C h i n o o k P o w e r S t a t i o n P r o j e c t C o m b i n e d C y c l e G a s F a c i l i t y

C a n t u a r , S a s k a t c h e w a n O c t o b e r 1 3 , 2 0 1 6

PROJECT NEED

• SaskPower requires additional generation to: • meet the growing demand for power in the province of

Saskatchewan; • support the integration of intermittent renewable

generation (wind & solar); and • provide replacement power for the retirement and/or

refurbishment of conventional coal-fired generating units.

• The Chinook Power Station is a 350 megawatt (MW) combined cycle natural gas generating facility to be constructed in the R.M. of Swift Current, Saskatchewan. The plant will be capable of powering a city the size of Saskatoon.

SITE SELECTION PROCESS

• Site Selection Process began in 2012 to determine potential sites for new natural gas generation.

• The selection of the location for the Chinook Power Station was based on: • Availability and cost of the fuel supply infrastructure; • Availability and cost of connecting to the transmission

grid; • Constructability within the area of the site; • Accessibility to the site location; and • Expansion of renewables.

CHINOOK POWER STATION LOCATION

Newalta Industrial Landfill Chinook Power Station

HEALTH, SAFETY & ENVIRONMENT

As important as anything we do and a part of

everything we do. SaskPower is committed to the protection of the environment and the health, safety and well-being of its employees, contractors and everyone exposed to our facilities. We are all responsible for protecting the health and safety of the environment, ourselves and others.

Burns & McDonnell integrates a Safety & Health Program into project process that requires pre-planning of work activities to guide implementation of safe work measures. Zero recordable incidents is always a project goal.

T E C H N I C A L D E TA I L S

ADVANTAGES OF COMBINED CYCLE NATURAL GAS GENERATION

• Lower greenhouse gas (GHG) emissions and nitrogen oxide (NOx) emissions per MW output compared to less efficient single cycle gas turbines.

• Natural gas is used more efficiently when used in a combined cycle application.

• Provides reliable power in the area and expansion of renewables.

• Serves growing industry need within the area. • Decreases line losses on the transmission system

benefitting customers and the environment.

TYPICAL COMBINED CYCLE NATURAL GAS FACILITY DIAGRAM

WATER REQUIREMENTS

• The Chinook Power Station requires a dedicated water supply to ensure there is no disruption to generation.

• Different water sources were investigated during the design of the Chinook Power Station including: - Groundwater - South Saskatchewan River water - Effluent city water - Treated city water

• Selection of the water option is based on: - Water availability - Reducing & recycling water - Economics - Reliability - Minimize treatment - Reducing waste water discharge

WATER USE

• The Chinook Power Station will purchase treated water from the City of Swift Current. The decision was based on minimizing water use, minimizing water treatment and economics. Water must be very clean for the heating process to reduce scaling.

• SaskPower will construct, and the City of Swift Current will own and operate, a water line that will be capable of supplying 350 litres per minute to a site water storage tank. It is expected 66 litres per minute will be required for full load operation. Approximately 65% of the process water will be recycled.

• Water not clean enough for the process will go to the evaporation pond. No water is returned to the City.

SITE LAYOUT

COMBINED CYCLE NATURAL GAS FACILITY EXAMPLE

North Battleford Generating Station 260 MW Combined Cycle Power Plant, 2013

CHINOOK GENERAL ARRANGEMENT

E N V I R O N M E N T

ENVIRONMENTAL REVIEW PROCESS

• Environmental screening of the project is conducted by both the Saskatchewan Ministry of Environment-Environmental Assessment Branch (MOE) and the Canadian Environmental Assessment Agency (CEAA) to determine if an environmental assessment (EA) is required.

• SaskPower has prepared and submitted a Technical Proposal to MOE and a Project Description to CEAA for environmental screening.

• Ministerial determination as to whether an EA is required from both the provincial and federal government is expected by November 2016.

