1.
Helping developers navigate the new green infrastructure rules
We’ve got to do what now?
Architect: Marchetto Higgins Stieve
Photographer: Don Pearse

2.
Poll Time

3.
AGENDA
• Key changes to NJDEP’s Stormwater Rules (NJAC 7:8)
• How to use the Developers Green Infrastructure Guide 2.0
• Strategies for overcoming challenging site conditions with green
infrastructure.
• Extended Q&A

4.
Send in your
questions through
the Q&A button on
your control panel.
What's the tough
question about green
infrastructure you wish
someone would ask?

5.
Architect: Marchetto Higgins Stieve
Photographer: Don Pearse

6.
Stormwater Management Rule Amendments
Adopted 3-2-2020
Jim Murphy
Bureau of Nonpoint Pollution Control
Division of Water Quality
New Jersey Department of Environmental Protection

7.
Topics
• Three Key Rule Changes
• Interim Activities
• BMP Updates
• Training

8.
Key Changes under the Rule Amendments
• Definition Changes and Additions
• Green Infrastructure
• Major Development
• Green Infrastructure Standard
• Clarify Applicability of Water Quality Standard

9.
Green Infrastructure Definition
N.J.A.C. 7:8-1.2
Means a stormwater management measure that manages
stormwater close to its source by:
1. Treating stormwater runoff through infiltration into subsoil;
2. Treating stormwater runoff through filtration by vegetation or
soil; or
3. Storing stormwater runoff for reuse.

10.
Definition Changes Under N.J.A.C. 7:8-1.2
• Added definition of “regulated motor vehicle surface”
• Added definition of “regulated impervious surface”
• Changed definition of major development
• 1 acre or more of disturbance since 2/2/04; or
• ¼ acre of regulated impervious surface since 2/2/04; or
• ¼ acre of regulated motor vehicle surface since 3/2/21

11.
Application of Water Quality Standard
• “Old” Rule – Impervious Surfaces
• New Rule - Motor Vehicle Surfaces
• Rule text does not require roofs or sidewalks to be treated – consistent
with current implementation
• Included in Definition of Major Development

12.
Green Infrastructure Standard
N.J.A.C. 7:8-5.3
• GI BMPs must be used to satisfy recharge, quantity, and quality
• 3 Tables identifying the performance of each BMP in meeting the
standards
• Table 5-1: Recharge, Quality, and Quantity Control
• Table 5-2: Quantity Control (Recharge & Quantity w/Waiver or Variance)
• Table 5-3: Recharge, Quality, and Quantity Control ONLY with Waiver or Variance
• Maximum Contributory Drainage Area Limitations specified
• Maintain existing ability to propose an alternative stormwater design.
Alternative design must meet GI definition and must meet drainage area
limitation if similar to BMP with limit.

13.
Table 5-1: GI BMPs for recharge, quantity, and quality
Best Management Practice Quality
TSS removal rate
(percent)
Quantity Recharge Minimum separation
from seasonal high
water table
(feet)
Cisterns 0 Yes No -
Dry Wells 0 No Yes 2
Grass Swales 50 or less No No 2
Green Roofs 0 Yes No -
Manufactured Treatment
Device (MTDs)
50 or 80 No No Dependent upon the
device
Pervious Paving Systems 80 Yes Yes
No
2
1
Small-scale Bioretention
Systems
80 or 90 Yes Yes
No
2
1
Small-scale Infiltration Basins 80 Yes Yes 2
Small-scale Sand Filters 80 Yes Yes 2
Vegetative Filter Strips 60-80 No No -
Drainage area limitation applies to: dry wells, MTDs, pervious paving system, and small-scale bioretention,
infiltration, and sand filters.
Table 1 only includes MTDs that meet the definition of GI

14.
Best Management
Practice
Quality
TSS removal rate
(percent)
Quantity Recharge Minimum
separation from
seasonal high
water table
(feet)
Bioretention Systems 80 or 90 Yes Yes
No
2
1
Infiltration Basins 80 Yes Yes 2
Sand Filter 80 Yes Yes 2
Standard Constructed
Wetlands
90 Yes No N/A
Wet Ponds 50-90 Yes No N/A
Table 5-2: GI BMPs for quantity (recharge and quality only with waiver or variance)
Wet ponds used under Table 2 must be designed to have native vegetation and a reuse component

15.
Best Management
Practice
Quality
TSS removal rate
(percent)
Quantity Recharge Minimum separation from
seasonal high water table
(feet)
Blue Roofs 0 Yes No N/A
Extended Detention Basins 40-60 Yes No 1
Manufactured Treatment
Device
50 or 80 No No Dependent upon the device
Sand Filters 80 Yes No 1
Subsurface Gravel Wetlands 90 No No 1
Wet ponds 50-90 Yes No N/A
Table 5-3: BMPs that may only be used if a waiver or variance is granted

16.
Under the New Rule…
• Be Cognizant of Prior Disturbance
• Consider the Date(s) in terms of Major Development Definition
• Runoff Must be Treated Close to the Source
• Motor Vehicle Surfaces
• https://www.nj.gov/dep/rules/adoptions.html

17.
Interim Activities
• Amended Rules adopted: March 2, 2020
• Amended Rules operative: March 2, 2021
• Grandfathering provisions: see NJAC 7:8-1.6(b)
• Municipal stormwater ordinances must be revised
and in effect by March 3, 2021.
• Updated model ordinance posted on DEP web page

