NCS000584_SWMP 2018_20200720

COMPREHENSIVE STORMWATER
MANAGEMENT PLAN
FOR
THE CITY OF LEXINGTON
JUNE 2018

TABLE OF CONTENTS
Tableof Contents.............................................................................................................ii
Definitions....................................................................................................................... v
1 Storm Sewer System Information............................................................................. 6
1.1 MS4 Conveyance System.................................................................................... 6
1.2 Land Use Composition Estimates: ........................................................................ 6
1.3 Estimate Methodology: ......................................................................................... 6
1.4 TMDL Identification............................................................................................... 6
2 Receiving Streams.................................................................................................... 7
3 Existing Water Quality Programs.............................................................................. 7
3.1 Local Programs: ................................................................................................... 8
3.2 State Programs: .................................................................................................... 8
4 Permitting Information. (Responsible Contacts) ................................................... 9
4.2 - Organizational Chart..............................................................................10
5 Co -Permitting Information....................................................................................... 11
6 Reliance on other government entity to satisfy one or more permit obligations ...... 12
7 Stormwater Management Program......................................................................... 13
7.1 Public Education and Outreach on Storm Water Impacts ................................... 13
7.1.1 BMP Summary Table....................................................................................... 13
7.1.2 Target Audience.............................................................................................. 15
7.1.3 Target Pollutant Sources................................................................................. 15
7.1.4 Outreach Program........................................................................................... 15
7.1.5 Decision Process............................................................................................. 15
7.1.6 Evaluation........................................................................................................ 15
7.2 Public Involvement and Participation.................................................................. 16
7.2.1 BMP Summary Table....................................................................................... 16
7.2.2 Target Audience.............................................................................................. 17

7.2.3 Participation Program...................................................................................... 17
7.2.4 Decision Process............................................................................................. 17
7.2.5 Evaluation........................................................................................................ 17
7.3
Illicit Discharge Detection and Elimination..........................................................
18
7.3.1
BMP Summary Table.......................................................................................
18
7.3.2
Storm Sewer System Map...............................................................................
19
7.3.3
Regulatory Mechanism....................................................................................
19
7.3.4
Enforcement: ...................................................................................................
19
7.3.5
Detection and Elimination................................................................................
19
7.3.6 Non Stormwater Discharges............................................................................ 20
7.3.7 Outreach.......................................................................................................... 20
7.3.8 Decision Process............................................................................................. 20
7.3.9 Evaluation........................................................................................................ 20
7.4 Construction Site Stormwater Runoff Control ..................................................... 20
7.5 Post -Construction Storm Water Management in New Development and
Redevelopment.................................................................................................. 21
7.5.1 BMP Summary Table....................................................................................... 21
7.5.2 Stormwater Management Options................................................................... 22
7.5.3 Non -Structural BMP's...................................................................................... 22
7.5.4 Structural BMPs............................................................................................... 22
7.5.5 Regulatory Mechanism.................................................................................... 22
7.5.6
Operation and Maintenance.............................................................................
22
7.5.7
Education.........................................................................................................22
7.5.8
Decision Process.............................................................................................
22
7.5.9
Evaluation........................................................................................................
23
7.6
Pollution Prevention/Good Housekeeping for Municipal Operations ..................
24
7.6.1
BMP Summary Table.......................................................................................
24
7.6.2
Affected Operations.........................................................................................
25
7.6.3
Training............................................................................................................25
7.6.4
Maintenance and Inspections..........................................................................
25
7.6.5
Vehicular Operations.......................................................................................
26
7.6.6
Waste Disposal................................................................................................
26

7.6.7 Flood Management Projects............................................................................ 26
7.6.8 Decision Process............................................................................................. 26
7.6.9 Evaluation........................................................................................................ 26
7.7 Total Maximum Daily Loads (TMDL).................................................................. 27
7.7.1 BMP Summary Table....................................................................................... 27
7.7.2 Determination of TMDL's................................................................................. 28
7.7.3 Establishing a Water Quality Recovery Plan .................................................... 28
7.7.4 Decision Process............................................................................................. 28
7.7.5 Evaluation........................................................................................................ 28
IV

DEFINITIONS
BMP — Best Management Practice also known as a Stormwater Control Measure
DEMLR — Division of Energy, Mining, and Land Resources
DEQ — Department of Environmental Quality (formerly DENR)
EPA — Environmental Protection Agency
Illicit Discharge — Any discharge to an MS4 that is not entirely composed of stormwater.
