NCS000466_Hillsborough 2021 Annual Report Narrative_20210820

Town of Hillsborough

NPDES Phase II
Stormwater Management Program

ANNUAL REPORT

Fiscal Year 2021
Stormwater Wetland at Gold Park
Town of Hillsborough Stormwater Management Program
NPDES Phase II Annual Report Fiscal Year 2021

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TABLE OF CONTENTS

INTRODUCTION ........................................................................................................ 1
1. Storm Sewer System Information ............................................................... 2
1.1 Population Served ........................................................................................ 2
1.2 Growth Rate ................................................................................................. 2
1.3 Jurisdictional Area ........................................................................................ 2
1.4 MS4 Conveyance System ............................................................................ 2
1.5 Land Use Composition ................................................................................. 2
1.6 TMDL Identification ...................................................................................... 3
2. Receiving Streams ..................................................................................... 3
3. Existing Water Quality Programs ............................................................... 3
3.1 Local Programs ............................................................................................ 3
3.2 State Programs ............................................................................................ 4
4. Permitting Information ................................................................................ 4
4.1 Responsible Party Contact List .................................................................... 4
4.2 Signing Official ............................................................................................. 4
5. Co-Permit Status Information ..................................................................... 4
6. Reliance on Another Entity ......................................................................... 5
6.1 Contact Information ...................................................................................... 5
6.2 Legal Agreement .......................................................................................... 5
7. Stormwater Management Program Plan .................................................... 5
7.1 Public Education and Outreach .................................................................... 5
7.2 Involvement and Participation ...................................................................... 8
7.3 Illicit Discharge Detection and Elimination .................................................. 10
7.4 Construction-Site Stormwater Runoff Control ............................................. 12
7.5 Post-Construction Stormwater Management .............................................. 13
7.6 Pollution Prevention for Municipal Operations ............................................ 16

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INTRODUCTION
Why Care About Stormwater?
Adding impervious surface decreases the amount of stormwater that infiltrates into the
ground. This increases the amount and velocity of stormwater runoff. This can cause
accelerated erosion and downstream flooding. In addition, as stormwater flows across
impervious surfaces, it picks up various pollutants. These include excess nutrients, oil and
grease, bacteria and sediment. Polluted stormwater flows down storm drains and ditches
where it is discharged, untreated, into local streams, rivers, and lakes. Stormwater runoff
pollution causes adverse impacts to aquatic ecosystems, poses human health risks, and
can greatly increase the cost of treating drinking water.
Program Background
In 1972, the National Pollutant Discharge Elimination System (NPDES) program was
established under the authority of the Federal Clean Water Act. Phase I of the NPDES
Stormwater program was established in 1990. It required NPDES permit coverage for
municipalities with populations of 100,000 or more.
Phase II of the NPDES Stormwater program was signed into law in December 1999. The
Phase II program extended permit coverage to smaller (< 100,000 pop.) communities and
public entities that own or operate a municipal separate storm sewer system (MS4). It
required these smaller communities to develop a stormwater program and obtain an
NPDES permit for stormwater discharges.
In North Carolina, the Department of Environmental Quality (NCDEQ) administers the
NPDES Stormwater program. NCDEQ issued the Town of Hillsborough’s (Town) initial
Phase II permit, on October 1, 2005. The permit required the Town to develop, implement,
and enforce a stormwater program designed to reduce the discharge of pollutants from
the MS4 to the maximum extent practicable. The program was implemented in phases
over five years of the initial permit. Pursuant to the permit the stormwater program included
the following six minimum measures or best management practices (BMPs):
1. Public education and outreach on stormwater impacts;
2. Public involvement/participation;
3. Illicit discharge detection and elimination;
4. Construction site stormwater runoff control (Erosion Control);
5. Post-construction stormwater management for new development and
redevelopment;
6. Pollution prevention/good housekeeping for municipal operations.
The Town’s current permit, Number NCS000466, was issued on February 27, 2017. This
annual report reflects reporting requirements pursuant to the permit. Numbers reported
are for the fiscal year 2020-2021, which runs from July 1, 2020 to June 30, 2021 and is
referred to hereafter as FY2021.
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1. Storm Sewer System Information
1.1 Population Served
Estimated population served ........................ 7,8091
1.2 Growth Rate
Estimated increase 2010-2018 .................... 28.3%2
Estimated annual increase 2010-2018 ......... 3.14%
1.3 Jurisdictional Area
Town Limits ................................................. 5.7 sq. mi
ETJ .............................................................. 3.5 sq. mi.
1.4 MS4 Conveyance System
Due to the age of the town, MS4 consists of a variety of stormwater conveyances
and components. These range from typical curb and gutter systems conveyed by
concrete pipes to simple sheet flow. The predominate conveyance components
include grass lined swales and vegetated drainage ditches with various pipes and
culverts. There are also various detention systems within the Town’s jurisdiction,
however these are on private property.
MS4 system components are periodically inspected to ensure proper function. The
North Carolina Department of Transportation (NCDOT) maintains systems within
state road rights-of-way. Systems located on private property, including detention
facilities and other engineered stormwater controls, are maintained by the owner.
1.5 Land Use Composition
Estimated Land Use3
Residential ................................................... 35%
Commercial ................................................. 30%
Industrial ...................................................... 5%
Open Space................................................. 30%
Total ............................................................ 100%

