NCS000449_MS4 O&M Plan_20220718

Operation and
Maintenance Plan
MS4 Permit Compliance
Town of Cramerton
Cramerton, North Carolina
July 12, 2022

This page intentionally left blank.

Town of Cramerton I Operations and Maintenance Plan ���
Contents
Contents
Contents ............
1 Introduction......................................................................................................................... 1
1.1 Background and Purpose............................................................................................. 1
2 Permit Requirement Elements............................................................................................ 2
3 Collection System Inspection and Maintenance.................................................................. 2
3.1 Catch Basin Cleaning Program.................................................................................... 2
3.1.1 Routine Inspection and Cleaning.......................................................................... 2
3.1.2 Catch Basin Prioritization...................................................................................... 2
3.1.3 Priority Ranking and Future inspection.................................................................. 3
3.1.4 Catch Basin Cleaning Material Storage and Reuse ............................................... 3
3.1.5 Reporting Metrics.................................................................................................. 3
3.2 Conveyance Maintenance Program............................................................................. 4
3.2.1 Open Drainage System......................................................................................... 4
3.2.2 Closed Drainage Systems..................................................................................... 4
3.3 General Standards for Required Maintenance............................................................. 4
3.4 Reactive Based Maintenance...................................................................................... 5
4 Street Sweeping.................................................................................................................. 5
4.1.1 Reporting Metrics.................................................................................................. 6
5 Training...............................................................................................................................6
6 Reporting and Recordkeeping............................................................................................. 6
7 Program Evaluation and Plan Updates............................................................................... 7
Appendices
Appendix A — Catch Basin Inspection Form & Cleaning Log
Appendix B — Street Sweeping Log
Appendix C — Employee Training Log

Town of Cramerton I Operations and Maintenance Plan ���
Introduction
1 Introduction
1.1 Background and Purpose
The Town of Cramerton has developed this MS4 Operation & Maintenance (O&M) Plan as part
of compliance with the United States Environmental Protection Agency's (EPA's) Phase II
National Pollutant Discharge Elimination System (NPDES) program for Municipal Separate
Storm Sewer Systems (MS4) in North Carolina. The EPA has delegated administration of the
NPDES program in the state of North Carolina to the North Carolina Department of
Environmental Quality (NCDEQ). The Town of Cramerton under Individual Permit No.
NCS000449 discharges stormwater runoff from their MS4. The NPDES program requires
regulated operators of MS4s to obtain a permit to discharge stormwater runoff from their MS4
and establishes conditions they must meet to reduce the impacts of stormwater discharges.
One of these conditions requires regulated communities to develop an MS4 O&M Plan to
minimize pollutants in the stormwater drainage system. This Plan describes the Town of
Cramerton's measures and procedure to meet the permit requirement. The Town of
Cramerton's MS4 is made up of the structures and facilities used for collecting, conveying,
storing and/or treating stormwater from the source drainage area to outfalls at receiving waters.
To ensure the stormwater system continues to operate as designed to safely convey stormwater
volume, velocity, and quality, it is the Town's responsibility to maintain the MS4. This MS4 O&M
Plan is essential to helping the Town maintain the functionality of the system and meet the
permit requirement.
The Town currently performs as needed inspections and maintenance activities on the
stormwater drainage system. The Town is building on this process by developing this MS4 O&M
Plan to perform routine inspections, cleaning, and maintenance of the MS4. This O&M Plan
addresses permit requirement (Part 3.7.3), by describing the activities and procedures the Town
will implement so that the stormwater drainage system is maintained in a timely manner to
reduce the discharge of pollutants from the MS4. This plan discusses the Town's activities and
outlines the Town's procedures for system inspection, maintenance, and documentation
procedures for catch basins, municipally -owned streets, and parking lots. A map of the existing
stormwater infrastructure can be found on the Town's GIS website
(https://cramerton.maps.arcgis.com/apps/mapviewer/index.html?webmap=12b4e7ec96Of4a449
4cfefed68aada59).
The operation and maintenance program outlined here is designed to achieve the following
goals:
• Assist the Town with meeting local SWMP goals and NPDES Phase II MS4 regulatory
compliance;
• Reduce citizen complaints;
• Improve the conveyance efficiency of the drainage system;
• Support future capital replacement and maintenance program including associated
budgeting effort; and
0 Extend the life cycle of the drainage system infrastructure.