Exceptions include discharges from NPDES-Permitted industrial sources and
discharges from fire -fighting activities
MS4 — Municipal Separate Storm Sewer System. A conveyance or system of
conveyances (including roads with drainage systems, municipal streets, catch basins
curbs, gutters, ditches, manmade channels, or storm drains)
NPDES — National Pollutant Discharge Elimination System
SCM — Stormwater Control Measure
TMDL — Total Maximum Daily Load
Lexington Fire Department HQ
In
LEXINGTON CITY HALL

COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
1 STORM SEWER SYSTEM INFORMATION
Population Served: 18,532 (2016 NC Dept. Of Budget & Management)
Annual Growth Rate: -2.1 % (2010-2016 NC Dept. Of Budget & Management)
Jurisdictional and MS4 Service Areas: Jurisdictional area: 18.0 square miles,
MS4: _9.5 square miles
1.1 MS4 CONVEYANCE SYSTEM
The City of Lexington MS4 consists of a combination of storm drain piping, roadside
ditches, and sheet flow. New developments are required by City ordinance to have curb
and gutter drainage systems except low density projects that can have grass lined
drainage ditches and swales. High density developments are required to treat the first 1"
of runoff from the developed property. City streets are maintained by the City's Street
Department. State roads are maintained and managed by NCDOT.
1.2 LAND USE COMPOSITION ESTIMATES:
Residential:
56%
Commercial:
21 %
Industrial:
23%
1.3 ESTIMATE METHODOLOGY.
The land use estimate was based on the City of Lexington GIS Mapping (see City for
Update)
1.4 TMDL IDENTIFICATION
Lexington is in the Yadkin- Pee- Dee River Basin
Swearing Creek and Abbots Creek pass within or in the edge of Lexington's jurisdiction
and are listed on the "2014 Category 5 Water Quality Assessments 303(d) List".
However, no TMDLs for these streams have been established at this time.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
2 RECEIVING STREAMS
Table 1. Yadkin Pee -Dee River Basin
Receiving Stream Name
Stream
Segment
Water Quality
Classification
Overall
Category
Use Support
Rating
Water
Quality
Issues
Swearing Creek
12-113
C
5
Impaired
3,5
Rat Spring Branch
12-113-5
C
ND
-
-
Tar Creek
12-113-6
C
ND
-
-
North Potts Creek
(Michaels Branch)
12-113-3
C
ND
-
-
Abbotts Creek
12-119-(6)b
C
5
Impaired
5
Abbotts Creek
12-118.5
WS-V, B
5
Impaired
3,4,5
All Ratings and Data based on Final 2014 Integrated Report & 2016 303d List published by NC DWQ.
ND - No Data
Aquatic life and secondary recreation
2 Fish consumption
3 On 303(d) list
4 Fecal Coliform, Copper, Nutrients, Ecological/Biological Integrity of Fish and Benthos
5 Ecological/biological Integrity of Benthos
Page 7

COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
3 EXISTING WATER QUALITY PROGRAMS
3.1 LOCAL PROGRAMS:
The City of Lexington is currently implementing an EPA and NCDEQ required NPDES
Phase II Stormwater Program.
3.2 STATE PROGRAMS:
NCDEQ implements the NC Erosion and Sediment Control Program within the City of
Lexington.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
4 PERMITTING INFORMATION.
Table 2. Responsible Contacts
Position
Name
Phone No.
Fax No.
Email
City Manager
Alan Carson
[phone]
JACarson(cDLexingtonNC.gov
Assistant City
Manager
Terra Greene
[phone]
[e-mail]
Public Services
Manager
Roger Jones, P.E.
(336)-248-3930
RDJones(a)LexingtonNC.gov
Civil Engineer
Laura Vanhoy
[phone]
1Ivan hov(a)lexingtonnc.gov
Consultant
Engineer
Josh Johnson, P.E.
