fl
Unit 11
Richmond Hill, Ontario
Canada
L4BDrive
3N4
121 Granton
DECOMMISSIONING CONSULTING SERVICES LIMITED
49943-1
Tel: (905)882-5984
Fax: (905) 882-8962
E-mail: engineers@dcsltd.ca
Web Site: http://www.dcsltd.ca
23 December 2009
Toronto Hydro Energy Services Inc.
10 Belfield Road
Toronto, Ontario
M9W 1GI
Attention:
Ms. Suzanne Yelles, P.Eng.
Senior Manager, Generation
Re:
Decommissioning Plan Report
Proposal Renewable Energy Plant
7 Leslie Street
Toronto, Ontario
Dear Ms. Yelles:
Decommissioning Consulting Services Limited (DCS) has reviewed the conceptual design plan
for the proposed renewable energy plant to be constmcted on the 7 Leslie Street property. As
requested, we provide below the key measures which will need to be carried out in the future
when it is necessary to decommission the facility.
PROCEDURES FOR DISMANTLING OR DEMOLISHING THE FACILI’rY
1.
Review of all applicable regulations, guidelines, standards, bylaws etc. applicable at the
time of the proposed facility decommissioning to ensure all work is carried out in
accordance with these requirements.
2.
Completion of a Designated Substances Survey (DSS) and hazardous materials survey
(or equivalent) to ensure all facility decommissioning bidders, contractors and ultimately
demolition workers are advised of potential environmental/health hazards; if any.
3.
Development and implementation of a plan to decontaminate any process equipment
including engine generators, process piping, exhaust stacks, transformer cooling oil
systems, etc. and dispose of collected wastes off site.
4.
Permanent blanking off and removal of methane gas supply from Ashbridges Bay
Treatment Plan to energy facility, beyond the property boundary.
Specialists in Property Assessments and Environmental Audits, Site Remediation and Decommissioning,
Geotechnical Engineering, Hydrogeology, Waste and Wastewater Management and Industrial Hygiene
49943-I
Toronto Hydro Energy Services Inc.
23 December 2009
Page 2
5.
Disconnection and decommissioning of all above ground and below ground utilities
unless specifically required for future use.
6.
Removal of facility exhaust stacks, including removal of chimney lining material, in
accordance with applicable regulations.
7.
Demolition of renewable energy plant building in manner which minimizes dust
migration and impact on sunounding lands and adjacent property users. Demolition
procedures should optimize material for reuse and recycling and minimize waste
generated.
8.
If not required for future reuse, removal of building foundation pile caps, and upper
portions of driven pile foundations to at least 1.5 m below proposed grade following
decommissioning of the plant.
RESTORATION OF LAND OR WATER NEGATIVELY AFFECTED BY FACILITY
1.
Prior to facility decommissioning completion of a Phase I Environmental Site
Assessment (ESA), Post Lease Environmental Audit or equivalent to identi& any
potential areas of subsurface environmental impact within the site.
2.
Completion of a subsurface environmental investigation (Phase II ESA), if required, to
investigation and delineate any subsurface environmental impacts resulting from past
operation of the facility.
3.
Preparation and implementation of a soil and groundwater remediation plan.
4.
Completion of environmental verification sampling and monitoring, by a qualified
person (QP) as recognized by the MOE, or equivalent, to confirm site is satisfactorily
remediated to applicable standards.
PROCEDURES TO MANAGE EXCESS MATERIALS AND WASTE
1.
Completion of an audit of the building materials and equipment present in the plant prior
to decommissioning.
2.
Identification of equipment/materials suitable for reuse and/or recycling.
3.
Development and implementation of a reuse and recycling plan throughout the course of
the facility decommissioning program.
net
49943-1
Toronto Hydro Energy Services Inc.
23 December 2009
Page 3
4.
Identification of waste materials to be generated during the decommissioning program
and determination of suitable sites/facilities for the disposal of these wastes in
accordance with applicable regulations, standards and guidelines.
We trust the key items identified in this facility decommissioning plan are satisfactory. Please
do not hesitate to call should you have any questions or if we may be of further assistance.
Yours very truly,
DECOMu ISSIONING CONSULTING SERVICES LIMITED
I
chard W. Browne, M.A.Sc., P.Eng.
Senior Vice President
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