Town of Cramerton I Operations and Maintenance Plan
Permit Requirement Elements a
2 Permit Requirement Elements
The Permit details the requirements of an operation and maintenance program for a MS4 and
includes the elements listed in Section 3.7.3, Measures to minimize pollutants in the stormwater
collection system.
"The permittee shall provide operation and maintenance staff training on stormwater
awareness and pollution prevention, perform MS4 inspections, maintain the collection
system including catch basins and conveyances; and establish specific frequencies,
schedules, and standard documentation".
The following sections present the Town of Cramerton's MS4 O&M plan associated with
meeting these requirements.
3 Collection System Inspection and Maintenance
3.1 Gatch Basin Cleaning Program
The Town currently performs random wet weather inspections of the stormwater drainage
system including catch basins during and immediately after rainfall events to ensure the system
is draining. The Town is building on this process with the catch basin cleaning program to
outline steps to perform routine inspections, cleaning, and maintenance of the catch basins that
are located within the MS4 regulated area. The Town will implement the following catch basin
inspection and cleaning procedures to reduce the discharge of pollutants from the MS4.
3.1.1 Routine Inspection and Cleaning
Catch basins should be cleaned on a rotating basis such that they are no more than 50 percent
full at any time. The Town will initially perform visual inspection of all catch basins at least once
within the regulated area per permit cycle to evaluate sediment or debris accumulation and
establish optimal inspection and maintenance frequencies to meet the "50 percent" goal. The
Town will inspect visually the ends of closed drainage system annually, keeping track of the
inspected systems in the GIS map database. This will allow the Town to at least screen all
systems once per permit cycle. A catch basin inspection/cleaning procedure, inspection form,
and log of catch basins cleaned or inspected are included in Appendix A.
3.1.2 Catch Basin Prioritization
The Town will prioritize catch basin cleaning according to the following:
• The Town will prioritize catch basin cleaning activities in watershed areas listed as
impaired due to suspended solids or nutrients. If a catch basin is more than 50 percent
full during two consecutive routine inspections and or cleaning events, the finding will be
documented, the contributing drainage area will be investigated for sources of excessive
sediment loading, and to the extent practicable, contributing sources will be addressed.
If no contributing sources are found, the inspection and cleaning frequency will be
increased.
• Catch basins located near construction activities (e.g., roadway construction, residential,
commercial, or industrial development or redevelopment) will also be inspected and

Town of Cramerton I Operations and Maintenance Plan ���
Collection System Inspection and Maintenance
cleaned more frequently if inspection and maintenance activities indicate excessive
sediment or debris loadings (i.e., catch basins more than 50 percent full).
3.1.3 Priority Ranking and Future inspection
The Town will utilize the following priority rankings to inform future inspection.
Priority A — Catch basins that are designated as consistently generating the highest
volumes of trash, sediment and/or debris. These catch basins are typically located near
construction activities and frequently travelled streets. Areas where tree canopy is
significant can also consistently generate high volumes of trash. Any catch basins that
are more than 50 percent full during two consecutive inspections and cleanings should
receive Priority A designation.
• Priority B — Catch basins that are designated as consistently generating moderate
volumes of trash, sediment and/or debris. These catch basins will consistently show
sediment loads in the catch basin sump pumps but the depths of sediment may not
reach 50 percent of the sump depth.
• Priority C — Catch basins that are designated as generating low volumes of trash,
sediment and/or debris. These catch basins may not include any sediment on a
consistent basis.
The future inspection/cleaning schedule assignments would be as follows:
BMP
Activity
Frequency
Priority A — Inspect at least once per year. Clean
when sediment reaches 50% of sump depth.
Priority B — Inspect minimum of one time per permit
Catch Basin
Inspection /
cycle. Clean when sediment reaches 50% of sump
Maintenance
Cleaning)
depth.
Priority C — Inspect minimum of one time per permit
cycle
3.1.4 Catch Basin Cleaning Material Storage and Reuse
The materials removed from catch basin cleaning shall not re-enter the stormwater drainage
system. Litter, non -hazardous sediments, and other pollutants are to be disposed of at an
approved waste facility. In cases where an inspection reveals sediments with abnormal, non -
natural discoloration or detects strong petroleum and/or chemical odors, the staff performing the
catch basin cleanings should notify the Town's Fire Department for investigation and potential
proper handling of hazardous materials.
3.1.5 Reporting Metrics
The following information will be included in each annual report:
0 Any action taken in response to excessive sediment or debris loadings

