NCS000414_Approved SWMP_20230505

Final Draft Stormwater Management Plan
Town of Chapel Hill
NCS000414
.F.
Submitted to the North Carolina Department of Environmental Quality
May 5, 2023
Prepared by the
Town of Chapel Hill Public Works Department
Stormwater Management Division
405 Martin Luther King, Jr. Boulevard
Chapel Hill, NC 27514

Table of Contents
PART1:INTRODUCTION.......................................................................................................................I
PART 2: CERTIFICATION......................................................................................................................2
PART3:MS4 INFORMATION................................................................................................................3
3.1 Permitted MS4 Area...................................................................................................................3
3.2 Existing MS4 Mapping...............................................................................................................4
3.3 Receiving Waters ........................................................................................................................4
3.4 MS4 Interconnection ..................................................................................................................6
3.5 Total Maximum Daily Loads(TMDLs)....................................................................................6
3.6 Endangered and Threatened Species and Critical Habitat.....................................................8
3.7 Industrial Facility Discharges....................................................................................................8
3.8 Non-Stormwater Discharges......................................................................................................9
3.9 Target Pollutants and Sources................................................................................................. 11
PART 4: STORMWATER MANAGEMENT PROGRAM ADMINISTRATION............................13
4.1 Organizational Structure .........................................................................................................13
4.2 Program Funding and Budget.................................................................................................16
4.3 Shared Responsibility...............................................................................................................16
4.4 Co-Permittees............................................................................................................................17
4.5 Measurable Goals for Program Administration.................................................................... 17
PART 5: PUBLIC EDUCATION AND OUTREACH PROGRAM...................................................20
PART 6: PUBLIC INVOLVEMENT AND PARTICIPATION PROGRAM....................................23
PART 7: ILLICIT DISCHARGE DETECTION AND ELIMINATION PROGRAM.....................25
PART 8: CONSTRUCTION SITE RUNOFF CONTROL PROGRAM............................................28
PART 9: POST-CONSTRUCTION SITE RUNOFF CONTROL PROGRAM................................30
PART 10: POLLUTION PREVENTION AND GOOD HOUSEKEEPING PROGRAMS..............37

List of Tables
Table 1: Summary of MS4 Mapping
Table 2: Summary of MS4 Receiving Waters
Table 3: Summary of Approved TMDLs
Table 4: Summary of Federally Listed Species/Habitat Impacted by Surface Water Quality
Table 5: NPDES Stormwater Permitted Industrial Facilities
Table 6: Non-Stormwater Discharges
Table 7: Summary of Target Pollutants and Sources
Table 8: Summary of Responsible Parties
Table 9: Shared Responsibilities
Table 10: Co-Permittee Contact Information
Table 11: Program Administration BMPs
Table 12: Summary of Target Pollutants&Audiences
Table 13: Public Education and Outreach BMPs
Table 14: Public Involvement and Participation BMPs
Table 15: Illicit Discharge Detection and Elimination BMPs
Table 16: Qualifying Alternative Program Components for Construction Site Runoff Control Program
Table 17: Construction Site Runoff Control BMPs
Table 18: Qualifying Alternative Program(s)for Post-Construction Site Runoff Control Program
Table 19: Summary of Existing Post-Construction Program Elements
Table 20: Post Construction Site Runoff Control BMPs
Table 21: Pollution Prevention and Good Housekeeping BMPs
List of Figures
Figure 1: Map of Town of Chapel Hill's MS4(Corporate) and Zoning Jurisdictions
Figure 2: Organizational Chart for the Town of Chapel Hill Public Works Department
Figure 3: Map of Town of Chapel Hill's Watershed Protection District