ENVIRONMENTAL SURVEYS

• SaskPower undertook desktop analysis and field surveys to understand the current environmental conditions and potential environmental effects

• Desktop analysis included: environmental screening using existing databases, aerial imagery and literature, noise assessment and air dispersion modelling

• Field Surveys included: • Pre-disturbance site assessment – soil, vegetation, land use, wildlife • Sharp-tailed grouse lek surveys • Vegetation surveys – rare plants and weeds • Bird surveys – breeding birds, rare birds • Wetland surveys • Amphibian surveys • Ground-truthing the proposed waterline options

ENVIRONMENTAL SURVEY RESULTS

• Facility location dominated by tame pasture

• 95 plants observed

• No rare or sensitive plants

observed

• No prohibited weeds observed

• Four noxious weeds observed

• No wetlands in facility footprint

ENVIRONMENTAL SURVEY RESULTS

• Northern leopard frog observed • Sharp tailed grouse lek

• 20 bird species detected

• Two Species of Management

Concern: • Baird’s sparrow • Bobolink

• No Burrowing owls detected

ENVIRONMENTAL EFFECTS MITIGATION

• Environmental design measures have been implemented into Project planning in several ways, including during Project siting and the selection of Project components and activities in order to reduce or avoid potential effects to the environment.

• Environmental monitors will work collaboratively with SaskPower and Project personnel to identify and address environmental issues and confirm compliance with specific regulatory requirements during construction.

• Post-construction monitoring will be carried out to confirm that reclamation, weed control or other implemented mitigation measures requiring monitoring are successful.

• Air emissions will be monitored through the Continuous Emissions

Monitoring System (CEMS) and reported on a regular basis to SK MOE

C O N S T R U C T I O N

SELECTING OUR ENGINEER, PROCURE AND CONSTRUCT (EPC) PARTNER

• In the summer of 2015, SaskPower issued a request for proposal of EPC to assist with the project. Through a competitive evaluation, Burns & McDonnell Canada was selected as SaskPower’s EPC partner.

• Burns & McDonnell Canada was selected because of: • Project Experience & Reputation

• Queen Elizabeth Power Station (Saskatoon, SK) ‘D’ Plant Expansion

• TransCanada Halton Hills (Halton Hills, ON) 670MW Combined Cycle Plant EPC

• Project Team & Execution Strategy • Safety Performance – Top 1% Safety Ranking • Design – Rated top 5% of the Top 500 Design Firms • Industry Leader

CONSTRUCTION SCHEDULE

EMPLOYMENT

• Watch our Website www.saskpower.com/chinook to keep up to date on which companies have been awarded contracts for construction services.

• After construction, approximately 20 staff will be employed to operate the facility.

• Maintenance and other service contracts will be required during operations as well.

DURING CONSTRUCTION

Noise • Plan to enclose the building by end of 2017 to minimize noise and weather

impacts Road Maintenance • SaskPower will be responsible for road maintenance of Township Road 162 to the

Chinook project site during construction Dust • Water truck will be used to reduce dust Traffic • Workers and deliveries will travel to site via Highway 32 to Township Road 162

Temporary Lighting • Temporary light poles will be installed in the construction parking and equipment

laydown areas during construction for safe personnel traffic and for site security.

N O I S E A N D A I R M O D E L S

NOISE

• The Chinook Power Station will meet design goal of 40 dBA at distance of 1.5 km.

• Noise levels at this distance will be determined using predictive noise modeling, based on ISO 9613.

• Mitigation measures will be implemented as needed.

MAJOR NOISE SOURCES IN PREDICTIVE MODELING

TYPICAL MITIGATION MEASURES

PROJECTED OPERATION NOISE LEVELS

PROJECTED OPERATION NOISE LEVELS

NOISE MITIGATION TECHNIQUES

Equipment specification – Most equipment is specified to meet 85 dBA at 3 feet. More stringent requirements can be imposed on the equipment suppliers if necessary to meet the standard. Equipment location – The location of equipment on the site or within buildings or enclosures can help limit noise levels at site boundaries.

