Hazardous Materials Regulations (HMR) to maintain alignment with international regulations and standards by incorporating various amendments, including changes to proper shipping names, hazard classes, packing groups, special provisions, packaging authorizations, air transport quantity limitations, and vessel stowage requirements. These revisions are necessary to harmonize the HMR with recent changes made to the International Maritime Dangerous Goods Code, the International Civil Aviation Organization's Technical Instructions for the Safe Transport of Dangerous Goods by Air, and the United Nations Recommendations on the Transport of Dangerous Goods--Model Regulations. Additionally, PHMSA proposes several amendments to the HMR that would allow for increased alignment with the Transport Canada, Transportation of Dangerous Goods (TDG) Regulations.

In this action, the Environmental Protection Agency (EPA) is soliciting comment on several aspects of the 2015 Standards of Performance for New Residential Wood Heaters, New Residential Hydronic Heaters and Forced-Air Furnaces (2015 NSPS) in order to inform future rulemaking to improve these standards and related test methods. This action does not propose any changes to the 2015 NSPS, but does take comment on a number of aspects of the rule, including the compliance date for the Step 2 emission limits, Step 2 emission limits for forced- air furnaces, hydronic heaters and wood heaters, Step 2 emission limits based on weighted averages versus individual burn rates, transitioning to cord wood certification test methods, compliance audit testing, third-party review, electronic reporting tool, and warranty requirements.

In this action, the EPA proposes to amend the 2015 New Source Performance Standards (NSPS) for new residential hydronic heaters and new forced-air furnaces by adding a two-year "sell-through" period for all affected new hydronic heaters and forced-air furnaces that are manufactured or imported before the May 2020 compliance date to be sold at retail through May 2022. This will allow retailers additional time, after the May 2020 effective date of the "Step 2" standards, for the sale of "Step 1" compliant hydronic heaters and forced-air furnaces remaining in inventory. The EPA is also taking comment on whether a sell-through period for all affected new residential wood heaters is appropriate following the May 2020 compliance date and, if so, how long a sell-through period is needed and why. In addition, this action is taking comment on whether the current minimum pellet fuel requirements should be retained and, if so, whether they should be revised.