PART 1: INTRODUCTION
The purpose of this Stormwater Management Plan(SWMP) is to establish and define the means by which
the Town of Chapel Hill will comply with its National Pollutant Discharge Elimination System(NPDES)
Municipal Separate Storm Sewer System (MS4) Permit and the applicable provisions of the Clean Water
Act to meet the federal standard of reducing pollutants in stormwater runoff to the maximum extent
practicable.
This SWMP identifies the specific elements and minimum measures that the Town of Chapel Hill will
develop, implement, enforce, evaluate and report to the North Carolina Department of Environmental
Quality (NCDEQ) Division of Energy, Minerals and Land Resources (DEMLR) in order to comply with
the MS4 Permit number NCS000414, as issued by NCDEQ. This permit covers activities associated with
the discharge of stormwater from the MS4 as owned and operated by the Town of Chapel Hill and located
within the corporate limits of the Town of Chapel Hill.
In preparing this SWMP, the Town of Chapel Hill has evaluated its MS4 and the permit requirements to
develop a comprehensive 5-year SWMP that will meet the community's needs,address local water quality
issues and provide the minimum measures necessary to comply with the permit. The SWMP will be
evaluated and updated annually to ensure that the elements and minimum measures it contains continue to
adequately provide for permit compliance and the community's needs.
Once the SWMP is approved by NCDEQ, all provisions contained and referenced in this SWMP, along
with any approved modifications of the SWMP, are incorporated by reference into the permit and become
enforceable parts of the permit. Any major changes to the approved SWMP will require resubmittal,
review, and approval by NCDEQ, and may require a new public comment period depending on the nature
of the changes.
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PART 2: CERTIFICATION
By my signature below I hereby certify,under penalty of law,that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed to assure that qualified
personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the information, the
information submitted is,to the best of my knowledge and belief,true, accurate, and complete.
I am aware that there are significant penalties for submitting false information, including the possibility of
fines and imprisonment for knowing violations.
I am also aware that the contents of this document shall become an enforceable part of the NPDES MS4
Permit, and that both the Division and the Environmental Protection Agency have NPDES MS4 Permit
compliance and enforcement authority.
❑ I am a ranking elected official.
© I am a principal executive officer for the permitted MS4.
❑ I am a duly authorized representative for the permitted MS4 and have attached the authorization made
in writing by a principal executive officer or ranking elected official which specifies me as(check one):
❑ A specific individual having overall responsibility for stormwater matters.
❑ A specific position having overall responsibility for stormwater matters.
Signature:
Print
Name: Chris Blue
Title: Interim Town Manager, Town of Chapel Hill
Signed this 5th day of May 2023.
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PART 3: MS4 INFORMATION
3.1 Permitted MS4 Area
This SWMP applies throughout the corporate limits of the Town of Chapel Hill, including all regulated
activities associated with the discharge of stormwater from the MS4. The map below(Figure 1)shows the
corporate limits of the Town of Chapel Hill as of the date of this document. The Town's zoning jurisdiction
and corporate limits may also be viewed online on the Town's Interactive Map Viewer.
Figure 1. Map of Town of Chapel Hill's MS4 (Corporate)and Zoning Jurisdictions.
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3.2 Existing MS4 Mapping
The current MS4 mapping is based on the Town's stormwater infrastructure geodatabase and includes data
for inlets, manholes,junction boxes, pipes, pipe junctions, outfalls, channels, ditches, and bridges, pond
structures, as well as difficult access structures. The Town also maintains a comprehensive streams and
waterbodies geodatabase, which is regularly updated based on field work associated with stream
determinations.
The Town's Interactive Map Viewer, available to the public online, displays general zoning, streams,
waterbodies, Jordan Lake Watershed riparian buffers, the Town's Watershed Protection District (water
supply watershed)boundary, and other data,but does not currently include stormwater infrastructure data.
Stormwater infrastructure data are currently only available to Town staff.
The Town of Chapel Hill's MS4 jurisdiction covers approximately 21.7 square miles. Starting in the late
1990s, GIS mapping of stormwater infrastructure was conducted intermittently across the jurisdiction, and
the data collection methods and quality of data varied over time. In 2016,a specific mapping standard was
established as the Town began conducting subwatershed studies with comprehensive, systematic MS4
mapping in the Booker Creek watershed. The mapping standard includes flow direction,material type and
condition, size/dimensions, as well as other attributes and photos. At this time, 19% of the Town's
jurisdictional area has been mapped using the 2016 data standard. The Town plans to complete mapping
of major outfalls and conveyances throughout the MS4 jurisdiction using the established mapping standard
within the next MS4 permit cycle (see also Part 7: Illicit Discharge Detection and Elimination below).
Table 1: Summary of Current MS4 Mapping
Percent of MS4 Area Mapped 19 %
No. of MajorOutfalls* Mapped 18** total
*An outfall is a point where the MS4 discharges from a pipe or other conveyance (e.g., a ditch) directly
into surface waters. Major outfalls are required to be mapped to meet permit requirements. A major outfall
is a 36-inch diameter pipe or discharge from a drainage area> 50-acres;and for industrial zoned areas a
12-inch diameter pipe or a drainage area> 2-acres.
**Based on current estimate of major outfalls (36 inches in diameter or greater, excluding culvert
crossings) mapped in the Lower Booker Creek, Eastwood Lake, and Cedar Fork subwatersheds of the
Booker Creek watershed using the Town's 2016 data standard. These outfalls are all surveyed and
inventoried features; however, not all outfalls have been field checked to confirm major outfall status.
3.3 Receiving Waters
The Town of Chapel Hill MS4 is located within the Cape Fear River Basin and discharges directly into
receiving waters as listed in Table 2 below. Applicable water quality standards listed below are compiled
from the following NCDEQ sources:
o Waterbody Classification Map
o Impaired Waters and TMDL Map
o Most recent NCDEQ Final 303 d List
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Table 2: Summary of MS4 Receiving Waters
303(d)Listed
Stream Index/ Water Quality Parameter(s)
Receiving Water Name AU Number Classification of Interest(2022)
Little Creek 16-41-1-15- 0.5 WS-IV;NSW Benthos
Bolin Creek(Hogan Lake 16-41-1-15-1- 0.5 b WS-V, C;NSW Benthos
Bolin Creek 16-41-1-15-1- 4 WS-IV;NSW Benthos
Jolly Branch 16-41-1-15-1-2 WS-V;NSW n/a
Tanbark Tan and Branch 16-41-1-15-1-3 WS-V, C;NSW n/a
Booker Creek Eastwood Lake 16-41-1-15-2- 1 WS-V,B;NSW Dissolved Oxygen
Booker Creek 16-41-1-15-2- 4 WS-V, C;NSW Benthos
Booker Creek 16-41-1-15-2- 5 WS-IV;NSW Benthos
Crow Branch 16-41-1-15-2-2 B;NSW n/a
Cedar Fork Creek 16-41-1-15-2-3 WS-V,B;NSW n/a
Old Field Creek 16-41-1-7 WS-V;NSW n/a
Morgan Creek 16-41-2- 5.5 a WS-IV;NSW n/a
Morgan Creek 16-41-2-(5.5)b WS-IV;NSW Benthos,
Fish Community
Wilson Creek 16-41-2-6 WS-IV;NSW n/a
Fan Branch Creek 16-41-2-6-1 WS-IV;NSW n/a
Meeting of the Waters 16-41-2-7 WS-IV;NSW n/a
Chapel Creek 16-41-2-8 WS-IV;NSW n/a
Battle Branch Source to Bolin Creek C;NSW n/a
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3.4 MS4 Interconnection
The Town of Chapel Hill MS4 is interconnected with another regulated MS4 and directly receives
stormwater from the Town of Carrboro and the University of North Carolina — Chapel Hill (UNC-CH)
MS4s, and the Town of Chapel Hill MS4 directly discharges stormwater into the Town of Carrboro MS4.
The number of interconnections entering the Town of Chapel Hill MS4 from the University of North
Carolina—Chapel Hill MS4 is two (2), as determined by analysis of GIS data from UNC-CH. These two
points are where a UNC-CH storm system conveyance(pipe or ditch) of a major outfall size (pipe greater
than or equal to 36-inches or a discharge area(DA) greater than or equal to 50 acres) directly connects to
the Town's stormwater system. This does not include places where streams cross from UNC-CH property
into the Town of Chapel Hill's jurisdiction,nor does it include sheet flow where the acreage is less than 50
acres or conveyances (pipes or ditches) that are less than 36 inches in diameter or that convey DA of less
than 50 acres.
The number of interconnections entering the Town of Chapel Hill MS4 from the Town of Carrboro MS4 is
six (6) and the number of interconnections leaving the Town of Chapel Hill MS4 into Town of Carrboro
MS4 is five(5),as determined by analysis of GIS data from Town of Carrboro.
The MS4 does interconnect with the statewide NCDOT MS4 and includes:
a. The interconnection is receiving stormwater from the NCDOT MS4. The number of
interconnections is unknown.
b. The interconnection is discharging stormwater into the NCDOT MS4. The number of
interconnections is unknown.
c. The Town of Chapel Hill MS4 mapping does not identify interconnections with the NCDOT MS4.
d. The Town of Chapel Hill MS4 mapping does not include NCDOT MS4 outfalls.
Additional comprehensive mapping within the Town's MS4 jurisdiction and further coordination with
UNC-CH, Town of Carrboro, and NCDOT about interconnections is needed. See Part 7: Illicit Discharge
Detection and Elimination below for plans to complete mapping of major outfalls and conveyances within
the next permit cycle.
3.5 Total Maximum Daily Loads(TMDLs)
The TMDL(s) listed in Table 3 below have been approved within the MS4 area, as determined by the map
and list provided on the NCDEQ Modeling&Assessment Unit web page. The table also indicates whether
the approved TMDL has a specific stormwater Waste Load Allocation (WLA) for any watershed directly
receiving discharges from the permitted MS4, and whether a Water Quality Recovery Program has been
implemented to address the WLA.
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Table 3: Summary of Approved TMDLs
Stormwater Water
Waste Load Quality
Water Body Name TMDL Pollutant(s) of Concern Allocation Recovery
(Y/N) Program
Y/N
Jordan Lake Nitrogen,Phosphorus,chlorophyll-a, N N
Turbidity,High pH
Statewide Mercury N N
Source: hgps:Hdeq.nc.gov/about/divisions/water-resources/plannin_ modeling-assessment/tmdls/draft-
and-approved-tmdls#CapeFear
There are no current Total Maximum Daily Load (TMDL) requirements to address water quality
impairments within the Town's jurisdiction as of the date of this document. However, all of Chapel Hill,
including the Town's municipal corporate limits and extraterritorial jurisdiction(ETJ), are tributary to the
Upper New Hope Arm of the Jordan Lake (which includes the New Hope Creek and Morgan Creek
tributaries to Jordan Lake).
The North Carolina Division of Water Quality (DWQ, now Division of Water Resources or DWR)
developed a TMDL for the B. Everett Jordan Reservoir (Jordan Lake) to address chlorophyll-a
impairments,and the EPA Region 4 approved the TMDL on September 20,2007. Nutrient controls are the
most common focus of management schemes for reducing excessive algal growth and chlorophyll-a
concentrations. Therefore, the Jordan Lake TMDL was written to address total nitrogen (TN) and total
phosphorus(TP)loads to the lake. North Carolina adopted mandatory Jordan Lake Rules in 2009 to reduce
the amount of nutrient pollution entering Jordan Lake. Implementation of the nutrient reduction regulations
has been delayed by the State Legislature. However, the Town has been complying annually with the
Jordan Lake Stage One Adaptive Management Program for Existing Development Requirements. The
Town identifies a retrofit opportunity for existing development within the MS4 each year and submits an
annual report to NCDWR.
Two addendums to the Jordan Lake TMDL were later developed and approved: one in 2010 to address
chlorophyll-a impairments in the Haw River(Back Creek and Cane Creek)and Upper New Hope(Morgan
Creek(University Lake)arms; and another in 2014 to address turbidity impairments within the Upper New
Hope arm(New Hope and Morgan Creek tributaries),and high pH impairments in the Haw River and Upper
New Hope(Morgan Creek)arms of the lake.
In addition, the Statewide TMDL for mercury does not require any actions by the Town of Chapel Hill
because most mercury in stormwater comes from atmospheric deposition.
For more information on draft and approved TMDLs within the Cape Fear River Basin, see
https://deq.nc.,aov/about/divisions/water-resources/plannin modeling-assessment/tmdls/draft-and-
Mroved-tmdls#CapeFear.
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3.6 Endangered and Threatened Species and Critical Habitat
Significant populations of threatened or endangered species and/or critical habitat are identified within the
regulated MS4 urbanized area. Based upon a review of the Endangered and Threatened Species and
Species of Concern by County for North Carolina Map and Listed species believed to or known to occur
in North Carolina map as provided by the U.S. Fish and Wildlife Service,the species listed in Table 4
have the potential to occur within the regulated MS4 urbanized area. Of those species listed, Table 4
summarizes the species that may be significantly impacted by the quality of surface waters within their
habitat.
Table 4. Potential Federally Listed Species/Habitat Impacted by Surface Water Quality
Scientific Name Common name Species Group Federal Listing Status
Fusconaia masoni Atlantic Pigtoe Clam Threatened
Source: USFWS Consultation Letter 04EN2000-2022-SLI-0297, Species List,November 23,2021
The Atlantic Pigtoe(Fusconaia masoni)is a freshwater mussel species native to the Atlantic Slope drainage
in Virginia,North Carolina, South Carolina, and Georgia. The species occurs in streams and rivers, and is
dependent on clean, moderately flowing water with high dissolved oxygen content. Historically, the best
populations existed in creeks and rivers with excellent water quality,where stream flows were sufficient to
maintain clean,silt-free substrates. Because this species prefers more pristine conditions,it typically occurs
in headwaters and rural watersheds. It is associated with coarse sand substrates at the downstream edge of
riffles, and less commonly occurs in cobble, silt or sand detritus mixtures (U.S. Fish and Wildlife Service.
2021. Species status assessment report for the Atlantic Pigtoe(Fusconaia masoni).Version 1.4.June,2021.
Atlanta, GA.).
A small portion of the Town of Chapel Hill's MS4 drains to a known population of the Atlantic Pigtoe that
has been documented within the New Hope Creek watershed of the Cape Fear River Basin.
3.7 Industrial Facility Discharges
The Town of Chapel Hill MS4 jurisdictional area (corporate/municipal limits) includes the following
industrial facilities which hold NPDES Industrial Stormwater Permits, as determined from the NCDE
Maps&Permit Data web page.
Table 5: NPDES Stormwater Permitted Industrial Facilities
Permit Number Facility Name(Permittee)
NCG110048 Mason Farm WWTP(Orange Water and Sewer Authority)
NCS000201* UNC-CH Hazardous Material Facility(UNC-Chapel Hill)
Source: hgps:Hdeq.nc.gov/about/divisions/energy-mineral-and-land-resources/stonnwater/stormwater-
pro romps-permit-data
*NOTE: The UNC-CHHazardous Material Facility is part of the UNC-CHMS4 jurisdiction (see NPDES
MS4 Permit#NCS000441).
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3.8 Non-Stormwater Discharges
The water quality impacts of non-stormwater discharges have been evaluated by the Town of Chapel Hill
as summarized in Table 6 below. The unpermitted non-stormwater flows listed as incidental do not
significantly impact water quality.
The Town of Chapel Hill has not evaluated residential and charity car washing and street washing for
possible significant water quality impacts.
Street washing discharges are addressed under the Pavement Management Program in Part 10 of this
SWMP. Street washing is performed with a vacuum street sweeping process that removes excess
debris/sediment/solids and reduces pollutants associated with street washing; the resulting wash water is
disposed of properly along with the other materials collected.
Wash water associated with car washing that does not contain detergents or does not discharge directly into
the MS4 is considered incidental. However, these types of non-stormwater discharges that do contain
detergents have not been evaluated by the Town of Chapel Hill to determine whether they may significantly
impact water quality. To mitigate impacts from car washing, the Town utilizes Public Education and
Outreach,IDDE,and Pollution Prevention and Good Housekeeping BMPs to educate residents,commercial
businesses, and municipal staff on the possible effects of detergents entering the surface waters.
The Division has not required that other non-stormwater flows be specifically controlled by the Town of
Chapel Hill.
In addition, the Town of Chapel Hill has evaluated other non-stormwater discharges, including water line
and fire hydrant flushing, air conditioning condensate, and dechlorinated swimming pool discharges, and
has determined that these activities may possibly significantly impact water quality. Below is a summary
of the Town's evaluation of these activities and the actions taken to prevent these discharges from
significantly impacting water quality. Town staff periodically review allowable non-stormwater discharges
in the IDDE Ordinance to assess whether they have potential to significantly impact water quality or cause
or contribute to a violation of applicable water quality standards. If so, they are regulated as an illicit
discharge.
The Orange Water and Sewer Authority(OWASA)updated their Sewer Use Ordinance on January 9,2020,
to allow for discharge from dumpster pads, elevator sumps, pool filter backwash, and condensate from
commercial HVAC systems into the sanitary sewer system if the discharge meets the requirements of the
ordinance (i.e., does not damage the collection system or interfere with treatment). Formal review and
approval by OWASA are required before these discharges may be conveyed to the sanitary sewer system.
Pool Discharge& Backwash
Discharges from swimming pool back-washing,pool discharges that have not been dechlorinated,
and saltwater pool discharges are all non-stormwater discharges with the potential to significantly
contribute pollutants to the Town's MS4 and waters of the State.
A report of toxicity at one of the Town's benthic monitoring sites in 2015 prompted an investigation
into the source of the toxicity,and it was discovered that an outdoor swimming pool at an apartment
complex was directly discharging chlorinated pool water and backwash directly into a stream. In
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2016,specific conductivity readings obtained by Town staff at several different outfalls that receive
swimming pool filter backwash far exceeded 1000uS/cm, indicating that pool backwash was
causing potentially significant water quality issues. As a result,the Town's IDDE Ordinance was
drafted and approved to allow discharges from dechlorinated swimming pools only, and to
specifically prohibit pool filter backwash discharge or saltwater pool discharge.
The Town has a working relationship with the Orange Water and Sewer Authority (OWASA)
regarding pool discharge allowances. Additionally, pool permits are reviewed by Town staff to
ensure that pool discharges do not significantly impact water quality standards. New pool owners
receive a Pool Maintenance brochure that provides information on the IDDE Ordinance and best
practices.
Previously permitted pool discharges are also occasionally discovered during field work for stream
determinations. If direct discharge to streams is observed, property owners are notified and
required to redirect pool backwash discharge to sanitary sewer if possible;if not possible,the Town
works with the property owner on alternatives,such as installing a non-discharge cartridge system.
Commercial Air Conditioning Condensate
Scientific research has identified wastewater discharges produced from air conditioning cleaning
operations to have high concentration of heavy metals and other pollutant of concern to water
quality. Heating, Ventilation, and Air Conditioning (HVAC) companies clean the metal
condensation coils and fins of air conditioning units for maintenance and efficiency purposes.
Though the Town's IDDE Ordinance lists commercial AC condensate as an allowed activity, the
Town of Chapel Hill prohibits the discharge of HVAC condensate from commercial operations into
the Town's MS4 due to its potential to significantly impact water quality. To comply with this
requirement, proposed new commercial developments are required to plumb the HVAC unit to
sanitary sewer after a plumbing plan has been reviewed and approved by OWASA. Existing
commercial buildings with the potential to discharge HVAC condensate into Town's MS4 are
provided education about the impact of the HVAC condensate on surface water quality and given
some time to plumb the unit to sanitary sewer. Commercial cleaning companies are also required
to contain, collect, and properly dispose of their waste into the sanitary sewer system.
Water Line Flushing
To maintain drinking water distribution systems and fire hydrants and to ensure the quality of
drinking water being distributed, many activities are conducted that result in the discharge of
chlorinated and super-chlorinated water.Activities such as fire hydrant flushing,water line pressure
testing and maintenance, water line flushing, and other distribution system discharges release
super-chlorinated water into surface water. Super-chlorinated water (i.e., water with chlorine
concentrations above 4 mg/1)discharge into surface water is toxic to aquatic life.
The Towns of Chapel Hill and Carrboro and UNC-CH have all worked with OWASA to prevent
the discharge of super-chlorinated water during water line and fire hydrant flushing. OWASA has
procedures in place to dechlorinate during water line flushing. Using dechlorination tablets, the
super-chlorinated/chlorinated water is dechlorinated to 0.1 mg/l total residue chlorine or less prior
to discharge to surface waters or the Town's MS4.
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Other Prohibited Discharges
Stormwater Management staff have also identified area drains in covered parking lots and elevator
sump pumps that drain to the storm sewer system as sources of pollution and have prohibited
installation of these types of drains on new and redevelopment projects.
Table 6: Non-Stormwater Discharges
Non-Stormwater Discharge Water Quality
Impacts
Water line and fire hydrant flushing Possible
Landscape irrigation Incidental
Diverted stream flows Incidental
Rising groundwater Incidental
Uncontaminated groundwater infiltration Incidental
Uncontaminated pumped groundwater Incidental
Uncontaminated potable water sources Incidental
Foundation drains Incidental
Air conditioning condensate Possible
Irrigation waters Incidental
Springs Incidental
Water from crawls ace pumps Incidental
Footing drains Incidental
Lawn watering Incidental
Residential and charity car washing Possible
Flows from riparian habitats and wetlands Incidental
Dechlorinated swimming pool discharges Incidental
Street wash water Possible
Flows from firefighting activities Incidental
3.9 Target Pollutants and Sources
In addition to those target pollutants identified above,the Town of Chapel Hill is aware of other significant
water quality issues within the permitted MS4 area.
Table 7 (below) summarizes the water quality pollutants identified throughout Part 3 of this SWMP, the
likely activities/sources/targeted audiences attributed to each pollutant and identifies the associated SWMP
program(s)that address each. In addition,the Town of Chapel Hill has evaluated schools,homeowners and
businesses as target audiences that are likely to have significant stormwater impacts. See below for more
information about the identified target audiences, which are based on citizen reports, staff investigations,
land use data and other information sources.
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Table 7: Summary of Target Pollutants and Sources
Target Pollutant(s) Likely Source(s)/Target SWMP Program Addressing Target
Audiences Pollutant(s)/Audience(s
Sediment Construction Construction Site Runoff
IDDE
Oil and Grease Commercial,Residents, Public Education& Outreach
Municipal Employees IDDE
Pollution Prevention&Good Housekeeping
Residential&Charity Commercial,Residents, Public Education& Outreach
Car Washing Municipal Employees IDDE
Pollution Prevention&Good Housekeeping
Trash Commercial,Residents, Public Education& Outreach
Municipal Employees, Public Involvement&Participation
Construction IDDE
Pollution Prevention&Good Housekeeping
Yard Trimmings Commercial,Residents, Public Education& Outreach
Municipal Employees Pollution Prevention&Good Housekeeping
Pet Waste Residents Public Education& Outreach
IDDE
Proper Waste Disposal Commercial,Residents, Public Education& Outreach
Municipal Employees, IDDE
Construction Pollution Prevention&Good Housekeeping
Street Wash Water Residents,Municipal Public Education& Outreach
Employees,Construction IDDE
Construction Site Runoff
Pollution Prevention&Good Housekeeping
Sewage Commercial,Residents, Public Education& Outreach
Municipal Employees IDDE
Pollution Prevention&Good Housekeeping
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The following are general descriptions of the target audiences listed in Table 7 above:
• Residents: Residential land use is approximately 64%of the Town's jurisdiction.Examples of
sub-audiences in this category includes the following audiences:
Homeowner's Associations(HOAs)and Homeowners: Homeowners are likely to care for
a home and property,engaging in yard care,trash disposal,pet ownership,car maintenance,
septic system or private sanitary sewer maintenance, and/or reporting pollution. HOAs
manage contracts for landscaping and SCM maintenance.
Single-Family Home Renters: Renters also engage in yard care, trash disposal, pet
ownership,car maintenance, and/or reporting pollution.
Multi-Family Residential Communities: The Town has a significant population of
university students who live in apartments. Educating residents of these complexes about
pet waste, litter, and proper waste disposal can be beneficial to water quality. The Town
works with property managers to help reach this audience.
Pet Owners: Pet waste pollution is more preventable when the public is informed about the
threat it causes to water quality.
School-Aged Children: This target audience has the greatest potential for growing up to
be good watershed stewards and influencing the behavior of adults. The Town maintains
a youth education program and partners with local schools to deliver information and
hands-on experiences that are aligned with the North Carolina Course of Study.
• Construction: This target audience has the greatest potential for affecting erosion and
sedimentation control at construction sites,which can be a significant contributor of sediment
to the Town's waterways. This industry also has the greatest potential for improper disposal
of waste materials such as trash,paint, and concrete.
• Commercial: This target audience includes restaurants, landscapers, paint stores/paint
contractors,mobile/power washing companies,auto service and other local businesses that can
benefit from knowledge of BMPs to prevent pollution that are specific to their business
activities.
• Municipal Employees: Town staff engage in a variety of activities in Town facilities that can
impact water quality. Examples include landscaping, vehicle washing, hazardous waste
disposal, and pollution reporting.
PART 4: STORMWATER MANAGEMENT PROGRAM ADMINISTRATION
4.1 Organizational Structure
The Town of Chapel Hill MS4 program is primarily administered by the Public Works Department with
some SWMP components implemented by the Parks and Recreation Department and the Fire Department.
The Orange County Planning & Inspections Department serves as the delegated authority for the
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
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Construction Site Runoff Control program. See the Public Works organizational chart (Figure 2) and
summary of responsible parties(Table 8)below.
Figure 2. Organizational Chart for the Town of Chapel Hill Public Works Department.
Public Works Department
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Table 8: Summary of Responsible Parties
SWMP Component Responsible Position(s) Staff Name(s) Department
Stormwater Program Manager of Engineering&Infrastructure Chris Roberts Public Works Department
Administration
SWMP Management Stormwater Analyst Allison Weakley Public Works-Stormwater
Management Division
Public Education& Community Education Coordinator Sammy Bauer Public Works—Stormwater
Outreach Stormwater Analyst Allison Weakley Management Division
Stormwater Specialist Jason Salat
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Town of Chapel Hill
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SWMP Component Responsible Position(s) Staff Name(s) Department
Public Involvement& Senior Engineer Sue Burke Public Works—Stormwater
Participation Community Education Coordinator Sammy Bauer Management Division
Illicit Discharge Detection Stormwater Analyst Allison Weakley Public Works—Stormwater
&Elimination Stormwater Specialist Jason Salat Management Division
Construction Site Runoff Orange County Deputy Director Patrick R.Mallett Orange County Planning&
Control Development Services Inspections Department
Senior Engineer Ernest Odei-Larbi
Post-Construction Public Works—Stormwater
Stormwater Management Engineer III Joao Pereira Management Division
Engineer I1 Zach Strickland
Pollution Prevention/Good Senior Engineer Ernest Odei-Larbi Public Works—Stormwater
Housekeeping for Community Education Coordinator Sammy Bauer Management Division
Municipal Operations Stormwater Specialist Jason Salat
Municipal Facilities Public Works—Facilities
Operation&Maintenance Facilities Manager Mack Howell Management
Program
Spill Response Program Manager of Engineering&Infrastructure Chris Roberts Public Works Department
Assistant Chief Administration Stacy Graves Fire Department
MS4 Operation& Senior Engineer Sue Burke Public Works—Stormwater
Maintenance Program Stormwater Maintenance Supervisor Perry Mitchell Management Division
Municipal Stormwater Senior Engineer Ernest Odei-Larbi
Control Measure(SCM) Public Works—Stormwater
Operation&Maintenance Engineer III Joao Pereira Management Division
Program Engineer II Zach Strickland
Pesticide,Herbicide& Senior Manager of Planning&Park Kevin Robinson
Fertilizer Management Operations Parks&Recreation
Program Department
Park Maintenance Superintendent Tanner Thompson
Vehicle Equipment
Maintenance&Cleaning Assistant Chief Administration Stacy Graves Fire Department
Program*
Streets&Construction Services Mike Wright
Superintendent
Pavement Management Public Works Department
Program Streets Supervisor Greg Ling
Stormwater Maintenance Supervisor Perry Mitchell
Total Maximum Daily
Load(TMDL) Manager of Engineering&Infrastructure Chris Roberts Public Works Department
Requirements
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Town of Chapel Hill
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*The Town Operations Center(Public Works Fleet Maintenance & Transit) is located outside of the MS4
permit jurisdiction and is covered by NPDES Permit#NCG080800.
4.2 Program Funding and Budget
In accordance with the issued permit,the Town of Chapel Hill shall maintain adequate funding and staffing
to implement and manage the provisions of the SWMP and comply with the requirements of the NPDES
MS4 Permit. The budget includes the permit administering and compliance fee, which is billed by the
Division annually.
The Town of Chapel Hill Stormwater Management Program is funded through a stormwater utility fee with
a FY22 budget of$3,009,005. The current budget includes the following breakdown of funding per overall
program:
Program Element FY22 Budget Percentage Of Total
Budget
Street Sweeping $325,676 11%
Regulatory Compliance $1,062,292 35%
Infrastructure $1,621,532 54%
TOTAL BUDGET $3,009,500 100%
The Stormwater Management Program budget includes personnel costs, NPDES permit compliance,
subwatershed studies,infrastructure maintenance,and capital improvement projects.
The utility fee for each property within the Town's MS4 is determined by the amount of impervious area
within the parcel. A fee of $34.97 per year is charged for every 1,000 square feet or portion thereof
(Equivalent Rate Unit — ERU) of impervious surface for single family and most commercial properties.
These fees are billed on the annual County Property Tax Assessment. Information about the Town's
stormwater utility fee is located at:
https://www.townofchgpelhill.org/govermnent/departments-services/public-works/stonnwater-
management/stormwater-management-utility.
The following staff/funding gaps have been identified and will be included in a more complete fiscal gap
analysis and business plan to address these needs over the next permit cycle (see Program Administration
BMP#3 below):
• Major outfall mapping and data collection,
• Dry weather screening,dependent on completion of major outfall mapping, and
• SCM inspections&maintenance on Town-owned properties.
4.3 Shared Responsibility
The Town of Chapel Hill will share the responsibility to implement the following minimum control
measures,which are at least as stringent as the corresponding NPDES MS4 Permit requirement. The Town
of Chapel Hill remains responsible for compliance if the other entity fails to perform the permit obligation
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and may be subject to enforcement action if neither the Town of Chapel Hill nor the other entity fully
performs the permit obligation.
Table 9 below summarizes who will be implementing the component, what the component program is
called,the specific SWMP BMP or permit requirement that is being met by the shared responsibility, and
whether or not a legal agreement to share responsibility is in place.
Table 9: Shared Responsibilities
SWMP BMP or Legal
Permit Requirement Implementing Entity& Program Name Agreement
Y/N
Permit Section 3.5 Orange County Erosion& Sedimentation Control Program Y
Permit Sections 3.2.2 &3.2.4 1 Clean Water Education Partnership CWEP Y
4.4 Co-Permittees
The are no other entities applying for co-permittee status under the NPDES MS4 permit number
NCS000414 for the Town of Chapel Hill.
Table 10: Co-Permittee Contact Information
Co-Permittee MS4 Contact Person Phone&E-Mail Interlocal Agreement
Name (Y/N)
N/A
4.5 Measurable Goals for Program Administration
The Town of Chapel Hill will manage and report the following Best Management Practices(BMPs)for
the administration of the Stormwater Management Program.
Table 11: Program Administration BMPs
Permit 2.1.2 Program Implementation
Ref. Measures to evaluate the performance and effectiveness of the SWMP program components at least annually.
Results shall be used by the permittee to modify the program components as necessary to accomplish the intent
of the Stormwater Program.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
1. Annual Self-Assessment
Evaluate the performance and 1.Prepare,conduct and 1.Annually,Permit 1.Yes/No
effectiveness of the program document an annual Years 1 —5
components at least annually.Results evaluation of the
shall be used to modify the program program components.
components as necessary to accomplish
the intent of the Stormwater Program.
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Table 11: Program Administration BMPs
Permit 1.6: Permit Renewal Application
Ref. Measures to submit a permit renewal application no later than 180 days prior to the expiration date of the
NPDES MS4 permit.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
2. Permit Renewal Application
Submit a permit renewal application 1. Draft SWMP 1. Permit Year 5 1.Yes/No
and Draft SWMP no later than 180 applicable to the
prior to permit expiration. proceeding 5 years
following permit re-
issuance.
2. Certify the 2.Permit Year 5 2. Date of permit
stormwater permit renewal application
renewal application submittal
(Permit renewal
application form and
Draft SWMP for the
next 5-year permit
cycle)and submit to
NCDEQ at least 180
days prior to permit
expiration.
Permit 2.1.1: Adequate Funding and Staffing
Ref. The permittee shall maintain adequate funding and staffing to implement and manage the provisions of the
SWMP and meet all requirements of thispen-nit.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
3. Adequate Funding and Staffing
Perform a fiscal analysis and explore 1. Complete a 1. Permit Year 1 1. Adequate/Inadequate
options to obtain adequate program documented fiscal gap
funding to fully fund the stormwater analysis to ensure the
program and meet all requirements of program maintains
the permit. Select and implement a adequate funding and
funding strategy for the Phase II staffing.
Stormwater Program.
2.Determine available 2.Permit Year 1 2.Yes/No/Status
funding mechanisms
and evaluate options.
3. Select a funding 3.Permit Year 1 3.Yes/No/Status
mechanism.
4.Implement funding 4.Permit Years 2-5 4.Yes/No/Status
mechanism.
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Table 11: Program Administration BMPs
Permit 2.2.2: Written Procedures
Ref, The Permittee shall maintain, and make available to the Division upon request,written procedures for
im leme ing the six minimum control measures.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
4. Maintain Written Procedures
Create and maintain written procedures 1.Create written 1.Permit Year 1 1.Yes/No/Status
that identify specific action steps, procedures for all
schedules,resources,and MCMs.
responsibilities for implementing the 2.Review written 2.Permit Years 2-5 2.Yes/No/Status
Minimum Control Measures(MCMs). procedures for all
MCMs and update as
needed.
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PART 5: PUBLIC EDUCATION AND OUTREACH PROGRAM
The Town of Chapel Hill will implement a Public Education and Outreach Program to distribute educational
materials to the community or conduct equivalent outreach activities about the impacts of stormwater
discharges on water bodies and steps the public can take to reduce pollutants in stormwater runoff.
The target audiences and identified pollutants listed in Part 3.9 of this SWMP,which will be addressed by
the Public Education and Outreach Program, are summarized in Table 12 below. In addition,the Town of
Chapel Hill is required to inform businesses and the general public of the hazards associated with illicit
discharges,illegal dumping, and improper disposal of waste.
The Town of Chapel Hill has also partnered with the Clean Water Education Partnership (CWEP) to
implement public education and outreach. CWEP provides television commercials and radio
advertising, movie theater ads, newspaper and print ads, brochures and flyers, curriculum guides for
schools, direct education, and promotional items with a logo.
Table 12: Summary of Target Pollutants&Audiences
Target Pollutants Likely Source s /Tar et Audience(s)
Sediment Construction
Oil&Grease Commercial,Residents,Municipal Employees
Residential&Charity Car Commercial,Residents,Municipal Employees
Washing
Trash Commercial,Residents,Municipal Employees, Construction
Yard Trimmings Commercial,Residents,Municipal Employees
Pet Waste Residents
Proper Waste Disposal Commercial,Residents, Municipal Employees, Construction
Street Wash Water Residents,Municipal Employees, Construction
Sewage Commercial,Residents, Municipal Employees
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The Town of Chapel Hill will manage, implement,and report the following public education and outreach
BMPs.
Table 13: Public Education and Outreach BMPs
Permit 3.2.2 and 3.2.4: Outreach to Targeted Audiences
Ref. Measures to identify the specific elements and implementation of a Public Education and Outreach Program to
share educational materials to the community or conduct equivalent outreach activities about the impacts of
stormwater discharges on water bodies and how the public can reduce pollutants in stormwater runoff. The
permittee shall provide educational information to identified target audiences on pollutants/sources identified in
table 12 above, and shall document the extent of exposure of each media, event or activity,including those
elements implemented locally or throu h a cooperative agree ent.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
5. Stormwater Activities
Conduct at least one activity for a 1. Select a target 1.Annually,Permit 1.Yes/No/Status
target audience that discusses audience to provide Years 1-5
pollution prevention and/or general educational information
stormwater.Examples of activities on target pollutants.
include,but are not limited to, 2.Develop or identify 2.Annually,Permit 2.Yes/No/Status
presentations,canvassing campaigns, one activity to cover Years 1-5
and targeted videos. target pollutants for the
selected target audiences.
3.Provide the activity to 3.Annually,Permit 3.Number of
the selected target Years 1-5 participants and/or
audiences. contact hours
6. Town-Sponsored Event
Continue to distribute information 1.Develop or identify 1.Annually,Permit 1.Yes/No/Status
on stormwater during at least one one interactive activity at Years 1-5
Town-sponsored event or festival a the event that addresses
year(in person or virtually). general stormwater
and/or a target pollutant
or pollutants.
2. Staff an event/festival 2.Annually,Permit 2.Name of the event,
and perform the activity. Years 1-5 number of participants
and/or contact hours
7. Partnership with Clean Water Education Partnership(CWEP)
Continue to engage with CWEP on 1.Monitor CWEP 1.Annually,Permit 1. Total audience
education and outreach efforts. activities to ensure Years 1-5 reached
Outreach mechanisms include partnership commitments
television,movie,online,and radio are met.
ads,newspaper and print ads,
handouts,promotional items,and
events.
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Town of Chapel Hill
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Table 13: Public Education and Outreach BMPs
Permit 2.1.7,3.2.3 and 3.6.5(c): Web Site
Ref. Measures to provide a web site designed to convey the program's message(s) and provide online materials
including ordinances, or other regulatory mechanisms, or a list identifying the ordinances or other regulatory
mechanisms,providing the legal authority necessary to implement and enforce the requirements of the permit
and SWMP. The web page shall also provide developers with all relevant post-construction requirements,
design standards, checklists and/or other materials.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
8. Stormwater Web Pages
Continue to maintain the stormwater 1.Maintain web pages. 1.Annually,Permit 1.Yes/No
web pages with information on Years 1-5
relevant ordinances,post- 2.Monitor engagement. 2.Annually,Permit 2.Number of web page
construction requirements,design Years 1-5 visits
standards,pollution prevention,
education and involvement, and
Orange County's household
hazardous waste disposal program.
9. Social Media Coverage
Continue to distribute pollution 1. Choose a target 1. Quarterly,Permit 1.Yes/No
prevention and general stormwater pollutant or general Years 1-5
information on the Town's Facebook stormwater information
and the Town's Stormwater to share.
Facebook accounts. 2. Share posts via social 2.Quarterly,Permit 2.Dates of posts
media. Years 1-5
Permit 3.2.5: Stormwater Hotline
Ref. Measures for a stormwater hotline/helpline for the purpose of public education and outreach.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
10. Stormwater Hotline
Maintain and promote the 919-969- 1.Maintain the 1. Continuously,Permit 1.Yes/No/Status
RAIN(7246)hotline for community stormwater hotline. Years 1-5
members to report pollution.The
hotline is advertised online and on 2.Publicize hotline in 2. Continuously,Permit 2.Yes/No Status
printed materials. developed materials and Years 1-5
on web site.
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Town of Chapel Hill
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Page 22

