Derry Township Municipal Authority S tormwater Management Program - - PowerPoint PPT Presentation

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Derry Township Municipal Authority S tormwater Management Program - - PowerPoint PPT Presentation

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S tormwater S takeholder Advisory Committee Derry Township Municipal Authority S tormwater Management Program Meeting #8 - October 5, 2016 Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Derry Township Municipal Authority

S tormwater S takeholder Advisory Committee

S tormwater Management Program

Meeting #8 - October 5, 2016

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Agenda

  • 1. Pollution Reduction Plans (PRP)
  • 2. Credit Policy Development
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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Pollution Reduction Plans

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Mapping

Mapping has been a requirement of the MS4 permit, so what’s new?

1. Land Use

  • Category
  • Pervious/ Impervious

2. S t orm S ewersheds 3. Locat ions of proposed st ruct ural BMPs The first t wo help us develop our baseline pollut ion level The t hird t ells us where and how we’ re going t o meet our impairment reduct ions

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

What’s a S torm S ewershed?

  • Think of it as a t ype of wat ershed
  • Out let point is a st ormwat er out fall
  • Upslope cont ribut ing area is dict at ed by

t opography and inlet s/ pipe net work

  • Wat ersheds are fairly simple t o delineat e, but

st orm sewersheds t ake a lit t le more t ime

  • Because t he area is defined by t he

cont ribut ing infrast ruct ure, one must have t hat infrast ruct ure accurat ely mapped first

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Mapping

Why is all this new stuff needed?

  • New permit requires the completion of Pollution Reduction Plans

(PRP)

  • S

ets specific reduction targets for local impaired streams

  • S

iltation - 10% sediment reduction

  • Nutrient - 5%

phosphorus reduction

  • New mapping components give inputs necessary to calculate

existing load baseline and tell us where we need to implement reductions

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

What’s our Baseline? It Depends…

  • The quick and dirty…
  • Derry Township has 10,540 acres defined as Urban Area
  • 25%

defined as Impervious (2,626 acres)

  • 75%

defined as Pervious (7,878 acres)

  • The rest of Derry Township has 4,180 acres
  • 18%

defined as Impervious (752 acres)

  • 82%

defined as Pervious (3,428 acres)

  • Loading rate for Dauphin County
  • Impervious Developed (S

ediment): 1,999.14 lbs/ acre/ yr

  • Pervious Developed (S

ediment): 299.62 lbs/ acre/ yr

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Let’s Do S

  • me Math

IMPERVIOUS

2,626 acres UA x 1,999.14 lbs/ acre/ yr =

5,249,742 lbs/yr

752 acres UA x 1,999.14 lbs/ acre/ yr =

1,503,353 lbs/yr

PERVIOUS TOTAL

7,878 acres UA x 299.62 lbs/ acre/ yr =

2,360,406 lbs/yr

3,428 acres UA x 299.62 lbs/ acre/ yr =

1,027,097 lbs/yr 7,610,148 lbs/yr 2,530,450 lbs/yr

10,140,598 lbs/yr

Is this our number? ? ?

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

What’s our Baseline? It Depends…

  • Our MS

4 baseline – not so quick and dirty…

  • Defined as our “ Planning Area”
  • 1. Within the boundaries of your municipality; and
  • 2. Within your MS

4-regulated storm sewershed; and

  • 3. Within your Urbanized Area and/ or Upstream of your Urbanized Area
  • To meet the MS

4 requirements, only the planning areas matter

  • Therefore, we must focus our required reductions in these areas
  • For overall environmental quality, non-planning areas still matter
  • We need a completed infrastructure map to do this analysis
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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

What Can Be Excluded From the Planning Area?

  • Area outside the MS

4-regulated storm sewershed

  • Area downstream of the Urbanized Area
  • Area within the MS

4-required planning area, but has a stormwater permit

  • NPDES

Industrial permits

  • Non-municipal MS

4s

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

What’s our Baseline?

