01_NCS000427_SWMP_20230502

Stormwater Management Program Narrative
TABLE OF CONTENTS
1. STORM DRAIN SYSTEM INFORMATION
1.1. Population Served
1.2. Growth Rate
1.3. Jurisdictional and MS4 Service Areas
1.4. MS4 Conveyance System
1.5. Land Use Composition Estimates
1.6. Estimate Methodology
1.7. TMDL Identification
2. RECEIVING STREAMS
3. EXISTING WATER QUALITY PROGRAMS
3.1. Local Programs
3.2. State programs
4. PERMITTING INFORMATION
4.1. Responsible Party Contact List
4.2. Organizational Chart
4.3. Signing Official
4.4. Duly Authorized Representative
5. CO-PERMITTING INFORMATION (IF APPLICABLE)
5.1. Co-Permittees
5.2. Legal Agreements
5.3. Responsible Parties
6. RELIANCE ON OTHER GOVERNMENT ENTITY
6.1. Name of Entity
6.2. Measure Implemented
6.3. Contact Information
6.4. Legal Agreements
7. STORMWATER MANAGEMENT PROGRAM
7.1. Public Education And Outreach On Storm Water Impacts
7.2. Public Involvement And Participation
7.3. Illicit Discharge Detection And Elimination
7.4. Construction Site Stormwater Runoff Control
7.5. Post-Construction Storm Water Management In New Development And
Redevelopment
7.6. Pollution Prevention/Good Housekeeping For Municipal Operations
APPENDICES
A. Receiving Streams
B. BMPs and Measurable Goals
C. Stormwater Ordinances

1. Storm drain System Information
1.1. Population Served: The permanent population is approximately 166,268 per the Town
of Cary Planning Department. (Estimated Population 2019)
1.2. Growth Rate: The population growth rate for the service area calculated based on the
simple analysis of the relative change between the population in 2012 and 2016 stated
as a percent change, annualized by dividing the percent change by 5 yields a growth
rate of 2.4%. 2012 population was estimated at 141,132; 2016 population was
estimated at 155,918 and 166,268 2019.
1.3. Jurisdictional and MS4 Service Areas: The jurisdictional area is approximately 58
square miles. The service area is approximately 60.66 square miles within the Town
of Cary city limits and within the Extra Territorial Jurisdiction. There are approximately
594 miles of storm drain line per our GIS system.
1.4. MS4 Conveyance System: Stormwater is transmitted through a system of closed pipes
and open ditches to a network of natural streams and manmade lakes. High density
areas have curb and gutter with closed pipes that empty to streams or Stormwater
control measures via flared end section pipes. There are few direct pipes to streams.
Low density development is served by either curb & gutter or swales and yard inlets
which then carry stormwater via closed pipes to natural streams.
The maintenance of this stormwater infrastructure is divided into public and private
responsibilities. The publicly maintained system is along the road Right of Way(R/W).
The Town is responsible for keeping the catch basins along public roads and culverts
which carry streams under roads clear of debris so that runoff can flow freely.
Infrastructure on private property (generally further than 10 feet from the road) should
be maintained by the property owner. Drainage swales and stormwater outfalls should
be regularly maintained to remove any accumulated debris. Streams should also be
maintained by the homeowner, but in accordance with local, state, and federal rules.
Maintenance is performed by the Town's Department of Public Works on an as-needed
basis as problems are found usually due to flooding reports and/or citizen complaints.
The Town's Department of Water Resources is currently working on a condition
assessment program for the Town's stormwater infrastructure.
1.5. Land Use Composition Estimates:
LAND USE ACRES PERCENT
Residential 29048 63
Commercial 7128 15
Industrial 2652 6
Open Space 7363 16
1.6. Estimate Methodology: The land use figures are based on existing land use within the
Town's planning limits per our GIS system. Residential includes very low, low, medium
and high density residential land uses. Commercial includes office/institutional,
commercial and mixed uses. Industrial includes office/industrial and utilities, and open
space includes vacant properties, agriculture/forest, parks, and lake areas.
1.7. TMDL Identification:
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 1

