Variable Energy Surcharge

Effective May1, 2012 through May 31, 2012: $2.47

Our operating costs vary depending upon energy prices. A variable energy surcharge will be included as a separate line item on each invoice. The surcharge is based on the Monthly U.S. Average On-Road Diesel Price as published by the U.S. Department of Energy, Energy Information Administration on its website at http://tonto.eia.doe.gov/oog/info/wohdp/diesel.asp. We reserve the right to apply the surcharge in our sole discretion. Please note that we do not establish the Monthly U.S. Average On-Road Diesel Price. To learn more about recent energy price developments, please contact the Department of Energy at (202) 586-6966 or go to the U.S. Department of Energy. We will monitor the need to continue the surcharge and will adjust accordingly.

The following table illustrates the Variable Energy Surcharge