  • Once we determine our MS

4 planning area we calculate pollutant loads similar to our simplified example

  • This is our baseline with a caveat…
  • We can reduce the baseline within our MS

4 planning area based on existing BMPs (BMPs in place as of the PRP reporting date)

  • Previous guidance from DEP indicated reductions might only come from

more recent BMPs

  • Current guidance says ALL existing BMPs can be used…

with some caveats

  • BMP has to be functioning (up-to-date O&M)
  • BMP must be documented in permit application (Need performance information)
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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Calculating the Final Baseline

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Final Baseline Established – Next S teps

  • Need to group storm sewersheds into those draining into impaired

waters and those that don’ t drain into impaired waters

  • Derry Township has three Appendix E impairments (need PRPs)
  • Unnamed Tributaries to S

watara Creek - S iltation

  • S

pring Creek - S iltation

  • Iron Run – S

iltation

  • A PRP will need to be developed for each of these local

impairments

  • We will be required to reduce sediment by 10%

in storm sewersheds contributing to each of these impaired waters

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Final Baseline Established – Next S teps

  • In addition to our local impaired waters, we need to address our Chesapeake

Bay Pollution Reduction Plan (CBPRP –Appendix D)

  • This requires us to reduce sediment by 10%

, phosphorus by 5% , and nitrogen by 3%

  • DEP has an agreement with EP

A that if we reduce sediment by 10% then we also have reduced phosphorus and nitrogen by at least 5% and 3% , respectively. Basically, we need to reduce sediment by 10% to be in compliance.

  • The 10%

for the local PRPs is calculated from only those sewersheds contributing to the impaired water

  • S

ince our entire Township is in the Chesapeake Bay Watershed, we calculate the 10% needed to meet the CBPRP from ALL MS 4 storm sewersheds

  • Any reductions used to meet the local PRPs can be subtracted from the CBPRP

reduction goal

  • BMPs to address the needed CBPRP reductions can be placed in any of the MS

4 storm sewersheds

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

2018 MS 4 Permit

  • PRP/ CBPRP must be developed and included in NOI next

S eptember 16, 2017

  • PRP/ CBPRP must be posted for public comment a minimum of 45

days prior to the NOI date. Therefore, the PRP must be posted no later than August 3, 2017.

  • ***S

tructural BMPs proposed to meet impairment reductions must be identified on the mapping included in the PRP and NOI.***

  • We must implement all proposed improvements within the next

permit timeframe – March 2018 – 2023

  • How do we accomplish all of this?

...

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Connecting MS 4 to Our Credit Policy

  • The Credit Policy isn’ t solely for MS

4 compliance, but it does help turn the gears of pollution reduction activities

  • Therefore, development of specific

policies should keep this goal in mind

  • In the end, MS

4 compliance will take us a long way towards improved system performance and improved community water quality

Credit Policy PRP CBPRP

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

DTMA ’s Credit Policy

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

DTMA ’s Credit Policy – Obj ectives Revisit ed

A. S timulate interest in making certain types of stormwater improvements – Incent ivize pref erred solut ions B. Ensure improvements undertaken result in a long term cost reduction impact

  • n the system – Incent ivized act ivit ies can’t burden t he program f inancially
  • r in t erms of resources

C. Improve Water Quality, Reduce Volume and Rate of Runoff – Pollut ion Reduct ion Plan Requirement s D. Public Education and Awareness – Need t o move beyond j ust sat isf ying permit requirement s E. Positive Change in Thinking and Behavior – Need t o address t his on all levels including homeowners, developers, communit y planning, et c. F. Data Gathering – S ignif icant port ions of our inf rast ruct ure (bot h public and privat e) are not well document ed or document at ion is scat t ered

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

What S hould Our Credit Policy Achieve?

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

All Credits are not Created Equal

S tructural

  • Rat e Cont rols
  • Constructed Wetland
  • Retention Basins
  • Detention Basins
  • Volume Cont rols
  • Pervious Pavement
  • Infiltration Basin/ Trench
  • Rain Gardens/ Bio-

Infiltration

  • Wat er Qualit y
  • Constructed Wetland
  • Vegetated S

wale/ Filter

Non-S tructural

  • Tree Canopy Cover
  • Downspout Disconnect ion
  • Exist ing Permit Holders
  • MS

4

  • NPDES
  • S
  • il Fert ilit y Test ing/ Fert ilizer

Management

  • S

ept ic Tank Pumping

Education/ Outreach

  • S

chool Curriculum

  • Public Workshops
  • S

t ream Clean up

  • Inlet Badging/ S

ignage

  • Riparian Buffer Plant ing

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

What are the Benefits to DTMA?