Jordan Lake—Jordan Lake Rules are in effect. The Town of Cary is currently in Stage
1 phase for reductions from existing development. The buffer rule is currently under
review by the Town.
Swift Creek— TMDL was finalized and a Water Quality Recovery Plan was approved
by NCDEQ-DWR.
2. Receiving Streams
Seventy-five percent of the area drains to the Neuse River. The remaining twenty-five
percent enters the Cape Fear River through Jordan Lake. The most significant receiving
streams are listed in Table 1.
Table 1. Receiving Stream Overview
Water Quality
Receiving Stream Name River Basin Classification Water Quality Issues
Crabtree Creek Neuse C-NSW Urban stream
Walnut Creek Neuse C-NSW Urban stream
Swift Creek Neuse WS-III Biological impairment
Middle Creek Neuse C-NSW Urban steam
Panther Creek Cape Fear WS-Iv Jordan Lake Rules
White Oak Creek Cape Fear WS-Iv Jordan Lake Rules
See Appendix A for an expanded list of receiving streams.
3. Existing Water Quality Programs
3.1. Local Programs: The following are existing water quality programs that have been
implemented within the Town of Cary MS4 service area.
3.1.1. Water Supply Watershed Protection
There are two water supply watersheds in the Town of Cary jurisdiction, the Swift
Creek Watershed and the Jordan Lake Watershed. Development in these areas
requires additional protective measures because they drain to water supply
reservoirs which provide drinking water to Raleigh and Cary. The North Carolina
Water Supply Watershed Protection Rules adopted in 1992 required that all local
governments having land use jurisdiction within water supply watersheds adopt
and implement water supply watershed protection ordinances, maps, and a
management plan. The adopted plans allow development within these watersheds
provided that certain conditions are met.
The Town administers a locally delegated program for protecting the Jordan Lake
Watershed and administers requirements of the Swift Creek Land Management
Plan. There are specific requirements for both low and high density development
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 2

projects. There is a 70% built-upon area cap for high density development in both
Swift Creek and Jordan Lake watersheds. Specific areas within the Swift Creek
watershed are subject to additional restrictions on built-upon area. Other
requirements for new development include stream buffer requirements and the
installation of Stormwater Control Measures (SCMs) for the control of stormwater
runoff(quality and quantity).
The Town of Cary accepts SCMs which are approved by the State for Total
Suspended Solids removal. The North Carolina Department of Environmental
Quality (DEQ), Division of Energy, Mineral and Land Resources (DEMLR) has
published the Minimum Design Criteria (MDC) that explains design requirements
for the different SCM devices that may be used for water quality protection.
These protective measures and the design calculations must be supplied during
the plan review process.
In an effort to ensure that the watershed protection devices will be maintained over
the life of the project, the Town of Cary requires that extensive documentation be
supplied and filed with Wake County Register of Deeds to ensure compliance. The
Town of Cary has a GIS database to track SCMs for compliance. The database
has a map of all post construction SCMs, inspection dates, owner information,
SCM information and compliance information. Annual inspections are required by
a qualified professional and all paperwork is maintained.
3.1.2. Sediment and Erosion Control
In 1985 the Town of Cary implemented a local sedimentation and erosion control
program. This program is modeled after the North Carolina Department of
Environment and Natural Resources sedimentation rules and regulations. The
Town of Cary's program is more restrictive in some cases. The Town of Cary's
Erosion Control Program ensures that developers in Cary's jurisdiction have
approved erosion control plans, obtain grading permits prior to any ground
disturbing activity and follow their approved erosion control plan. Periodic
inspection of construction sites ensure the projects are in compliance.
Erosion control plans must be supplied by the Financially Responsible Party of
any property that disturbs over 12,000 sq. ft. An erosion control plan consists of
erosion control measures sufficient to keep sediment on site. All items on the
erosion control check list must be addressed to have a complete erosion control
plan. The erosion control plan review is part of the regular plan review process.
Single family homes can disturb up to one acre without obtaining a grading
permit. However, an erosion control inspection is required prior to any other
inspection for single family homes and they are required to control erosion on
site.
The Town of Cary Sedimentation Erosion Control program has been recognized
by the North Carolina Sedimentation Control Commission as the annual
outstanding Erosion and Sedimentation Control Local Program.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 3

