On November 30, 2010 EPA promulgated Subpart W: Petroleum and Natural Gas Systems of the Greenhouse Gas Reporting Rule. As part of the provisions outlined in this rule, the EPA stated that the Agency would allow certain owners or operators to use best available monitoring methods (BAMM) in lieu of specified parameters outlined for calculating greenhouse gas emissions for the petroleum and natural gas systems source category of the greenhouse gas reporting rule. EPA is giving notice that the Agency has initiated the reconsideration process in response to requests for reconsideration of certain provisions in the regulations. First, EPA has been asked to reconsider the requirement to submit requests to use best available monitoring methods during the 2011 calendar year by April 30, 2011 and pursuant to its authority under CAA section 307(d)(7)(B) consequently is extending the deadline contained in those provisions until July 31, 2011. Second, EPA has also been asked to reconsider the time period during which owners and operators of certain specific sources could automatically use BAMM without having to request approval by the Administrator. As a result of this second request, pursuant to its authority under CAA section 307(d)(7)(B) EPA is also extending the date by which owners and operators of certain specific sources would not be required to request approval by the Administrator for the use of BAMM from June 30, 2011 until September 30, 2011.