Presentation to

www.essgroup.com

June 25, 2008

Northeast States-EPA WorkshopSiting Renewable Energy Projects

at Closed Solid Waste Landfills and Contaminated Sites

EngineersScientistsConsultants

HULL WIND IIA FRESH BREEZE OFF THE LANDFILL

HULL WIND II

• BACKGROUND: History of Success – Hull Wind I Municipal Lighting Plant – Local Knowledge and Expertise Town Land For Reuse Community Support

HULL WIND II

• Hull Sanitary Landfill Siting Considerations: Available open space Proximity to system interconnection Prevailing wind conditions

• Regulatory Siting Considerations: Constructing large structures on closed landfills

• Maintaining liner integrity• Maintaining cap integrity• Ongoing maintenance and monitoring

HULL WIND II

• Landfill Conditions – Three Sections: Phase 1A – closed, unlined landfill cell, capped with low

permeability (clay) cap Phase 1B – closed, unlined landfill cell, capped with flexible

membrane liner (FML) cap• Location for WTG Installation

Phase 2 – lined landfill cell, active, operating area of the landfill• Locations for supporting structures; poles, ductbank

HULL WIND II

• Project Specifications (Phase IB)- Disruption of 5,000 s.f. of existing landfill cap for WTG: Removal of existing membrane and covering soils Placement of a pile foundation Placement of a 20’ square concrete pad over the piles to

support WTG Replacement of existing FML within disturbed area with 40 mil

HDPE membrane welded to existing membrane to restore cap integrity

Cover with 12” of drainage sand and 6” of vegetative support soil (loam)

HULL WIND II

• Project specifications (Phase 2): Utility poles (2) placement supporting overhead transmission

lines for interconnection Waste depth at pole locations in excess of 20’ Poles set at 6.5 ft. BGS to maintain liner Placement of underground duct bank from WTG to switch gear

to new overhead power line Bottom of duct bank approx. 30” BGS to maintain liner

HULL WIND II

• Costs and Benefits: $ 3,000,000 construction cost $ 31,000 annual maintenance and insurance cost Value of electricity approx. $0.10/kWh which would otherwise

be purchased to respond to Hull demand

HULL WIND II

• Since June 22, 2006 (date of commission):

7,767,600 kWhs generated (23.3% capacity) $ 776,760 avoided energy costs $1,800,000 received for RECs

No emissions No fuel spills No unscheduled outages

HULL WIND II - BEFORE

HULL WIND II - AFTER

HULL WIND II• All Images Courtesy of Citizens for Alternative Renewable

Energy• www.hullwind.org