NCS000407_2017 Annual report_20210527

City of Mount Holly
MS4 Stormwater Program Annual Report
2016 - 2017
PERMIT NO. NCS000407
Prepared By:
David E. Johnson, PE
City Engineer
City of Mount Holly
August 1 6, 2Q 17
TABLE OF CONTENTS

1. STORM SEWER SYSTEM INFORMATION ................................................ 1
1.1
Population Served........................................................................ 1
1.2
Growth Rate................................................................................ 1
1.3
Jurisdictional and MS4 Areas......................................................... 1
1 A
MS4 Conveyance System............................................................. 1
1.5
Land Use Composition Estimates..................................................... 1
1.6
TMDL Identifications..................................................................... 2
2. RECEIVING STREAMS.......................................................................... 2
3. EXISTING WATER QUALITY PROGRAMS ................................................ 2
3.1 Local Programs........................................................................... 2
3.2 State Programs........................................................................... 3
4. PERMITTING INFORMATION................................................................. 3
4.1 Responsible Party Contact List ....................................................... 3
4.2 Organizational Chart..................................................................... 3
4.3 Signing Official............................................................................ 3
4.4 Duly Authorized Representation...................................................... 3
5. CO -PERMITTING INFORMATION (IF APPLICABLE) ................................... 3
5.1 Co-Permittees............................................................................ 3
5.2 Legal Agreements........................................................................ 4
5.3 Responsible Parties..................................................................... 4
6. RELIANCE OF GOVERNMENT ENTITY .................................................... 4
6.1
Name of Entity............................................................................ 4
6.2
Measure Implemented.................................................................. 4
6.3
Contact Information...................................................................... 4
6.4
Legal Agreements........................................................................ 4
7. STORMWATER MANAGEMENT PROGRAM PLAN ..................................... 4
7.1
Public Education and Outreach on Stormwater Impacts .......................
4
7.2
Public Involvement and Participation.........................................................
6
7.3
Illicit Discharge Detection and Elimination .........................................
8
7.4
Construction Site Stormwater Runoff Control .....................................
10
7.5
Post -Construction Stormwater Management in New Development and
Redevelopment...........................................................................
10
7.6
Pollution Prevention / Good Housekeeping for Municipal Operations ......
20
City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

The following annual report for activities relating to stormwater management within the City of
Mount Holly has been prepared for the calendar year 2013. The City of Mount Holly was
granted a Stormwater Permit renewal on December 1, 2011 for the purpose of managing
stormwater runoff. One of the tenets of this permit was for the City to prepare an annual report
of activities. This is that report. This report is filed with the North Carolina Department of
Environment and Natural Resources (NC DENR) and a matter of public record.
The information presented in this report follows the format established by NC DENR and
outlined in their "Instructions for Preparing the Comprehensive Stormwater Management
Report". These instructions outline seven (7) areas of reporting. This report is segmented into
each of those seven areas.
1. Storm Sewer System Information
1.1 Population Served
Based on United States Census Bureau data, the population of Mount Holly in the year
(1990) 7,710; (2000) 9,618; (2008) 10,081; (2010) 13,656; (2012) 13,663 (201 �) 1 3-1,904
2 Growth Rate
(1990 ---
2000):
(2000
— 2008):
(2008 —
2010):
(2010 —
2012):
(2010 —
2013):
2.5 % per year
0.6% per year
17.7% per year
Negligible
0.9% per year
1.3 Jurisdictional and MS4 Service Areas
Jurisdictional Area is 10.4 square miles in 2012. The MS4 Service area is considered
the same as the jurisdictional area.
Land area is updated every ten years by the US Census Bureau.
1.4 MS4 Conveyance System
The City of Mount Holly has a network of open ditches, swales, pipes, culverts and
stormwater BMPs within the incorporated limits. The oldest portions of the system are
sixty or more years old. The majority of the system is between ten and forty years old,
coinciding with the population growth trends.
1.5 Land Use Composition Estimates
A review of GIS Land coverage data was used to generate the raw data for Land Use
estimates. The approximate percentages for each category are:
Residential - 62%
Commercial -13%
Industrial - 13%
1 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

Open Space —12%
1.6 TMDL Identification
A portion of the City of Mount Holly MS4 discharges into the Catawba River, for which a
TMDL was approved in 2002. The City POTW has a TMDL for cyanide of 22ug/I, and a
TMDL for chlorine of 28 ug/I.
2. RECEIVING STREAMS
Stream
Receiving Stream
Segment
Water
Size
Use Support
Water
Category
Name
( Assessment
nail
1)
Rating (3)
Quality
e
(year)
Unit Number}
Class
issues
Catawba River Basin
11-119-(0.5)
WS-1V
Impaired
Turbidity (5)
5
2010)
Dutchmans Creek
7.4 miles
Not rated -Potential
Fecal Coliform
3a
(lower)
Standards violation
Bacteria (s)
11-119-(6)
WS-IV; CA
1.5 miles
Not assessed
Stanley Creek
11-119-3-(2)
WS-W
4.7 miles
Impaired
Low DO
5
2010)
South Stanley
11-119-4
WS-IV
4.8 miles
Supporting
N/ACreek
--
Taylors Creek
11-119-5
WS-IV
Not rated -Potential
Fecal Coliform
3a
6.0 miles
Standards violation
Bacteria
11-121-(1)
WS-TV
3.9 miles
Not rated -Potential
Fecal Coliform
Fites Creek
Standards violation
Bacteria
3a
11-121-(2)
WS-IV; CA
0.5 miles
Not assessed
Catawba River
11-(114}
WS-1V, B;
1937.1
Impaired
Low
5
t. island Lake
CA
acres
(4)
pH
(2010)
Catawba River
(from MIL dam to Hwy
l l-(1 17)
WS-IV; CA
375.3 acres
1
impaired (4)
Low pH
5
85 (Lake Wylie))
(2008)
Notes:
1. Category 3a- Parameter assessment is Not Rated due to insufficient or inconclusive data.
2. Category 5- The 303(d) list is a list of Category 5 impaired waters that require a TMDL. If water quality data exceed a surface water
quality standard then the waterbody is considered impaired and can be assigned an integrated reporting category number of 5. The
reporting of these impaired waters is required under section 303(d) of the Clean Water Act of 1972.
3. Only Categories 4 and 5 are IMPAIRED waterbodies.
4. Based on the 2010 Catawba Basin report, 12% of pH samples were below 6 su. The state standard for pH is between 6 and 9 su.
Exceedances only occurred in the first three years during the months of March and April. The lake will appear on the Draft 2010
Impaired Waters list for the first time due to pH standard exceedances. The source of low pH is unknown at this time, but has been
seen basinwide. DWQ is currently in the planning stages of a special study to collect additional data that will assist in determining the
severity of the low pH impairment. The lake's Use Support rating will be reassessed at the completion of that study.
5. Based on the 2010 Catawba Basin report, the creek's turbidity impairment; however, is most likely due to recent residential
development and other land clearing activities within the Dutchmans Creek subwatershed. DWQ will work with Division of land
resources to determine if additional action needs to take place to avoid further degradation due to sedimentation. High Fecal Coliform
levels may be a result of failing septic tanks or collection systems.
6. WS 4V = Class 4 water supply watershed WS-IV and Class C water quality standards apply
CA — critical Area of water supply watershed.
Water quality standard - Class C apply to all waters . Class B standards only apply where listed.
7. All waters in North Carolina are in a Category 5-303(d) list for Mercury due to the statewide fish consumption advice for several fish
species.
2 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