[phone]
[phone]
Lslohnson(c�awck.com
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
4.2 Organizational Chart
Lexington
City Council
City Manager
Alan Carson
Assistant City Manager
Terra Greene
Public Services Manager
Water Resources * Public Works
* Engineering
Roger Jones, P.E.
Signing Official: City Manager — Alan Carson
Duly Authorized Representative: NA
Page 10
CITY OF LEXINGTON

COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
5 CO -PERMITTING INFORMATION
Not applicable
Page 11
CITY OF LEXINGTON

COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
6 RELIANCE ON OTHER GOVERNMENT ENTITY TO SATISFY ONE OR MORE PERMIT OBLIGATIONS
The City of Lexington will rely on the State Erosion and Sediment Control Program and
the Department of Water Quality's general stormwater permit program for construction
activities to meet the construction site stormwater runoff control requirement. There are
no legal agreements in place to establish responsibilities.
The City also contracts with the Piedmont Triad Regional Council's Stormwater Smart
program. The program handles most of the City's educational responsibilities.
Contact Information:
NC Sedimentation and Erosion Control Program
Winston-Salem Regional Office
Matthew Gantt, P.E. (status pending)
450 West Hanes Mill Rd. Suite 300
Winston-Salem, NC 27107-7407
336/776-9800 / 336-776-9654
Piedmont Triad Regional Council
Stormwater Smart
Lindsey Lengyel
1398 Carrollton Crossing Drive, Kernersville, NC 27284
[phone]
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7 STORMWATER MANAGEMENT PROGRAM
7.1 PUBLIC EDUCATION AND OUTREACH ON STORM WATER IMPACTS
7.1.1 BMP Summary Table
BMP
Measurable Goals
YIR
Y2R
Y3R
Responsible Position/Party
4R
5R
Set goals and objectives
Set outreach activities goals and report annually.
X
X
X
X
Public Services Manager
Civil Engineer
Stormwater Smart
Develop an education plan
Develop an education plan. Include in Plan the BMPs, schedule,
X
X
X
X
Public Services Manager
targeted audiences, and measurable goals. Summarize plan
Civil Engineer
and implementation progress in each annual report.
Stormwater Smart
School Programs
Provide a school children education program. Focus on basic
X
X
X
X
X
Public Services Manager
messages regarding clean water and the things they can do at
Civil Engineer
home to help. Track the number of children reached and the
subject covered and report annually.
Stormwater Smart
Identify Target Audience &
Note target audience and target pollutants in education plan and
X
X
X
X
Public Services Manager
Target Pollutants
CWSMP.
Civil Engineer
Stormwater Smart
Distribute public education
Distribute assorted stormwater materials to public. To be done
X
X
X
X
X
Public Services Manager
materials to identified
by both City and Stormwater Smart. In year 3, distribute bilingual
Civil Engineer
target audiences.
mailer for insert in utility bills. Target homeowners and
businesses with messages about how they can reduce pollution
Stormwater Smart
picked up by stormwater. Track number of homes and
businesses reached by mailer and report annually.
Information Stormwater
Provide a website page on City website and link to other
X
X
X
X
X
Public Services Manager
Website
stormwater websites. Give tips on reducing pollution. Report
Public Services Administration
annually.
Festivals, parades, local
Participate in local festivals annually by providing a stormwater
X
X
X
X
X
Civil Engineer
fairs
information booth. Provide bilingual messages as necessary on
Stormwater Smart
the importance of clean water and on specific activities that can
be carried out to help keep stormwater clean.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
Business and Industry
Implement a program for educating business and industry using
X
X
Public Services Manager
education and outreach
brochures or pamphlets and report annually on number of
Civil Engineer
businesses reached and number of employees educated. Focus
on workplace issues to reduce pollutant loading. Target hot spot
Stormwater Smart
businesses.
Residential education and
Implement a program for educating homeowners. Distribute
X
X
X
X
X
Public Services Manager
outreach
homeowner's guide to new home buyers.