3.1.3. Neuse River Nutrient Sensitive Waters- Urban Stormwater Program
The Town administers a locally delegated program for urban stormwater
management. The Town of Cary Stormwater Management Program for Nitrogen
Control was adopted by the State of NC in October 2000. The local program
became effective in March 2001.The following summarizes the four program
areas required under the Neuse Stormwater Rule.
1. New Development Review/Approval
New development must meet the State's 30% total nitrogen (TN) reduction goal
by implementing planning considerations and stormwater best management
practices. The rule imposes a 3.6 pounds per acre per year (lb/ac/yr) nitrogen
loading limit on new development. In some cases, Nitrogen load from new
developments that exceeds this performance standard may be offset by payment
of a fee to the Division of Mitigation Services. In addition, new development must
control peak runoff from each site. And, 50 and 100 foot stream buffers must be
preserved.
2. Illicit Discharge Detection and Elimination (IDDE)
The Town will establish a program to prevent, identify and remove illicit
discharges. Illicit discharges are flows into the stormwater collection systems that
are not associated with stormwater runoff or an allowable discharge. Illicit
discharges enter the system through either direct connections (e.g., wastewater
piping either mistakenly or deliberately connected to the storm drains) or indirect
connections (e.g. broken sanitary systems, spills collected by drain outlets, or
paint or used oil dumped directly into a drain). The result is untreated discharges
that contribute high levels of pollutants, including heavy metals, toxics, oil and
grease, solvents, nutrients, viruses, and bacteria to receiving waterbodies.
Pollutant levels from these illicit discharges have been shown in EPA studies to
be high enough to significantly degrade receiving water quality and threaten
aquatic life, wildlife, and human health.
3. Retrofit Locations
Each year the Town of Cary must identify 4 potential sites for retrofitting existing
development to reduce total nitrogen loads. In urban areas, much of the
development took place prior to water quality rules requiring quantity or quality
controls for the reduction of stormwater impacts. Therefore, the Town of Cary will
conduct an annual review of potential sites for implementing SCMs to reduce
water quality impacts from developed areas. A list of potential sites will be
provided annually to the State. These will no longer be required by the State
when the new rules are approved and adopted by Cary.
4. Public Education
The Neuse Stormwater Rule requires the Town of Cary to develop an
environmental education program to address stormwater quality impacts
including nitrogen-loading issues. The public education action plan consists of
activities including local advertising, participation in a mass media campaign,
public workshops, brochures, participation in public events, and storm drain
labeling.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 4