  • MS

4 Permit Needs:

  • Increased BMP documentation
  • Pollution Reduction Plans
  • Local Impaired Waters
  • Chesapeake Bay
  • Education and Outreach
  • Long Term O&M:
  • S

tormwater infrastructure assets will be owned by DTMA

  • Credits can help incentivize improvements and best practices
  • Wat er Qualit y
  • Credit Policy can help DTMA gather data needed to make informed decisions on

how to best address water quality issues

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Credit Policy S tructure

Policy needs to…

  • Provide mechanism for landowner to make improvements without

being too burdensome

  • If process is too complicated or costly, few will participate
  • Address existing practices that are providing benefit
  • Avoid burdening DTMA staff with administrative tasks and costs
  • Be robust enough to result in system improvement
  • Be rooted in clear long-term goals for system improvement

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Public Land Retrofits

Public Retrofit Reality

Total Land Public Land Available for Retrofit

Issues Affecting Public Retrofits

  • S

pace

  • S
  • ils
  • Existing S

torm S ystem Inverts

  • Conflicting Uses
  • Utilities
  • Cost
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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Private Land - Two Mechanisms for Change

CREDITS

  • Ongoing reduction to fee
  • Rewards activity
  • S

imple to implement

  • Little upfront work for DTMA
  • S

patially-random reductions

INCENTIVES

  • One-time input of money and/ or resources
  • Overcomes barriers
  • More complex to implement
  • More upfront work for DTMA
  • S

patially-focused reductions

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Barriers to Participation

  • COS

T and TIME!

  • High administ rat ive burden
  • Concerns about code compliance when applying for permit s
  • Need HOA approval
  • High perceived maint enance and uncert aint y about responsibilit y
  • Dealing wit h cont ract or t o design/ const ruct t he BMP
  • Unsure of what can be done on t heir propert y
  • Unaware of BMP benefit s or incent ive program
  • Ot hers?

? ?

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Knocking Down Barriers

  • Grants
  • Rebates
  • Awards
  • S

ite Assessment/ BMP Design Assistance

  • Cost S

haring

  • Offsite Mitigation with Tradable Credits
  • Proj ect Aggregation
  • Public-Private Partnerships
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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Example Program - Philadelphia

  • S

tormwater Fee Credit

  • S

MIP – Grants directly to property

  • wners who want to construct

retrofit proj ects – Funding up to $100,000 per treated acre

  • GARP – Provides grants to

contractors, companies or other proj ect aggregators who can build large-scale retrofit proj ects across multiple properties (>10 acres treated)

Public Projects Private Voluntary Retrofits Private Redevelopment

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Example Credit - Retrofits

  • Retrofit Existing S

tructures

  • Low hanging fruit – already have land and contributing infrastructure
  • Existing BMP is:
  • Converted into a different - more effective – BMP
  • Enhanced by increasing treatment volume and/ or hydraulic retention time
  • Restored to renew its performance
  • Please note: Y
  • u can’ t restore a NPDES

BMP because they are already required to be maintained

  • Won’ t be beneficial for all BMPs, but where applicable the cost/ benefit is

very favorable

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Three Types of Retrofits

CONVERSIONS ENHANCEMENTS RESTORATIONS No Effective Water Quality Treatment Water Quality Treatment Limited WQ Treatment (Condition) Improved Water Quality Treatment Limited WQ Treatment (Design) Improved Water Quality Treatment

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Example Credit - Retrofit

What is the limitation of this BMP?

  • All small storms are bypassed because
  • f low flow channel
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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Example Credit - Retrofit

What can be done here?

  • Low flow channel could be removed
  • S
  • ils could be amended
  • Orifice height could be adj usted

Remember O&M!!!

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Example Credit – Existing S tructural BMPs

  • Existing S

tructures

  • Must provide DTMA data – Baseline Reduction!
  • Must be Functional
  • Needs to have a O&M Agreement with DTMA
  • Provides Access to DTMA
  • Must follow DTMA Maintenance Checklist
  • Amount of credit will be determined by:
  • Type of BMP
  • The magnitude of its system performance
  • How much IA it handles
  • What’s happening downstream?

? ?

