District of columbia sustainability regulatory update
Download
1 / 35

District of Columbia Sustainability - Regulatory Update - PowerPoint PPT Presentation


  • 126 Views
  • Uploaded on

District of Columbia Sustainability - Regulatory Update. 2013 Final Stormwater Rule Building Code Changes Zoning Changes – Green Area Ration and Minimum Pervious Surface Requirements. 2013 Final Stormwater Rule Restoring District Waterbodies for Residents, Businesses, & Visitors.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' District of Columbia Sustainability - Regulatory Update' - kipp


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
District of columbia sustainability regulatory update
District of ColumbiaSustainability - Regulatory Update

  • 2013 Final Stormwater Rule

  • Building Code Changes

  • Zoning Changes – Green Area Ration and Minimum Pervious Surface Requirements


2013 final stormwater rule restoring district waterbodies for residents businesses visitors
2013 Final Stormwater RuleRestoring District Waterbodies for Residents, Businesses, & Visitors




Imperviousness in the district
Imperviousness in the District Degradation

  • 43% of the District’s land area is impervious.

  • A single 1.2 inch storm falling on this area produces about 525 million gallons of stormwater runoff.


Impact on waterbodies
Impact on Waterbodies Degradation

Stormwater washes trash, sediment, oil, grease, pet waste, and other pollutants into District sewers and waterbodies.

6


Impact on waterbodies1
Impact on Waterbodies Degradation

Its sheer volume erodes stream channels, toppling trees, washing sediment downstream, and severely degrading aquatic habitat.


Impervious surface retrofits
Impervious Surface Retrofits Degradation

  • Retain runoff on site to mimic natural land cover.

  • Retention BMPs gradually make District “spongier.”

  • Essential for long-term restoration of waterbodies.

8


Regulated development key to retrofits
Regulated Development Key to Retrofits Degradation

  • New SW regs establish retention standards (2013 rule):

    • 1.2” storm retention – Projects disturbing 5k SF land.

    • 0.8” storm retention – Renovations over certain size & cost.

  • Most regulated development in District is redevelopment.

  • Scale of development makes it biggest driver of retrofits.

  • Gradual transformation of DC’s 43% impervious land cover.

Annual area retrofitted under SW regs (1% of DC land)

Annual area retrofitted via DDOE direct investment

:

1

10

.


Green roofs
Green Roofs Degradation


Stormwater tree and lid boxes
Stormwater DegradationTree and LID Boxes


Rainwater Harvesting Degradationfor Non-potable Uses


Stormwater retention credit trading
Stormwater Retention Credit Trading Degradation

  • Problem of imperviousness provides opportunity for trading.

  • Flexibility important to achieving acceptance of strong standards.

  • Trading can maximize triple bottom line of sustainability:

    • Maximize cost savings & flexibility for regulated sites.

    • Increase retention and accelerate restoration of waterbodies.

    • Increase socioeconomic benefits, with more LID

    • (health, aesthetics, environmental justice, green jobs).

    • SRC market may serve as tool for District to achieve retrofits at lower cost and with greater engagement of private sector.


Trading Degradation’s Potential to Increase Retention

  • Same retention for 1.2” storm:

Trading

Strict On-Site

5,000 + 5,000 =

10,000 gallons

10,000 gallons

14


Trading Degradation’s Potential to Increase Retention

  • Greater retention for storms smaller than 1.2”

  • Example – 0.6” storm:

  • 90% of storms in Washington DC are less than 1.2”.

  • This scenario yields 57% increase in annual retention.

Strict On-Site

Trading

5,000 gallons

5,000 + 5,000 =

10,000 gallons

15


Benefits to District Waterbodies Degradation

  • Increased annual retention District-wide.

  • Increased capture of first-flush volume.

  • Shift retention BMPs to most vulnerable tributaries and improve socioeconomic outcomes.

16


Off-Site Flexibility for Regulated Sites Degradation

  • Free to go off site after achieving 50% of required retention on site.

  • Two off-site options:

    • In-lieu fee (ILF) payment to DDOE = $3.50/gallon/year.

    • Use of Stormwater Retention Credits (SRCs).

  • Off-site volume is an ongoing obligation for property.

  • SRCs can be banked indefinitely.

  • Purchased SRCs remain valid if generating site fails.

  • SRCs from anywhere in the District can be used.


Generation of stormwater retention credits
Generation of Stormwater Retention Credits Degradation

  • DDOE is sole SRC-certifying authority.

  • DDOE will certify up to 3 years’ worth of SRCs every 3 years for eligible retention capacity.

  • Retrofit sites not permanently obligated to that use:

    • No maintenance covenant required.

    • Maintenance obligation can be ended by forfeiting SRCs or purchasing replacement SRCs for DDOE to retire.

  • Retrofits must be maintained for period of SRC certification or until obligation ended.


Example src transaction

Grocery parking lot voluntarily installs 4,000 gal bioretention to generate 3 years of SRCs or 12,000 SRCs.*

Church parking lot voluntarily installs 2,000 gal bioretention to generate 3 years of SRCs or 6,000 SRCs.

Regulated site has 3,000 gal yearly offsite obligation & purchases total of 18,000 SRCs to comply for 6 years.

By end of 6-year period, regulated site purchases additional credits or pays in-lieu fee.