NOISE MITIGATION TECHNIQUES (con’t )

Buildings – The majority of the noise sources will be located within a building (i.e. gas turbine generator, steam turbine generator, pumps). Silencers – Silencers can be included in the plant design to further limit noise levels. Silencers are commonly specified for the stack, gas turbine air intake, as well as steam vents.

AIR DISPERSION MODELING

• Air dispersion modeling was performed for the Chinook

Power Station to determine compliance with Saskatchewan Ambient Air Quality Standards (SAAQS).

AIR DISPERSION MODEL

• Emissions of air contaminants were included in the model for the following Chinook Power Station sources:

• Combined cycle combustion turbine

• Emergency diesel generator

• Emergency diesel fire pump

• Dew point heater

CHINOOK POWER STATION POTENTIAL EMISSIONS

10 KM X 10 KM RECEPTOR GRID & ELEVATION MAP

UTM Easting (m)

UTM

Nor

thin

g (m

)

280000 282000 284000 286000 288000 290000 292000 294000 296000 298000 300000 3020005570000

5572000

5574000

5576000

5578000

5580000

5582000

5584000

5586000

5588000

5590000

5592000

715

725

735

745

755

765

775

785

795

805

815

825

835

845

AIR DISPERSION MODELING

What is an Air Dispersion Model?

• Air dispersion modeling is the mathematical simulation of how air pollutants disperse in the ambient atmosphere from emission sources.

Air Dispersion Model Used for Chinook

• Latest version of AERMOD was used for the air quality analysis.

• It is an AMS/EPA Regulatory Model (AMS/EPA: American Meteorological Society/Environmental Protection Agency).

• This model is recommended by the Saskatchewan Ministry of Environment.

INPUTS/OUTPUTS OF AN AIR DISPERSION MODEL

• Inputs: Emission sources, buildings, meteorological data, geophysical data (terrain and surface roughness), and user-defined receptor grid.

• Outputs: Maximum air impacts at a single receptor for a specific time and pollutant averaging period (e.g. hourly and annually).

AIR DISPERSION MODEL – STUDY SCOPE

• Study period: Meteorological data years 2003 to 2007

• Study area: 50 kilometers from fence line boundary.

• Receptor Grid: 4 levels; denser grid closer to the plant.

• Maximum pollutant impacts at every receptor are predicted with the air dispersion model.

• The Saskatchewan Air Quality Modelling Guideline was used to conduct the modelling.

MODELLED IMPACTS

• Saskatchewan Ambient Air Quality Standards (SAAQS) established so risk to human health and ecosystem health are minimized.

• The modelled impacts include ambient background concentrations, which is the portion of ambient concentration due to natural and nearby sources. These concentrations were provided by the Saskatchewan Ministry of Environment.

• The modelled results represent the maximum impact at a single receptor for a specific time and averaging period.

MODELLED IMPACTS

0

10

20

30

40

50

60

70

80

90

100

CO1-hour

CO8-hour

NO21-hour

NO224-hour

NO2Annual

SO21-hour

SO224-hour

SO2Annual

PM2.524-hour

PM2.5Annual

PM1024-hour

PM24-hour

PMAnnual

Per

cen

t (%

)

Chinook Power Station Modelled Impacts Existing Ambient Air (Background)

Saskatchewan Ambient Air Quality Standard Threshold

S U P P O R T I N G I N F R A S T R U C T U R E

TRANSMISSION LINE ROUTE

WATER LINE ROUTE OPTIONS

NATURAL GAS LINE ROUTE

• A natural gas supply to the facility will be required and TransGas will be responsible for routing, constructing and operating the gas pipeline infrastructure.

Q u e s t i o n s & D i s c u s s i o n