Civil Engineer
Stormwater Smart
Public Contact through
Advertise Stormwater events and public education through Local
X
X
X
X
Public Services Manager
Cable Public Access
Cable Public Access Chanel 13
Public Services Administration
Helpline / Hotline
All stormwater related calls will be forwarded to the Public
X
X
X
X
X
Public Services Manager
[phone] — 8-5 am
Services Manager who will then distribute the information to
Public Services Administration
other employees.
Public Services Adm.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.1.2 Target Audience
Lexington's primary Stormwater audiences will be the city's residents and school
children. The secondary audiences will include local businesses (including gas
station owners and landscaping companies) and industry. These will be targeted
because these groups have the most impact on stormwater pollution prevention.
7.1.3 Target Pollutant Sources
The education program will target total suspended solids and nutrient loading
because turbidity, sedimentation, and nutrients are the pollutants of concern in
downstream waters. In addition, floatables, trash, and debris will also be targeted.
The education program will also address the proper use and disposal of typical
household hazardous wastes such as household chemicals, garden chemicals,
and used motor oil.
7.1.4 Outreach Program
School programs, printed materials to be distributed via mail, public events, and
participation in state and regionally organized cleanup programs will be used to
reach the target audience. By using these methods, the education program will be
expected to reach all residents of Lexington, as well as those that do business
here, over the course of the five year permit period. As a result of this outreach
program, the target audience will be informed of the importance of reducing storm
water pollution and ways they can incorporate pollution reduction in their daily
lives.
Direct Education is used due to availability of the cooperative stormwater
education program of Stormwater Smart, additionally mass media can be added
with the availability of Local cable access channel 13.
7.1.5 Decision Process
The formation of the storm water public education and outreach program will be
based on the mechanisms currently in place, and their means and effectiveness
of communicating and educating the public about the issues of stormwater
pollution prevention. Each of the BMP's selected will be judged to be an effective
and economical tool for educating the general public and/or specific groups within
the community, with a specific measurable goal with which to gauge its
effectiveness.
7.1.6 Evaluation
The education and outreach program will be evaluated based on how each
individual BMP is meeting its measurable goal at the end of each reporting period.
Changes will be considered for any BMPs that are not meeting the measurable
goals.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.2 PUBLIC INVOLVEMENT AND PARTICIPATION
.2.1 BMP Summary Table
BMP
Measurable Goals
YIR
Y2R
Y3R
4R
5R
Responsible Position/Panty
Mechanism for Public Involvement
A public meeting will be held annually to discuss the
X
X
X
X
Public Services Manager
stormwater permit. This meeting will provide the public
Civil Engineer
with the opportunity to be involved with the stormwater
program and will serve as a better conduit for public
input than the stormwater committee used previously.
More meetings may be held if public involvement is
substantial.
Volunteer Stormwater Program
The City will promote various volunteer stormwater
X
X
X
X
X
Public Services Manager
programs annually. These may include Big Sweep,
Civil Engineer
Adopt -A -Stream programs, Brown Cart Recycling
Program and Storm Drain Stenciling. The number of
Stormwater Smart
participants will be reported annually.
Helpline / Hotline
All stormwater related calls will be forwarded to the
X
X
X
X
X
Public Services Manager
[phone] — 8-5 am
stormwater hotline/helpline who will then distribute the
Public Services Administration
information to other employees.
Public Services Adm.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.2.2 Target Audience
A Public meeting was held prior to year one and the City will hold an annual public
meeting rather than trying to solicit stormwater committee members. The public
meetings will allow the public an opportunity to review the stormwater management
program and will target all interested and affected members of the Lexington
community. Additional meetings may be held if public involvement is substantial.
7.2.3 Participation Program
The public was originally involved in the development of the stormwater permit and
management program through a public hearing. Public participation opportunities
will be implemented throughout the life of the permit through the Volunteer
Stormwater Programs and the Annual Public Meeting.
7.2.4 Decision Process
A public meeting is necessary for public participation and input. The other BMPs
were selected to give the public a choice of both active and passive participation
roles.
7.2.5 Evaluation
The Public Involvement and Participation program will be evaluated based on how
each individual BMP is meeting its measurable goal at the end of each reporting
period. Changes will be considered for any BMPs that are not meeting the
measurable goals.