1 July 2019 Data from North Carolina Office of Budget and Management, State Demographics Data,
http://www.osbm.state.nc.us/.
2 Percentage increase from 2010 to 2019 (North Carolina Office of Budget and Management, State
Demographics Data, http://www.osbm.state.nc.us/.)
3 Land use percentages were estimated from the Town of Hillsborough Land Use GIS database. Area of
parcels for each designated land use type were summed and calculated for relative percentage of the
planning jurisdictional area.
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1.6 TMDL Identification
Currently, no streams flowing into or out of the Town of Hillsborough’s jurisdiction
have an associated Total Maximum Daily Load.
2. Receiving Streams
The Town of Hillsborough lies entirely within the Falls Lake Watershed, which is part
of the Neuse River Basin. Specifically, the Town drains to the Eno River. Specific
receiving waters are listed below.
Receiving
Stream Description Classification Index No.
Eno River
(Corporation
Lake,
Lake Ben
Johnston)
From a point 0.4 mile upstream
of Dry Run to dam at Lake Ben
Johnston (Orange County water
supply intake & Town of
Hillsborough water supply
intake)
WS-II; HQW,
CA, NSW
27-2-(3.5)
Eno River From dam at Lake Ben
Johnston to Orange County SR
1561
C; NSW, N 27-2-(7)
Seven Mile
Creek
From a point 0.4 mile upstream
of I-85 to Lake Ben Johnston,
Eno River
WS-II; HQW,
CA, NSW
27-2-6-(1.5)
Rocky Run From a point 0.5 mile upstream
of I-85 to Seven Mile Creek
WS-II; HQW,
NSW
27-2-6-2-(2)
Cates Creek From source to Eno River C; NSW 27-2-8
Strouds Creek From source to Eno River C; NSW 27-2-9
Stony Creek From source to a point 0.4 mile
upstream of Orange County SR
1710
C; NSW 27-2-13-(1)
3. Existing Water Quality Programs
3.1 Local Programs
The following programs and ordinances are being implemented within the Town of
Hillsborough’s jurisdiction.
Unified Development Ordinance (UDO) – regulates overall development and land
use. Specific water quality aspects include local stream buffer rules and post
construction stormwater requirements, including nutrient limits.
Flood Damage Prevention – through its UDO the Town protects water quality by
preventing new development within flood hazard zones.
Local Nutrient Sensitive Waters (NSW) Strategy - through its UDO the Town
adopted stormwater requirements for new development to meet the Falls Lake
Nutrient Management Strategy (Falls Lake rules).
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Delegated Erosion and Sediment Control Program - as noted in Section 6, the
Town relies on Orange County to conduct an erosion control program. Orange
County has local delegated authority from the state.
3.2 State Programs
State programs, including the Neuse, Falls Lake, and Water Supply Watershed
rules are implemented at a local level. The Town of Hillsborough does rely on
NCDOT to maintain stormwater facilities and programs within state-owned road
rights-of-way.
4. Permitting Information
The Town’s Stormwater Program is under direction of the Stormwater and
Environmental Services Manager. Stormwater and Environmental Services is a
division of the Town’s Planning Department. The Stormwater and Environmental
Services Division works closely with Utilities, Public Works and Planning departments,
and is supervised by the Assistant Town Manager/Planning Director.
4.1 Responsible Party Contact List
Overall implementation and oversight of the Town’s Stormwater Program is
directed by:
Terry Hackett, Stormwater & Environmental Services Manager
Town of Hillsborough
P.O. Box 429
101 E. Orange Street
Hillsborough, NC 27278
Telephone: [phone]
Email: [e-mail]
4.2 Signing Official
The Town of Hillsborough operates under a council-manager form of government.
The town manager is responsible for management and oversight of the Town’s
daily operations. Contact information is listed below:
Eric Peterson, Town Manager
Town of Hillsborough
101 E. Orange Street
P.O. Box 429
Hillsborough, NC 27278
Telephone: [phone]
Email: [e-mail]
5. Co-Permit Status Information
The Town of Hillsborough holds its own NPDES Phase II permit and does not co-
permit with another entity.
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6. Reliance on Another Entity
The Town of Hillsborough utilizes Orange County to implement the Construction Site
Stormwater Runoff Control (i.e. erosion control) portion of its stormwater program.
6.1 Contact Information
Erosion Control Program: Patrick Mallet, Erosion Control Supervisor
Orange County Planning and Inspections Department
131 W Margaret Lane, Suite 201
Hillsborough, NC 27278
919-245-2577
[e-mail]
6.2 Legal Agreement
The Town maintains an inter-local agreement with Orange County to provide
erosion control services. The current agreement was approved in October 2012.
7. Stormwater Management Program Plan
The following sections briefly describe the Town’s stormwater management program
for each of the six BMPs. Detailed information regarding each program area can be
found in the Town’s comprehensive stormwater management plan, available on the
Town’s website.
7.1 Public Education and Outreach
The objective of the Town’s stormwater public education and outreach program is
to increase citizen awareness of stormwater runoff pollution and related issues.
The Town’s stormwater public education and outreach program includes the
following primary components:
• Disseminate Educational Materials
The Town disseminates educational materials that are either developed in-
house or use existing materials available from other agencies. These materials
are distributed electronically, at educational programs, special events and
directly to individual citizens or businesses.
• Stormwater Newsletter, Articles and Press Releases
The Town publishes the Stormwater Almanac, a newsletter that educates and
informs citizens about stormwater management issues within the Town. In
addition, Town stormwater staff often write articles on various stormwater
program related topics that are published in other periodicals. Stormwater staff
also coordinate with the town’s Public Information Office for press releases
from the Town highlighting stormwater management related issues,
stormwater related volunteer events, etc.