3.1.4. Jordan Lake Nutrient Sensitive Waters— Stormwater Program
In August 2009, the State of NC adopted the Jordan Lake Nutrient Management
Strategy for the Cape Fear River Basin. The State requires a stage 1 management
plan for exiting development (outreach and education, public participation, IDDE
program, retrofit program), a riparian buffer ordinance, a management plan for new
development (nitrogen and phosphorus reduction), rules for agriculture and
forestry.
3.1.5. Urban Transition Buffer Protection
On July 27, 2000,the Cary Town Council approved an ordinance requiring riparian
buffers within the Town's jurisdiction and ETJ. The buffer rules were developed in
response to the Neuse River Basin NSW rules for nitrogen control and riparian
buffer protection. In 2012, the riparian buffer protection rules also included the
Jordan Lake watershed in response to the Jordan Lake NSW riparian buffer rules.
To protect its finite natural resources, Cary has a requirement to protect an
additional 50 feet beyond the state mandated riparian buffer rules for all channels
indicated on the USGS quadrangle. In 2008, the additional 50' of buffer protection
was modified and renamed an "Urban Transition Buffer" (UTB). Urban Transition
Buffers (UTBs or "buffers") provide a transition from waterbodies and
environmentally sensitive areas associated with waterbodies to areas which are
less fragile and appropriate for more intense uses and development. Some of the
benefits of UTBs are reducing the potential for increased nutrient loading by
limiting intense uses adjacent to waterbodies and environmentally sensitive areas
associated with waterbodies, minimizing danger to lives and properties from
flooding, preserving the water carrying capacity of the waterbodies, providing open
spaces, and maintaining the aesthetic qualities and appearance of the Town.
3.1.6. Floodplain Management
The Town of Cary has an adopted a floodplain management program since 1972
and is part of the National Floodplain Insurance Program (NFIP). The Town
requires sites to not encroach the floodplain and for subdivisions to not plat lots
within the floodplain. The Town also requires the lowest floor for a building be
elevated two feet above the base flood elevation.
3.1.7. Master Planning
Effective stormwater programs include a comprehensive planning process that
addresses water quality at the local level. Cary has begun incorporating
stormwater planning into its land use planning processes as needed to address
specific issues.
3.2. State Programs:
In July 1997, the State of NC adopted riparian buffer regulations for the Neuse River
Basin. The State requires 50 foot protected buffers on either side of streams as
indicated by the USGS or County Soil Survey map. The Town reviews site plans and
individual building permits for consistency with the State buffer rules. Any variance
from the State rules must be accomplished through negotiations between the applicant
and the State.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 5

4. Permitting Information.
4.1. Responsible Party Contact List:
Name TITLE Responsibility PHONE# FAX#
Sean Stegal Town Manger 919-469-4002
Danna Widmar Assistant Town Stormwater Division 919-460-4915
Manager
Dan Ault Assistant Town Public Works 919-469-4034
Manager
Jamie Revels Director of utilities Good Housekeeping 919-469-4303 919-469-4304
Matt Flynn, Director of Public Good Housekeeping / 919-469-4093 919-469-4304
Interim Works Facility Management
Billy E. Lee Stormwater Administration / 919-462-3932 919-460-4935
Engineering Contact Person
Manager
Charles Brown Stormwater Administration /
Program Analyst Regulatory Issues / 919-469-4038 919-460-4935
Illicit Discharge / Post
Construction
Lisa Booze Environmental Plan Review (Pre and
Specialist Post Construction) / 919-469-4030 919-460-4935
Erosion Control
/Floodplain
Administrator
Eric Kulz Environmental Permitting and
Specialist Riparian Buffer/UTB 919-469-3931 919-460-4935
Program/SCM O&M
Town owned
Open Stormwater Capital Projects 919-380-2773 919-460-4935
Engineer
Jan Patterson Stormwater Capital Projects 919-460-4930 919-460-4935
Engineer
Todd Hoefler Lead Stormwater Erosion Control 919-460-4934 919-460-4935
Engineering Inspections /SCM
Technician Compliance
Kirk Stafford Stormwater Erosion Control 919-462-3886 919-460-4935
Engineering Inspections /SCM
Technician Compliance
Jeff Hall Stormwater Erosion Control 919-380-2759 919-460-4935
Engineering Inspections /SCM
Technician Compliance
Richard Carter Civil Design Tech CAD/GIS 919-460-4932 919-460-4935
Betsie Winokur Facilities Division Good housekeeping 919-469-4361 919-469-4304
Manager Facilities
Brandon Pasinski Fleet Division Good housekeeping 919-469-4098 919-469-4304
Manager Fleet
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 6

Onganizational
Town Manager
Assistant Town
Manager L4ssistant Town
Manager
Operations f]evelopment Public Works
Manager fwlanager ����°r
Stormwater eniorStormwater
Engineer Engineering Tech
Facilities❑nrision Fleet Manager
Manager
Stonmwater Stonnwa#er
Engineer Engineering Tech
En+rironrnental Stonnwa#er Facility
Specialist Engineering Tech Coordinatiars
Cnril Design Tech Plan Reviewer
Outreach& Starmwater
Camrnuni�ations Program Analyst
Town of Cary NPDES - 11 StormwaterPermit