PART 6: PUBLIC INVOLVEMENT AND PARTICIPATION PROGRAM
This SWMP identifies the minimum elements and implementation of a Public Involvement and
Participation Program that complies with applicable State,Tribal and local public notice requirements. The
Town of Chapel Hill will manage, implement, and report the following public involvement and
participation BMPs.
Table 14: Public Involvement and Participation BMPs
Permit 3.3.1: Public Input
Ref. Mechanisms for public involvement that provide for input on stormwater issues and the stormwater program.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
11. Stormwater Management Utility Advisory Board(SMUAB)
Continue to receive feedback and 1.Attend and provide 1. Quarterly,Permit 1.Number of meetings
recommendations on the Town's staff support for SMUAB Years 1-5
stormwater program from the meetings.
Stormwater Management Utility
Advisory Board(SMUAB). The
Board's composition is residential,
business,and university. Residents
can also provide feedback at these
public meetin s.
12. Stormwater Email
Maintain 1.Publicize email in 1.Continuously,Permit 1.Yes/No/Status
stormwater(a)townofchMelhill.org to educational materials and Years 1-5
receive public input on Stormwater on web site.
programming.
Permit 3.3.2: Volunteer Opportunities
Ref. Measures to provide volunteer opportunities designed to promote ongoing citizen participation.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
13. Annual Town-Wide Cleanup Event
Organize event for community 1. Identify public area(s) 1.Annually,Permit 1.Yes/No/Status
members to pick up trash around the for cleanup event. Years 1-5
community. 2. Coordinate cleanup 2.Annually,Permit 2.Number of
event. Years 1-5 participants,estimated
tonnage or number of
bags of litter/trash
removed
Continued on next page
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Town of Chapel Hill
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Table 14: Public Involvement and Participation BMPs
14. Additional Volunteer Opportunities
Provide and promote one non- 1.Identify an 1.Annually,Permit 1.Yes/No/Status,name
cleanup opportunity for volunteers to activity/event for Years 1-5 of activity
engage with the Stormwater Program. volunteers.
2.Engage with 2.Annually,Permit 2.Number of
volunteers on selected Years 1-5 participants,volunteer
activity/event. hours logged
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Town of Chapel Hill
May 5,2023
Page 24