3. EXISTING WATER QUALITY PROGRAMS
3.1 Local Programs
The following local programs are implemented in the City of Mount Holly
Adopt -a -Stream
The City encourages participation in the Adopt -a -Stream program designed to engage
the public in Stormwater Quality awareness and protection. Local Boy Scout Troop
participated in the clean-up activities along Dutchmans Creek.
Illicit Discharge Detection and Elimination (IDDE) Ordinance
An IDDE Ordinance was adopted by City Council in 2006.
Watershed District Overlay
These land development controls were implemented by the Planning and Zoning
Department and is included in the Zoning Ordinance. The Lake Wylie Watershed and
the Mountain Island Lake Watershed have two distinct watershed overlay districts:
1. Watershed Critical Overlay District
2. Watershed Protected Area Overlay District
Sediment and Erosion Control Program
This is a cooperative agreement with Gaston County which provides for Erosion and
Sediment Control review, approval and enforcement services for the City associated with
any land disturbance of over 1 acre
3 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

3.2 State Programs
State programs adopted through ordinances that supplement the stormwater program
include the 401/404 standards of the Division of Water Quality and buffer requirements
along perennial streams. These standards, as well as those of the US Army Corps of
Engineers, also provide protection to wetland areas.
4. PERMITTING INFORMATION
4.1 Responsible Party Contact List
Mr. David E. Johnson, PE
City Engineer
400 East Central Avenue
PO Box 406
Mount Holly, NC 28115
704-951-0074 x102
[e-mail]
4.2 Organizational Chart
City Council
City
Manager
Utility
Director
City Stormwater
Engineer Coordinator
4.3 Signing Official
Mr. Danny Jackson
City Manager
400 East Central Avenue
PO Box 406
Mount Holly, North Carolina 28120
704-827-3931
[e-mail]
4.4 Duly Authorized Representative
Not Applicable
5. Co -Permitting Information (if applicable)
5.1 Co-Permittees
The City of Mount Holly is not working with another MS4 to implement this program.
4 City of Mount Holly
MS4 Slormwater Program Annual Report 2016-2017

5.2 Legal Agreements
Not Applicable.
5.3 Responsible Parties
Not Applicable.
6. Reliance on Other Government Entity to satisfy one or more permit obligation(s):
6.1 Name of Entity
Gaston County Natural Resources Department
1303 Cherryville Highway
Dallas, NC 28034
6.2 Element Implemented
All land disturbing activities that uncover more than one (1) acre are required to submit a
Soil Erosion & Sedimentation Control Plan for review, approval and enforcement.
6.3 Contact Information
David R. Freeman, P.E., Director, Gaston Natural Resources Department
1303 Cherryville Highway
Dallas, NC 28034
Telephone: [phone] Fax: [phone]
E-mail: david.freeman@co,gaston.nc.us
6.4 Legal Agreements
The City of Mount Holly Council has authorized erosion control review, approval and
enforcement to Gaston Natural Resources Department.
7. STORMWATER MANAGEMENT PROGRAM
7.1 Public Education and Outreach on Storm Water Impacts
A. Responsible staff: David E. Johnson, PE, City Engineer
B. Program Section Objectives: The initial effort will be given to identify the type(s) of
pollutants for which the City's drainage system is most greatly impacted, and identify
the most consistent sources of pollutants.
Target Pollutant Sources:
These sources include those most prevalently found in primarily growing residential
communities: oil and grease, soaps, and sediment.
5 city of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

Target Audience:
The target audiences for the education program include adult residents, students of
all ages, municipal employees, businesses both industrial and commercial, and
construction site operators. These target audiences have been selected because (a)
they comprise nearly the total population of the community, (b) have specific impact
on stormwater runoff quality, and (c) have the ability to continue a viable stormwater
program well into the future.
Internet website:
The City will update and maintain an internet website containing information about
Stormwater issues such as: Stormwater newsletter articles, information on water
quality, stormwater project news and activities, and provide stormwater management
program staff contact information.
Outreach Program:
The program includes (1) an annual newsletter or door hanger prepared and sent to
all residents, (2) the preparation and of an elementary school education program
specifically geared for grade level (K-1, 2-3, and 4-5) to educate the school children,
(3) proposed workshops for Illicit Discharge Detection and Elimination (see below),
Low Impact Development, and Best Management Plan (BMP) installation and
maintenance, and (4) an informational web site. It is anticipated that at least 75% of
the residents of the City of Mount Holly will have direct exposure to the stormwater
education program and materials. This program will be coordinated by the
Stormwater Committee and Stormwater Coordinator.
Additional public education and outreach to the community regarding stormwater
issues is through community organizations such as the Boy Scouts of America and
Centralina Regional Stormwater Partnership. Outreach efforts will be expanded to
additional target audiences where the highest benefit can be achieved first.
The City will periodically update the list of civic organizations that may benefit from a
presentation on the Stormwater Management Plan, and inform them of presentations
availability and opportunities to serve on volunteer stormwater committees.
Evaluation:
Annual reviews of the public education and outreach program activities will be
performed to measure the program effectiveness in reaching the right audiences,
determining the right number of materials, and determining what changes to the
program should be implemented.
C. BMPs for Public Education and Outreach
The City shall implement the following BMPs to meet the objectives of the Public
Education and Outreach Program and shall notify the Division prior to modification of
any goals.
6 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