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Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Example Credit – Downspout Disconnection

  • Downspout Disconnection
  • Flow directed into lawn/ landscape,

rain garden, rain barrel, etc

  • All/ most downspouts must be

disconnected

  • Overflow/ Winter flow, when rain

barrel is present, must be disconnected too

  • Grants DTMA access rights for

inspection

  • S

imple application but fine for non- compliance and removal of credit

Things to keep in mind

  • S

hould direct flow away from structure

  • S

uggested discharge about 10 feet from building and downslope

  • Don’ t discharge into area that might

exacerbate sinkhole

  • Don’ t direct flow onto neighbor’s

property

  • Don’ t discharge onto impervious area

(ex. Driveway)

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SLIDE 33

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Rain Garden on the Cheap

Phot o credit NRCS

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SLIDE 34

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Existing NPDES and MS 4 Permit Holders

  • Holders of these permits can be excluded from Planning Area
  • Exclusion does not hold if we implement BMPs to meet our PRP

and CBPRP requirements

  • We can do BMPs on these properties, but we will then need to include them

in our baseline calculation – “ no free lunch”

  • They can still complete non-MS

4 creditable BMPs (fee credits) which will improve overall water quality

  • S

till have requirements and responsibilities associated with their specific permits

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SLIDE 35

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Outcome-Based Policy

  • Policy framework will focus on end-goals not mechanism t o meet t hose

goals

  • Will direct propert y owners t o resources t o accomplish credit able

act ivit ies

  • Innovat ion Credit –Allow propert y owners t o propose out side-t he-box

solut ions

  • May provide mechanism t o incent ivize cert ain t ypes of act ivit ies in key

locat ions or pollut ion “ hot -spot s” – Precision Conservat ion

  • Competitive grant
  • Tradeable credits
  • Cost sharing
  • Rebates
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SLIDE 36

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Non-residential Program Example

  • Non-residential, large-scale proposals could start with a simple
  • ne-page “ concept proposal” .
  • This would be a brief narrative discussing the general idea of the proj ect

including approximate treated area and proposed BMP location

  • Would not include actual concept design plans
  • DTMA would review proposal and meet with the property owner.
  • DTMA could provide upfront concept design assistance.
  • DTMA could provide overall proj ect assistance to lessen the gap

between the cost of the proj ect and the financial benefit of the property owner (help make it financially feasible).

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SLIDE 37

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Residential Program Example

  • Process starts with a simple credit application or grant application
  • For the credit application, property owner would complete appropriate

form and submit showing what BMP they have in place

  • DTMA would review and assign appropriate credit to fee
  • For the grant application, it would be similar to non-residential
  • Property owner submits a very basic concept idea to DTMA
  • Concept can be based on any practical solution, but DTMA would provide a list
  • f common BMPs and their effectiveness values to help homeowner calculate

potential benefit and proj ect cost

  • DTMA would review and provide feedback, verify cost estimate, and determine

appropriate grant funding amount

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SLIDE 38

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

New Development Example

  • Incentivize preferred practices on new proj ects by offering an

upfront credit application process.

  • Benefits property owner because cheaper to implement during design and

construction than to retrofit later

  • Limits the impact to our stormwater system by addressing concerns before

they happen

  • Could be incorporated into early site planning meetings/ approvals
  • Important to remember new BMPs associated with future

development (new IA) will not apply to pollution reduction goals if they only address regulatory needs of the land development process

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SLIDE 39

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Final Thoughts on Changing Our Mindset

  • Where can we work stormwater into our existing daily functions?
  • Building permit – Can a fact sheet or suggestion sheet be included so people

can think about stormwater changes while they’ re conducting other property changes?

  • Commercial/ Industry Upgrades – Early stage proj ect planning: Where can

stormwater fit into the discussion?

  • Ordinance changes
  • Opportunity for retrofitting older infrastructure
  • Focus on water as a resource not a waste
  • S

tormwater needs to be evaluated like other site costs such as electricity, water use, etc.

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SLIDE 40

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Mike Callahan – S tormwater Program Coordinator

mcallahan@ dtma.com

Pro viding a c o st e ffe c tive pub lic se rvic e to pro te c t a nd e nha nc e the wa te re nviro nme nta nd q ua lity o f life fo ro urlo c a la nd re g io nalc o mmunity

RE L I ABL Y RE S PONS I VE L Y PROF E S S I ONAL L Y

Upcoming Meeting Schedule

Wednesday, November 2nd Wednesday, December 7th