Page 17

COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.3 ILLICIT DISCHARGE DETECTION AND ELIMINATION
.3.1 BMP Summary Table
BMP
Measurable Goals
YIR
Y2R
Y3R
4R
5R
Responsible Position/Party
Verify / Review adequate legal
Review Illicit Discharge Ordinance and make any
X
X
City Attorney
authorities
necessary revisions.
Public Services Manager
Civil Engineer
Review Illicit Discharge Program
Review Illicit Discharge Program and make any
X
X
Public Services Manager
necessary revisions.
Civil Engineer
Storm sewer system map showing
Maintain system map in support of inspection program.
X
X
X
X
X
Civil Engineer
outfalls and the receiving body of
The map will note outfalls and receiving body of water
water previously completed.
for each outfall. Report annually on progress.
Investigate sources of identified illicit
Develop written procedures for how to investigate illicit
X
X
X
X
Public Services Manager
discharges
discharges.
Civil Engineer
Public Services Administration
Track and document illicit discharges
Document illicit discharge investigations through
X
X
X
X
X
Civil Engineer
and their investigations
paperwork and within the MS4 Map.
Train employees on how to inspect
Provide materials to all public employees in illicit
X
X
X
X
Public Services Manager
for illicit connections and establish a
connections and how to recognize one. Summarize in
Civil Engineer
tracking system for managing
annual report.
reported problem areas.
Dry Weather Flow Detection
Dry Weather testing will be done at least bi-annually in
X
X
X
Civil Engineer
accordance with the IDDE program, dependent upon
other IDDE investigations.
Public reporting mechanism
All stormwater related calls, overflows, failed septic
X
X
X
X
Public Services Manager
Helpline / Hotline
systems will be forwarded to PSA Team and then to
the Public Services Manager who will then distribute
Public Services Administration
[phone] — 8-5 am
the information to other employees.
Page 18

COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.3.2 Storm Sewer System Map
Storm sewer system has been mapped and will be inspected during the course of
normal maintenance operations by the Street Department. The route of the
system, locations of pipes, drainage ditches, and outfalls will be maintained on a
paper map and/or electronic map. The map will be updated as needed during
subsequent maintenance operations.
7.3.3 Regulatory Mechanism
The City has an Illicit Discharge Ordinance which allows for inspection,
maintenance, and prohibits illicit discharges.
7.3.4 Enforcement:
There are provisions in the amended ordinance for enforcement actions and
penalties for dumping, spills, and willful illicit connection.
7.3.5 Detection and Elimination
After the field screening is complete, the City will take measures to identify and
remove illegal discharges. Identifying illegal discharges may require a combination
of office and field work. After the site visit and field observation, staff will consult
the jurisdiction -wide information they have compiled to obtain information about
the land uses, infrastructure, industries, potential sources and types of pollution
that may exist in the drainage area of the outfall.
After priority areas have been identified in the office, a systematic field
investigation will be planned that minimizes the amount of resources required to
identify the source. The following field methods may be used to identify and trace
the source of illegal discharges:
• Site Investigation
• Dry weather flow observations
• Smoke Testing/Dye Testing
• Television Inspection
The right of entry established in the ordinance will provide access for inspection if
the origin of the discharge is in doubt. Once an illegal discharge is located and
confirmed through field screening, staff will notify the responsible party verbally if
possible and follow-up with written notification. If the responsible party does not
comply with the removal schedule provided by the City, or receive approval for a
revised schedule, the City will take enforcement action and the discharge or
connection will be removed at the responsible party's expense.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.3.6 Non Stormwater Discharges
Currently there are no known non-stormwater discharges that are a significant
contributor to the MS4. If any are identified in the future, they will be addressed at
that time.
7.3.7 Outreach
City employees will be informed of the hazards associated with illegal discharges
and improper disposal of waste as part of their general training requirements.
These will be addressed in the Pollution Prevention/Good Housekeeping section
of this plan, and will include training in hazardous material handling and disposal,
as well as notices and signs posted in the appropriate areas.
