© 2015 HDR, Inc., all rights reserved.

Extending the Life of WTE Facilities Another 25 Years

WTE CAPITAL REFURBISHMENTS

PRESENTATION OVERVIEW

Overview of the of U.S. WTE fleet

Typical WTE Maintenance practices and drivers for Capital Improvement Projects

Life cycle of major boiler and APC components

Super alloy overlays/materials & facility enhancement projects

80+ Facilities Currently Operating o 60+ mass burn o 10+ RDF

Major Benefits o Proven Technology o Can process 99%+ of waste stream o Direct Combustion Process o Volume Reduction of 85%+ o Generate Electricity and/or Steam o Sell Recovered Metals

OVERVIEW OF WTE FACILITIES IN US

H-POWER Kapolei, HI

Wheelabrator BRESCO Baltimore, MD

Stagnant tipping fees and competition with landfills

Drop in energy prices

Drop in ferrous metal market

Lack of regulatory incentives

Increase in O&M costs

DIFFICULT ECONOMIC CLIMATE

Annual or bi-annual scheduled outages Unscheduled

outages Extended cold iron

outages

WTE PLANT MAINTENANCE PRACTICES

DESPITE THE FACT THAT THESE FACILITIES PERFORM COMPREHENSIVE ROUTINE MAINTENANCE MANY WTE FACILITIES NEED TO INVEST SIGNIFICANT CAPITAL TO EXTEND ITS USEFUL LIFE ANOTHER 25 YEARS

WASTEC, Wilmington, NC Jackson County RRF, Jackson, MI Wheelabrator Claremont, Claremont, NH Red Wing Plant, Red Wing, MN MERC, Biddeford, ME Harford WTEF, Joppa, MD Wallingford RRF, Wallingford, CT

Since 2010, 7 facilities totaling almost

2,500 TPD of capacity have closed

WTE FACILITY SHUTDOWNS Harford Waste to Energy Facility Joppa, MD

Maine Energy Recovery Company Biddeford, ME

Components at End of Useful Life

Improve Aesthetics

Reduce O&M Costs Increase Revenues/Gain Additional

Revenue Streams

Comply with Future Emissions Requirements

CAPITAL PROJECT DRIVERS

Harford Waste to Energy Facility Joppa, MD

Maine Energy Recovery Company Biddeford, ME

TYPICAL SECTIONS OF A WTE FACILITY

FEED HOPPER & CHUTE

FEED TABLE & GRATES

ASH DISCHARGERS

BOILER WATERWALL TUBES

SUPERHEATER TUBES

SUPERHEATER TUBES

ECONOMIZER TUBES

TYPICAL SECTIONS OF A WTE FACILITY

SCRUBBER VESSEL

SCRUBBER VESSEL

SCRUBBER HOPPER

BAGHOUSE DUCTWORK

BAGHOUSE HOPPERS

BAGHOUSE ROOF

MSW HANDLING o Cranes o Grapples o Front End Processing Equipment (for RDF plants)

FURNACE o Feed Chute o Feed Table o Grate Runs o Ash Transition Chute o Ash Discharger

BOILER o Waterwall Tube Panels o Boiler Screen Tubes o Gen Bank/Economizer Bundles o Air Preheater Tube Bundles o Superheater Screen Tubes o Superheater Tube Pendants Bundles o Sootblower System o Auxiliary Burners o CO tuning/Optimization o Insulation & Lagging

APC o Flue Gas Ductwork o Scrubber Refurbishment o Baghouse Refurbishment o De-NOx/Low NOx System o Carbon Injection System o Lime Injection System o Ammonia Injection System

ASH HANDLING o Bottom Ash Vibrating Pan Conveyor o Ferrous Drum/belt Magnets o Eddy Current Separators o Belt Conveyors o Screw Conveyors o Pugmills

SITE CIVIL/ARCHITECTURAL o Receiving Floor Repairs o Receiving Pit Wall Repairs o Ash Building Floor Repairs o Ash Building Bunker Repairs o Landscaping/Repaving Work o General Building Repairs (roof/siding/painting)

BOP o High Pressure Feedwater/Steam Piping Audit/Repairs o Boiler Feedwater Pumps o Condenser Retubing o Chemical Feed System Upgrades o Closed Loop Cooling Water o Cooling Tower/Air Cooled Condenser Refurb o CEMS System Upgrades o DCS System Upgrades o Air Compressors o Turbine-Generator System o Stack o Misc Pumps & Fans

MISCELLANEOUS o Electrical Power Systems o Plant Piping & Hanger Supports o Rolling Stock o Truck Scales o Fire Protection o HVAC

CAPITAL REFURBISHMENT PROJECTS

CAPITAL REFURBISHMENT PROJECTS

Cost of refurbishment projects highly variable

Some end of term projects we are seeing most frequently: New Cranes/Grapples Ash Discharger Replacement Boiler Waterwall Panel Replacement Generator Bank Tube Replacement Economizer Bank Tube Replacement Sootblower System Upgrades

APC Flue Gas Ductwork Replacement Scrubber Rebuild Baghouse Rebuild/replacement New Truck Scales Cooling Tower Rebuild New T/G Controls

Traditional Overlay Material o Carbon Steel o Inconel 625 Super Alloys to Consider o Eutectic 3606/1433D/BTC511 o Colmonoy 88 o Conforma Clad

Areas of Application o Boiler waterwall tubes o Superheater tubes

BOILER TUBE OVERLAYS

Kennametal (www.kennametal.com) WallColmonoy (www.wallcolmonoy.com) Applied Thermal Coatings (www.appliedthermalcoatingsusa.com) Liquidmetal Coatings, LLC (www.liquidmetal-coatings.com) Joining Technologies (www.joiningtech.com) Whertec (www.castolin.com/whertec) Integrated Global Services, Inc. (www.integratedglobal.com) SprayWerx (www.spraywerx.com) AmStar (division of Alstom) (www.alstom.com) Dai-ichi High Frequency Co., Ltd. (www.dhf.co.jp/eng) Magellanmetals (www.magellanmetals.com)

ALTERNATIVE MATERIALS MANUFACTURERS & INSTALLERS

Traditional Material o Carbon Steel o 316L Stainless Steel Super Alloy to Consider o Hastelloy C-22

Areas of Application o Scrubber vessel lining o Scrubber hoppers

SCRUBBER VESSEL & HOPPER LINING

Traditional Installation Materials o Mineral wool or Roxul Insulation o Protective Lagging

Areas for application o Scrubber outlet duct/baghouse inlet duct o Scrubber and baghouse hoppers o Screw conveyors

SPRAY ON INSULATION

SPRAY ON INSULATION

SPRAY ON INSULATION

FACILITY ENHANCEMENTS

• Metals Recovery • Non-ferrous • Additional ferrous for RDF plants

• VFDS • ACC fans • ID/FD fans

• Semi Dry Ash System

• Enhanced Nox Reduction • Enhanced SNCR/SCR • Covanta’s LN NOx

Flue Gas Recirculation

© 2015 HDR, Inc., all rights reserved.

THANK YOU. QUESTION & COMMENTS Jeff Martirano, P.E. jeffrey.martirano@hdrinc.com 914-993-2038 Solid Waste Project Engineer/Manager