Town of Cramerton I Operations and Maintenance Plan ���
Collection System Inspection and Maintenance
• Total number of catch basins
• Number of catch basins inspected
• Number of catch basins cleaned
• Total volume or mass of material removed from catch basins
3.2 Conveyance Maintenance Program
The Town currently performs random wet weather inspections of the stormwater collection
system including pipes and channels during and immediately after rainfall events to ensure the
system is draining. The Town's Public Works department removes leaves and debris in streets
and picks up yard waste and bulky items on an as -needed basis. The Town also maintains
vegetation in the right-of-way and performs street sweeping more frequently in areas where tree
canopy is significant as a preventative maintenance. The Town is building on these existing
processes with the stormwater channels, gutters, and natural conveyance maintenance
program to outline steps to perform routine inspections, cleaning, and maintenance of the
conveyance system. The Town will implement the following inspection and cleaning procedures
to reduce the discharge of pollutants from the MS4.
3.2.1 Open Drainage System
The Town will maintain the open drainage system through the following procedures:
• Town staff will inspect the entire length of the ditch/swale identified within the public
right-of-way or as otherwise identified as the responsibility of the Town at least once per
permit cycle.
• Town staff will routinely maintain all open drainage structures identified as being part of
the Town's maintenance responsibilities through the following procedures:
o Town staff will remove all manmade and natural objects that are causing or could
potentially cause a blockage to the system.
o Town staff will manually remove excess emergent vegetation. Bank side
vegetation and vegetation in the maintenance right-of-way will be mowed or
trimmed, but not removed to protect against erosion. Town staff will remove all
litter prior to mowing/trimming of vegetation.
o If the ditch is not draining properly, Town staff can perform maintenance
operation to re-establish proper drainage.
3.2.2 Closed Drainage Systems
The Town will inspect all closed drainage system annually, keeping track of the inspected
systems in the GIS map database. This will allow the Town to at least screen all systems once
per permit cycle. The ends of the pipe systems will be inspected along with the catch basins as
routine inspection are performed. The Town staff will assess the system for condition, material,
water quality issues, and structural issues. Maintenance activities will be conducted as needed
based on the results of the inspection.
3.3 General Standards for Required Maintenance
The Town will utilize the following guidelines for general maintenance of the storm drainage
system.

Town of Cramerton I Operations and Maintenance Plan ���
Street Sweeping
• Ditches — Drainage ditches shall be inspected and cleaned if accumulated sediment,
debris or other deposits exceed 25% of the functional depth. Vegetation will not be
removed intentionally or unintentionally through over -culling. Right-of-way litter shall be
removed and properly disposed, and turf will be mowed regularly during the growing
season.
• Storm Drains — Storm drains will be inspected as the catch basins are inspected. Storm
drains shall be cleaned if accumulated sediment, debris, or other deposits are blocking
more than 25% of the pipe diameter.
o If pipe flushing is required to maintain storm drains, polluted water and debris
from pipe flushing will be captured and properly disposed.
• Culverts — Woody debris and other blockages will be immediately removed from culverts
and other critical conveyance components.
• Outfalls — Outfalls shall be inspected in accordance with the Town's IDDE manual and
maintained to be free of debris, sediment and other blockages. If flows in the outfall
observed during inspections indicate a potential pollution problem, immediate reporting
and investigation will be conducted per Town's IDDE manual. Energy dissipaters shall
be installed if discharge from an outfall is causing erosion.
3.4 Reactive Based Maintenance
The Town provides means for the public to make stormwater related complaints. Complaint
response or "remedial" maintenance is performed based on evidence of system impact or non-
functioning condition identified through citizen complaints. Upon receipt of a complaint, the
Town adds it to the complaint log and generates a work order for the individual project. The
Planning Director or their designee will also perform an inspection of drainage complaints within
a month. The inspector will assess the system for condition, material, water quality issues,
structural issues, etc., and make recommendations for resolution. Also, Public Works staff
routinely drive around the Town's right-of-way weekly to generate work orders for the week.
These work orders can consist of recommended maintenance that can include sediment/litter
removal, vegetation clearing, channel stabilization, and outlet structure repairs. The recommend
maintenance are scheduled and performed on an as -needed basis and are logged as they are
performed through the Town's work order system.
When maintenance is recommended, it will be recorded in a work order database, and
performed based on the Town's maintenance standards. If recommended remedial
maintenance calls for more specialized expertise and equipment, then the work order may be
transferred to another department or an outside entity specializing in that activity. A database of
complaints received, and actions taken is maintained by the Planning Director. These issues are
logged electronically and forwarded to the proper department for investigation and resolution.
4 Street Sweeping
The Town currently performs non -routine street sweeping and right of way trash pick-up to
maintain the Town's right -of way and municipally owned parking lots. The Town also maintains

