Sanitary Discharge Agreement -
Wellesley Central Hospital
(Ward 24 - Downtown)
The Works Committee recommends the adoption of the following report (August 31, 1999) from the Commissioner
of Works and Emergency Services:
Purpose:
To allow the Wellesley Central Hospital to enter into a Sanitary Discharge Agreement with the City of Toronto permitting
it to discharge from its private water system into the sanitary sewer system and pay a surcharge fee.
Funding Sources, Financial Implications and Impact Statement:
This Department currently has 30 Sanitary Discharge Agreements, which allow for the recovery of approximately
$700,000.00 per year in treatment costs. These charges reflect a user pay philosophy and directly recover the cost of
operating our treatment plants.
Recommendation:
It is recommended that we be authorized to enter into a Sanitary Discharge Agreement with the Wellesley Central Hospital
for the discharge of treated ground water from its private water system at 10 Wellesley Place to the sanitary sewer system,
under terms and conditions satisfactory to the City Solicitor and the Commissioner of Works and Emergency Services.
Council Reference/Background/History:
On June 24, 1980, Metropolitan Council adopted Clause No. 1 of Report No. 10 of The Works Committee, approving
By-law No. 96-80, authorizing execution of agreements with industries permitting them to discharge effluent from a
private water system into the Metropolitan Toronto sanitary sewer system, or any sewer system draining into the
Metropolitan Toronto sanitary sewer system, under conditions of payment for treatment.
Comments and/or Discussion and/or Justification:
ALTECH Environment Consulting Ltd. is assisting the Wellesley Central Hospital in the remediation of subsurface
hydrocarbon contamination at their site located at 10 Wellesley Place.
Ground water will be pumped from a collection system into a 55-gallon retention drum. The collected ground water will
then be pumped from the retention drum into a series of carbon drums to remove any hydrocarbons, before discharging into
the sanitary sewer system on Wellesley Place. The resulting discharge from the drums will be treatable within the City
Sewer Use By-law limits. There will be a sampling port between the carbon drums to determine performance and
replacement of the carbon drums.
The remediation program is expected to last at least two years, and the anticipated maximum discharge into the sanitary
sewer system will be 62.5 litres per hour. Water quality monitoring will be conducted on a regular basis during the
pumping operation to ensure compliance with the Ministry of the Environment's 1997 Guideline for Use at Contaminated
Sites in Ontario, Table B, Industrial/Commercial Land Use Criteria in a Non-Potable Ground Water Situation, and the
Toronto Sewer Use By-law No. 153-89. Samples of the influent and effluent will be taken immediately after start-up, once
a week for the first month, monthly for the first quarter and quarterly until the end of the project.
Conclusions:
In accordance with our policy with regard to By-law No. 96-80, the Wellesley Central Hospital, through its consultant, has
been notified of the surcharge rate of $0.3859 per cubic metre to be levied in 1999, and has signified agreement to the
surcharge amount.
Contact Name:
Vic Lim, P. Eng.
Manager
Industrial Waste and StormWater Quality
Telephone: 392-2966; Fax: 397-0908