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• School programs
The Town conducts direct educational, stormwater related programs for local
schools. This includes partnering with other local governmental agencies
conducting environmental education programs in local schools. Annual
programs include Earth Walk with local seventh grade students, Eno River field
trip with Orange High AP Environmental/Earth Science classes, science night
at The Expedition School, as well as other programs as requested.
• Special Events and Civic Groups
The Town provides stormwater education and outreach programs/materials at
local special events such as “Last Fridays”, “Earth Evening” and “Citizens
Academy.” Town stormwater staff also provides educational programs to
various civic groups, including local scout units, homeowner associations,
churches and various other groups.
• Social Media
The Town maintains a Facebook page (www.facebook.com/ToHGovSW/) and
Twitter account (@ToHGovSW) for the Stormwater and Environmental
Services Division. Weekly posts provide education on pollution prevention,
encourage citizens to explore nature and enjoy the Town’s water resources,
and promote special events and volunteer workdays.
• Clean Water Education Partnership.
The Town of Hillsborough actively participates in the Clean Water Education
Partnership (CWEP). CWEP assists member governments with their
stormwater outreach and education program by leveraging member dues to
conduct various media campaigns. The FY2021 CWEP annual report can be
accessed from their website, http://www.nccwep.org/.
Due to the COVID-19 Pandemic, many of the Town’s direct education programs
were cancelled. FY2021 Summary statistics for the primary components of the
Town’s Public Education and Outreach Program are provided in the following
sections for items not cancelled due to the pandemic.
7.1.1 School Program Statistics
Most of the Town’s direct education programs to schools occur in the fall
of the year. Due to the COVID-19 pandemic, in-person school programs
were cancelled and therefore no statistics are provided.
7.1.2 Outreach, Special Events and Other Program Statistics
Due to the COVID-19 pandemic, Town staff had to find different ways to
disseminate stormwater educational materials and participate in virtual
educational programs. Town staff supported the Orange and Alamance
Counties Water Quality Collaborative Project, participated in a virtual
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“Creek Week,” and utilized a group of Elon University environmental
science students to develop on-line educational materials.
For the virtual “Creek Week” event, town staff produced five educational
videos highlighting unique characteristics of the Town’s creeks and the Eno
River. Through these examples, the videos educated the public on how to
protect water quality and why this protection is important to people and
aquatic life. The videos were promoted through a five-day social media
campaign, and CWEP provided additional promotion through their website
and social media.
Elon University students supported stormwater staff in developing green
infrastructure and climate impact fact sheets and ESRI story maps. Links
to these materials were added to the Town’s Stormwater Education
webpage and disseminated through the Town’s electronic mailing list as a
press release. A two-week social media campaign promoted the materials.
The green infrastructure information was also distributed electronically to a
local residential property association along with other stormwater related
information in conjunction with an ongoing study of the neighborhood’s
stormwater infrastructure.
Likewise, both virtual and in-person meetings were held with other
homeowner associations focused on SCM operation and maintenance and
their function as pollution removal systems. The following table
summarizes FY2021 statistics:

Outreach, Special Events and Other Programs - FY2021
Program Participants Handouts/
Giveaways
Virtual Creek Week n/a4 --
Orange and Alamance Counties Water
Quality Collaborative Project 30 30
Elon University GI Project 5 --
Waterstone Estates and Terraces HOA
Meeting 5
Crescent Magnolia HOA Meeting 5
Harmony at Waterstone HOA Meeting 6
Cornwallis Hills POA 1005 100
Total 151 130

4 Videos were posted to the Town’s stormwater Facebook page and social media statistics provided include
the creek week posts.
5 Information was distributed via the POA’s electronic distribution list
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7.1.3 Newsletters, Articles and Press Release Statistics
Newsletters, Articles and Press Release Statistics – FY2021
Stormwater Almanac (newsletter) Issues Published 2
Stormwater Related Press Releases 5
Stormwater Related Articles Written/Published 2
7.1.4 Town of Hillsborough Social Media Statistics
Social Media Posts - FY2021
Statistic Facebook Twitter
Posts 72 57
Followers 218 212
Impressions 9,288 15,947

Facebook Post Statistics - FY2021
Statistic Total Average per Post
Post Reach6 7,466 104
Post Impressions7 8,335 116
Engaged Users8 393 5
7.2 Involvement and Participation
The objective of the Town’s public involvement and participation program is to
strengthen citizen engagement in stormwater and environmental issues affecting
the Town. Public Involvement and participation includes providing volunteer
opportunities, exchanging information with citizens and elected officials, and
providing public assistance on stormwater related issues.
• Volunteer Opportunities
Town Stormwater and Environmental Services Division staff coordinates
volunteer opportunities to raise awareness of stormwater runoff pollution,
engage citizens and ultimately reduce target pollutants. Volunteer
opportunities regularly include trash/litter clean-ups, wetland/riparian
vegetation planting, invasive species removal/monitoring, qualitative stream
monitoring, and maintenance of the Town’s pollinator/rain gardens and
stormwater wetland.

6 Count of people for whom the post entered their screen
7 Count of times a post entered a person's screen
8 Count of people who engaged with the post, including liking, comm enting, and sharing
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• Public Meetings
At a minimum, Town Stormwater and Environmental Services Division staff
presents one update to Hillsborough’s elected Town Board of Commissioners
regarding the stormwater program, annually. As part of the presentation, Town
Commissioners can provide input on pertinent issues. Staff may also provide
presentations to other Town advisory boards as requested.
• Public Assistance
Town Stormwater and Environmental Services staff provides assistance to
citizens regarding stormwater pollution prevention, riparian buffer regulation,
drainage issues and other related topics. This includes site visits and
investigations as necessary.
In addition to the items listed above, the Town maintains a website with pertinent
stormwater information. This includes email and phone numbers of stormwater
staff so that citizens can report concerns. Other than emails and calls received,
Town Stormwater and Environmental Services staff does not report website
statistics.
FY2021 Summary statistics for the primary components of the Town’s Public
Involvement and Participation Program are provided in the following sections.
Please note that due to the COVID-19 pandemic, some volunteer opportunities
planned were canceled. For instance, no planting events were held in FY2021.
Volunteer opportunities that were held, followed state and town mandated
restrictions.
7.2.1 Volunteer Opportunity Statistics
Litter/Trash Clean-ups – FY2021
Number of Events 19
Number of Volunteers 114
Miles Cleaned ~5.0
Pounds Collected 1,460

Volunteer Monitoring – FY2021
Number of Groups 1
Number of Monitoring Locations 1
Total Number of Volunteers 8
Number of Actions Completed as a result10 1