BMP -
Measurable Goals
YR
YR
YR
YR
YR'
1
2
3
4
5
Identify the target pollutant types which the
Identify Target
City's public education program is designed to
Pollutants
address and identify the target pollutant
X
sources.
Identify Target
Identify target audiences likely to have the
Audiences
greatest storm water impacts and focus
X
X
efforts to reach those audiences.
Update and maintain internet website
containing information such as: Stormwater
Maintain an
newsletter articles, information on water
Informational
quality, stormwater project news and
X
X
X
X
X
Website
activities, and provide stormwater
management program staff contact
information.
Develop and distribute general stormwater
educational materials for various target
groups as likely to have a significant
stormwater impact as well as develop and
distribute public education materials to
Public Outreach
identified target audiences. For example,
Program
schools, renters, homeowners, and/or
X
X
X
X
X
businesses. State -supplied Public Education
and Outreach materials will also be assessed.
Potential teaming efforts with other
community organizations and environmental
groups will be assessed.
Perform annual review of public education
and outreach activities to measure whether
Evaluation
the program was effective in reaching the
X
X
X
X
X
right audiences, adequacy of materials, and
what changes in the program should be
implemented.
7.2 Public Involvement and Participation
A. Responsible staff: David E. Johnson, PE, City Engineer
B. Program Section Objectives: The target audiences for public involvement include
all the same groups as for public education less students. It will be comprised of: all
adult residents, municipal employees, businesses both industrial and commercial,
and construction site operators and community organizations. The program will also
include:
Public Involvement and Participation:
This will be directed through the public Stormwater Committee and Stormwater
Coordinator.
7 City of Mount Holly
M84 Stormwater Program Annual Report 2016-2017

Public Comment on Plan:
The City will conduct at least one public meeting to present and allow the public to
review and comment on the Stormwater Plan.
Program Development and Implementation Opportunities:
The City will solicit Stormwater committee members as well as other members of the
public to aid in the development and implementation of the Stormwater Management
Program. This will be internal to the Stormwater Committee. Outside organizations
such as River Clean Sweep and Keep Mount Holly Beautiful will also be solicited, as
these audiences are primary stakeholders in the preservation of clean water. Other
specific target audiences are (1) Gaston County Quality Natural Resources
Commission (QNRC), (2) local industries, (3) local builders, and (4) the Boy Scouts
of America.
The program will also consist of a mechanism for on -going public involvement
whereby citizens' or stakeholders' group(s) may provide input on stormwater issues
and the stormwater program.
Evaluation:
An annual review will be performed to judge the effectiveness of the public
involvement and feedback program including numbers of volunteers, progress made
with the program, and identification of areas for future improvement.
C. BMPs for Public Involvement and Participation
The City shall implement the following BMPs to meet the objectives of the Public
Involvement and Participation Program and shall notify the Division prior to
modification of any goals.
BMP
Measurable Goals
YR
YR
YR
YR
YR
1
2
3
4
5 .:
Oversee and administer a volunteer
stormwater related program designed
Administer a Public
to promote ongoing citizen
Involvement
participation including some of the
X
X
X
X
X
Program
following; sponsoring and
participating in Big Sweep, Adopt a
stream, storm drain stenciling, and
Water Quality otter contest.
Provide for Public
Review and
C onduct at least one public meeting
Comment on the
to allow the public an opportunity to
X
Stormwater
review and comment on the
Management Plan
Stormwater Plan renewal.
Maintain a
Continue the Stormwater Committee
Community
and give them a new charge to
X
X
X
X
X
Involvement
educate the public about the value
Program
and importance of good water quality.
8 City of Mount Holly
MS'4 Stormwater Program Annual Report 2016-2017

BMP
Measurable Goals -'
YR
1
YR
2
YR
3
YR
4'
YR "
S
Establish an On-
Establish a mechanism for public
going Mechanism
involvement, whereby citizens' or
for Public
stakeholders' group(s) may provide
X
X
X
X
X
Comment and
input on stormwater issues and the
Involvement
stormwater program.
Evaluate Public
Perform an annual review of public
Involvement and
involvement and feedback including
Participation
numbers of volunteers, progress
X
X
X
X
X
Effectiveness
made with the program, and areas of
future improvement.
7.3 ILLICIT DISCHARGE DETECTION AND ELIMINATION (IDDE)
A. Responsible staff: James Friday, Public Utilities Department Manager
B. Program Section Objectives: This section has the goal of implementing a program
to detect and eliminate illicit discharges into the MS4. This will be implemented
through:
Storm Sewer System Map:
The storm sewer system map will be periodically updated to reflect the permittee's
major MS4 outfalls which discharge to state waters. Maps will be updated using as -
built construction plans from new development and GPS location of drainage
structures. The current storm sewer system maps are housed on the City's GIs
system. Attributes in the current storm sewer inventory, and any new data, include
location, size and type of structure, condition, depth, pipe sizes, and dry -weather
flow.
Regulatory Mechanism:
Regulatory Mechanism: In 2006 the City of Mount Holly amended the Code of
Ordinances by adding the chapter entitled "Illicit Discharge to the Storm Sewer
System." The ordinance defines illicit discharges, describes the prohibition of such
discharges, and provides authorization for discharge detection, reporting, and cost
recovery.
Enforcement:
In addition to providing the Stormwater Coordinator with authorization to detect illicit
discharges, the ordinance provides authorization to enforce the ordinance and
describes enforcement measures including denial of access to the MS4 storm sewer
system. Also included in the ordinance is the description of an appeals process by
which an alleged discharger may contest an enforcement action.
Detection and Elimination:
This program to identify the location of highest probable illicit discharges will be
developed in the first year, establishing priority areas for monitoring in subsequent
9 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