PART 7: ILLICIT DISCHARGE DETECTION AND ELIMINATION PROGRAM
The Town of Chapel Hill will develop, manage, implement, document, report and enforce an Illicit
Discharge Detection and Elimination Program which shall, at a minimum, include the following illicit
discharge detection and elimination BMPs.
Table 15: Illicit Discharge Detection and Elimination BMPs
Permit 3.4.1: MS4 Map
Ref. Measures to develop,update and maintain a municipal storm sewer system map including stormwater
conveyances, flow direction,major outfalls and waters of the United States receiving stormwater discharges.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
15. Updates to the MS4 Map
Continue to develop and maintain the 1.Develop process for 1.Permit Year 1 1.Yes/No/Status
MS4 map with information including collecting digital as-
existing and newly constructed built data and
stormwater conveyances,outfalls, incorporating those data
flow direction and receiving waters. into the existing map.
2.Add existing and new 2.Annually,Permit 2.Total number of major
conveyances/outfalls to Years 1-5 outfalls mapped
the map when they are
located or constructed
3. Complete mapping of 3.Permit Year 5 3.Yes/No/Status
existing major outfalls
and conveyances
Permit 3.4.2: Regulatory Mechanism
Ref. Measures to provide an IDDE ordinance or other regulatory mechanism that provides legal authority to
prohibit,detect,and eliminate illicit connections and discharges, illegal dumping and spills into the MS4,
includin enforcement procedures and actions.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
16. Maintain Adequate Legal Authority
Ensure the continued applicability, 1.Evaluate the IDDE 1.Annually,Permit 1.Yes/No/Status
accuracy,and legal standing of the Ordinance and revise as Years 1-5
IDDE provisions in the Town's Code necessary.
of Ordinances(Chapter 23,Article
V).
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Town of Chapel Hill
May 5,2023
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Table 15: Illicit Discharge Detection and Elimination BMPs
Permit 3.4.3: IDDE Plan
Ref. Measures to maintain and implement a written IDDE Plan to detect and address illicit discharges,illegal
dumping and any non-stormwater discharges identified as significant contributors of pollutants to the MS4.
The plan shall provide standard procedures and documentation to:
a) Locate priority areas likely to have illicit discharges,
b) Conduct routine dry weather outfall inspections,
c) Identify illicit discharges and trace sources,
d) Eliminate the source(s) of an illicit discharge,and
e) Evaluate and assess the IDDE Program.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
17. Maintain IDDE Plan
Maintain a written IDDE plan to 1.Maintain and 1. Continuously,Permit 1.Yes/No/Status
detect and address illicit discharges, implement the written Years 1-5
illegal dumping and non-stormwater IDDE plan.
discharges identified as significant 2. Conduct review of 2.Annually,Permit 2.Yes/No/Status
contributors of pollutants to the MS4, IDDE Plan, standard Years 1-5
including provisions for program documentation,forms,
assessment and evaluation and procedures and SOPS;
associated documents. make changes as
necessary.
18. Dry Weather Outfall Screening Inspections
Implement and maintain a program to 1. Develop plan and 1.Permit Year 1 1.Yes/No/Status
conduct and track dry weather outfall schedule to complete
inspections per the IDDE Plan to outfall mapping within
proactively identify illicit discharges the MS4 jurisdiction.
and connections. 2.Perform inspections of 2.Annually,Permit 2.Number of
20%of currently mapped Years 1-5 outfalls inspected,and%
major outfalls as of currently mapped
described in the IDDE outfalls inspected
Plan.
Permit 3.4.4: IDDE Tracking
Ref. Measures for tracking and documenting the date(s) an illicit discharge,illicit connection or illegal dumping was
observed,the results of the investigation, any follow-up of the investigation,the date the investigation was
closed,the issuance of enforcement actions,and the ability to identify chronic violators.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
Continued on next page
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Town of Chapel Hill
May 5,2023
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Table 15: Illicit Discharge Detection and Elimination BMPs
19. IDDE Tracking Database
Maintain the existing IDDE tracking 1. Track all IDDE 1. Continuously,Permit 1.Yes/No/Status
spreadsheet to track investigations investigations and Years 1-5
and document illicit discharges. document the date(s)the
illicit discharge or
Investigations are documented as connection was
they occur. Tracking records are observed;the results of
evaluated and reported annually(see the investigation;any
BMP#19 above). follow-up of the
investigation or
enforcement actions;and
the date the investigation
was closed.
2.Review IDDE 2. Annually,Permit 2. Number of
investigation reports and Years 1-5 investigations,number of
database,and identify verified illicit discharges,
chronic violators,issues, number of illicit
and/or"hot-spot"areas. discharges remedied,
number of Notices of
Violation issued,number
of chronic violators
and/or hot spots
identified
Permit 3.4.5: Staff IDDE Training
Ref. Measures to provide training for municipal staff and contractors who, as part of their normal job
responsibilities,may observe an illicit discharge, illicit connection, illegal dumping or spills. Training shall
include how to identify and report illicit discharges,illicit connections, illegal dumping and spills. Each staff
training event shall be documented,including the a enda/materials, date, and number of staff participating.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
20. Staff Training
Continue to provide annual training 1. Implement and 1.Annually,Permit 1.Number of staff
to educate Town staff about document a training Years 1-5 trained
indicators of potential illicit program for appropriate
discharges and connections and municipal staff,who,as
illegal dumping,and the appropriate part of their normal job
avenues through which to report responsibilities,may
suspected illicit discharge. come into contact with or
otherwise observe an
illicit discharge or illicit
connection to the storm
sewer system.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 27