The general public will be educated through the BMP's listed in the Public
Education section of this plan. These educational BMP's will include brochures,
public service announcements, and business education and outreach programs.
7.3.8 Decision Process
The formation of the storm water Illicit Discharge Detection and Elimination
program was based primarily on regulatory mechanisms. The regulatory,
educational, procedural BMP's selected were judged to be an effective means of
detecting and eliminating illicit discharges.
7.3.9 Evaluation
The effectiveness of the program will be gauged by the total number of illicit
connections detected and removed each year and with public complaints. If the
total number remains constant, or increases, changes will be made to the public
education program and/or the City ordinance to allow for greater enforcement and
penalties.
7.4 CONSTRUCTION SITE STORMWATER RUNOFF CONTROL
The City of Lexington will rely on the North Carolina State Erosion and Sediment
Control Program and the Department of Water Resource's general stormwater
permit program for construction activities to meet the construction site
stormwater runoff control requirement.
Page 20

COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.5 POST -CONSTRUCTION STORM WATER MANAGEMENT IN NEW DEVELOPMENT AND REDEVELOPMENT
.5.1 BMP Summary Table
BMP
Measurable Goals
YIR
Y2R
Y3R
4R
Responsible Position/Panty
5R
Review Adequate Legal Authority
Review the Post Construction Ordinance for
X
X
City Attorney
compliance with NC DEQ guidance and local
Public Services Manager
effectiveness.
Civil Engineer
Review standards and policies that ensure
Review local standards to remain in compliance
X
X
X
X
X
Public Services Manager
structural BMPs will be in conformance with
with the NC DEQ-WR- BMP Manual. Additional
Civil Engineer
the state's Stormwater Management
measures and techniques may be added to the
Design Manual
local ordinance as they are investigated.
Plan Reviews
Review plans that qualify within the City's Post
X
X
X
X
Civil Engineer
Construction Ordinance within the City's TRC
Consultant Engineer
format.
Review maintenance standards and
Review the maintenance standards and
X
X
Public Services Manager
inspection program to ensure that on -site
inspection program for local on -site controls.
Civil Engineer
controls continue to function as designed.
Develop an education program created for
Develop an education program created for land
X
X
Public Services Manager
land developers and the public.
developers and the public detailed in other
Civil Engineer / Stormwater Smart
BMPs.
Provide/Maintain Inventory of post
Maintain a list of stormwater control measures, a
X
X
X
X
Civil Engineer
construction stormwater control measures
map of stormwater control measures, and a file of
stormwater reviews and approvals
Inspections of stormwater control measures
Maintain a list of inspection reports on approved
X
X
X
X
Public Services Manager
and built stormwater control measures.
Civil Engineer
Green Infrastructure Practices and
Green Infrastructure Practices and Strategies will
X
X
X
Public Services Manager
Strategies will be encouraged.
be encouraged and existing standards may be
City Planner
eased to encourage green projects.
Enforcement
Notices of violations and enforcement actions will
X
X
X
City Attorney
be tracked. To give the ability to identify chronic
Public Services Manager
violators to initiate actions to reduce
noncompliance.
Civil Engineer
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.5.2 Stormwater Management Options
The existing land usage ordinance has a post -construction stormwater runoff
management program for new development and redevelopment projects that
disturb greater than, or equal to, one acre.
7.5.3 Non -Structural BMP's
The receiving streams in the City's watershed are classified as Nutrient Sensitive
Waters; therefore the post construction ordinance ensures that best management
practices for reducing nutrient loading are implemented.
7.5.4 Structural BMPs
The City has certified its BMP manual as equal to the NC DWQ BMP Manual. The
City reviews structural BMP's based on the NC DWQ BMP Manual and will
continue to do so in the future. The City may investigate additional qualified BMP's
in the future. These additional techniques are to be evaluated based upon field
testing and evaluation by the city's engineer.
7.5.5 Regulatory Mechanism
The City's Post -Construction Ordinance establishes the City's authority to regulate
new development for water quality compliance.
7.5.6 Operation and Maintenance
The City's Post -Construction Ordinance establishes the City's authority to regulate
new development for water quality compliance. The ordinance includes guidelines
for delegating routine and non -routine maintenance responsibilities to ensure
access for inspections, and providing a mechanism for enforcement.
