There are two important GHGRP deadlines for Reporting Year 2010 you should be aware of:
Every facility or supplier that is required to report must submit their annual GHG report by September 30, 2011.
The annual report for reporting years (RY) 2012 and beyond must be submitted no later than March 31st of the year following the reporting year (unless the 31st is a Saturday, Sunday, or federal holiday in which case the reports are due on the next business day). A facility must register at least 60 days before the reporting deadline.
For information on the reporting requirements, please visit the EPA's Greenhouse Gas Reporting Program website at http://www.epa.gov/ghgreporting/reporters/.