1. Waste Management Innovation, Sustainability and Customer Value Brownfields 2011 Waste to Watts: Redeveloping Closed Landfills for Renewable Energy April 5, 2011

2. Company Overview Page 2©2011 Waste Management

3. Waste Management 2009 “Green” vs. “Traditional” Services Page 3©2011 Waste Management

4. We capture a variety of materials Page 4©2011 Waste Management

5. Waste Management Key Goals and Progress 2007 - 2009 Page 5©2011 Waste Management

6. Recycling Technologies Renewable Energy Conversion Technologies Consumer Products Focus on Sustainable Growth Page 6©2011 Waste Management

7. Renewable Energy Solutions Page 7©2011 Waste Management

8. Wheelabrator Technologies Leader in converting household solid waste into electricity 17 plants across the US Produces enough energy to power 650,000 homes, offsetting the need for 7 million barrels of oil Fifth level 18pt Trebuchet Page 8©2011 Waste Management

9. Landfill-gas-to-energy WM’s landfill gas-to-energy plants generate enough energy to power over 400,000 homes 124 facilities as of 1 st Q 2011 Page 9©2011 Waste Management

10. Landfill-gas-to-liquids WM formed a joint venture with Linde North America to build the world’s largest plant to convert landfill gas to ultra low- carbon liquefied natural gas Carbon emissions 97% lower than diesel Facility produces 13,000 gallons of LNG a day and helps power our fleet of 900 natural gas trucks in California Fifth level 18pt Trebuchet Page 10©2011 Waste Management

11. Wind energy Leaning Juniper  Phase I 67 turbines producing100 megawatts  47 turbines in Phase II Page 11©2011 Waste Management

12. Renewable Energy from Landfill Gas 12©2011 Waste Management

13. Waste Recovery: The Fourth “R” and RECOVER 13©2011 Waste Management

14. Types of Landfill Gas Projects Electricity Generation Small on-site plants, off-site plants, or blended with fossil fuel at utility plant Heating Fuel (“Medium BTU”) Medium BTU gas used in steam boilers, kilns, dryers, greenhouses, liquids disposal, etc. Process to Natural Gas (“High BTU”) Remove carbon dioxide, nitrogen, oxygen, and other constituents, and deliver methane to natural gas pipeline Vehicle Fuel Process to natural gas, then compress or liquefy to produce CNG or LNG for alternative fuel vehicles 14©2011 Waste Management

15. Inventory of Landfill Gas Projects Type of ProjectU.S.WM Electricity Generation310+92 Medium BTU110+22 High BTU20+9 Vehicle Fuel21 Totals440+124 15©2011 Waste Management

16. Power Generation Projects are the Most Common  Renewable energy incentives are directed to electricity  Renewable Portfolio Standards and Renewable Energy Credits  Federal tax credits  State subsidies, grants, and tax credits  Technology for electricity production is low risk  Access to market is universal (power lines)  More amenable to landfill gas quality  Less product quality risk (electricity vs. gas quality)  Electricity prices are less volatile than natural gas prices 16©2011 Waste Management

17. Waste Management Experience  Built first power plant in 1987  Own 62 plants, with 307 MW’s  Current Activity  8 Construction and commissioning  10Engineering and design  20+ Feasibility studies 17©2011 Waste Management

18. WM Renewable Energy, LLC  Corporate business unit within Waste Management responsible for:  Developing and constructing new projects  Owning the power plant assets  Managing the operations  Marketing the energy and renewable energy credits  Performing all accounting and financial obligations  WMRE coordinates with and is supported by WM technical and management staff at the landfill:  Coordination with landfill operations  Landfill gas supply  Compliance  Community relations 18©2011 Waste Management

19. LFGTE compared to Wind & Solar 19©2011 Waste Management

20. Renewable Energy From Solar Power 20©2011 Waste Management

21. -WM has extensive land and landfill assets in high value areas (East/West Coast) -WM is a leader in renewable energy markets -Currently trade/sell REC’s from more facilities than any other company in the US -Existing grid connections -Infrastructure is already built, no additional staff needed for development and management -Supports core landfill business, by creating a beneficial end use and other tangible/intangible benefits Waste Management & Solar Power Development: What are WM’s advantages? 21©2011 Waste Management

22. L&D Solar Development Project WMRE, CSMG and WMNJ selected the L&D Landfill as a prospective site based on: ‐Physical features (e.g., relatively flat terrain) ‐Existing electrical interconnect to the utility power grid from gas plant (inactive) ‐Alternate connection to the utility power grid from bioreactor (active) ‐Federal, State and Local stakeholder support for a solar power development project 22©2011 Waste Management

23. Site Background and Regulatory Status Located in South-Central New Jersey Disposal ended in 1986 Superfund Site (NJDEP lead) Record of Decision regarding remedy issued 9/30/04 23©2011 Waste Management

24. Site Features Landfill is ~200 acres, consisting of two sections ‐Mount Holly Section (western side) ‐Eastampton Section (eastern side) Clay cap ranging in thickness from 3 – 9 feet with an average permeability of 10 -7 Leachate collection system on Mount Holly section and on part of Eastampton Section ‐Built on intermediate liner overlying historical waste Active gas collection and control system ‐Average flow ~ 300 scfm ‐Gas quality ~ 45% CH 4 ‐Treatment via two utility flares 24©2011 Waste Management

25. 25©2011 Waste Management L&D Landfill

26. L&D Solar Development Project Project details: ‐2.25 MW PV system with an estimated annual energy production of 2.9 million kilowatt hours ‐PV system will use an estimated 16 acres of the flatter capped areas of the Mount Holly side of the landfill ‐Design to use thin watt film panels on non-penetrating spread footings ‐Facility will be connected to PSE&G’s electrical distribution system via one of the two options available on-site ‐System will be owned and operated by Waste Management 26©2011 Waste Management

27. 2.25 Megawatts ~ 16 Acres ©2011 Waste Management Page 27

28. WM 2010 Sustainability Report at http://www.wm.com/sustainability/index.jsp http://www.wm.com/sustainability/index.jsp Think Green educational site at http://www.thinkgreen.com/students-k-5 http://www.thinkgreen.com/students-k-5 Greenopolis on Facebook at http://www.facebook.com/greenopolis?v=app_4949752878 http://www.facebook.com/greenopolis?v=app_4949752878 For more information: Page 28©2011 Waste Management