9 Due to the COVID-19 pandemic, the Town combined litter cleanup into one campaign where residents could
then work in small groups at their own timing and safety to collect trash and litter.
10 The monitoring was at the Gold Park stormwater wetland, where a small group of volunteers removed trash,
cattails and other nuisance vegetation.
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7.2.2 Public Meeting Statistics
Stormwater Related Public Meeting – FY2021
Number of Public Meetings 7
Number of Attendees 13411
7.2.3 Public Assistance Statistics
Public Assistance – FY202112
Number of Calls, Complaints, Issues 54
Number Resolved 51
7.3 Illicit Discharge Detection and Elimination
The Town’s stormwater illicit discharge detection and elimination program (IDDE)
is outlined in its Illicit Discharge Detection and Elimination Plan and is enforced
through the Town code. This plan details measures that Town Stormwater and
Environmental Services Division staff follows to find and eliminate illicit discharges
and connections to the MS4. The primary components of this plan are described
below:
• MS4 Mapping
The Town maintains a GIS map and database of the stormwater infrastructure
within town limits. This includes pipes, ditches, swales catch basins, inlets,
outlets and stormwater outfalls. The Town defines stormwater outfalls more
broadly than EPA definitions. This conservative approach allows Town
Stormwater and Environmental Services Division staff to evaluate outfalls as
time allows and may eliminate some as stormwater outfalls, if appropriate.
Currently, there are approximately 123 stormwater outfalls located within the
Town’s jurisdiction.
• High Priority Areas
The Town’s Illicit Discharge Detection and Elimination Plan calls for the
identification of high priority areas for IDDE screening investigations. The Town
has designated four high priority areas: Downtown, Central Business District,
West Hillsborough, and Meadowlands. These areas reflect a relatively high
development density as well as a concentration of light industrial and
commercial land use.

11 Includes virtual attendees through Zoom but does not include attendees that may have live streamed the
meetings via the Town’s YouTube channel.
12 Includes increased number of email requests (presumably due to COVID -19), phone calls and resulting site
visits.
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• Illicit Discharge Investigation
In general, this includes screening of high priority areas, dry weather
inspections of stormwater outfalls and investigation of complaints/concerns
submitted by citizens or by other town employees.
• Sanitary Sewer Overflows
While a sanitary sewer overflow (SSO) is ultimately the responsibility of the
Town’s Utility Department, overflows can reach the stormwater system and/or
receiving waters and are considered an illegal discharge. Therefore, statistics
for SSO’s are included below.
• Employee Cross-Training
An important aspect of the town’s IDDE program is to provide training to other
town employees in recognizing and reporting possible illicit discharges and
connections. In FY2020, stormwater program training materials were updated
by staff and training occurred just prior to the COVID-19 pandemic. However,
no training occurred in FY2021 due to the pandemic. Staff is planning to hold
in-person training again in FY2022.
FY2021 Summary statistics for the primary components of the Town’s IDDE
Program are provided in the following sections.
7.3.1 Illicit Discharge Statistics
Illicit Discharge Summary – FY2021
Illicit Discharge
Screening & Inspection
Screening Investigations conducted 12
Dry weather inspections conducted 12
Illicit discharges found 0
Illicit connections found 0
Illicit discharges/connections resolved n/a
NOVs Issued n/a

Illicit Discharge Summary – FY2021 (continued)
Individual Complaints
& Investigations
Number of Complaints/Investigations 1
Investigations resolved 0
NOVs Issued 0
7.3.2 Sanitary Sewer Statistics
There were no reportable Sanitary Sewer Overflows (SSOs) in FY2021.
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7.3.3 Cross-Training Statistics
Due to the COVID-19 pandemic, no employee cross-training was held.
Staff expects to provide in-person training again in FY2022 and is planning
to work with Human Resource staff to provide remote training options in
the future.
7.4 Construction-Site Stormwater Runoff Control
Orange County implements and enforces construction site stormwater runoff
control for the Town of Hillsborough through its erosion control program. Orange
County has local delegated authority from the state to implement an erosion control
program. Legal agreements are in place allowing Orange County to enforce its
sedimentation and erosion control ordinance within the Town’s jurisdiction except
for publicly funded projects, which are subject to state jurisdiction.
Active construction projects are inspected regularly by Orange County Erosion
Control staff. Inspection reports, notice of violations (NOVs) and stop work orders
are provided to Town Stormwater and Environmental Services staff. In addition,
the Town is required to conduct periodic audits/inspections of active construction
sites, including Town construction projects, to help ensure compliance. Generally,
Town Stormwater and Environmental Services Division staff typically inspect
active construction sites once a month and conduct brief site visits more frequently.
FY2021 Summary statistics for the primary components of the Town’s
Construction-Site Stormwater Runoff Control Program are provided in the
following sections.
7.4.1 Erosion Control Projects Reviewed/Permitted FY2021
ECP Review Summary – FY2021
Project Name Tract Size
(acres)
Area
Disturbed
(acres)
Ellis Residence – LDP20-0045 1.79 1.0
Collins Ridge – EC17-0092 (Renewal) 139.0 103.0
Forest Ridge Phase 6 & 8 (Renewal) 14.0 0.45
Leland Little Auction Expansion 7.16 3.82
Totals 161.95 108.27