Town of Cramerton I Operations and Maintenance Plan ���
Training
vegetation in the right-of-way and performs street sweeping more frequently in areas where tree
canopy is significant as a preventative maintenance. The Town removes sediment build-up and
performs leaf vacuuming on an as needed basis. The Town is building on these existing
processes with expanded street sweeping operations. The street sweeping operations will help
the Town in maintaining the MS4 system by keeping the streets and gutters clear of debris that
could potentially travel into the catch basins. This operation also aids in preventing clogging of
the MS4 system and helps remove other pollutants before traveling down the MS4 system. The
Town will implement the following street and parking lot sweeping procedures to reduce the
discharge of pollutants from the MS4:
• All streets, with the exception of rural uncurbed roads with no catch basins or high-speed
limited access highways, will be swept and/or cleaned a minimum of once per year
preferably in the spring (following winter activities).
• More frequent sweeping will be considered for targeted areas based on debris and
sediment build-up, visual inspections, catch basin cleaning or inspection results,
proximity to constructions sites, land use, impaired waters, or other factors.
• For rural uncurbed roadways with no catch basins and limited access highways, the
Town will either meet the minimum frequencies above, or develop and implement an
inspection, documentation, and targeted sweeping plan.
4.1.1 Reporting Metrics
The following information will be included in each annual report:
• Any action taken in response to excessive sediment or debris loadings
• Total lane mileage for scheduled cleaning
• Lane mileage of streets cleaned
• Total volume or mass of material removed from street sweepers (see Street Sweeping
Log in Appendix B)
5 Training
The Planning Director is responsible for arranging MS4 O&M training for Town staff. The
training will focus on general awareness for all Town staff and Town policy and procedures
related to O&M Plan, reporting, and evaluation of the program for Public Works staff. Public
Works staff will be trained in field observation techniques to recognize issues during routine field
inspection. Maintenance procedure described in this MS4 O&M Plan will also be demonstrated
during the training, and the training will include specifics of how to utilize the plan. The Town will
conduct this training annually for all Town staff. The Planning Director will record the employees
present at the training in the Employee Training Log (Appendix C).
6 Reporting and Recordkeeping
The tracking and documentation of MS4 maintenance and operations is a required part of the
permit. Inspection form templates are included to record observations and corrective actions
taken in this plan. The completed inspection forms should be kept on file for the permit cycle
and the information used to update the MS4 O&M Plan as necessary. For example, if a

Town of Cramerton I Operations and Maintenance Plan ���
Program Evaluation and Plan Updates
particular catch basin is scheduled for annual inspection / cleaning and is consistently found to
contain accumulated sediments greater than 50% full, the inspection frequency should be
revised accordingly. Information obtained from prior maintenance activities, inspection reports,
citizen complaints as well as reports provided by other Town departments, will be used to
determine the appropriate priority level. All inspection forms will be recorded and stored with the
Planning Director, to ensure that the proper documentation is maintained and reported on the
annual reports and that the relevant data is added to the Town's documentation.
7 Program Evaluation and Plan Updates
Regular review of the MS4 O&M plan and the procedures is important in order for the Town to
have an up to date standard to use for assessing the overall effectiveness of the operation and
maintenance program for compliance with Town's Individual Permit No. NCS000449. The Town
will annually evaluate the program. Evaluation procedures will include documentation of actions
taken to inspect and maintain the MS4. Evaluation documentation will include the following:
• Any action taken in response to excessive sediment or debris loadings
• Total number of catch basins
• Number of catch basins inspected
• Number of catch basins cleaned
• Total volume or mass of material removed from catch basins
• Total lane mileage for scheduled cleaning
• Lane mileage of streets cleaned
• Total volume or mass of material removed from street sweepers
• Town staff trained

Town of Cramerton I Operations and Maintenance Plan ���
Program Evaluation and Plan Updates
This page intentionally left blank.

Town of Cramerton I Operations and Maintenance Plan
Appendix A — Catch Basin Inspection Form & Cleaning Log
Appendix A — Catch Basin
Inspection Form & Cleaning
Log

Town of Cramerton I Operations and Maintenance Plan �1
Appendix A — Catch Basin Inspection Form & Cleaning Log J
This page intentionally left blank.