years. Thereafter, priority areas of the City will be monitored for illicit discharges.
The stormwater sewer system map will be updated with this data and used for
monitoring and reporting purposes. This program section will include:
a) procedures for prioritizing high illicit discharge potential sites
b) procedures for locating and tracing illicit discharges
c) procedures for removing the source of the discharge
Non Stormwater Discharges:
Non stormwater discharges, such as water line flushing, irrigation, diverted stream
flow, rising ground water, ground water infiltration, springs, water from crawl spaces,
swimming pool discharges, flows from riparian habitats and wetlands, and street
washing are not known to be a significant contributor of pollutants in the City;
however, these discharges will be monitored and corrected as the need arises.
Outreach:
Public employees, businesses, and the general public will be notified of hazards
associated with illicit discharges and disposal of waste through the City's website,
educational materials provided at City functions and organizational meetings, and as
in past years through the use of door hangers that are delivered during the fall leaf
season. Illicit discharge information can be disseminated in conjunction with other
educational materials previously described.
Staff Training:
Through a private training institute, the City conducts annual staff training on illicit
discharges and other stormwater related matters. The training is held in conjunction
with annual safety courses required of all field personnel.
Program Evaluation:
An annual review of the Illicit Discharge Detection and Elimination program will be
completed to evaluate its effectiveness and identify program modifications necessary
to improve its effectiveness.
C. BMPs for Illicit Discharge Detection and Elimination
The City shall implement the following BMPs, to the extent authorized by law, to
meet the objectives of the Illicit Discharge Detection and Elimination Program and
shall notify the Division prior to modification of any goals.
IVI0,00", Gbals'w
°
r�x��
Maintain Illicit
Discharge
Implement and maintain an IDDE
Detection and
Program including provisions which
X
X
X
X
X
prohibit illicit discharges and
Elimination (IDDE)
describe all available remedies.
Program
10 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

t
s
Maintain
Maintain adequate ordinances or
Appropriate Legal
other legal authorities to prohibit
X
X
X
X
X
Authorities
illicit discharges and enforce the
approved IDDE Program.
Update the map identifying major
Update the Storm
outfalls and stormwater drainage
Sewer System
system components. At a minimum,
Base Map and
components include major outfalls
X
X
X
Inventory of Major
and receiving streams. Establish
Ouffalls.
mechanism and funding to continue
to identify, locate, and update map
of drainage system.
Develop IDDE
Develop written procedures for
Detection and
detecting and tracing the sources of
Elimination
illicit discharges and for removing the
X
X
X
X
X
Procedures for Dry
sources or reporting the sources to
Weather Flows.
the State for proper permitting.
Develop training materials and
Staff Training
conduct training for appropriate
X
X
X
X
X
municipal staff on detecting and
reporting illicit discharges.
Inform public employees,
businesses, and the general public
Public Education
of hazards associated with illegal
X
X
X
X
X
discharges and improper disposal of
waste.
Establish a Public
Establish and publicize a reporting
Reporting
mechanism for the public to report
Mechanism for
illicit discharges. Establish citizen
X
X
X
X
X
IDDE
request response procedures.
7.4 CONSTRUCTION SITE RUNOFF CONTROLS
A. Responsible staff: David E. Johnson, PE, City Engineer
B. Program Section Objectives: The City of Mount Holly has the objective to reduce
and eliminate construction site erosion and sediment. It has elected to enter into an
agreement with Gaston County to administer and enforce all aspects of Construction
site Erosion and Sediment control. It includes plan review, approval, inspection and
enforcement, etc. The City believes that the existing County program adequately
addresses the potential for pollution from construction -related erosion and sediment
control and believes continuing the agreement with Gaston County is appropriate.
7.5 POST -CONSTRUCTION STORMWATER MANAGEMENT IN NEW DEVELOPMENT
AND RE -DEVELOPMENT
A. Responsible staff: David E. Johnson, PE, City Engineer
11 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

B. Program Section Objectives: The City will manage stormwater runoff from new
development / redevelopment that discharges to the MS4 and disturbs an acre or
more of land surface, including projects less than an acre that are part of a larger
common plan of development or sale.
Existing Policy:
The entire City of Mount Holly and the ETJ lie within regulated watersheds; thus, the
existing watershed overlay district ordinances in effect serve as the post construction
runoff ordinance. The watershed ordinances address imperious limits, BMP
requirements, inspection and maintenance of structural BMPs, and penalties for non-
compliance.
Existing City land development ordinances require connection to the City wastewater
system for new development, effectively controlling potential sources for fecal
coliform. There are currently no private wastewater systems within the jurisdictional
area of the City. Enforcement of compliance for domestic wastewater systems
(septic tanks) is coordinated with the Gaston County Health Department.
Non-structural BMPs:
The City has several policies in place to direct growth in certain areas and provides
standards or regulations that protect sensitive areas and maintain open space. One
such ordinance is Flood Plain Management, Section 16, in the Zoning Ordinance.
Much of the land adjacent to the Catawba River and around creeks and streams lies
within the FEMA 100-year flood plain. The model ordinance provides strict
guidelines for flood plain development, often requiring a greater expense for
construction. While not preventing development within a flood plain, this in itself
discourages building because of the regulations and requirements for a flood plain
development permit, and added expense, which ultimately protects many sensitive
areas.
The City of Mount Holly is located entirely within a watershed, whether it be a WSIV
Critical or WSIV Protected watershed along Lake Wylie or Mountain Island Lake. In
2005, the City adopted the high density option for the Lake Wylie watershed,
meaning that development is limited to 24% imperious surface unless BMPs are
installed. Under the high density option, imperious surface is allowed to increase
up to 70% in the WSIV Lake Wylie Protected area through proper installation of
BMPs. Imperious surface is allowed up to 50% in the WSIV Lake Wylie Critical
area through proper installation of BMPs. To date there has been little development
to use the high density option, but regardless, all impervious surfaces in a proposed
development is reviewed by the City's contracted engineer to insure that proper
measurements are taken and stormwater runoff is handled correctly during the
construction document review. The City did not initiate a high density option within
the Mountain Island Lake Critical Area as it is a source of drinking water for many
municipalities including Mount Holly. There is also a 100-foot undisturbed buffer
requirement on Mountain Island Lake, which is greater than the 50-foot requirement
enforced by the Division of Water Quality under DWQ Rule 15A NCAC 2B .024.
The City adopted a Strategic Vision Plan in 2007, which won a Centralina Council of
Government award as first place in Excellence in Community Planning and
12 Chy of Mount Molly
MS4 Stormwater Program Annual Report 2016-2017

