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The Urban Connection:NPDES and Storm Water in the
State of Delaware
Sandra M. Goodrow, Ph.D., C.F.M.Environmental Scientist IVSurface Water Discharge Section
Presented at the Third Annual DEAWRA SymposiumNovember 19th, 2013
Overview of NPDES Programs National Pollutant Discharge
Elimination System
A system of regulating point sources of pollution to surface waters
Typical point sources include treated process water discharges from industry What is a
permit?
A. An agreement
B. A license
C. A stick
D. All of the above
NPDES Storm Water Program Phase I 1990
Industrial
11 Categories, including construction
Large and Medium MS4s Medium: Population of 10,000-
249,999
Large: Population of 250,000 or more
Phase II 1998
Small MS4s in Urban Areas
So, is it the population or…..
Stormwater is the Urban Connection
“We have met the enemy- imperviousness”
(Tom Shueller, Center for Watershed Protection)
Linking Land Use to Water Quality
Stormwater is the Urban Connection
What is Urban?Higher Population Density
May be cities, towns or sprawl
The Bureau of Census Released its 2010 Census in late 2011 Some communities in Delaware that
were not currently regulated grew in population, so that they now require permit coverage
“Urban Area”
Phase I 1990 Large and Medium MS4s Industrial Facilities Intended to cover the larger source
contributorsPhase 2 1999 Small MS4s in “Urban Areas” Intended to more fully cover the urban
contribution
Industrial Storm Water Program Standard Industrial
Classification (SIC) Codes or “Activity Code”
Examples of Sectors (or Classes) of SIC Codes:
Sector D: Asphalt Paving
Sector J: Mineral Mining
Sector M: Automobile Salvage Yards
Sector P: Land Transportation and Warehousing
Provisions Under the Industrial Storm Water Program Limits on Eligibility to Discharge (e.g.
TMDLs) “No Exposure” Certification SWPP/SWMP/SWPP&MP
Maps, drainage, outfalls, training…
Effluent Monitoring Specific to SIC Code
Inspections
Currently, DE holds permits for 362 Active Facilities 103 of these are
No Exposure Certified
The Industrial Storm Water Regulations are currently being revised.
Current MS4s in Delaware Phase I (Issued May 7, 2013)
New Castle County
DelDOT
Towns of Bellefonte, Elsmere and Newport
Cities of Delaware City, New Castle and Wilmington
Phase II (Issued ~2003) City of Newark
Town of Middletown
Kent County DelDOT
City of Dover
Provisions of the MS4 Program Intent
Authorized Discharges
6 Minimum Components
1. Public Education and Outreach
2. Public Involvement and Participation
3. Illicit Discharge, Detection and Elimination
4. Construction Site Stormwater Runoff Control
5. Post-Construction Storm Water Management
6. Pollution Prevention and Good Housekeeping
For each Minimum Component:
BMPs, goals, timelines and responsible party
Provisions of the MS4 ProgramPublic Education and Outreach/Public Involvement and Participation
Proper use of fertilizers and pesticides
Public reporting of illicit discharges
Stream clean ups
Proper maintenance of BMPs
Public review of SWPP&MP
For Example:
Provisions of the MS4 ProgramIllicit Discharge, Detection and Elimination
Ordinances
Grass Clippings
Commercial Facilities
Mapping of all outfalls
Development of a program to detect and report all illicit discharges
For Example:
Provisions of the MS4 Program
Construction Site Stormwater Runoff Control
Post-Construction Storm Water Management
Requires the review and approval of Sediment and Stormwater Plans according to standards set within the current Delaware Sediment and Stormwater Regulations
Use and maintenance of BMPs
Implement and enforce a program to address post construction stormwater runoff from new development and re-development projects
Provisions of the MS4 Program
Pollution Prevention and Good Housekeeping
A plan for all facilities owned or operated by permittee
(Public Works yards, parks, composting areas…)
A street cleaning program
A program to manage snow and ice, including salt storage and alternate deicing practices
For Example:
And there could be more….
What’s NEW in the MS4 Business?
2010 National Census changes where the permits are required
New “State of Delaware Phase II MS4 General Permit” almost ready for review!
So, now comes the 2010 Census
And Delaware has grown….
Census tracts Urban Areas vs.
Urban Clusters
How the NPDES Program Relates to other programs
Watershed Implementation Plans
TMDLs Use of Green
Infrastructure
Take Home
Reducing or reversing the impact of development is the intent of so many of our watershed programs
The NPDES permit program can be used as a comprehensive guide as to how to get there
Sandra M. Goodrow, Ph.D., C.F.M.Environmental Scientist IV
Surface Water Discharge [email protected]
(302) 739-9946
