Submission checklists › Toronto Water & ECS

Sewer Use Permit or Discharge Agreement (Short Term Private Water Discharge)

City of Toronto: Toronto Water (EM&P) · version October 26, 2021, Rev. 2 (Rev. 1 December 2, 2020)

Cover letter including

1	Project description, description of the work (why do you need this discharge point?), dewatering method, site details (number and size of settling tanks, pump/gravity fed, size and length of piping, etc.)
2	Discharge duration, start and end dates
3	Confirm the following information is within the supporting permit documentation:
4	Maximum flow rate of peak discharge (L/min)
5	Maximum number of hours of discharge (hrs/day)
6	Maximum total discharge volume (L/day)
7	Proposed discharge point: sanitary/combined or storm sewer (include size of sewer and general location).
8	Confirm that the sample port will be installed 20–120 cm above grade level, will be 25 mm or larger, of a type such as a hose bib or ball valve with dampener or a port, and accessible to TW staff
9	Confirm a contingency plan for an alternative method of disposal or storage: a summary outlining the proposed alternative method of disposal or storage of private water (in the event that the discharge approval or discharge agreement expires or is suspended).
10	Confirm that the flowmeter will be digital and non-resettable, will register between 98% and 102% of the water actually passing through the meter(s), keeps a cumulative record of readings in litres only, and displays the instantaneous flow rate in litres per minute only. The discharge hose/pipe must be a suitable diameter for the flow meter design specifications so flow is accurately metered.
11	Confirm whether permanent infrastructure (if applicable) will be designed and constructed watertight, or if a Private Water Drainage System (PWDS) will be required
12	If a gate valve will be installed, confirm the rate it will be set at and that it will be locked. Provide the name and phone number of the individual responsible
13	Confirm that the flowmeter will be installed as per the manufacturer's specifications and City requirements, and will be non-resettable

Application forms

Private Water Discharge Approval Application (Form 1)

Short Term Private Water Discharge Application (Form 2 – Short Term) completed in its entirety, including:

If permanent infrastructure is NOT designed watertight and needs a PWDS, complete Form 3 in its entirety and submit with all supporting documentation (see System Wide Drainage Report below)
Average groundwater level on property
Depth of excavation
Proposed number of underground levels
Site grade elevation
Number of towers, number of podiums
Summary of development phases
Contamination history of soil and/or groundwater for premises (if applicable)

Administrative documentation

16	Property ownership documentation (e.g. title or lands schedule excerpt) with a property drawing showing the owner's lands/parcel
17	Completed Sewer Use Permit or Discharge Agreement Application Checklist
18	Property Owner's Consent Letter: consenting to the proposed private water discharge from the premises and identifying the authority and extent of such authority granted to the applicant
19	Business Name Registration or Letters of Incorporation/Letters Patent/Charter (Initial Notice/Notice of Change) or Partnership Registration (i.e. Partnership Declaration Form 3) and any amendments or changes. Include results of a corporate registry search conducted within 30 days of the application submission date
20	Company letter/documentation proving the applicant has signing authority (to bind the corporation)
21	If permanent infrastructure will be designed/constructed watertight, provide a PWDS confirmation letter signed and stamped by a P.Eng. licensed to practise in Ontario and qualified in the subject matter, confirming all buildings on the premises can be designed, constructed and maintained completely watertight
22	If permanent infrastructure will be designed/constructed watertight without the need for a PWDS, provide a letter signed by the Property Owner or a representative with authority to bind the property, confirming all buildings on the premises can be constructed and maintained completely watertight
23	Completed City of Toronto Sewer Use Permit or Discharge Agreement Application Checklist

Technical documentation

24	System Wide Drainage Report: if the permanent infrastructure is not designed watertight (will have a PWDS or a direct or indirect discharge to City sewage works), the short-term Private Water discharge approval will not be issued unless a long-term Private Water application has also been completed and submitted. For large linear infrastructure projects, a System Wide Drainage Report with estimated operational discharge volumes must be provided to Toronto Water for review and acceptance.
25	Sewer Capacity Analysis Report for the receiving sewer, to be reviewed and approved by Toronto Water WIM. Refer to the City's Sewer Capacity Assessment Guidelines (July 2021).
26	Hydrogeological Report for the premises indicating the maximum Private Water discharge flow rate and maximum total daily discharge volume
27	Site Servicing Plan (stamped) or CCTV Investigation Report, showing the connection from the private sewer to the City sewage works, if applicable

