HomeMy Public PortalAboutPlanning Board Packet 11/02/21 supplementalSUPPLEMENTAL PACKET, 11/02/21
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Draft Stormwater Management Regulations dated 10/22/21:
Comparison of Minor and Major Stormwater Permit Requirements
Minor Permit Major Permit
Threshold
500-2,000 sq. ft. of net impervious area
and/or 10,000-20,000 sq. ft. of land
disturbance
Exceeds thresholds for Minor Permit
Application Form Required Required
Stormwater Management
Plan
• Project narrative
• Drawing, map, or plans of existing
conditions, proposed work and erosion
and sediment controls
• Stormwater volume calculations for
stormwater best management
practices (BMPs)
• Operations and maintenance
description
• Site plan including:
- Existing conditions
- Proposed conditions
- Erosion and sediment control
- Construction details
• Stormwater Management Report
• Operations and Maintenance Plan
Public Meeting Not required Required
Stormwater Management
Certificate of Compliance
(SMCC)
Not required Required
Review and Waiver
Authority
Designated Agent
(Town Staff)
Stormwater Authority
(Conservation Commission or Planning
Board)
Construction-site
Stormwater Management
Maximum extent practicable;
Prevent erosion, sediment, and waste
nuisance conditions
Required
Low Impact Development Required unless impracticable (a lower
standard than “infeasible”) Required unless infeasible
Post-Construction
Stormwater Management
At least one stormwater BMP installed
(e.g., rain garden, rain barrel) to manage 1
inch runoff from net impervious area or
500 sq. ft., whichever is greater.
Meet MA Stormwater Standards and
pollutant removal standards for
phosphorus and nitrogen.
Design for shutdown and containment
if on commercial or industrial land
uses.
Construction Inspections Requirements determined by Designated
Agent, as needed
Required and procedures
documented
Long-Term Operations and
Maintenance (O+M) Maintain to ensure BMP function
Required:
• O+M Plan
• Documentation of O+M
• Additional O+M requirements
determined by Stormwater
Authority or Designated Agent, as
needed
Surety Not Required May be required by Stormwater
Authority
Application Fee $50 $100
Example Site Approximate Areas Image
Brewster Town
Hall
2198 Main
Street (6A)
Parking Lot: ~35,000 sq ft
Building: ~13,000 sq ft
Eddy
Elementary
School
2298 Main
Street (6A)
Parking Lot #1: ~9,700 sq ft
Parking Lot #2: ~25,000 sq ft
Building: 57,000 sq ft
Commercial
Property at
Corner of Main
Street (6A) and
Underpass
Road
Parking Lot: ~16,000 sq ft
Building: ~3,800 sq ft
Underpass Road #2
#1
Example Site Approximate Areas Image
Cumberland
Farms and
Foster Square
2639 & 2655
Main Street
(6A)
Parking Lot: ~50,000 sq ft
Building: ~5,000 sq ft
(Cumberland Farms*)
Sample
Residential
Addition
Existing Building: 2,000 sq ft
Garage Addition: 400 sq ft
Typical Two
Car Garage
Building: 400-700 sq ft
20’
20’
20’
50’
Existing
Proposed
40’
'
*
Example Site Approximate Areas Image
Typical
Driveways
700 - 3,000 sq ft and up
Typical long driveway:
12 ft wide x 100 ft long =
1,200 sq ft