350977 Design and Operations Report 1 Arcadis Canada Inc. (formerly SENES Consultants)

DESIGN AND OPERATIONS PLAN REPORT TORONTO HYDRO ENERGY SERVICES INC.

ASHBRIDGES BAY BIOGAS COGENERATION PLANT Toronto Hydro Energy Services Inc. (TH Energy) is planning to construct and operate a Biogas Cogeneration Plant located at 7 Leslie Street, Toronto, Ontario (the Site), which is adjacent to the Ashbridges Bay Treatment Plant (ABTP). The Biogas Cogeneration Plant (Cogeneration Plant) is subject to the requirements of the new Green Energy Act and Renewable Energy Approvals (REA) process (O.Reg. 359/09). TH Energy has entered into a long term “Agreement to Lease” with the City of Toronto for the site location, which is currently used as a works yard. Part of the property located at 7 Leslie Street will be used to build the Cogeneration Plant, while the remainder of the land will continue to be used as a works yard by the City of Toronto. This Design and Operations Report is organized into the following sections:

1. Project Description 2. Site Plan 3. Facility Design and Operations Plan 4. Environmental Effects Monitoring Plan 5. Communications and Emergency Response Plan

 

1. Project Description

The proposed TH Energy Cogeneration Plant is classified under O.Reg. 359/09 as a Biogas Facility, and will utilize biogas produced in existing digesters at the ABTP to generate electricity and thermal energy in the form of hot water TH Energy is considering two (2) different configurations for the site: the Cogeneration Plant will generate either 9.912 MW of electricity from seven (7) reciprocating engine generators, rated at 1.416 MW each, or 9.845 MW of electricity from five (5) reciprocating engine generators, rated at 1.969 MW each, under the next phase of the Independent Electricity System Operator (IESO) Process and Systems Upgrade Initiative (PSUI) as part of the SaveOnEnergy program. Electrical connection is through the ABTP electrical distribution system, therefore, the electricity produced by the Facility will be consumed by the ABTP. Process inputs to the Cogeneration Plant include biogas and process water from ABTP; outputs include hot water to ABTP, electricity to ABTP via a step-up transformer, engine generator exhaust (typical combustion emissions consisting primarily of carbon dioxide, carbon monoxide, nitrogen oxides, suspended particulate and sulphur oxides), relatively small quantities of sewage material removed from the biogas stream (to be potentially flared), typical coolants and lubricants consumed during engine generator operations and various packaging materials.

350977 Design and Operations Report 2 Arcadis Canada Inc. (formerly SENES Consultants)

2. Site Plan

The area surrounding the proposed Cogeneration Plant is mainly industrial land use, with some nearby recreation areas (i.e., public parks, boat club). The nearest residential receptors are north of Lakeshore Boulevard East, approximately 800 m north of the Site. Figure 1 depicts the site location and vicinity.

FIGURE 1 SITE LOCATION

 

Site plan drawings depicting the site layout and building plans are attached. The ‘Site Servicing Plan’ drawing outlines the proposed enclosure locations, one (1) for each engine generator and another for electrical switch gear. The Site will be surrounded by fencing with a gated entrance road off the existing South Road, which provides access to the ABTP site. Other utility connections outlined in the Site Plans are as follows:

A transformer pad will be located at the northeast corner of the Site, which will connect electricity generated at the Cogeneration Plant to the main ABTP electrical distribution system via underground duct bank.

Underground piping for digester gas arriving from the ABTP connects to each individual engine generator enclosure.

Hot water piping for ABTP processes and cold water return will be located in the same trench as digester gas piping. The existing approved ABTP process water treatment

Ashbridges Bay 

Treatment Plant 

Proposed Location of 

ABTP Biogas 

Cogeneration Plant 

350977 Design and Operations Report 3 Arcadis Canada Inc. (formerly SENES Consultants)

process will continue to operate. There will be no treatment or disposal of process water at the Cogeneration Plant site; any required disposal of process wastes will be off site.

Water supply for the Cogeneration Plant will be for an outdoor tap and emergency eye wash station, and is provided via galvanized piping from the water main located on Leslie Street.

Small amounts of condensate removed from digester gas will be discharged back to the sewer system via sanitary discharge.

All drawings provided outline the location for the engine generator set enclosures and exhaust stacks. Digester gas arriving at the site will pass through a treatment system, which may require periodic flaring, depending on the final equipment design. If required, a 5 m or 6 m tall flare would be located on the eastern property line at a location to be determined.

The Cogeneration Plant building will include a separate enclosure for electrical switch gear equipment.  The enclosure elevations are depicted in Figure 2.

As outlined in the Odour Report prepared under the REA process, biogas will be contained within welded piping prior to combustion within the engine generators. Therefore, there are no odour emissions anticipated from the proposed Cogeneration Plant.

As outlined in the Acoustic Assessment Report prepared under the REA process, the nearest sensitive noise receptor is located approximately 800 m north of the site. Therefore, there are no noise receptors that will be negatively affected by the operation of the Cogeneration Plant.