4.3. Signing Official:
Name: Sean Stegall
Position: Town Manager
Authority: Mr. Stegall is responsible for overseeing all departments within the
Town. Since success depends on actions from multiple departments
including Stormwater Division, Public Works, Utilities, Planning and
Parks, Recreation and Cultural Resources, it is imperative that final
authority come from a position overseeing all departments.
5. Co-Permitting Information - not applicable
6. Reliance on other government entity to satisfy one or more permit obligations - not
applicable
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 8

7. Stormwater Management Program Plan
The Town of Cary will develop, implement, and enforce a stormwater management
program (SWMP) designed to reduce the discharge of pollutants from Cary to the
maximum extent practicable (MEP), to protect water quality, and to satisfy the appropriate
water quality requirements of the Clean Water Act. The SWMP will be updated to comply
with the issued NPDES stormwater permit.
7.1. Public Education and Outreach on Storm Water Impacts: The Town of Cary will
implement a public education program to distribute educational materials to the
community and/or conduct equivalent outreach activities about the impacts of
stormwater discharges on water bodies and the steps that the public can take to
reduce pollutants in stormwater runoff.
7.1.1. BMP Summary Table (see Appendix B)
7.1.2. Target Audience:
The target audiences for the public education program include those entities
within Cary that may impact water quality conditions. Efforts will be made to
produce program ads and printed materials to accommodate the large Hispanic
population.
General Public: The general public has been targeted for educational program
based on potential impacts they can have on water quality conditions including
dumping oil and other wastes into storm drains, improper disposal of yard wastes
along creek banks, and improper application of pesticides and herbicides on
lawns. Also, other activities such as vehicle washing, failure to clean up pet
wastes and improper clean up from home improvement projects have been
targeted.
Commercial: Commercial facilities have been targeted for the educational
program based on potential impacts form improper handling and disposing of
wastes, making illicit connections to the storm drain system and practicing poor
housekeeping at their facilities. Some commercial facilities have a history of
water quality problems and will be specifically targeted through mailings,
brochures and presentations including:
Carpet Cleaning Companies—Targeted for illegal dumping of wastewater into
storm drains.
Restaurants—Targeted for improper handling of grease, trash and washwater
resulting in discharges to storm drains.
Automotive Repair Facilities—Targeted for improper handling of used oil and
other waste automotive fluids resulting in discharges to storm drains.
Car Dealerships-Targeted for improper vehicle washing practices.
Lawn Care Companies—Targeted for improper application of fertilizers and
herbicides resulting in discharges to storm drains. Blowing grass and leaves into
the storm drains.
7.1.3. Target Pollutant Sources:
Public education will target residential, commercial and industrial property owners
since these together total 82% of land use in Cary. The remaining land use is
primarily undeveloped property. Increased runoff from new development is the
most serious source of stream impairment - impacts include pollutant and debris
transport, sediment transport, streambank erosion and localized flooding.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 9