*Note: Opportunity for discount on stormwater impervious fee provides layered incentive for retrofit.

Example SRC Transaction

19


Potential financial return

*SRC value based on projected cost to recoup costs, not market analysis. Costs include capital, maintenance, land, and return on investment.

Potential Financial Return

20


Transition plan
Transition Plan market analysis. Costs include capital, maintenance, land, and return on investment.

Transition Period 1 ends

Final Rule Published

Transition Period 1 180 days

July 19, 2013

January 15, 2014

  • Transition Period 1

  • Regulated projects comply with existing regulations.

  • Tied to submittal of first SW Management Plan as part of building permit application process.

21


Transition Plan market analysis. Costs include capital, maintenance, land, and return on investment.

Transition Period 2A ends

Transition Period 1 ends

Final Rule Published

January 15, 2015

Transition Period 2A 365 Days

Transition Period 1 180 days

Transition Period 2B 545 Days

July 19, 2013

January 15, 2014

Transition Period 2B ends

July 14, 2015

  • Transition Period 2A and 2B

  • Minimum on-site retention requirement waived.

  • Entire retention volume may be achieved off site.

22


Transition plan1
Transition Plan market analysis. Costs include capital, maintenance, land, and return on investment.

Transition Period 2A ends

Transition Period 1 ends

Final Rule Published

January 15, 2015

Transition Period 2A 365 Days

Fully effective for Major Land Disturbing Activities

Transition Period 1 180 days

Fully effective for Major Substantial Improvements

Transition Period 2B 545 Days

January 15, 2014

Transition Period 2B ends

  • Fully Effective – Except:

  • Certain projects (“Advanced Design”) with unexpired approval by Zoning Com. or NCPC - Subject to TP when application submitted.

  • Additional grounds for on-site relief for projects with unexpired approval (from HPRB, CFA, BZA, DCOP, NCPC) that conflicts with on-site BMP – If application submitted prior to end of TP2A/TP2B.

July 14, 2015

23


Greening the District’s market analysis. Costs include capital, maintenance, land, and return on investment.

Building Codes


Goals market analysis. Costs include capital, maintenance, land, and return on investment.

  • Green the construction code to the maximum extent practicable.

  • Codify the best practices currently followed by green building leaders in the District.


Compliance Paths market analysis. Costs include capital, maintenance, land, and return on investment.

  • Green Building Act

  • Int’l Green Construction Code (IgCC)

  • ASHRAE 189.1

  • LEED

  • Green Communities

  • National Green Building Standard


Code summary scope
Code Summary - Scope market analysis. Costs include capital, maintenance, land, and return on investment.

  • Covers all commercial projects (10,000 SF and larger)

  • Covers multi-family residential 4 stories and larger (and 10,000 SF and larger)


Transitory provisions for the revised codes
Transitory Provisions for the Revised Codes market analysis. Costs include capital, maintenance, land, and return on investment.

  • Exceptions (Section 123 Building Code)

    • Projects with existing building permits

    • Projects with existing design contracts or existing filed application

    • Tenant layout permits for previously built Core and Shell buildings


Green area ratio regulation
GREEN AREA RATIO market analysis. Costs include capital, maintenance, land, and return on investment.REGULATION


Green area ratio
Green Area Ratio market analysis. Costs include capital, maintenance, land, and return on investment.

What is it?

A flexible green site design requirement that varies by zone.

How Achieve?

Choose from a range of environmental landscaping practices each of which have been assigned an environmental performance ranking.

Examples may include…

Impermeable pavement

Impermeable roof

Un-vegetated permeable pavement

Vegetated permeable pavement

Green roofs

Natural ground cover

Rain gardens

Trees & shrubs

Green facades


Gar how does it work
GAR: How Does it Work? market analysis. Costs include capital, maintenance, land, and return on investment.

How to calculate:

Add up landscape elements by number or size

# trees

Size of green roof

Size of rain garden

# of plants

Soil depths

Divide by lot area

= GAR score


Related zoning requirements

Pervious surface requirements market analysis. Costs include capital, maintenance, land, and return on investment.

Landscaping for parking lots

RELATED ZONING REQUIREMENTS


Pervious surface requirements
Pervious Surface Requirements market analysis. Costs include capital, maintenance, land, and return on investment.

In zones R-1 through R-4

Applies when increasing existing lot occupancy by 10%+ or 25%+ for historic structures

Pervious = grass; mulched groundcover; plants; trees; permeable pavers; and decks or porches


Landscaping for surface parking
Landscaping for Surface Parking market analysis. Costs include capital, maintenance, land, and return on investment.

Minimum 10% of lot landscaped

Landscape end islands of 9+ spaces

Trees must be min. 2.5” dbh at planting

Plant 4’ from protective barriers

Special exceptions if impracticable


Questions

Jeff Seltzer market analysis. Costs include capital, maintenance, land, and return on investment.

202-535-1603

[email protected]

To download the District’s Final Rule and Stormwater Management Guidebook, & related resources, visit:

ddoe.dc.gov/swregs

For additional information on the Green Area Ratio visit:

ddoe.dc.gov/gar

For additional information on the Green Building Codes:

ddoe.dc.gov/greenbuildings

QUESTIONS?

35


ad