Investment. The Design Guidelines for Voluntary Residential Annexation within the
Plan outline higher open space policies than those found within the Subdivision
Ordinance. Such examples are a 100-foot undisturbed buffer on both sides of all
"blue line" streams, which is far greater than the DWQ requirement. The developer
must also provide one acre of usable open space for every 20 homes. The current
Subdivision Ordinance uses a formula, which equals 4.6 acres of open space per
100 homes. The City of Mount Holly is currently working on standards to strengthen
its open space requirements across the board. Also, the Design Guidelines for
Voluntary Residential Annexation state that 10% of the entire site must be left in its
pre -construction condition, with no clear cutting allowed. A third of the large mature
trees, 18-inches in caliber or greater, must be preserved. Additionally, no massive
grading is allowed and only a 30-foot clear zone around the foundation of the home
is allowed. There have been a few proposed developments go through the approval
process under these guidelines, but the proposed developments did not pursue
construction due to the current economic conditions.
The City contracts with Gaston County Natural Resources (GCNR) for enforcement
of a city-wide Soil, Sedimentation and Erosion Control Ordinance for all development
which disturbs an acre of land or greater. This program has been very successful in
minimizing the impact due to grading and construction within 11 active subdivisions
within Mount Holly. Developers are subject to fines if violations are noted by GCNR
staff.
To encourage infill development in higher density urban areas, in March 2009 the
City Council adopted a series of rezonings for the Downtown area of Mount Holly.
The Planning Department created an overlay district, which among other things,
sought to extend downtown to an area where only larger single-family residential lots
were allowed. By allowing multi -family units into the newly created, "Residential
Downtown" district and allowing for a reduction in lot size to 36 feet in width from a
minimum of 60 feet in width, the City is encouraging infill development in and around
its central business district. This not only allows for greater economic opportunities
because a greater number of residents in an area can help to support nearby
businesses, but it also discourages sprawl. The City of Mount Holly believes that this
strategy will have many positive environmental impacts in the future. The City has
also explored sidewalk construction and greenway opportunities in its core area to
encourage alternative forms of transportation, which may also help to encourage infill
development.
To educate private developers the City of Mount Holly has a Technical Review
Committee which meets with perspective developers throughout the development
process. This includes preliminary informational meetings down to the final pre -
construction meeting. Members of the Utility Department and Planning Department
share their insights on water quality impacts, limits on impervious surface, watershed
regulations, etc. throughout the process. This helps everyone understand the
importance of stormwater mitigation and best management practices.
As previously noted above, the entire corporate limits and extraterritorial jurisdiction
(ETJ) of Mount Holly are located in a WSIV watershed, with a minimum of 24%
imperious surface allowed under a low density option. The low density option is
encouraged, but if a developer chooses to follow the rules under the high density
option, careful review procedures are followed to insure compliance. If developers
13 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

seek to reduce impervious surface, staff consults with engineers on pervious surface
alternatives, such as turf cells for parking. For example, recently an existing hotel
site indicated a desire to do turf cell pervious parking if they were allowed to expand
parking areas in the future. Based on current conditions, the City has conveyed that
this will be a requirement for parking expansion at this site. Per the current Water
Overlay District Ordinance BMP maintenance is the responsibility of the
developer/property owner. City staff is tasked with BMP inspection and directs the
responsible property owner should maintenance be required.
Structural BMPs:
The City of Mount Holly Zoning Ordinance references the use of NC DENR structural
BMPs, describes penalties for violation, establishes financial responsibility and
describes maintenance of BMPs. The type of practice used to meet treatment
standards (wet ponds, extended detention, infiltration practices, etc.) are left up to
the individual landowner. All practices used must be designed and constructed in
accordance with the latest edition of the North Carolina Division of Water Quality
Stormwater Best Management Practices Manual.
Natural Resources Protection:
The City has actively pursued measures to protect natural resources and critical
habitat. As previously noted, the Design Guidelines for Voluntary Residential
Annexation, part of the adopted Strategic Vision Plan of 2007, outline significant
policies for open space protection. While the guidelines only pertain to areas
seeking voluntary annexation into the City, Mount Holly is looking to codify particular
requirements into its Subdivision Ordinance that will be effective throughout the
corporate limits and ETJ. In addition to not allowing clear cutting or massive site
grading and requiring that all homes be built on 24-inch crawl space to help reduce
grading, the Design Guidelines also focus heavily on tree protection. If the
development is clear-cut, the developer must plant what equals to be 16, three-inch
caliper trees per acre. Ten percent of the site must left in its preconstruction
condition with a third of the large mature trees preserved. Open space credit will be
given for every 2000 linear feet of greenway constructed in a required 100-foot buffer
along streams located within the proposed development. A tree survey is required at
the time of approval noting what trees will be protected and how. The Design
Guidelines are a quid pro quo, meaning that relief MAY be granted in one area, while
another area is expected to increase. For example, if a developer states that he
cannot meet the tree save requirement due to mature trees being located on a
strategic development site within the proposed subdivision, the developer may offer
a larger open space area than required in return. The City is also in the process of
developing a full tree ordinance under the Tree City USA guidelines. A landscape
buffering ordinance is also expected to be adopted this year, which will insure the
planting of canopy trees and understory trees between new businesses and
residential property.
The City has adopted buffer zone requirements to protect water quality in and around
wetland areas, lakes, and streams. The City currently has a 100-foot undisturbed
buffer along Mountain Island Lake, which is the location of Stonewater Bay, a 420
home development, 80% of which is complete. This is double the State requirement
of a 50-foot buffer. The City maintains a 30-foot undisturbed vegetative buffer along
14 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

