vt dec stormwater program...3-acre site •roughly 1,000 sites statewide •half are previously...
TRANSCRIPT
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Stormwater Program Update
New Rule and General Permit
VT DEC Stormwater Program
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• 13 staff
• Several permit programs
• > 4,000 regulated sites
Stormwater Program
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Authorities
Federal Clean Water Act. Vermont Statute
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Operational Permitting
Impervious Surface > 1 acre
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• 60,000 acres, statewide –roughly
• < 10% are currently regulated
Impervious Surfaces
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Lake Champlain Phosphorus TMDLs
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Sources of phosphorus in the Vermont portion of the Lake Champlain Basin (Preliminary estimates from Tetra Tech, 2013)
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Sources of phosphorus in the Vermont portion of the Lake Champlain Basin (Preliminary estimates from Tetra Tech, 2013)
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Stormwater Pollutant Loading
• Champlain TMDLs require a 21% reduction from “Developed Lands”
• How achieved?
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Act 64 and Champlain TMDLs Requirements
• Municipal Roads General Permit
• MS4 General Permit
• TS4 General Permit
• New Stormwater Permitting Rule
• “3-Acre General Permit”
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• Adopted
• Went into effect on 3/15/2019
Stormwater Rule
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• Covers all stormwater permit programs
• Includes requirements for “3-acre sites”
Stormwater Rule
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3-Acre General Permit
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• Single tract with >3 acres of impervious surface with no permit, or a pre-2002 permit; or,
• A multi-lot project with a pre-2002 stormwater permit for >3 acres of impervious surface;
• And, adjacent impervious surfaces where part of a related operation, e.g. a campus
3-Acre Site
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• Roughly 1,000 sites statewide
• Half are previously permitted
3-Acre General Permit
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• General Permit - due 4 months after Rule
• Permit Coverage No Later Than:
• Champlain and Memphremagog -2023
• Rest of the State – 2033
3-Acre General Permit
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• Requirements
• Retrofit Stormwater System
• Maximize treatment on site
• Vermont Stormwater Management Manual
3-Acre General Permit
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• For example, don’t need to:
• Purchase additional land
• Pump stormwater
• Construct in flood plains or wetlands
Engineering Feasibility Analysis(EFA)
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• Stormwater rule and 3-Acre GP
• “shall allow use of”
• Offsets
• Impact fees
• Trading
Stormwater Impact Fees
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• Incentives - pay if you can’t treat
• Equity – everyone contributes
Impact Fees
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• Channel Protection Volume
• $25,000 per acre of impervious Surface
• Redevelopment Standard (50% of Water Quality Volume)
• $25,000/acre * (required volume – actual volume)
• $25,000/acre * (50% - 0%) = $12,500/acre
Impact Fees
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Standard not
met --> $
Fund $
--> $ Project exceeding standards
Impact
Fees
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• Stormwater Only
• Permit obtained
Impact FeesEligible Projects
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• Rule
• Effective March 15, 2019
• General Permit
• Due July 2019
• Draft for public comment – soon
Rule and General PermitTiming
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• Schedule for 3-Acre Sites
• BMPs for “isolated impervious surfaces”
• <400 ft2
• BMPs for isolated roads
• Same as municipal roads
Key General Permit Decisions
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Rule Information
• http://dec.vermont.gov/watershed/stormwater/stormwater-rule-2017-update
• E-mail Distribution List
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Questions?