1. District of Columbia Dept. of General Services Natural Gas RFP Webinar November 13, 2012 1:30 pm ET

2. Customer: District of Columbia Department of General Services Natural Gas Supply starting: January 1, 2013 415 Accounts –including 9 new accounts –all are on non-Interruptible distribution service with WGL –6 likely inactive accounts are not included in totals Approx. 977,000 therms per year Term: 1, 2, and 3 year contract terms 2 Pricing Products Broker fee Web site for Updates: http://dcrfps.ameresco.com http://dcrfps.ameresco.com 2 Natural Gas RFP Specifications

3. RFP Responses: –Kim Marburger, Ameresco –kmarburger@ameresco.comkmarburger@ameresco.com –704-916-3508 Broker Agreements: –Kathy Abernethy, Ameresco –kabernethy@ameresco.comkabernethy@ameresco.com –704-916-3531 3 Natural Gas RFP Contacts

4. RFP Posted to RFP Web site: Friday, November 9, 2012 Responses Due: 11 am ET on Tuesday, November 27, 2012 Anticipated Execution: by Noon ET on Wednesday, December 5, 2012 –DC may be able to execute December 4 after Council meeting –will lock NYMEX sometime after contract execution Service Begins: January 1, 2013 4 Natural Gas RFP Timeline

5. Contract: –Strong Preference for NAESB with GAPA and Special Provisions Government Acquisition Provision Addendum Articles 18.5.1. – 18.5.5 added Pp. 5-11 taken from the District of Columbia’s “Standard Contract Provisions” for Supplies and Services Contracts, November 2004 (some but not all provisions) –Bidders’ red-line additions to Special Provisions will be received, but unwillingness / inability to accept DC provisions may be a factor in evaluation process Pricing Products –Fixed Price (25% and 10% swing) –Fixed Basis (0%, 10%, 20%, 100%) 5 Natural Gas RFP Contract and Pricing

6. Fixed Price (25% and 100% swing options): –Basis Asking Bidders to hold open Fixed Basis quote from bid deadline (11 am ET on Tuesday, November 27, 2012) to Noon ET on Wednesday, December 5, 2012 –NYMEX Asking Bidders to enter quote, but DGS intends to allow winning Supplier to adjust NYMEX to the actual screen at the time of notification of award and actual execution –Once Basis and NYMEX are locked… “the price is the price” within the swing % selected Fixed Basis (0%, 10%, 20%, 100% swing options): –Basis Asking Bidders to hold open Fixed Basis quote from bid deadline (11 am ET on Tuesday, November 27, 2012) to 2 pm on Noon ET on Wednesday, December 5, 2012 –NYMEX locked prospectively for specific quantities by month sometime after contract execution –Once Basis is locked.. “the Basis price is the Basis price” within the swing % selected Fixed NYMEX is fixed NYMEX for the specific volumes locked 6 Pricing Products

7. GAPA 18.5.1: “This contract has a not-to-exceed amount of $12,646,615 multiplied by term of the contract (in years). Seller understands and agrees that in no event shall the Buyer’s liability to the Seller exceed such amount unless the Buyer’s contacting officer authorizes an increase in this amount in advance and in writing”. –contract must include a specific figure –should provide ample allowance for volume and price variance GAPA Article 10 (added provisions). Multi-year Contract. Section deals with appropriation of funds. –deals with a specific circumstance –does not authorize Buyer to terminate so as to do a deal with another provider 7 Specific Special Provisions

8. Thank You! 8