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7.4.2 Erosion Control Inspection Statistics
Inspection Summary – FY2021
Active Projects Privately Owned 11
County Owned --
State Owned13 1
Town Owned Projects --
Total 12

Inspection Summary – FY2021 (continued)
Inspections Conducted OCEC Staff 81
Town Staff 2114
Total 102

Enforcement Actions NOVs Issued 0
Stop Work Orders 0
Total 0
7.5 Post-Construction Stormwater Management
The Town’s post-construction stormwater program includes two primary
components: new development review/approval and stormwater control measure
(SCM) inspection.
• New Development Review
Proposed development projects are reviewed to determine if the Town’s
stormwater standards within the Unified Development Ordinance (UDO) are
met. Projects meeting those requirements are issued a stormwater
management plan approval. New development projects must currently meet
both the NPDES Phase II post-construction stormwater requirements and the
Falls Lake Rules nutrient loading requirements. Additionally, all SCMs must
meet the state’s Minimum Design Criteria (MDCs).
• SCM Inspection Program
The Town is required to maintain an SCM inspection program pursuant to both
the NPDES Phase II regulations and the Falls Lake rules. The Town requires
the owner of each SCM to inspect at least annually and submit a report to the

13 The state owned UNC Hospital expansion is subject to the Town’s post-construction stormwater
management requirements, but is permitted by the state’s erosion control program.
14 Town Stormwater and Environmental Services staff conduct periodic, informal inspections of active
construction sites, as well as responds to complaints regarding construction site runoff. This augments the
formal inspections completed by OCEC.
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Stormwater and Environmental Services Division. Additionally, the Town is
required to inspect (or what the Town staff now calls “audit”) SCMs approved
through the UDO at least once every five years.
There are also SCMs within the Town’s planning jurisdiction that were
approved prior to the Town’s NPDES stormwater permit issued in 2005. In
March of 2013, Stormwater and Environmental Services embarked on a
program to bring all SCMs within the Town’s planning jurisdiction into
compliance. This process includes conducting onsite audits of private SCMs
by Town Stormwater and Environmental Services Division staff as time and
resources allow. The intent is to exceed the audit/inspection interval required
by the NPDES and Falls Lake regulations. The goal is to complete at least a
third of SCM on site audits annually.
Town Stormwater and Environmental Services Division staff also tracks
compliance with submittal of the required annual maintenance and inspection
reports. The Town’s UDO requires all SCM owners to submit their annual
inspection report by September first of each year. The Town does allow
exceptions to this requirement for specific situations. For instance, SCMs that
are completed and closed out prior to the September first deadline are often
exempted from this requirement in the first year.
Stormwater and Environmental Services began a new program in FY2018 to
recognize those SCM owners who have exceptional compliance records.
Annually in the early spring, staff evaluates SCM owner compliance and
selects a small subset of owners to be recognized. Winners are recognized via
social media, town press release, and the Stormwater Almanac publication.
They are also given a certificate signed by the mayor.
FY2021 summary statistics for the primary components of the Town’s Post-
Construction Stormwater Management Program are provided in the following
sections.
7.5.1 New Development Review Statistics
Development Summary of Approved Projects – FY2021
Development Name Type Site
Acreage
Impervious
Acreage
Number
of SCMs
Leland Little Auction House –
Second Addition Commercial 3.47 0.69 5
Waterstone Fire & EMS Station Institutional 2.0 0.87 2
Total 5.47 1.56 7