all blue -line streams and rivers per State standards, which has been in place for
many years. Additionally, a large tract of land located on Mountain Island Lake
owned by the City of Gastonia, is managed as a State Education Forest. This 260
acre parcel along with several other tracts of land totaling nearly 400 acres, have be
placed in conservation with no development scheduled to take place except
greenways and possibly an education center. The FEMA model Flood Plain
Management Ordinance adopted by the City in 2007, controls the development of
structures within the 100-year flood plain through regulation and enforcement.
While not a policy but a practice, the City looks for grant opportunities to protect its
source water areas and other sensitive areas. A few years ago the City of Mount
Holly acquired over 250 acres of land along the Catawba River through a Clean
Water Management Trust Fund grant, which insures no development (with the
exception of greenway construction) will take place within this most sensitive area, a
$2.1 million purchase. The City also purchased 33 acres of land along the Catawba
River, adjacent to the 10-acre Tuckaseege Park, which is wrapping up a $1.3 million
addition. The addition includes a 1 mile greenway loop, large grass playing field, dog
park and other amenities. This was done through a $500,000 PART-F grant. The
City will continue to look at other grant opportunities for open space and drinking
water protection. Existing watershed ordinances effectively control development
near the sensitive Mountain Island Lake water supply, establishing maximum limits
on impervious areas and a minimum 100-foot buffer.
Oven Space Protecom
The City of Mount Holly has several greenfield areas throughout the City, located in
its parks, which total nearly 400 acres_ Additionally, the subdivisions built after the
year 2000 were required to provide open space with the formula (number of
units/dwellings) X (average person per dwelling unit for area based on Census data)
X 0.02. The average person per dwelling unit is 2.5 for Mount Holly based on the
2010 Census. For a 100 home development this means 5.0 acres of open space are
required. The Dutchman's Meadow subdivision, a 175-home development that has
been completed, has nearly half of its total acreage dedicated as open space,
equaling 40 acres. The development won an Audubon Award for their cluster
development and preservation of trees and bird habitat. Nearly all of the open space
lies adjacent to Dutchman's Creek, a large tributary of the Catawba River. Its
usability may be questioned, but there is little doubt that the open space serves as a
great area for the infiltration and purification of stormwater.
Tree Preservation:
The City of Mount Holly requires that 4 trees (2-inch caliper dbh) be planted per lot
within a subdivision, with 3 trees on lots within cul-de-sacs. This measure is found
within the Subdivision Ordinance. Additionally 10 trees must be planted for every
one acre of open space. Credit is given for trees left in open space areas. As
previously mentioned, the City limits clearing of trees in the current Design
Guidelines for Voluntary Residential Annexation. Street trees are encouraged every
40 feet within new subdivisions. The City recently adopted a very strict permit
requirement for the trimming of trees within the public right-of-way along streets.
This is to insure that trees are pruned properly to ANSI 300 Guidelines, thus
15 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

prolonging their life and benefit to the City. The City is currently researching a full
scale tree ordinance to protect this valuable natural resource.
The City has researched a measure to regulate trees on private property, but it was
not the desire of City Council to impose greater restrictions on individual property
owners. For new development, the Subdivision Ordinance and its tree planting
requirements apply to developments that have 5 or more lots. The required trees are
subject to a one-year warranty period once they are planted, and damaged or
diseased trees on individual lots within a development that are covered under the
warranty period must be replaced by the developer.
The City has encouraged the State to allow the planting of street trees in the public
right-of-way for two major enhancement projects that the City is currently pursuing.
However, NCDOT's firm stance is that no street trees will be allowed in the NCDOT
r-o-w because of liability issues, as trees are stationary objects. The State applies
the same rational to a tree as they would a brick monument sign in the right-of-way;
they are simply not allowed as an accident could be made much worse if the clear
zone has stationary objects inside of it. There are also issues of planting trees
where utility lines are located as when they mature, limbs can break and cause
power outages or worse_ The City does however, encourage the planting of street
trees in subdivisions, along city -maintained streets, if there are no issues with utility
lines. All utilities are required to be located underground within new subdivisions, a
standard enforced since 1990; thus, interference with overhead utilities is no longer
an issue.
Rede ment:
The City has actively pursued redevelopment of existing properties. The City moved
into a nearly 80,000 square foot rehabilitated textile mill in June of 2008. This 18-
month process, a nearly $8 million project, saw the complete renovation of the mill
into a Citizens Center, which now houses the Police Department, City Administration
offices, meeting facilities, and 12,000 square feet of marketable retail space. Other
projects that have come to the City for redevelopment purposes include three historic
mills. The State denied funding of historic tax credits for one project, but may
approve funding for another mill redevelopment into office space. The new owner of
a former Burlington Plant, a large textile mill, has begun renovating the space for
additional occupants. The former Police Department and old City Hall are being
marketed for sale as reuse projects, with the Police Department being a former
operations center and the old City Hall being a former textile administration building.
A former petrol depot and a former gas station are currently undergoing
environmental cleanup so that the land can be sold as usable retail development
within Mount Holly. The City has budgeted for Economic Development and an
inventory has been taken of vacant and abandoned buildings throughout the City
that can be marketed as reuse projects.
Development in Areas with Existing Infrastructure:
The City has its own water and sewer systems. All development is required to
connect to these systems. The City charges system development fees for new
homes ($4,597 per home) and a new allocation fee of $975 per new home which will
help with the cost of maintenance and expansion of our utility systems. A Water and
16 City of Mount Holly
MS4 Stormwater Program Annual Report 201 b-2017

Sewer Study was done in 2000 to study future areas of growth and plan
infrastructure for them. Gaston County does not have a county -wide water and
sewer system, which tends to focus the attention of developers in the area to Mount
Holly's utility systems.
Mire se Development:
In October 2008, the City initiated a series of mandatory rezonings in the area
around Interstate 85. Much of this land was zoned for large single-family lots, some
with a minimum lot size of 2 acres. Planning staff recommended that an overlay
district be established in this area to allow for smaller lot sizes, many with no
minimum requirement, and no restrictive or prohibitive setback regulations. A large
portion of this overlay was rezoned from single-family to a Mixed -Use District. The
hope is that future commercial developments will take advantage of the new zoning
in this area, the proximity to the interstate, and the smaller lot sizes. Connecting
streets with sidewalks along both sides are proposed as part of the overall project as
this will encourage other forms of transportation, such as walking or biking when the
area is developed.
As previously noted, in March 2009 the City Council adopted a series of rezonings
for the downtown areas of Mount Holly. These rezonings allowed multi -family units
in the newly created "Residential Downtown". The goal of the rezonings is to reduce
traffic and promote pedestrian traffic by placing development near downtown shops,
businesses, restaurants, and other amenities.
Street Desiqn:
Mount Holly has adopted the NCDOT Standards for Subdivisions as part of the
Subdivision Ordinance. It holds the standard to 12-foot travel lanes. However, as
part of conditional district rezonings, several developments have been allowed to
have 11-foot travel lanes to reduce impervious area. New guidelines for subdivisions
seeking voluntary residential annexation will allow for narrower street widths which
will also serve to reduce impervious area.
No reduction of driveway widths or shared driveways has been imposed from an
ordinance standpoint within Mount Holly. However, if an applicant were to propose
this as part of a development project, Mount Holly would entertain the notion as it
reduces stormwater runoff from the site.
Green Infrastructure E[nrgts and Street Desian:
The City is currently working on the third phase of a street resurfacing program.
While there are no plans to use green infrastructure with these resurfacing projects,
the City is currently looking at green improvements as part of specific projects. For
example, improvements are proposed on East Central Avenue near the newly
remodeled Citizen Center. These improvements will include trees and landscaping
along the street to promote pedestrian activity, and removal of impervious parking
areas along the street. The City is working with NCDOT on potential funding and
grants to remove portions of NC 27 and install landscaped islands. Mount Holly is
working on an energy audit for city -owned buildings with Centralina COG that will
identify green improvements that could be made on or within these buildings.
17 city of Mount Holly
MS4 Storm water Program Annual Report 2016-2017

