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Stormwater Charge and Credit Program Multi-Residential Credit Program Seminar December 7th, 2015
Dr. Victoria Kramkowski Stormwater Charge Program Coordinator Transportation & Works Department
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Stormwater in Mississauga Why is the City introducing a Stormwater Charge?
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Mississauga's stormwater infrastructure has a current
replacement value of $1.9 billion
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200km of waterways
2000km of storm sewers
Photo Credit: Aaron Volkening
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1000 outlets
57 SWM ponds
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250km of ditches and swales
51,000 catch basins
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Increased investment is needed to maintain level of service and
state of good repair
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Flood mitigation
Erosion control 8
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Replace aging pipes
SWM pond clean-outs 9
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Water quality control
By-law enforcement and spill response
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Changing climate, changing storms 11
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User fees are a fair and dedicated way to fund this essential service
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Stormwater Charges How are charges assessed and applied?
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Stormwater Charge Calculation
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Stormwater Charge
Assessment (billing units)
Stormwater Rate
($/billing unit)
Stormwater Charge
($)
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Assessment: Residential Properties
Tier Billing Units
Smallest 0.5
Small 0.7
Medium 1.0
Large 1.2
Largest 1.7
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REPLACE
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Assessment: Multi-Residential and Non- Residential Properties
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• Impervious (hard) surface area of property individually assessed
• 1.0 Billing Unit per 267m2 (2,874 sq. ft.) of hard surface area
• Charge will appear on Peel water bill or storm-water only bill
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Stormwater Estimator Look up your property at www.stormwatercharge.ca
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Stormwater Credits How are on-site stormwater works considered?
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Established Principles • Credits will reward
stormwater Best Management Practices (BMPs) providing direct City-wide benefits
• Credit amounts will be proportional to the benefit received by City’s stormwater program
Usually on Private
Property
May occur on Private Property or
Public System
Usually in Public System
Original Public System
Low Impact Development and
Emerging Practices
Traditional Infrastructure and
Watercourses
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Image Credit: Grand Valley State Univresity (www.gvsu.edu/stormwater)
Permeable Not Permeable
Permeable Pavement
Bioswales
Underground Detention Facility
Green Roofs
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Program Basics • Multi-Residential and Non-Residential properties
are eligible
• Maximum credit is 50%
• Credits effective for 5-year, renewable terms
• Applications are accepted for existing or proposed stormwater BMPs
• Program provides flexibility to property owners in the BMP types they implement
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Application Package
• All application packages to consist of: – Completed application form – Supporting documentation, certified by
qualified P.Eng.
• May submit online, by mail, or in person
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Application Types
• New Credit – First time credit for existing or
proposed works
• Credit Update – Update credit amount to reflect
changes to stormwater BMPs
• Credit Renewal – Approved credit about to be or
recently expired
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Focused on how BMPs meet credit criteria
Focused on how BMPs remain in state of good repair
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Review Process (Existing BMP)
• Step 1: Screen application for completeness • Step 2: Technical review
– Response to Applicant within 30 days – Site visit may be required – Reviewer may have comments for Applicant to
address
• Step 3: Decision on credit approval • Step 4: Credit made effective on account
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Review Process (Proposed BMP)
• Step 1: Screen application for completeness • Step 2: Technical review • Step 3: Decision on pre-approval • Step 4: Applicant submits certification that
BMPs are constructed and operational • Step 5: Review and decision • Step 6: Credit made effective on account
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Credit Schedule
Category Evaluation Criteria Weighting
Peak Flow Reduction
Percent reduction of the 100-year post-development flow to pre-development conditions of the site
Up to 40%
Total No M
ore than 50%
Water Quality
Treatment
Consistent with Provincial criteria for enhanced treatment Up to 10%
Runoff Volume
Reduction
Percent capture of first 15 mm of rainfall during a single rainfall event Up to 15%
Pollution Prevention
Develop and implement a pollution prevention plan Up to 5%
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Peak Flow Reduction (up to 40%)
• For full credit: Control 100-year post-development flow to 100-year pre-development rate from entire impervious surface area(s) of site
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Fraction of Target
Met 40% Credit
Amount
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Water Quality Treatment (up to 10%)
• For full credit: Direct all impervious areas of site to an on-site BMP meeting criteria for water quality
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Fraction of Impervious
Areas Serviced
10% Credit Amount
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Runoff Volume Reduction (up to 15%)
• For full credit: First 15mm of rainfall landing on all impervious areas of site during a single rainfall event is captured
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Each mm of rainfall captured
1% Credit Amount
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Pollution Prevention Plan (up to 5%)
• For full credit: Pollution Prevention Plan satisfies criteria set out in Schedule ‘A’ of the City’s Storm Sewer By-law 259-05 and is fully implemented
Percent of Pollution Prevention Plan Implemented
Credit Amount
40% 2%
60% 3%
80% 4%
100% 5% 31
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Terms and Conditions
• Standard terms and conditions of approval – May also be site specific
• Expectations for operation, inspection and maintenance of BMPs – Logs to be kept by Applicant/Owner for
compliance inspection and/or credit renewal
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Effective Dates for Approved Credits
• Applications received in 2016 will be retroactive to January 1st, 2016 or when BMP measures were implemented, whichever is later
• Applications received from 2017 onwards will be retroactive to date application is deemed complete or when BMP measures were implemented, whichever is later
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Thank You Visit www.stormwatercharge.ca • Charge Estimator • Reports and Policies • Request for Review of Stormwater Charge Assessment • Credit Program • More Information
Contact us at [email protected]