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SCMs Approved for Development Projects – FY2021
Stormwater BMP Type Quantity
Bioretention 1
Filterra 2
Stormwater Wetland 1
Underground Detention 3
7.5.2 SCM Inspections Statistics
SCM Onsite Audit Summary – FY2021
Number of Mapped SCMs 133
SCMs Requiring 2020 Inspection 93
Audits/Inspections Conducted 39
Maintenance Issues Identified 15
Maintenance Issues Resolved as a Result 8
Violations Noted 0
NOVs Issued 0
7.5.3 SCM Annual Maintenance Inspection Report Compliance
Annual Inspection Reports Received – FY2021
Y ear No. of SCMs Compliant
2013 63 13%
2014 66 47%
2015 72 71%
2016 85 73%
2017 87 76%
2018 91 78%
2019 95 87%
2020 122 72%
2021 9315 95%

15 Starting in FY21 the Town is reporting the number of SCMs scheduled to submit their annual inspection
report rather than total SCMs to track percent compliance. For instance, there were several SCMs
completed and closed-out in FY21 that do not require an inspection report until next year.
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7.6 Pollution Prevention for Municipal Operations
The Town is required to develop and implement a pollution prevention program for
municipal operations. In previous years, this program was guided by the Town’s
Pollution Prevention/Good Housekeeping Plan. As part of the annual assessment
of the Town’s stormwater program staff reviewed that plan and determined that it
needed updated to better reflect NPDES permit requirements. The result is a new
operation and maintenance plan that covers town-owned facilities, town-owned
SCMs and the town’s MS4.
The Town’s Operation and Maintenance Plan for Stormwater Pollution Prevention
(OMP) includes seven primary components and are briefly described below.
• Inventory of Town Owned/Operated Facilities
The OMP includes all town facilities with the potential for generating
stormwater runoff pollution during town operations. The Town has developed
and maintains an inventory that includes spatial data on the location, type and
condition. The spatial information is maintained in a GIS system and is updated
at least annually.
• Inspection Program
The inspection program specifies the inspection procedures for all town
facilities addressed in the OMP. Procedures are tailored to each type of facility
and priority level. Compliance inspections are conducted at all town-owned
properties. Those identified as priority properties in the OMP are inspected
annually, while non-priority properties are inspected at least once every five
years. Priority facilities include the Wastewater Treatment Pant (WWTP),
Water Treatment Plant (WTP), the Utility Collections and Distributions yard, the
Public Works yard, and the Fleet Maintenance facility. These facilities are
typically inspected at the beginning of the fiscal year.
Town facilities containing SCMs are also inspected annually, typically in May
and June of each year. This timeframe allows a better assessment of the
vegetative components of town-owned SCMs, lawn and other landscape or
open space areas associated with town properties. Follow up inspections are
conducted to ensure maintenance work is completed.
MS4 inspections are completed by “neighborhood” and a schedule is provided
in the OMP. Supplemental MS4 inspections are conducted as part of our
routine duties and often include citizen reported concerns. Inspections results
for town-owned facilities, SCMs and MS4 are included in Section 7.61.
• Routine Maintenance
While specific maintenance items will be identified through the inspection
process described previously, the OMP also identifies pollution prevention
practices that are part of the routine maintenance of facilities. This includes
things like stabilizing areas subject to erosion, picking up loose litter and trash,
containing spills and leaks, etc. Routine maintenance covers town-owned
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properties, town-maintained streets and parking lots, town-owned SCMs and
the town-owned MS4. Town staff tracks and evaluates effectiveness of regular
street sweeping, percentage of storm drains/catch basins cleaned, amount of
trash and debris removed from streets and MS4 components, the linear reet of
ditches/swales maintained, and the amount of leaves collected from streets.
• Spill Response Procedures
The Town’s Spill Prevention, Control and Countermeasure Plan describes the
procedures established to respond to and prevent spills. The plan outlines
procedures for spill contingency, training, security, discharge prevention, and
evaluation of risk. The plan also provides an inventory of storage facilities and
specifies discharge and drainage controls. The Town of Hillsborough Safety
and Risk Manager developed this plan and will be responsible for updating the
plan periodically with input from facilities managers and stormwater staff.
• Pesticide, Herbicide and Fertilizer Application Management
As part of this plan, town operations include practices that minimize the use of
pesticides, herbicide, and fertilizer and ensure the proper use, handling,
storage, and disposal of these products. Stormwater pollution prevention
training workshops include an overview of practices relevant to municipal use
of pesticide, herbicide, and fertilizer. Within each department, supervisors are
responsible for ensuring that employees and contractors are properly trained
in pesticide, herbicide, and fertilizer application and all permits, certifications,
and other measures for applicators are followed. Guidelines are provided in
the OMP.
• Training
The goal of the training program is to provide staff with the resources needed
to successfully minimize or eliminate stormwater pollution during daily Town
operations. While the inspection program works directly with specific staff, the
training program is broader in scope and includes all Town staff. The program
provides a variety of training opportunities to accommodate staff needs and
availability.
• Vehicle Equipment Cleaning
The Town provides a covered vehicle wash area located at the Fleet
Maintenance Facility. The wash area consists of a concrete pad that drains to
an oil and water separator, which then drains to the sanitary sewer. A roof
covers the entire vehicle wash area. Staff who operate vehicles are instructed
to use this wash area for all vehicle and equipment cleaning. The OMP also
outlines practices related to vehicle and equipment cleaning.
Annual statistics for reportable portions of the OMP are provided in the following
sections.
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7.6.1 Pollution Prevention Inspection Results
Town facilities inspected in FY2021 are listed in the following table. No low
priority facilities were inspected in FY2021 but have been inspected at least
once in the last five years. Please refer to the Town’s OMP for a list of all
facilities.