Maintenance issues will also be addressed in this energy audit. Last year, a MPA
student did research on a solar panel project for the new Citizens Center as part of
her internship. It was determined that the solar panel project will be cost prohibitive,
and the City would not see a return on its investment for nearly 100 years. The
energy savings also proved to be minimal. Mount Holly is also participating in the
Catawba River District, which is an organization created by public and private groups
in order to create a framework for environmentally sustainable building, development
and redevelopment practices along the Catawba River. As part of the CRD's work to
preserve water quality and the environment, it will provide public education on green
building, landscape planning and maintenance practices. Future ordinance
requirements or a future overlay district that encourage green development within
subdivisions could be created in Mount Holly based on discussions within the
Catawba River District organization.
Currently, no requirements are in place to enforce the use of pervious materials for
paving areas. City Planning Staff has contacted business owners and provided
material on pervious parking lots in the past, but the owners chose not to build or go
with impervious material. Education is the key to make the public understand the
environmental benefits and staff will continue to offer suggestions for pervious
materials when the opportunity arises.
Reduced Parking Requirements:
The City of Mount Holly Zoning Ordinance does allow for shared parking between
businesses to promote reduction of impervious area. The parking requirements also
mandate the planting of a canopy tree for every twelve spaces. This requirement
could be expanded under a proposed Landscape Design Ordinance as trees are not
only aesthetically pleasing, they can help reduce runoff in large parking areas if the
planting areas are designed properly. The parking requirements found in the
Ordinance are not excessive. On -street parking is allowed and encouraged within
the central business district.
Transportation Demand Management Alternatives:
The Mount Holly Planning Department works directly with the Gaston County
Metropolitan Planning Organization or MPO, which handles the transportation
planning for the County. The Planning Department has a staff person dedicated to
transportation planning. This gives the City the advantage of having a qualified
individual look at all possible transportation improvement that may be available.
Recently, proposed park -and -ride lots for the CATS bus system (Charlotte Area
Transit System) were proposed in the Belmont/Mount Holly area. Staff is working
with adjacent towns to secure a lot, which ultimately will encourage area residents
who work in Charlotte to use this bus system as an alternative form of transportation.
This will reduce the number of vehicles on the road and reduce the parking demand
for areas along the bus route. With a population of approximately 13,600 people,
Mount Holly does not have the demand at this point for its own bus system, flexible
work schedules, etc. There are few apartment or condo projects in Mount Holly, so
separate space leasing arrangements for these areas would not have a significant
transportation impact in the area.
18 City of Mount Holly
M94 Slormwater Program Annual Report 2016-2017

Minimizing Stormwater from Parking Lots:
As noted above, Mount Holly requires one canopy tree for every twelve parking
spaces. he Planning Department was heavily involved with the Unified Development
Ordinance adopted by Gaston County. Mount Holly could benefit from the County's
section on parking lot standards in the UDO as more trees were required. As the
Zoning Ordinance is updated throughout this year, staff will be looking at how to
incorporate higher standards. Currently, 25-foot buffers are required between
business and residential property. These buffers must be 90% opaque if they are
vegetative in nature. Vegetative buffers help reduce runoff between properties, and
more stringent standards are being reviewed by staff. As previously noted the entire
City and the ETJ lie with regulated watersheds, so Best Management Practices
would be required by ordinance for any additional impervious parking areas created.
Green Infrastructure Practices:
Green infrastructure practices have been studied by the Planning Department Staff.
Sessions on these types of stormwater management have been offered at nearly
every NC American Planning Association Conference over the past few years. The
City of Mount Holly Zoning Ordinance references the use of NC DENR approved
BMPs. All practices used must be designed and constructed in accordance with the
latest edition of the North Carolina Division of Water Quality Stormwater Best
Management Practices Manual. However, flexibility is given to the developer as to
what approved practices he chooses to use for stormwater management. More wet
detention basins have been installed than other practices. There has been little
desire from the development community to install rain gardens or stormwater
wetlands, which could be considered more "green" in their construction.
The City Code currently has little impediments to using green infrastructure for
stormwater practices and encourages their use. For example, the City has
encouraged the use of rain barrels and cisterns, especially as a drought
management tool.
The City staff addresses stormwater management issues early in the development
review process. The City of Mount Holly has a Technical Review Committee which
meets with perspective developers throughout the development process. This
includes preliminary informational meetings down to the final pre -construction
meeting. Members of the Utility Department and Planning Department share their
insights on water quality impacts, limits on impervious surface, watershed
regulations, etc, throughout the process. This helps everyone understand the
importance of stormwater mitigation and best management practices. The City
contracts with a private consultant to review the construction documents once they
are prepared to insure compliance with stormwater regulations among other things.
As the City takes part in more "green infrastructure" movements, such as the
Catawba River District mentioned above, staff can offer more suggestions from a
green standpoint, possibly including green requirements under future ordinances,
with a requirement that the green requirements be discussed early in the planning
process (at time of rezoning, preliminary site plan, etc.).
19 City of Mount holly
MS4 Stormwater Program Annual Report 2016-2017

