Southgate Anaerobic Digester Project

Petawawa Biofuel LP

November 7th 2018

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PROJECT AND SITE OVERVIEW

Review of the proposed project and site location

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Site Location

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Facility Layout

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Process Flow Diagram

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DESIGN UPDATES

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Three Design Changes forIncreased Odour Protection

1. Manure reception within Reception Building

2. Digestate tank loading within Reception

Building (Sept 2018)

• Simplified washdown of trucks

• Simplified spill containment

• Digestate virtually odourless

3. Updated design of odour control stacks for

increased redundancy and odour protection

(Sept 2018)

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Updated Odour Control Stack Design

• Design features that remain:

– All displaced air is treated through an activated

carbon filter system before it is released to the

atmosphere

– Air tight tanks - reception, storage and AD

– No open storage of obnoxious materials

– Daily inspection of facility

– Delivery truck wash-down in enclosed building

– Good housekeeping – keeping site clean

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Updated Odour Control Stack Design

• Design features that have changed:

– Multiple continuous emissions monitoring (CEM)

sensors for each stack

– Two carbon filters run in series both sized

complete full treatment of air

– SCADA system to automatically direct flow to

second filter should breakthrough occur

– Continuous air treatment during media change out

(design anticipates 1 media change per year)

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Updated Odour Control Stack Design

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Pre-treatment and Carbon Filter

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“Mist eliminator”

Carbon Filter

CLARIFICATION OF OUTSTANDING ISSUES

ODOUR ASSESSMENT &

UPDATED EMISSION SUMMARY AND DISPERSION MODEL

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Odour Assessment

• Odour Assessment carried out on all 7 odour control stacks at the facility– Odour control at receiving area (6 stacks)

– Odour control at biogas upgrader (1 stack)

• Dispersion modelling of odour from each stack is compared to MECP threshold of 1 odour unit (OU)

• Dispersion model results indicate that odour emissions are a factor of 10 below MECP limit

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Odour AssessmentDispersion Modelling of Odours

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Data used for odour assessment is from 2018 site emissions testing from similar AD facility in BC

Odour AssessmentOdour Dispersion Modelling

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Odour AssessmentOdour Dispersion Modelling Results

Point of Impingement OU

A 0.0481

B 0.0636

C 0.0823

D 0.0701

E 0.0636

F 0.0595

G 0.0459

H 0.0728

• Dispersion model results much lower than MECP threshold of 1 Odour Unit

• Dispersion model is a conservative screening method (“worst case”)

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Emissions Summary andDispersion Modelling

• Updates made to ESDM Report

– Some stack heights increased

– Effect of buildings included in modelling

– NOx modelling instead of NO2 modelling

• Result

– Negligible impact to emissions from the facility

– Emissions remain below MECP Guidelines

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Responses to Concerns Raised During Zoning Amendment Process

Review of Concerns Raised & Responses to Concerns

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Summary of Concerns Raised1.Daytime meeting not appropriate (regarding the June 27 Public Meeting)

2. Fugitive Odours from the Eco-Park 'nothing being done'; 'MOE does nothing'

3. Daytime meeting not advertised properly.

4. Location is too close to school and new subdivisions

5. The existing problems of fugitive emissions are not being addressed and this project will not improve the situation.

6. Odour concerns from Lystek and Go Bark

7. Confusion regarding the type of odour filtration - biofilter vs. activated carbon

8. Perception that the project is the same as the Elmira system

9. GHD review based on the technical information - recommended additional information

10. Backup sensors and secondary filters

11. Road Use, development agreement to be registered on title to include: site plan, citizen's advisory committee, road use, royalty payments, etc.

12. Information to be properly presented to public

13. Lame Duck Decision - prudency to defer

14. Planning Justification inadequately addressed PPS

15. Township to take 'every precaution' to ensure 'no negative effect on air quality'

16. Option A vs. Option B vs. Option C

17. Concerns at All Candidates Meetings - 'no more biosolids'; 'computer engineering people'; insufficient employment'

18. Concerns expressed at Open Houses 'lack of transparency'

19. Property Values in Dundalk are suppressed because of the industries in the Eco-Park

20. Project not viable if gas not sold

21. MOECP concerns

22. GHD Concerns

23. First Nations and Aboriginal Concerns

23. Adjacent Landowner Concerns 19

Any Additional Questions?

Mark BellDirector

Petawawa Biofuel LP

Mark Bell mbell@petawawacorp.com

Tel: 416 209 7351

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Odour Appendix

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What is Odour?

• The magnitude of odour impact depends on a number of factors

– Frequency of detection

– Intensity as perceived

– Duration of exposure

– Offensiveness

– Receptor sensitivity

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What is Odour?

• Odours may be perceived as pleasant or unpleasant.

• Main concern with odours is the its ability to cause a response in individuals that is considered to be objectionable or offensive

• Odour emission thresholds set are different around the world (often industry dependent)

– Ie: coffee roaster facility could have a higher emission threshold than a waste water treatment plant

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How Do You Measure Odour?

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• Dynamic dilution olfactometer which controls flow and dilution rate of sample to an air panel

• Begin with high dilution value which is decreased (machine controls flow and dilution rates)

• Register response to odour (smell or not)

How Do You Measure Odour (cont)?

• Processing results, the perception threshold (equal to 1 odor unit per cubic meter) is the point at which 50% of the panelists cannot smell the odor but 50% can

• The perception threshold is used to calculate the odour units the sample has without dilution

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