FIGURE 2 ENCLOSURE ELEVATIONS

350977 Design and Operations Report 4 Arcadis Canada Inc. (formerly SENES Consultants)

3. Facility Design and Operations Plan

The proposed TH Energy Cogeneration Plant will utilize biogas produced in existing digesters at the ABTP to generate electricity and thermal energy in the form of hot water. The biogas is produced by anaerobic digestion of the biodegradable material in municipal sewage waste at the ABTP facility, and is comprised primarily of methane and carbon dioxide. Currently, the biogas is used as fuel to heat water in existing boilers at the ABTP. TH Energy is considering two (2) different configurations for the site: the Cogeneration Plant will generate either 9.912 MW or 9.845 MW of electricity under the next phase of the Independent Electricity System Operator (IESO) Process and Systems Upgrade Initiative (PSUI) as part of the SaveOnEnergy program. Electrical connection is through the ABTP electrical distribution system, therefore, the electricity produced by the Facility will be consumed by the ABTP. Heat resulting from the biogas combustion process in the engine generator sets is recovered from engine cooling, lube oil cooling and from the exhaust flue gases by heat exchangers, which produce the hot water for use at the ABTP. Biogas pipes leading to and hot water pipes leading from the TH Energy Facility will be installed across a shared property line. Maintenance of equipment will occur on regular intervals. General maintenance such as lube oil replacement on the gas fuelled engine generators will take place every 2,000 hours, while a major overhaul of the reciprocating engines will take place every 60,000 hours. Other routine inspections will also be performed on a regular basis.

FIGURE 2 PROCESS FLOW DIAGRAM

POWER TO ABTP  

 

THERMAL ENERGY (HOT WATER) TO 

ASHBRIDGES BAY TREATMENT PLANT 

LEGEND: 

BIOGAS 

POWER 

EXHAUST GASES 

HOT WATER 

BIOGAS‐FIRED GENERATOR 

BIOGAS SUPPLY  

FROM ABTP 

BIOGAS TREATMENT

HEAT RECOVERY UNIT 

DISCHARGE TO 

ATMOSPHERE FLARED TO  

ATMOSPHERE  

350977 Design and Operations Report 5 Arcadis Canada Inc. (formerly SENES Consultants)

The proposed TH Energy Cogeneration Plant is designed to minimize impacts on the environment. The Site is located near to the Tommy Thompson Park, which is a significant bird nesting area, migration and stop-over and reserve. The enclosures are not reflective, therefore, bird impacts are not expected. Any sewage (less than ½ m3/week of sewage material may be removed from the biogas stream) or waste materials generated during operations (typical coolants and lubricants consumed during engine generator operations) will be stored in site enclosures, and will be disposed of through licensed haulers. The Site will be registered as a hazardous waste generator with reporting completed through the Ministry of Environment Hazardous Waste Information Network (HWIN). Any non-hazardous waste generated at the Site (various packaging materials and office type waste) will be collected in garbage bins located inside enclosures and disposed of by a contracted company. Storm water runoff at the Site currently collects in a storm water sewer located on Leslie St. at the southwest corner of the Site. Four new storm sewers will be installed at the Site as outlined on the Storm Drainage Plan drawing. 4. Environmental Effects Monitoring Plan

Environmental effects from the operation of the proposed Cogeneration Plant have been mitigated to ensure minimal impacts on the surrounding environment. Air and noise emissions will comply with applicable environmental regulations and site specific testing of equipment will be completed. Source testing of engine generator set exhaust emissions will be completed to ensure compliance with O.Reg. 419/05 requirements. An acoustic audit will be completed to ensure any noise emissions from site building entry and exit points are mitigated with sound attenuation equipment as required to meet NPC 205, 232 and 233 documents under Section 9 of the EPA. All applicable environmental regulations will be followed in the disposal of any wastes generated at the site. Regular meetings will be conducted with the existing Neighbourhood Liaison Committee (NLC) developed to facilitate communication regarding operations at the adjacent ABTP.

350977 Design and Operations Report 6 Arcadis Canada Inc. (formerly SENES Consultants)

5. Communications and Emergency Response Plan

A plaque describing the Cogeneration Plant will be placed on the outside front lawn area of the Site. Regular local community meetings with the existing Neighbourhood Liaison Committee (NLC) are currently (and will continue to be) held. These meetings include a discussion of operations at the adjacent ABTP and future operations of the proposed Cogeneration Plant. The Cogeneration Plant site will not be occupied. Emergency contact information will be located at the ABTP Guard House location immediately adjacent to the Site. During a biogas outage (i.e., under emergency conditions only) the engine generator sets will operate using natural gas only, and deliver power to ABTP to allow the plant to continue to operate as required. A project file will be kept at Toronto Hydro offices. Once the facility is operational, a log book including equipment operating conditions will be kept at the Cogeneration Plant. Emergencies will be communicated through public media as required.

