Q453. When must I prepare a monitoring plan?

A453. If your data collection methods change as you gain experience with monitoring equipment and develop more effective procedures for data management, your monitoring plan must be revised to reflect these changes.  All facilities and suppliers that are subject to the rule must prepare a monitoring plan by January 1 of the year they are required to begin collecting data on their greenhouse gas emissions.  Monitoring plans DO NOT need to be submitted to EPA for approval; rather, they must be kept on site as a recordkeeping requirement.