The City will require annual submissions of BMP inspection reports and the City
will inspect each BMP during each permit cycle.
7.5.7 Education
An education process for developers and citizens about new development with
respect to stormwater and water quality has been established and is ongoing.
7.5.8 Decision Process
The post -construction stormwater management program ensures that controls are
in place that will prevent or minimize water quality impacts from new development
and redevelopment projects. These controls include post -construction ordinance
to address post -construction runoff control from new development and
redevelopment projects and ensure adequate long-term operation and
maintenance of BMPs. Future revisions to this ordinance will be intended to
enhance water quality.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.5.9 Evaluation
The post -construction site management for new and re -development activities
program will be evaluated based on how each individual BMP is meeting its
measurable goal at the end of each reporting period. Changes will be considered
for any BMPs that are not meeting the measurable goals.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.6 POLLUTION PREVENTION/GOOD HOUSEKEEPING FOR MUNICIPAL OPERATIONS
.6.1 BMP Summary Table
BMP
Measurable Goals
YIR
Y2R
Y3R
4R
5R
Responsible Position/Party
Complete environmental audit of all
Begin environmental audits at priority sites and
X
X
X
Public Services Manager
identified municipal facilities and
complete all audits by Year two. Prioritize
Civil Engineer
prioritize recommendations for
recommendations, as each audit is completed and
addressing potential pollution
initiate recommendations in the fiscal year following
prevention activities. Annually inspect
recommendations. High hazards will be addressed
all municipal facilities to identify
immediately. Objective is to reduce pollutant loading
potential for polluting stormwater.
from municipal sites.
Map Municipally owned or operated
Identify and Map Municipally —owned or operated
X
X
X
Public Services Manager
facilities.
facilities. The map will identify the stormwater outfalls
Civil Engineer
and receiving waters of each facility to which these
facilities discharge. Maintain updated map.
Spill Response Procedures
Maintain a Spill Response Procedure
X
X
X
X
Public Ser. Mgr./ Civil Engineer
Streets, Roads, and Public Parking
Evaluate and select BMP's by end of year 2,
X
X
Public Services Manager
Lots Maintenance Program
implement BMP's by end of year 3. Evaluate Annually
Civil Engineer
for cost and effectiveness.
O&M for municipally owned or
Implementation of the O&M Program for the MS4,
X
X
X
Public Services Manager
maintained catch basins and
including catch basins and conveyance systems.
Civil Engineer
conveyance systems
Reassess program annually.
O&M & list for municipally -owned or
Implement and maintain an O&M Program for
X
X
X
Public Services Manager
maintained structural stormwater
municipally -owned or maintained structural stormwater
Civil Engineer
controls
controls. Municipally owned SCM's are listed along
with other structural SCM's.
Pesticide, Herbicide and Fertilizer
Ensure municipal employees and contractors are
X
X
X
X
X
Public Services Manager
Application Management
properly trained and all permits, certifications, and
Civil Engineer
other measures for applicators are followed.
Staff Training
Implement an employee training program for
X
X
X
X
Public Services Manager
employees involved in pollution prevention and good
Civil Engineer
housekeeping practices.
Vehicle Washing
Implement measures to minimize or prevent
X
X
X
Public Services Manager
contamination of stormwater runoff from all areas used
Civil Engineer
for vehicle and equipment cleaning.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.6.2 Affected Operations
The City of Lexington has Streets, Recycling & Waste, Fleet, Recreation/Public Grounds, Golf, Public Buildings,
Warehouse, Gas, Electric, Public Works M & C, Waste Treatment Plant, Water Treatment Plant, Police and Fire
Department buildings.
7.6.3 Training
Training materials have been developed on pollution prevention for public facilities, using similar materials as will be used
in the public outreach program. All employees are educated on the need for controls to protect stormwater from exposure
to potential pollutants. This training also serves as the training requirement for public employees as specified in the outreach
component of the Illicit Discharge section of this program.