Table 15: Illicit Discharge Detection and Elimination BMPs
Permit 3.4.6: IDDE Reporting
Ref. Measures for the public and staff to report illicit discharges, illegal dumping and spills. The mechanism shall be
publicized to facilitate reporting and shall be managed to provide rapid response by appropriately trained
ersonnel.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
21. Reporting hotline
Maintain the 919-969-RAIN(7246) 1.Maintain the 1. Continuously,Permit 1.Yes/No/Status
hotline for community members to stormwater hotline. Years 1-5
report pollution.
2. Track the number of 2.Continuously,Permit 2.Number of calls
calls received by the Years 1-5 received by the hotline to
hotline that result in report pollution,number
investigations in the of discharges remedied
IDDE Tracking because of hotline calls
Database.
PART 8: CONSTRUCTION SITE RUNOFF CONTROL PROGRAM
In accordance with 15A NCAC 02H .0153, the Town of Chapel Hill relies upon the North Carolina
Sedimentation Pollution Control Act(SPCA)of 1973 as a qualifying alternative program to meet a portion
of the NPDES MS4 Permit requirements for construction site runoff control measures. The SPCA
requirements include reducing pollutants in stormwater runoff from construction activities that result in
land disturbance of greater than or equal to one acre,and includes any construction activity that is part of a
larger common plan of development that would disturb one acre or more. The state SPCA Program is either
delegated to a city/town, delegated to a county, or implemented by NCDEQ in non-delegated areas.
The Town's Soil Erosion and Sedimentation Control Ordinance (Town Code of Ordinances Chapter 5,
Article V), was originally adopted in 1986 to address soil erosion and sedimentation control and prevent
degradation of area waterways, and was last updated in 2001. Orange County is the delegated authority to
implement and enforce the Town's Erosion and Sedimentation Control Ordinance, per an interlocal
agreement between the Town of Chapel Hill and Orange County that was last updated in September 2021.
Table 16: Qualifying Alternative Program Components for Construction Site Runoff Control Program
Reference it State or Local Program Name Autho Legal Implementing Entity
3.5.1 - Orange County Erosion Control 15A NCAC Orange County Erosion Control
3.5.4 Delegated SPCA Program* Chapter 04
* The local delegated SPCA Program ordinance(s)/regulatory mechanism(s)can be found at:
https://library.municode.com/nc/chapel hill/codes/code_of ordinances?nodeld=CO_CH5BUBURE_A
RTVSOERSECO.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 28