Town of Cramerton I Operations and Maintenance Plan ���
Appendix A — Catch Basin Inspection Form & Cleaning Log
Catch Basin Inspection Form
Inspector: Date:
Catch Basin I.D.
Final Discharge from Structure? Yes ❑
No ❑
If Yes, Discharge to Outfall No:
Catch Basin Label:
Stencil ❑
Ground Inset ❑ Sign ❑ None ❑ Other
Concrete
Corrugated metal
❑
Good ❑
Poor ❑
Basin Material:
Stone
El
Catch Basin Condition:
Fair ❑
Crumbling ❑
Brick
❑
Other:
I-1
Concrete
❑
HDPE PVC
❑
Pipe Material:
Clay Tile
❑
Pipe Measurements:
Diameter (in):
D=
Other:
❑
Required Maintenance/ Problems (check all that apply):
❑ Tree Work Required
❑ Cannot Remove
❑ New Grate is Required
Cover Ditch Work
❑ Pipe is Blocked
HCorrosion at Structure
❑ Frame Maintenance is Required
❑ Erosion Around Structure
❑ Remove Accumulated Sediment
❑ Remove Trash & Debris
❑ Pipe Maintenance is Required
❑ Need Cement Around Grate
❑ Basin Undermined or Bypassed
Other:
Catch Basin Grate Type:
Sediment Buildup
More than
Description
Street Name/
Depth:
50% full?
of Flow:
Structure
Bar: ❑
Location:
Cascade: ❑
0-6 (in):
Yes ❑
Heavy ❑
Other:
6-12(in):
Moderate ❑
12-18 (in):
No ❑
Slight ❑
Properly Aligned: Yes
18-24 (in):
Trickling ❑
No ❑
24 + (in):
El
*If the outlet is submerged check yes and indicate
approximate height of water
Yes ❑
No ❑
above the outlet invert. h above invert (in):
❑ Flow
Observations:
Circle those present:
❑ Standing Water
Color:
Foam
Oil Sheen
Odor:
(check one or both)
Waste Orange
Bacterial
Sheen
Weather Conditions :
Dry > 24 hours El Wet ElSanitary
Sample of Screenings Collected for Analysis? Yes ❑ No ❑
Amount of sediment removed:
Staining
Floatables
Comments:
Excessive
Pet Waste
sediment
Optical
Other:
Enhancers

Town of Cramerton i Operations and Maintenance Plan
Appendix A — Catch Basin Inspection Form & Cleaning Log
Catch Basin Inspection & Cleaning Log
Date Inspector Weather Number of Catch Amount of Material Catch Basins More Corrective Action
Conditions Basins Removed Than 50% Full Taken/Recommended if More
Inspected/Cleaned Than 50% Full

Town of Cramerton I Operations and Maintenance Plan ���
Appendix B — Street Sweeping Log
Appendix B — Street
Sweeping Log

Town of Cramerton I Operations and Maintenance Plan ���
Appendix B — Street Sweeping Log
This page intentionally left blank.

Town of Cramerton I Operations and Maintenance Plan �1J�
Appendix B — Street Sweeping Log
Street Sweeping Log
Date
Operator
Weather
Conditions
Streets/Parking
Lots Swept
Number of Miles Swept
Volume/Mass of
Material Removed
Corrective Action
Taken/Recommended

Town of Cramerton I Operations and Maintenance Plan �1J�
Appendix B — Street Sweeping Log
Date
Operator
Weather
Conditions
Streets/Parking
Lots Swept
Number of Miles Swept
Volume/Mass of
Material Removed
Corrective Action
Taken/Recommended

Town of Cramerton I Operations and Maintenance Plan ���
Appendix C — Employee Training Log
Appendix C — Employee
Training Log

Town of Cramerton I Operations and Maintenance Plan ���
Appendix C — Employee Training Log
This page intentionally left blank.

Town of Cramerton I Operations and Maintenance Plan �1J�
Appendix C — Employee Training Log
IDDE Employee Training Record
Name Role Training Date Signature

Town of Cramerton I Operations and Maintenance Plan �1J�
Appendix C — Employee Training Log
Name Role Training Date Signature

FN
440 S Church Street, Suite 1200
Charlotte, NC 28202-2075
704.338.6700
NCBELS License F0116
hdrinc.com
© 2022 HDR, Inc., all rights reserved