All public employees involved in vehicle, open space, or building maintenance operations will be provided training in BMPs,
the processes and materials they are working with, safety hazards, practices for preventing discharges, and procedures
for responding quickly and properly to toxic and hazardous material incidents.
All public employees involved in stormwater drainage system maintenance will be specifically trained in the disposal of
floatables, grit, sediment, and other pollutants removed from the system. Additional training will be provided to employees
that manage and apply chemicals for control of dust, pests, vermin and weeds and or to enhance the growth or condition
of public urban and recreational landscape and recreational facilities. Training will target the safe and effective application,
storage and disposal of the chemicals used.
7.6.4 Maintenance and Inspections
A preventive maintenance program will be developed that includes routine inspections of catch basins and other stormwater
systems for the municipal building and vehicle storage yard. The objective of the inspections is to reduce pollutant loading
from municipal sites. Inspections include noting any problems or issues that may have an impact on stormwater quality,
and any corrective actions needed. Schedules, procedures, and a record -keeping system are used to schedule and
document inspections.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.6.5 Vehicular Operations
All vehicles, equipment, and associated material at all Department will need to be maintained. Washing of vehicles will be
performed in a designated wash areas where runoff can be properly managed to prevent stormwater pollution. Minor
vehicle and equipment maintenance take place at these facilities.
7.6.6 Waste Disposal
Debris and floatables collected from the MS4 are currently transferred to multiple sites. Disposal of the material will be
investigated in year two and addressed within the five year permit cycle. The City of Lexington performs its own garbage,
yard waste, recyclables and heavy trash collection. Used oil from vehicle and equipment maintenance operations is stored
onsite and periodically collected by a certified oil recycler.
7.6.7 Flood Management Projects
Future flood management projects will be reviewed from a water quality standpoint.
7.6.8 Decision Process
The most effective and practical BMPs for minimizing stormwater pollution were selected for this program.
7.6.9 Evaluation
The pollution prevention/good housekeeping for municipal operations program will be evaluated based on how each
individual BMP is meeting its measurable goal at the end of each reporting period. Changes will be considered for any
BMPs that are not meeting the measurable goals.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.7 TOTAL MAXIMUM DAILY LOADS (TMDL)
.7.1 BMP Summary Table
BMP
Measurable Goals
YIR
Y2R
Y3R
4R
5R
Responsible Position/Party
Establish if a TMDL exists on a
Verify TMDL's annually.
X
X
X
X
Public Services Manager
receiving water of the MS4
Civil Engineer
Water Quality Recovery Program
If a TMDL is determined to exist, evaluate TMDL and
X
X
X
X
Public Services Manager
establish Water Quality Recovery Program in
Civil Engineer
accordance with the permit.
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COMPREHENSIVE STORMWATER MANAGEMENT PROGRAM REPORT
CITY OF LEXINGTON
7.7.2 Determination of TMDL's
A TMDL on a receiving water with a stormwater Waste Load Allocation (WLA)
will trigger the need for compliance with this section of the CSWMP. A TMDL with
no WLA will not require a Water Quality Recovery Plan, but rather the need to
evaluate existing strategies and if any can be tailored or expanded to improve the
water quality in the TMDL watershed.
7.7.3 Establishing a Water Quality Recovery Plan
Based on the above schedule the City of Lexington would begin creating a Water
Quality Recovery Plan (WARP) within 12 months of establishment of the TMDL,
would have evaluated existing measures within 24 months, developed a
monitoring plan within 36 months, and would be implementing or have planned for
implementation within 48 months. The WQRP would be submitted and approved
by NC DEQ and EPA.
7.7.4 Decision Process
TMDL planning and implementation will be done in an effort to improve water
quality and with the approval of NC DEQ staff.
7.7.5 Evaluation
Progress toward restoring water quality standards will be difficult to determine and
most evaluation tools will be based upon programs rather than through water
quality monitoring or water quality improvements. While the goal of a WARP is to
improve water quality standards, the NPDES MS4 permit obligation is to reduce
non -point source pollutant loading to the maximum extent practicable (MEP). The
MS4 is not required to meet water quality standards. Evaluation of successful
techniques will be evaluated over time, probably multiple permit cycles.
Page 28