The Town of Chapel Hill also implements the following BMPs to meet NPDES MS4 Permit
requirements.
Table 17: Construction Site Runoff Control BMPs
Permit 3.5.6: Public Input
Ref. Measures to provide and promote a means for the public to notify the appropriate authorities of observed
erosion and sedimentation problems.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
22• Municipal Staff Training
Train municipal staff who receive 1. Train municipal staff 1.Annually,Permit 1.Number of staff
calls from the public on the protocols on proper handling of Years 1-5 trained
for referral and tracking of construction site runoff
construction site runoff control control complaints.
complaints.
23• Stormwater Hotline
Maintain and promote the 919-969- 1.Maintain the 1.Continuously,Permit 1.Yes/No/Status
RAIN(7246)hotline for community stormwater hotline. Years 1-5
members to report pollution.
2.Publicize hotline in 2. Continuously,Permit 2.Yes/No/Status
developed materials and Years 1-5
on web site.
Permit 3.5.5: Waste Management
Ref. Measures to require construction site operators to control waste such as discarded building materials, concrete
truck washout,chemicals, litter,and sanitary waste at the construction site that may cause adverse impact to
water quality.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
24. Contractor Education
Communicate waste management 1.Develop fact sheet to 1.Permit Year 3 1.Yes/No/Status
requirements to construction site share at preconstruction
operators. meetings.
2.Add fact sheet to 2.Permit Year 3 2.Yes/No/Status
website.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 29

PART 9: POST-CONSTRUCTION SITE RUNOFF CONTROL PROGRAM
This SWMP identifies the minimum elements to develop, implement and enforce a program to address
stormwater runoff from new development and redevelopment projects that disturb greater than or equal to
one acre,including projects less than one acre that are part of a larger common plan of development or sale,
that are located within the Town of Chapel Hill and discharge into the MS4. These elements are designed
to minimize water quality impacts utilizing a combination of structural Stormwater Control Measures
(SCMs) and/or non-structural BMPs appropriate for the community and ensure adequate long-term
operation and maintenance of SCMs.
In accordance with 15A NCAC 02H .0153 and .1017, the Town of Chapel Hill implements the following
State post-construction program requirements, which satisfy the NPDES Phase 11 MS4 post-construction
site runoff control requirements as Qualifying Alternative Programs (QAPs) in the MS4 area where they
are implemented. See Figure 3 below for a map that shows the boundaries of the Town's Watershed
Protection District where Water Supply Watershed (WS-IV) requirements are implemented by local
ordinance.
Table 18: Qualifying Alternative Program(s) for Post-Construction Site Runoff Control Program
State QAP Name State Requirements Local Ordinance/Regulatory
Mechanism Reference
Water Supply Watershed(WS-IV) 15A NCAC 2B Land Use Management Ordinance
.0620- .0624 LUMO Section 3.6.4
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 30