The use of rain barrels was encouraged under the last severe drought the City and
entire region experienced as the use of water for non -potable uses (Le, irrigation,
car -washing) was strictly prohibited with fines levied against violators within the City.
The Public Utilities Department began research during the last drought by pricing
rain barrels for individual homeowners to be given out by the City. However, it was
cost -prohibitive from a budgetary standpoint. Many property owners purchased rain
barrels after local news stations and newspapers encouraged their use. The City
has seen an indication that even after the drought ended and water restrictions were
lowered, Mount Holly residents continue to restrict their water use.
Mount Holly currently has no alternative stormwater programs, such as off -site
management or payment -in -lieu, as the current system has worked successful and is
practical.
Maintenance/Enforcement:
To date there have been only a couple of sites within the City that required
stormwater practices. These existing stormwater practices are visible from the street
right-of-way and easily accessible. Maintenance issues may be reported by the
general public, or by City staff during routine inspection of the stormwater facility or
adjoining infrastructure. By ordinance, maintenance of stormwater facilities are
required of the landowner, with fines issued for non-compliance.
Green Infrastructure Strategies:
As previously noted in the report, the City has implemented design guidelines for
new subdivisions requesting annexation. The new guidelines include "greener"
policies as more tree planting per lot and prohibit mass grading. The City is an
active participate in the Catawba River District organization, which is constantly
working to create a framework for environmental activity along the Catawba River.
As ordinances are reviewed and updated, the City is investigating refinements to the
tree ordinance as it applies to parking areas and other development in the City. A
landscaping buffering requirement is being researched with implementation
forthcoming. Being an old mill town, possibilities for re -use of existing textile facilities
are continuously investigated. Situated along the banks of the Catawba the City
accepts the challenge to promote green infrastructure to enhance and protect the
environment along the river.
20 Qy of Mount Holly
MS4 Stormwater Program Annual Report 2016-201 7

C. BMPs for Post Construction Storm Water Management in New Development
and Redevelopment
The City shall implement the following BMPs, to the extent authorized by law, to
meet the objectives of post construction storm water management, and shall notify
the Division prior to modification of any goals.
�:
■■�� t6
d hi � �eaffUrab�e Goat�,� � £^� E
i
Y
Y y J
i .{iP,�
g9L.'[
Require annual inspection of existing
BMPs by qualified personnel and
Maintain existing
notify responsible parties of any
BMPs
defeciencies. Ensure controls are in
X
X
X
X
X
place to minimize water quality
impacts.
Complete review of plans and
Review and
calculations. Inspect or require
approve newly
inspection of completed facilities by
X
X
X
X
X
installed BMPs
qualified personnel prior to issuance of
certificate of occupancy.
Compliance with
Perform periodic inspection of
existing tree
completed subdivisions to assure
X
X
X
ordinances
compliance.
Maintain existing
Periodically review and update existing
landscaping
ordinances for buffers, parking areas,
X
X
ordinances
ordinances
new development, and re -
Advise new development on designs
BMP Education
X
X
X
X
X
to minimize water quality impacts
Maintain program to
Continue oversight to ensure proper
control sources of
operation and maintenance of on -site
fecal coliform to the
wastewater treatment systems for
X
X
X
X
X
domestic wastewater. Coordinate this
maximum extent
program with the County Health
practical
Department.
7.6 POLLUTION PREVENTION/GOOD HOUSEKEEPING FOR MUNICIPAL OPERATIONS
A. Responsible staff: David E. Johnson, PE, City Engineer
B. Program Section Objectives: The City will develop and implement an operation
and maintenance program that includes a training component and has the ultimate
goal of preventing or reducing pollutant runoff from municipal operations.
Affected Operations:
The City currently has no operations that would be classified as industrial under
NPDES guidelines. The City -owned facilities are not subject to any NPDES General
or individual permits.
21 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017

Training:
The City contracts with a private training institute to complete training for the pollution
prevention/good housekeeping aspects of the stormwater program. This training is
conducted annually in conjunction with the City required safety training. Staff are
versed in hazards of illicit discharges, detection, and reporting.
Maintenance and Inspections:
The City has in place a street cleaning program whereas all City streets are
mechanically cleaned a minimum of once a month. Stormwater grates throughout
the City are inspected and cleaned monthly, after heavy rain events, and
approximately twice monthly during the fall leaf season. Other deficiencies are
corrected as they become apparent as identified by the public comment or by routine
inspections.
Vehicular Operations:
The City has a small maintenance facility that completes mainly routine maintenance
activities. The City fleet is of a size that these maintenance activities are not
classified as industrial in nature. Recyclables such as oil, oil filters, and antifreeze
are collected and picked up by an outside contracted company. Fuel for vehicles is
obtained from private vendors. The City has no fuel delivery systems or fuel storage
areas.
The City maintains a small storage yard. Materials are predominantly ordered as
needed and not stored at the facility. Only small amounts of construction materials
such as sand and stone (approximately one truck load) are kept on hand. The City
does not distribute salt on City streets thus they do not have a salt storage area.
Waste Disposal:
Spoil and accumulated sediments resulting from maintenance activities are disposed
in debris landfill sites in the County. Trash and other debris are first removed from
the spoils and placed with the regular garbage materials that are transported to the
County sanitary landfill.
22 City of Mount holly
MS4 Stormwater Program Annual Report 2016-2017

C. BMPs for Pollution Prevention/Good Housekeeping for Municipal Operations
The City shall implement the following BMPs, to the extent authorized by law, to
meet the objectives of pollution prevention/good housekeeping for municipal
operations, and shall notify the Division prior to modification of any goals.
t a' itX
�'� y � Y✓ ��a2��0.Ai�e Go��sfr�l ��
�
YR ZFy
A.('lR
M Y�&
V� 1.
Ala ��� _. ��.
.�
3M�
2 YL i
� _Y
�
Develop an
Development an operation and
operation and
maintenance program that has the
maintenance
ultimate goal of preventing or
X
X
X
X
X
reducing pollutant runoff from
program
municipal operations.
Develop an inventory of all facilities
and operations owned and operated
by the permittee with the potential
Inspection and
for generating polluted stormwater
evaluation of
runoff, including the MS4 system
facilities,
and associated structural BMPs.
operations, and the
Inspect potential sources of polluted
X
X
X
X
X
MS4 system and
runoff, the stormwater controls, and
associated
conveyance systems. Evaluate the
structural BMPs
sources, document deficiencies,
plan corrective actions, and
document the accomplishment of
corrective actions.
Conduct Staff
Conduct staff training specific for
Training
pollution prevention and good
X
X
X
X
X
housekeeping procedures.
23 City of Mount Holly
MS4 Stormwater Program Annual Report 2016-2017