Drawings

Site Plan drawings or sketch drawings showing:

Site location
Discharge location indicating City catch basin(s), where applicable, and/or City sewer and maintenance access hole location (include photo of manhole)
Source of the water to be discharged and area to be dewatered
Location of proposed settling tank(s), indicating size and type
Location of flow meter(s) installed upstream of the sampling access point
Location of sampling access points
All temporary hoses or piping, including size, that will transport private water from the site into the City sewage works
North arrow, landmarks, road names, major intersections
Gate valve, if applicable
Treatment system, if applicable
Location of all temporary pumps that will collect and transmit private water from the premises to the City's sewage works
Dewatering method (note label indicating well system, etc.)

Plumbing drawing(s) showing the private sewer system and its connection to City sewage works

Other additional required information

30	PTTW or EASR (with authorization letter from the PTTW or EASR holder if not the same as the applicant).
31	Water quality data: Certificate of Analysis and Chain of Custody Record (COCR) of laboratory sample results (sample collected within 9 months prior to submission of the application). Clearly note the sample location.
32	When there is discharge of storm/runoff water only (no hydrogeological report necessary) due to accumulation in infrastructure or on site, etc., clearly state how the proposed daily volume was obtained and provide supporting documentation
33	Manufacturer's specifications for the proposed flow meter(s). The flow meter must be approved by Toronto Water, and a separate flow meter is required for each discharge location. Flowmeter installed as per the manufacturer's specifications and Toronto Water's requirements.
34	Flow meter calibration certificate (signed within 12 months) OR purchase receipt(s), if newly purchased and unused within the last 30 days: Calibration certificate: clearly indicates flow meter make, model, unit of measure, serial number(s), ±2% accuracy, pipe size diameter(s) and, if applicable, the register (e.g. digital display) make, model and serial number(s). If the flow meter has been previously used, provide a photograph of the current totalizer reading. OR purchase receipt(s): clearly indicates flow meter make, model, unit of measure, serial number(s) and, if applicable, register make, model and serial number(s)
35	Pump specifications, schedule, pump curve and pump capacity used to transmit private water from the site into the City sewage works

If pre-treatment of private water is required prior to discharge: operation and maintenance of the pre-treatment system (holding/sediment tank, treatment filter media, etc.)

36	Detailed description of the pre-treatment system and associated processes, design capacities, contaminants to be removed, estimated removal efficiency, performance objectives, collection and disposal of any treatment by-products, and operation and maintenance manuals of the devices and treatment system
37	Drawing/schematic indicating the installation location of the pre-treatment system as per the manufacturer's specifications
38	Mechanical drawing showing the source of the system's intake water and, if applicable, the backwash water discharge location, traced from the system to the final discharge location
39	Cross sections showing piping/plumbing of the proposed system(s)
40	Process flow diagram of the proposed pre-treatment system.
41	Pre- and post-treated water quality analysis data including Chain of Custody
42	If soil or groundwater contamination is known or suspected at the site, additional information must be submitted.
43	Spill Response Plan for chemicals used in the treatment system (must align with City spill notification requirements)
44	Copy of the ECA associated with the treatment system, if applicable

Once set up on site, date- and time-stamped photographs to Toronto Water at least 3 days prior to discharge (if not provided with the application)

45	Installed settling/discharge tanks
46	Installed flowmeter (installed as per the manufacturer's specifications and Toronto Water's requirements)
47	Photo of the flowmeter screen showing the starting volume registered
48	The height of the installed flow meter with a measuring tape. The flow meter shall be installed at a height of 60–120 cm.
49	The unobstructed length (no valves, flanges, etc.) of straight pipe run directly upstream of the flow meter, with a measuring tape. The straight pipe shall be the same diameter as the flow meter.
50	The serial number of the installed flow meter
51	The serial number of the associated E-Coder register(s)
52	Installed sample access port
53	Locked-out gate valve
54	The overall set-up of the installation location of the flow meter and sampling access point

This checklist identifies the scope of information typically required to support processing of an application. It is the responsibility of the applicant to consult with the approval authority prior to application submission to confirm the submission requirements for more complex or atypical applications.

Permits this checklist is for

Private Water Discharge Permit: Short Term (construction dewatering)

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