Figure 3. Map of Town of Chapel Hill's Watershed Protection District.
Watershed Protection District for Jordan Lake Reservoir
(adopted by Town Council on June 28, 1993)
Town of Chapel Hill, North Carolina
See Land Use Management Ordinance Section 3.6.4
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i ... Town of Cfiapel Hill..,- -
— T —
Town of Carrboro
�CC]VRH M
•t ���44 +
-m t a =r
^Y
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Jordan Laka Watershed protection District LakefPond pia
I..�Chapel Hill Zoning J,-diclion Intermittent Stream /
Chapel Hill Municipal(Corporate)Limlls r emnnial Stream
Roens Map crested by Iowa of Chspef Hill
Other Municipal Boundaries Starrr+water f+lar+agerrienf Division-January 3t,2023
County Boulyd.Fl s
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 31

The Town of Chapel Hill has existing requirements other than Qualifying Alternative Program(s) for
implementation of the NPDES Phase II MS4 post-construction program requirements. These existing
requirements are codified in local ordinance(s),and implementation is further defined in guidance,manuals
and/or standard operating procedure(s)as summarized in Table 19 below.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 32

Table 19: Summary of Existing Post-Construction Program Elements
Permit Requirements for Municipal Ordinance/Code Reference(s) Date Adopted
Plan Review and Approval and/or Document Title(s)
3.6.2(a)Authority 1. Land Use Management Ordinance(LUMO) 1.2 1. January 27,2003
2. LUMO 5.4.1-5.4.2 2. January27,2003
3.6.3(a)& 15A NCAC 3. LUMO 1.2,5.4.1-5.4.2 3. January 27,2003
02H.0153(c)Federal,State& 4. Flood Damage Prevention Ordinance(Code of 4. January 8,2007
Local Projects Ordinances Chapter 5 Article IV Section 5-55
3.6.3(b)Plan Review 5. LUMO 4.9,5.4.3-5.4.7 5.January 27,2003
6. Public Works Engineering Design Manual 6.January 2004
7. Zoning Compliance Permit Application 7.April 9,2020(last
updated)
3.6.3 c O&M Agreement 8. LUMO 5.4.8 8. Janua 27,2003
3.6.3 d O&M Plan 9. LUMO 5.4.8 9. January 27,2003
3.6.3(e)Deed 10. LUMO 5.4.8 10. January 27,2003
Restrictions/Covenants
3.6.3 Access Easements 11. LUMO 5.4.8 11. January 27,2003
Permit Requirements for Municipal Ordinance/Code Reference(s) Date Adopted
Inspections and and/or Document Title(s)
Enforcement
3.6.2 b Documentation 12. LUMO 5.4.8 12. Janua 27,2003
3.6.2 c Right of Entry 13. LUMO 5.4.9 13. January 27,2003
3.6.4(a)Pre-CO Inspections 14. LUMO 4.9.7 14. January 27,2003
15. Standard Zoning Compliance Permit 15. May 2020(last
Stormwater Conditions update)
3.6.4(b)Compliance with Plans 16. LUMO 4.9.7 16. January 27,2003
17. LUMO 4.6.12 17. January 27,2003
18. Standard Zoning Compliance Permit 18. May 2020(last
Stormwater Conditions update)
3.6.4(c)Annual SCM 19. LUMO 5.4.8 19. January 27,2003
Inspections 20. SCM O&M Templates 20. Jul 10,2020
3.6.4(d)Low Density 21. LUMO 4.9.7 21. January 27,2003
Inspections 22. LUMO 5.4.9 22. January 27,2003
3.6.4(e)Qualified Professional 23. SCM O&M Templates 23. July 10,2020
24. LUMO 5.4.8 24. January 27,2003
Permit Requirements for Municipal Ordinance/Code Reference(s) Date Adopted
Fecal Coliform Reduction and/or Document Title(s)
3.6.6(a)Pet Waste 25. Town Code of Ordinances Chapter 23, 25. November 14,
Article V 2016
3.6.6(b)On-Site Domestic 26. Orange County Regulations for Wastewater 26. February 26,
Wastewater Treatment Treatment and Dis osal S stems 2015
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 33

The annual reporting metrics for the post construction program are provided in Table 20:Post Construction
Site Runoff Control BMPs below.
Table 20: Post Construction Site Runoff Control BMPs
Permit 3.6.5(a),3.6.5(b),and 4.1.3: Minimum Post-Construction Reporting Requirements
Ref. Measures to document activities over the course of the fiscal year(July 1 —June 30) including appropriate
information to accurately describe ogress, status, and results.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
25. Standard Reporting
Implement standardized tracking, 1. Track number of low 1. Continuously,Permit 1.Number of plan
documentation,inspections,and density and high density Years 1-5 reviews
reporting mechanisms to compile plan reviews performed.
appropriate data for the annual self- 2. Track number of low 2.Continuously,Permit 2.Number of plan
assessment process. Data shall be density and high density Years 1-5 approvals
provided for each Post-Construction/ plans approved.
Qualifying Alternative Program 3.Maintain a current 3. Continuously,Permit 3. Summary of number
being implemented as listed in Tables inventory of low density Years 1-5 and type of SCMs added
18 and 19. projects and constructed to the inventory;and
SCMs including SCM number and acreage of
type or low density low density projects
acreage,location and last constructed
—inspection date.
4. Track number of SCM 4.Continuously,Permit 4.Number of SCM
—inspections performed. Years 1-5 inspections
5. Track number and 5.Continuously,Permit 5.Number of
type of enforcement Years 1-5 enforcement actions
actions taken. issued
Permit 2.3 and 3.6: Qualifying Alternative Program(s) (QAP)
Ref. Measures to develop, implement and enforce additional BMPs in order to comply with the QAP state program
re uirements.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
26• Watershed Protection District Program Update
Update local ordinances, SOPS,and 1.Revise Watershed 1. Permit Year 1 1.Yes/No/Status
permit processes related to current Protection District
Water Supply Watershed(WS-IV) (WPD)ordinance
rules. (LUMO 3.6.4)to comply
with 15A NCAC 02B
.0620-.0624 and NCGS
143-214.5; submit to
DEQ for review; submit
to Town Council for
adoption.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 34

Table 20: Post Construction Site Runoff Control BMPs
2.Develop internal SOPS 2. Permit Year 2 2.Yes/No/Status
for implementing and
enforcing the revised
WPD ordinance,from
project permitting
through closeout.
3. Train staff and 3.Permit Year 3 3.Yes/No/Status
implement WPD SOPS.
Permit 3.6.2: Legal Authority
Ref. Measures to maintain adequate legal authorities through ordinance or other regulatory mechanism to: (a)review
designs and proposals for new development and redevelopment to determine whether adequate stormwater
control measures will be installed, implemented,and maintained, (b)request information such as stormwater
plans, inspection reports,monitoring results, and other information deemed necessary to evaluate compliance
with the Post-Construction Stormwater Management Program, and(c) enter private property for the purpose of
inspecting at reasonable times any facilities, equipment,practices, or operations related to stormwater
discharges to determine whether there is compliance with the Post-Construction Stormwater Management
Program.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
This permit requirement is fully met by the existing post-construction program,see references provided in Table
19.
Permit 3.6.3: Plan Review and Approval
Ref. Measures to maintain plan review and approval authority, standards and procedures to: (a)Require Federal,
State, and local government projects to comply with Post-Construction Program requirements throughout the
entire MS4 permitted area,unless the entity is subject to its own NPDES MS4 permit or a qualifying alternative
program, (b)Conduct site plan reviews of all new development and redeveloped sites that disturb greater than
or equal to one acre,and sites that disturb less than one acre that are part of a larger common plan of
development or sale for compliance with 15A NCAC 02H .1017 and the qualifying alternative programs that
apply within your jurisdiction, (c)Ensure that each project has an Operation and Maintenance Agreement that
complies with 15A NCAC 02H .1050(12),(d)Ensure that each project has an Operation and Maintenance Plan
that complies with 15A NCAC 02H .1050(13), (e)Ensure that each project has recorded deed restrictions and
protective covenants,that require the project to be maintained consistent with approved plans, and(f)Ensure
that each SCM and associated maintenance accesses be protected in a permanent recorded easement per 15A
NCAC 02H 1050 9 and(10).
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
This permit requirement is fully met by the existing post-construction program,see references provided in Table
19.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 35

Table 20: Post Construction Site Runoff Control BMPs
Permit 3.6.4: Inspections and Enforcement
Ref. Measures to maintain inspection and enforcement authority, standards and procedures to: (a)Conduct post-
construction inspections prior to issuing a Certificate of Occupancy or a Temporary Certificate of Occupancy.
Alternatively,the project owner may provide a surety bond to guarantee compliance with the approved plan(s),
(b)Ensure that the project has been constructed in accordance with the approved plan(s), (c)Ensure annual
inspection of each permitted SCM to ensure compliance with the approved Operation and Maintenance
Agreement, (d)Ensure inspection of low density projects at least once during the permit term, and(e) Require
that inspections be conducted by a qualified professional.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
This permit requirement is fully met by the existing post-construction program,see references provided in Table
19.
Permit 3.6.6: Fecal Coliform Reduction
Ref. Measures to control,to the maximum extent practicable, sources of fecal coliform per 15A NCAC 02H
.1017(7). At a minimum,the program shall include: (a)A pet waste management component,which may be
achieved by revising an existing litter ordinance, and(b)An on-site domestic wastewater treatment system
component, if applicable,which may be coordinated with local county health department,to ensure proper
operation and maintenance of such systems.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
This permit requirement is fully met by the existing post-construction program,see references provided in Table
19.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 36