18.
NJ Best Management Practices Manual -
Updates
Comment Period Closed 5/1/20:
• Chapter 5 – Stormwater Mgmt. Quantity and Quality
Standards and Computations
• Chapter 12 – Soil Testing Criteria
Recently Posted Final Updates:
• Chapter 13 – Groundwater Table Hydraulic Impact
Assessments for Infiltration BMPs
• Appendix D – Model Municipal Stormwater Ordinance

19.
NJ Best Management Practices Manual -
Updates
Edits in Progress:
• Chapter 3 – Munic. and Regional SW Mgmt Planning
• Chapter 4 – Stormwater Pollutant Removal Criteria
• Chapter 9 – GI BMPs
• Chapter 10 – GI BMPs with Waiver
• Chapter 11 – Non-GI BMPs
BMP Manual:
https://www.njstormwater.org/bmp_manual2.htm

20.
NJDEP Training
• Design Reviewer Training
• 2-days, re-scheduled for July
• Fall Training – impacts of adopted Rule
• Training website: https://www.njstormwater.org/training.htm

21.
Thank you!
Jim Murphy
Stormwater Management Unit
Bureau of Nonpoint Pollution Control
Division of Water Quality
James.Murphy@dep.nj.gov
609-633-7021

22.
Send in your
questions through
the Q&A button on
your control panel.
What's the tough
question about green
infrastructure you wish
someone would ask?

23.
What is the purpose of the guide?

24.
What is the purpose of the guide?
• To help developers understand and navigate the new rule
adoption as well as upcoming changes to the companion BMP
Manual

25.
What is the purpose of the guide?
• To help developers understand and navigate the new rule
adoption as well as upcoming changes to the companion BMP
Manual
• Illustrate how the new rule is a positive change from the current
status quo

26.
What is the purpose of the guide?
• To help developers understand and navigate the new rule
adoption as well as upcoming changes to the companion BMP
Manual
• Illustrate how the new rule is a positive change from the current
status quo
• Highlight common practices which have been removed and
benefits to be gained

27.
What Is In and What Is Out?
IN:
Decentralized green infrastructure
OUT:
Gray and exclusively “End of Pipe”
stormwater basins
BENEFIT:
More efficient systems with
potential for greater project yield

28.
What Is In and What Is Out?
IN:
Infiltration “Counts”
OUT:
Redundancy in engineering
calculations
BENEFIT:
Smaller more accurately sized systems
save on construction costs and
increase developable area

29.
What Is In and What Is Out?
IN:
Objective mathematical standards
OUT:
Subjective review criteria
BENEFIT:
Predictable and efficient
permitting and approval process
“Maximum Extent
Practicable”

30.
There are Eight
Chapters in the Guide
• NJ Stormwater Rules and
Requirements
• Types of Green Infrastructure
• Pre-Rule Change Vs. Post-
Rule Change Side-By-Sides
• Addressing Challenges,
Solving Problems
• Case Studies – Industrial,
Mixed Use, Multi-Family,
Healthcare
• Benefits of Green
Infrastructure
• Frequently Asked Questions
• Resource List

31.
Kemble Park Bioswale
Image Credit: E&LP Associates

32.
Shoemaker Green
Image Credit: Andropogon Associates

33.
Molly Dodd Anderson Library
Image Credit: Viridian Landscape Studio

34.
Ed Confair, PE, PLA
Senior Program Manager, Resiliency
E&LP Associates
econfair@elp-inc.com
215-330-4113 Ext. 311

35.
Common/Perceived GI Challenges
• Limited room
• Shallow seasonal high
water table
• Poor soils
• Urban redevelopment
• Brownfields
• No receiving storm sewer
or waterway

36.
Limited Room

37.
Limited Room

38.
Shallow Groundwater/Poor Soils

39.
Shallow Groundwater/Poor Soils

40.
Shallow Groundwater/Poor Soils

41.
Urban Redevelopment

42.
Brownfields
• Lined GI works:
• Porous Pavement
• Bioretention
• Wet Ponds

43.
Warehouse
• Roof Recharge
• Pervious Concrete
• Perimeter Bioretention
• Wet Ponds

44.
Industrial
PROJECT
Fratelli Beretta
Mount Olive,
NJ
CUPOLEX DESIGN
Infiltration tank formed with
CUPOLEX RIALTO®.
STORAGE VOLUME
590m3 (21,000 cu.ft)
PROJECT
REFERENCES

45.
Thank You!

46.
Contact Us
George Vallone
President
The Hoboken Brownstone Company
2015 President
NJ Builders Association
gvallone@hbrownstone.com
James Murphy
Supervising Environmental Engineer
NJ Department of Environmental Protection
James.Murphy@dep.nj.gov
Edward Confair, PLA, PE
Senior Program Manager, Resiliency
E&LP Associates
econfair@elp-inc.com
Jeromie Lange, PE
Senior Principal
Maser Consulting
jlange@maserconsulting.com
Kandyce Perry
Planning and Policy Manager
New Jersey Future
kperry@njfuture.org

47.
NOW LIVE!
CHECK IT OUT! NEW STORMWATER RULE. NEW GUIDANCE.

48.
Extended
Q&A
1:00-1:30 pm