7.1.4. Outreach Program:
The Town Public Education and Participation Program is a measure required
under the NPDES Phase II Program. The Town's outreach strategy is based on
established Town public information opportunities including the Town's web site,
quarterly tips in the Cary utility bill insert, "BUD". Additional outreach activities are
planned annually such as participation in Town festivals/events and conducting
workshops.
7.1.5. Decision Process:
The stormwater education program was developed in response to the Neuse River
Urban Stormwater Rules. The program will emphasize impacts of urban runoff,
prevention of illegal discharges, and management of stream corridors.
7.1.6. Evaluation:
EDUCATION/OUTREACH FOR COMMERCIAL ACTIVITIES
• The number of educational materials that were distributed to business owners
and operators.
EDUCATIONAL DISPLAYS, PAMPHLETS, BOOKLETS, AND "BUD"
INSERTS
• List compiled of target audiences and possible activities for each.
• The number of materials distributed.
• The number of events attended with displays.
• The estimate of the number of people at an event who saw the display or took a
pamphlet/booklet.
PROMOTIONAL GIVEAWAYS
• The number of items given out.
• The number of events attended (to give out items).
• The number of block leaders who delivered items.
USING THE MEDIA
• The number of public service announcements made on radio and TV.
• The number of storm-water-related press releases.
• The number of storm-water-related articles published.
7.2. Public Involvement and Participation: Staff will make a presentation to the Town
Council and the general public summarizing the content of the permit. Public
comments will be accepted.
7.2.1. BMP Summary Table (see Appendix B)
7.2.2. Target Audience:
The target audience for the Public Involvement and Participation Program
includes all age, ethnic and economic groups in the Town of Cary. The Program
will actively involve all potentially effected stakeholder groups, including
commercial and industrial facilities, trade associations, environmental groups,
homeowners associations, civic groups and educational organizations.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 10

7.2.3. Participation Program:
EPA recommends that the public be included in developing, implementing, and
reviewing the stormwater management program, and that the public participation
process should make efforts to reach out and engage all economic and ethnic
groups. Cary provides activities for public participation in stormwater
management and opportunities for public involvement/review of the stormwater
program.
Activities/public participation
• Storm drain labeling
• Stream cleanup
• Adopt-A-Spot program
Involvement/public opinion
• Hold public hearings on stormwater issues including ordinance revisions
• Facilitate public meetings as needed on specific topics
• Survey citizens as needed for research and targeted for education program
• Environmental Advisory Board
7.2.4. Decision Process:
The core of the public involvement program already exists. Storm drain labeling
was begun in response to Neuse River Stormwater requirements. The Town
established its program prior to adopting its stormwater ordinance. The Adopt a
Spot program was established in order to get environmental information to the
citizens. This program was expanded to include stormwater information. The
Recycling Program already sponsors litter clean-up activities and will lead to future
litter control programs such as "Adopt a Spot".
Ordinances are always adopted through public form as part of the Town Council
meetings. Stormwater ordinances and management plans will go to Town
Council for review and approval and will be available for public review and
comment. Additional efforts to gather public input may include public meetings
and citizen surveys. The Town does not plan to establish a stormwater
stakeholders group. The Town has an Environmental Advisory Board formed in
2008 to discuss issues concerning stormwater and other environmental issues
needed.
7.2.5. Evaluation
COMMUNITY HOTLINES/REPORTING FORM
•A phone number has been posted on the website for people to contact
concerning stormwater issues. The Town has created a reporting form on the
website for people to report stormwater issues.
• The number of calls/reports received.
• The number of problems/incidents remedied.
LITTER PROGRAMS
• Establish litter program (Big Sweep)
• Track the number of participants.
• The quantity of trash and debris removed by volunteers.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 11

PUBLIC MEETINGS
• The number of meetings held.
• The number of attendees.
• Actions taken as a result of stakeholder meetings.
STORM DRAIN LABELING
• The number or proportion of drains labeled.
• The number of labeling volunteers.
STREAM CLEANUP
• The number of stream cleanups.
• The number of cleanup participants.
• The quantity of waste collected as a result of cleanup efforts.
• The number of stream miles cleaned.
7.3. Illicit Discharge Detection and Elimination: The Town of Cary has developed and
implemented a program to detect and eliminate illicit discharges
7.3.1. BMP Summary Table (see Appendix B)
7.3.2. Storm Drain System Map:
The Town initiated a stormwater infrastructure inventory in 2002 to comply with
the Neuse River Stormwater Rules. The field crews will visit all stormwater
structures, collect data describing each structure and determine the x, y, z
coordinates to survey grade. The Town has finished the inventory and adds
additional infrastructure when as-builts are submitted. We require them to be
survey grade to ensure they are placed into the system through our CAD techs.
7.3.3. Regulatory Mechanism
In March 2001, the Town of Cary's Illicit Discharge Ordinance became effective.
This ordinance provides the Town with the basic legal tools to conduct
investigations, determine sources of illicit discharges and enforce the termination
of illicit discharges up to, and including, fines. This ordinance was developed to
comply with the Neuse River Stormwater Rules.
7.3.4. Enforcement
Town staff will be cross-trained to recognize and report illegal discharges. Staff to
be trained includes code enforcement officers, inspectors and police & fire
personnel.
7.3.5. Detection and Elimination
7.3.5.1. Locating Problem Areas
Illegal discharges and illicit connections to the Town's separate storm drain
system will be identified using the following techniques:
• Town employees will be trained to observe and report possible illegal
discharges. Training of Water Resources, Public Works, Utilities, Building &
Inspection Services to also be observant for illicit connections during their
daily job functions will be conducted annually.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 12

