Hydro One Networks Inc. - Environmental Compliance Approval (sewage)

Instrument type: Environmental Compliance Approval (sewage)

ERO number
019-5815
Ministry reference number
1000130521
Notice type
Instrument
Act
Environmental Protection Act, R.S.O. 1990
Posted by
Ministry of the Environment, Conservation and Parks
Notice stage
Proposal
Proposal posted
Comment period
August 4, 2022 - September 18, 2022 (45 days) Open
Last updated

This consultation closes at 11:59 p.m. on:
September 18, 2022

Proposal summary

This proposal is for an amendment to Environmental Compliance Approval No. 7470-4XGRM5 (industrial sewage) for Hydro One Networks Inc. for the collection, transmission, treatment and disposal of stormwater at the Hanover Transmission Station, located at 341020 Grey County Road 28, in the Town of Hanover, Ontario.

Location details

Site address

341020 Grey County Road 28
Hanover, ON
Canada

Site location map

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Proponent(s)

Hydro One Networks Inc.
483 Bay Street
Toronto, ON
M5G 2P5
Canada

Proposal details

This proposal is for an amendment to Environmental Compliance Approval No. 7470-4XGRM5 (industrial sewage) for Hydro One Networks Inc. for the collection, transmission, treatment and disposal of stormwater at the Hanover Transmission Station, located at 341020 Grey County Road 28, in the Town of Hanover, Ontario.

The station houses four (4) existing power transformers (T1, T2, T3 and T4). T2 will be replaced with a new power transformer (4T2) and the existing T1, T3 and T4 will remain. The new transformer will be equipped with a new concrete spill containment pit. The existing units will retain their existing spill containment.

The proposed spill containment system consists of building one (1) spill containment pit for new T2 with a capacity of approximately 61.96 cubic metres, discharging to a proposed oil-water separator having an oil capacity of approximately 82.58 cubic metres.

The sump pump system being used for the current transformers T1 and T2 shall be replaced by one (1) proposed oil water-separator (OWS). The sump pump system being used for the current transformers T3 and T4 will remain.

The system at Hanover TS drains all collected runoff to two (2) drainage outlets which eventually flow to the south station perimeter ditch then to a low lying area along an abandoned rail line where the majority infiltrates into the ground. A small portion of the station effluent ultimately flows overland to Lake Huron via the Saugeen River.

Supporting materials

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Client Services and Permissions Branch
Address

135 St Clair Ave West
1st Floor
Toronto, ON
M4V 1P5
Canada

Office phone number

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