ATTACHMENTS

SITE PLAN DRAWINGS

Drawing – A0.2 Site Plan Drawing – L101 Layout Plan Drawing – L102 Planting Plan Drawing – Storm Drainage Plan Drawing – Sedimentation and Erosion Control Plan Drawing – Site Grading Plan Drawing – Site Servicing Plan

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(SEE LESLIE STREET GREENING

PHASE 2 DRAWINGS FOR DETAILS)

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(SEE SITE PLAN)

13mm Ø DOWELS

450mm LONG ACROSS

13mm EXPANSION JOINTS

@ 5485mm O.C.

ONE END OF DOWEL

SHALL BE LUBRICATED

WITH A RELEASING AGENT.

NEW POURED

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(SEE SITE PLAN

FOR EXTENT)

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13mm EXPANSION JOINTS

@ 5485mm O.C.

ONE END OF DOWEL

SHALL BE LUBRICATED

WITH A RELEASING AGENT.

POURED PATTERNED

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DRAWING No.:

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PROJECT NUMBER: 27143

DATE: SEPT. 5, 2014

Revision DescriptionNo Date Int.

SITE PLAN

TORONTO HYDROENERGY SERVICES

DRAWN BY CHECKED BY

KEY PLAN

M.P. A.B.

GENERAL NOTES1. The contractor shall rectify all disturbed areas to

original condition.

2. Standard drawings of the City of Toronto constitute

part of the plans of the contract.

3. Pavement Grades: Min. 0.5%, Max. 5.0%.

4. Max. slope of landscaped areas to be 1:3.

5. Drainage swales with grades (min. 2%, max. 5%).

6. All conc. curbs shall be 150mm above finished

asphalt unless otherwise noted.

7. All sidewalk finishes to be bordered with conc.

curbs unless otherwise noted.

8. Depress concrete curbs at sidewalks to meet City's

standards for Right-of-way.

9. Provide 1070mm high guardrail where grade

difference exceeds 0.6m. As per OPSD 915.01.

10. Provide toe wall where grade difference exceeds

0.6m.

11. Frost collars are to be provided on curb stops and

valveboxes when located within the limits of the

driveway.

12. All existing roadways are to be maintained during

construction and restored to existing condition or

better post construction.

1. Information shown hereon and site servicing

drawing regarding the size and location of existing

services and/or utilities is furnished as the best

available information and shall be interpreted as

the contractor sees fit with the understanding that

the Owner disclaims all responsibility for its

sufficient and/or accuracy. Contractor to verify all

conditions, before proceeding with any work.

2. All dimensions shall be checked and verified in the

field prior to construction by the contractor and he

shall report any discrepancies immediately to the

Architect.

3. See grading and servicing drawings for sanitary

sewers.

4. See grading and servicing dwgs for storm sewers

and connections.

5. Minimum bedding requirements for storm and

sanitary sewers class 'B' per City standard.

6. Manholes for sanitary and storm sewers to be

precast concrete per City standard.

7. All catchbasins shall be installed in accordance

with City standard.

8. Watermains and water services less than or equal

to 50mm I.D. shall be type "K" copper c/w

compression style joints. Water service

connections shall be installed per City standard.

9. All watermain pipes greater or equal to 100mm I.D.

shall be P.V.C. pipe class 150 and satisfy

A.W.W.A. C900-75 specifications. All fittings shall

be mechanical joint, cement lined cast iron pipe

watermain. Depth of cover shall be 2.10m. Bedding

shall be per City standard.

10. Benching of sanitary/storm service M.H. by builder

to the satisfaction of the Director of Engineering.

11. Minimum clearance of 1.2m from all other services

must be maintained.

12. See grading and servicing dwgs for roof drainage.

13. Watermain to be installed with a minimum 1.7m

cover on property.

SITE SERVICING NOTES

CONCRETE CURB

DEPRESSED CONCRETE CURB

N.T.S.

N.T.S.

DETAIL 'B'

DETAIL 'A'

3rd Submission Drawing 09/03/10

4th Submission 09/05/14 M.P.

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SCALE : N.T.S.

LOT AREA 2,701 sq.m

LOT COVERAGE

ELECTRICAL BUILDING 3.1% (83.9 sq.m)

PARKING

6 spaces

(includes 1 accessible parking space)

LANDSCAPED AREA

1174.5 sq.m (43.5%)

HARDSCAPE AREA

CONCRETE 1,108.7 sq.m (41.0%)

ECO-RASTER MATERIAL 336.2 sq.m (12.4%)

SITE STATISTICS

North York, Ontario

M3H 2Z1

Unit 102

LANDSCAPE ARCHITECT: CIVIL ENGINEER:

PLANNER:

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PROPOSED ASHBRIDGES' BAY W.W.T.P.

BIOGAS CO-GEN PLANT

KEY PLAN

N.T.S.

STORM DRAINAGE PLAN

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PROPOSED ASHBRIDGES' BAY W.W.T.P.

BIOGAS CO-GEN PLANT

KEY PLAN

N.T.S.

SITE SERVICING PLAN