EPA is finalizing amendments to certain provisions related to the use of best available monitoring methods for the Petroleum and Natural Gas Systems source category of the Greenhouse Gas Reporting Rule. Specifically, EPA is extending the time period during which owners and operators of facilities would be permitted to use best available monitoring methods in 2011, without submitting a request to the Administrator for approval. EPA is also expanding the list of types of emissions sources for which owners and operators are not required to submit a request to the Administrator to use best available monitoring methods during 2011 and extending the deadline by which owners and operators of facilities can request use of best available monitoring methods for beyond 2011.