PART 10: POLLUTION PREVENTION AND GOOD HOUSEKEEPING PROGRAMS
This SWMP provides a comprehensive pollution prevention and good housekeeping strategy for the Town
of Chapel Hill municipal facilities and operations. Pollution prevention and good housekeeping is
accomplished through the implementation of seven required programs, which collectively address the
ultimate goal of preventing or reducing pollutant runoff from municipal operations such as parks and open
space maintenance,fleet and building maintenance,new construction and land disturbances,and municipal
storm sewer system maintenance.
Pollution prevention and good housekeeping for municipal operations includes the following programs:
1. Municipal Facilities Operation and Maintenance Program
2. Spill Response Program
3. MS4 Operation and Maintenance Program
4. Municipal SCM Operation and Maintenance Program
5. Pesticide,Herbicide and Fertilizer Management Program
6. Vehicle and Equipment Maintenance Program*
7. Pavement Management Program
*The Town's Vehicle and Equipment Maintenance Program is located outside the Town of Chapel Hill's
MS4 (Corporate) limits at 6850 Milhouse Road and has coverage under NPDES Stormwater Permit
NCG080800.
The Town of Chapel Hill will manage, implement, and report the pollution prevention and good
housekeeping BMPs as specified in Table 21 below for each required program.
Table 21: Pollution Prevention and Good Housekeeping BMPs
Permit 3.7.1: Municipal Facilities Operation and Maintenance Program
Ref. Measures to manage facilities that are owned and operated by the permittee and have the potential for generating polluted
stormwater runoff. The permittee shall maintain a current inventory of municipal facilities;perform facility inspections
and routine maintenance;establish specific frequencies,schedules,and standard documentation;provide staff training on
general stormwater awareness and imp ementing pollution prevention and good housekeeping ractices.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
27. Facility Inspections
Maintain a current inventory of 1. Identify facilities not 1.Annually,Permit 1.Number of new
municipal facilities;perform facility included in the Town's Years 1-5 facilities added to
inspections and routine maintenance; 2021 facility assessment; inventory
establish specific frequencies, add to facility inventory;
schedules,and standard develop site-specific
documentation. Stormwater Pollution
Prevention Plan
(SWPPP)for each new
facility.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 37

Table 21: Pollution Prevention and Good Housekeeping BMPs
2. Inspect all Town 2.Annually,Permit 2.Yes/No/Status,
facilities for compliance Years 1-5 Number of inspections
with each site-specific
SWPPP and correct
maintenance issues.
3.Review and update the 3.Annually,Permit 3.Yes/No/Status
inspection checklist, Years 1-5
operations and
maintenance plan for all
Town facilities.
4.Review and update 4.Annually,Permit 4.Yes/No/Status
site-specific SWPPPs for Years 1-5
all facilities.
28. Staff Training
Review,update and implement 1.Evaluate and update 1.Permit Year 1 1.Yes/No/Status
general stormwater pollution existing general and site-
prevention and site-specific facility specific training
training programs offered to Town programs.
staff. 2. Train staff to 2.Permit Years 2-5 2.Number of staff
implement the SWPPP trained
during site-specific
training.
3. Train staff on general 3.Permit Years 1-5 3.Number of staff
stormwater pollution trained
prevention.
Permit 3.7.2: Spill Response Program
Ref. Measures for facilities and operations that store and/or use materials that have the potential to contaminate stormwater
runoff if spilled. The permittee shall maintain written spill response procedures and train staff on spill response
rocedures.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
29• Spill Response Plan and Procedures
Maintain and implement a written 1.Update list of Town 1.Annually,Permit 1.Yes/No/Status
spill response procedure for all Town facilities with spill Years 1-5
facilities that store or use materials potential and review
with the potential to spill and general spill response
contaminant stormwater runoff. procedures.
2.Review and update 2.Annually,Permit 2.Yes/No/Status
site-specific spill Years 1-5
response plans for Town
facilities with potential to
roduce spills.
3.Update and revise spill 3.Annually,Permit 3.Yes/No/Status
response plans as Years 1-5
facilities operations
change.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 38

Table 21: Pollution Prevention and Good Housekeeping BMPs
30. Spill Response Training
Develop and implement spill 1.Develop spill response 1. Permit Year 1 1.Yes/No/Status
response training for appropriate training for facilities
Town staff as part of the site-specific staff.
facility training program. 2.Provide staff training 2.Permit Years 2-5 2.Number of staff
to facilities staff in spill trained
response and prevention
procedure.
Permit 3.7.3: MS4 Operation and Maintenance Program
Ref. Measures to minimize pollutants in the stormwater collection system. The permittee shall provide operation and
maintenance staff training on stormwater awareness and pollution prevention,perform MS4 inspections,maintain the
collection system including catch basins and conveyances;and establish specific frequencies,schedules,and standard
documentation.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
31. MS4 Operation and Maintenance Plan
Review and update the Town's MS4 1.Ensure the MS4 O&M 1.Annually,Permit 1.Yes/No/Status
Operation and Maintenance(O&M) Plan complies with Years 1-5
Plan. current NPDES
re ulations.
32• MS4 Inspections and Maintenance
Maintain and implement Standard 1.Review and update 1.Permit Year 1 1.Yes/No/Status
Operating Procedures(SOP)for MS4 existing SOP that
system inspections and maintenance. describes proactive and
The protocol will include specific reactive inspection
frequencies,schedules,and standard schedules,frequencies,
inspection documentation. prioritization, standard
documentation,staff
responsibilities,proper
maintenance training,
and evaluate funding
—options.
2.Perform regular 2.Permit Years 2-5 2.Number of inspections
inspections of the MS4
system in accordance
with the SOP.
3.Verify,document,and 3.Permit Years 1-5 3.Number of
prioritize maintenance maintenance activities
activities based on performed
inspections or reports
from the public.
Permit 3.7.4: Municipal SCM Operation and Maintenance Program
Ref. Measures to manage municipally-owned,operated,and/or maintained structural stormwater control measures(SCMs)that
are installed for compliance with the permittee's post-construction program. The permittee shall maintain a current
inventory of SCMs,perform SCM inspections and maintenance,and shall establish specific frequencies,schedules,and
documentation.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 39

Table 21: Pollution Prevention and Good Housekeeping BMPs
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
33. Municipal SCM Inventory
Document and maintain inventory of 1.Update inventory of 1.Annually,Permit 1.Yes/No/Status
municipally-owned structural SCMs. municipally-owned Years 1-5
structural SCMs
34. SCM Inspection and Maintenance
Perform and document regular 1.Perform SCM 1.Annually,Permit 1.Number of SCMs
inspections and maintenance of inspections following the Years 1-5 inspected
municipally-owned SCMs. Town SCM O&M Plan.
2.Perform necessary 2.Annually,Permit 2.Number of SCMs
maintenance on Town Years 1-5 maintained
SCMs.
Permit 3.7.5: Pesticide,Herbicide and Fertilizer Management Program
Ref. Measures to minimize water quality impacts from the use of landscape chemicals. The permittee shall provide routine
pollution prevention and chemical use,storage and handling training,and shall ensure compliance with permits and
a licator certifications.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
35. Pesticide,Herbicide,Fertilizer Management Program
Ensure Town staff who apply 1.Maintain applicator 1. Continuously,Permit 1.Number of pesticide
landscape chemicals are trained in certifications for Years 1-5 certificates of Town staff
pollution prevention,chemical use, appropriate Town staff and contractors
and storage and handling,to and contractors.
minimize water quality impacts from 2.Develop Town 2.Permit Year 1 2.Yes/No/Status
pesticides,herbicides,and fertilizers. pollution prevention and
chemical use,storage
and handling training
program.
3.Provide Town staff 3.Permit Years 2-5 3.Number of staff
training in pollution trained
prevention and chemical
use,storage and handling
training.
Permit 3.7.6: Vehicle and Equipment Maintenance Program
Ref. Measures to prevent and minimize contamination of stormwater runoff from areas used for municipal vehicle and
equipment maintenance and/or cleaning. The permittee shall ensure that municipal industrial facilities subject to NPDES
industrial permitting comply with those permit requirements,provide routine pollution prevention training to staff,
perform routine inspections,and establish specific frequencies,schedules,and documentation.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 40

Table 21: Pollution Prevention and Good Housekeeping BMPs
This requirement is covered under NPDES Permit NCG080800 for the Town Operations Center,which is located
outside of the Town's MS4 jurisdiction.
Permit 3.7.7: Pavement Management Program
Ref. Measures to reduce pollutants in stormwater runoff from municipally-owned streets,roads,and parking lots within the
permittee's corporate limits. The permittee shall implement measures to control litter,leaves,debris,particulate and fluid
ollutants associated with vehicles,and establish specific fre uencies, schedules,and documentation.
BMP A B C D
No. Description of BMP Measurable Goal(s) Schedule for Annual Reporting
Implementation Metric
36. Street Sweeping
Street sweeping will follow a regular 1. Conduct street 1.Permit Years 1-5 1.Number of curb miles
schedule to reduce pollutants from sweeping per MS4 O&M swept,tons of debris
Town owned and maintained streets. SOP. removed.
37. Yard Waste Collection
Periodically collect leaves and debris 1. Continue to collect 1. Seasonally,per current 1.Tons of debris
from streets,roads,and parking lots yard trimmings and loose Town procedures collected.
to reduce pollutants and clogging of leaves.
storm sewer inlets.
FINAL DRAFT NCS000414 SWMP
Town of Chapel Hill
May 5,2023
Page 41