Town Facility Pollution Prevention Inspections - FY2021
Facility Status
1. Cates Creek Park Compliant
2. Fleet Maintenance Compliant
3. Gold Park Compliant
4. Old Landfill Compliant
5. Public Parking Compliant
6. Public Works Yard Compliant
7. Riverwalk Compliant
8. Wastewater Treatment Plant Compliant w/Conditions
9. Water Distribution Yard Compliant w/Conditions
10. Water Tower (UNC Hospital) Compliant
11. Water Treatment Plant Compliant w/Conditions
7.6.2 SCM Inspection Results
Town-owned SCMs and inspections results are listed in the following table.
Follow up inspections will be completed in the upcoming fiscal year for
those listed as “needs maintenance.”
Town-Owned SCM Inspections – FY2021
Facility SCM Type Status
1. Cates Creek Bioretention Passed
2. Fleet Maintenance Level Spreader Needs Maintenance
3. Fleet Maintenance Underground Detention Passed
4. Gold Park Bioretention Needs Maintenance
5. Gold Park Stormwater Wetland Passed
6. Riverwalk Dry Detention Needs Maintenance
7. Water Tower Bioretention Needs Maintenance
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7.6.3 MS4 Inspection Summary
One “neighborhood” was scheduled for an MS4 assessment in FY2021.
The assessment rates “level of service” of the MS4. The condition of each
component in the neighborhood is maintained in a GIS database and
provided to the Public Works department to schedule maintenance.
MS4 Neighborhood Assessment Completed – FY2021
Name: Cornerstone
Type: Commercial
Streets: Cornerstone Ct, Valley Forge Road
Condition16: Good 20%
Fair 50%
Poor 30%
7.6.4 MS4 Maintenance Statistics
MS4 Maintenance/Cleaning – FY2021
Street Sweeping Linear Feet/Month 63,398
Total Linear Feet 570,582
Debris/Sediment Removed (tons)17 4.61
Percentage of Streets Noted “dirty”18 13%
Storm Drains/
Catch Basins
Percent Cleaned19 20%
Trash/Debris/Sediment Removed (pounds) ~2,00020
Streets & Road
Shoulders
Leaves Collected (tons) 635
Loose Trash/Litter Removed (pounds) ~2,50018
Swales/Ditches Linear Feet Maintained21 4,102

16 Percentages are approximated based on the number of MS4 assets that were assessed. Please refer to
the Town’s OMP for a list of neighborhoods and fiscal year scheduled.
17 The Town contracts street sweeping and data was only available for the second half of the fiscal year but
is now being tracked monthly.
18 The Town’s street sweeping contractor notes which streets each month that were notably “dirty.” The
number noted represents the average percent of linear feet noted as dirty. The Town is using this
information to determine where to focus future efforts, track trends and eval uate effectiveness.
19 This represents cleaning of loose debris and accumulated sediment. These catch basins are inspected and
cleared monthly of debris.
20 This number is estimated by Public Works; staff are working towards tracking these amounts more exactly.
21 This may include removal of debris, removal of accumulated sediment, reshaping, revegetating, etc.
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7.6.5 Employee Training Statistics
Due to the COVID-19 pandemic, no employee training was held. Staff
expects to provide in-person training again in FY2022 and is planning to
work with Human Resource staff to provide remote training options in the
future.