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BCC Ruling No. 96-56-539

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IN THE MATTER OF Subsection 24(1) of the Building Code Act, 1992.

AND IN THE MATTER OF Article of "the Building Code" (Ontario Regulation 419/89 as amended by Ont. Reg. 183/88, 581/88, 11/89 and 115/89)

AND IN THE MATTER OF an application by Ms. L.E. Rosenberg, Executive Director, Oshawa General Hospital, 24 Alma Street, Oshawa, Ontario, for the resolution of a dispute with Mr. Gerald N. Bilous, Chief Building Official, City of Oshawa, Ontario concerning whether connecting floor drains from the below grade levels of a multi-storey parking lot to the sanitary drainage system, without oil interceptors provides sufficiency of compliance with Article of the Ontario Building Code at Oshawa General Hospital Parking Garage, Alexandra Street, Oshawa, Ontario.


Ms. L.E. Rosenberg
Executive Director
Oshawa General Hospital


Mr. Gerald N. Bilous
Chief Building Official
City of Oshawa


Mr. Michael Lio, Chair
Ms. Susan Friedrich
Mr. Demir Delen


Toronto, Ontario


January 8th, 1997


Mr. Ian Sherman
Senior Mechanical Designer
MARS Group Ltd.
Scarborough, Ontario
Agent for the Applicant
Ennio Piccinato
Oshawa General Hospital
For the Applicant

Mr. Jim Hale
Plumbing Inspector
City of Oshawa
For the Respondent


  1. The Applicant

Ms. L.E. Rosenberg is the holder of a permit under the Building Code Act, 1992 to construct a multi-storey parking garage, at the Oshawa General Hospital at Alexandra Street, Oshawa, Ontario.

  1. Description of Constrution

The subject building is a parking garage consisting of 4 storeys open and above grade and 2 storeys below grade. The building is approximately 4,716 square metres in foot print area (total of 31,000 square metres) consisting of non-combustible construction with a sprinkler system on the below grade levels. Floor drains for the four above grade storeys will be connected to a storm drain system with oil interceptors and the two below grade storeys will be connected to a sanitary drain system.

  1. Dispute

The dispute between the Applicant and the Respondent concerns whether Sentence of the Building Code requires an oil interceptor to be provided on the sanitary sewer line that serves the two below grade floors of a parking garage.

  1. Provision of the Building Code Interceptors

Where the discharge from a fixture may contain oil or gasoline, an oil interceptor shall be installed.

  1. Applicant's Position

The Applicant submitted that the above grade storeys connected to a storm drainage system are equipped with oil interceptors. The below grade storeys will be drained to a sanitary drainage system that will be connected to a water treatment plant.

  1. Chief Building Official's Position

The Respondent submitted that the Building Code does not exempt parking garages and that Sentence of the Building Code requires that an oil interceptor be installed before connecting to the sanitary drainage system.

  1. Commission Ruling:

It is the decision of the Building Code Commission that the floor drains in the two levels below grade of the proposed parking garage, connected to the existing sanitary drain system without oil interceptors, provides sufficiency of compliance with Sentence of the Building Code.

  1. Reasons:

    1. The risk of discharge of oil or gasoline is deemed to be minimal in a parking garage based on the recommendations of the Interceptor Task Force to the Ministry of Municipal Affairs and Housing 1997 Ontario Building Code Proposals: "The consensus of the group is that parking garages not be required to have an oil interceptor".
    2. An oil interceptor is being provided for the floor drains from the upper four floors, connected to the storm drain system.
    3. The waste through the sanitary drain system is treated at a waste treatment plant prior to discharge.

Dated at Toronto, this 8th day, in the month of January, in the year 1997, for application number 1996-63.

Michael Lio

Susan Friedrich

Demir Delen