• Dry weather field screening of outfalls will be conducted annually. Dry
weather is defined as periods where there has not been precipitation or snow
melt for 2 days. The location screened will be located on the community map
of the storm drain system.
• Outfalls potentially discharging polluting material during dry weather periods
will be tested based on visual observations in the stream for odor, color,
clarity, etc. Field screening tests will also indicate a problem if issues are not
noted by visual observations. Field screen tests are for pH, dissolved
oxygen, temperature and conductivity.
• The complaint system will be enhanced in cooperation with the existing
efforts to encourage reporting of suspicious discharges. Cary will enhance
the complaint system to log complaints, assign them for follow up and
document results of investigations. Cary has a 311-call system that we can
use to track stormwater concerns and close out of issues. Using salesforce
to create and track concerns.
7.3.5.2. Finding the Source
• Prioritization of sources that are discharging polluting material will be as
follows:
• Complaints related to the discharge of polluting materials will be investigated
as they are reported. Currently, calls relating to discharging of improper
materials into the separate storm drain system are reported to the
Stormwater Division or to the Utilities Department and then forwarded to
Stormwater Division. The complaints are investigated.
• Water sampling and testing for pH, DO and conductivity will be conducted as
necessary to locate the source of the illicit discharge.
• Investigation of suspicious discharges will be made by visual inspection
and/or testing of discharges within the storm drainage system upstream of
the suspicious discharge. Other options that will be considered in locating
illicit connections or discharges include televising the storm drain or dye
testing premises in the area where there is a discharge. Letters may be sent
to residents and businesses alerting them to the problem that is under
investigation to solicit their assistance in finding the source.
7.3.5.3. Removing/Correcting Illicit Connections
• The Town of Cary has developed a map identifying outfalls to waters of the
state under Cary jurisdiction
• Existing ordinances will be used to address illicit discharges and
connections. Assistance may be requested from the Wake County
Department of Environmental Health or the NC Division of Water Resources
to obtain correction. If an ordinance change is needed to correct illicit
discharges, the changes will be presented to the Town Council after it is
determined that existing ordinances are inadequate to require correction.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 13

• The Town of Cary Stormwater Division will manage the Illicit Discharge
Detection & Elimination Program. Cary's Stormwater Engineering Manager
or his designee will be responsible for implementing the plan.
7.3.6. Non Stormwater Discharges
The following categories of non-stormwater discharges or flows (i.e., illicit
discharges) will be examined.
a) Water line flushing, dechlorinated swimming pool discharges, and street wash
water will be investigated and efforts made to reduce their impact on surface
water quality.
b) Discharges from potable water sources, irrigation water, lawn watering, and
individual residential car washing will be managed via the public education
program and monitored by the water conservation program.
c) Air conditioning condensation will be investigated on a case by case basis.
7.3.7. General Prevention
• The Town of Cary inspects installation of all new storm drains in the R/W and
sanitary sewers.
• All activities will be tracked on the Town of Cary's Geographical Information
System (GIS).
7.3.8. Decision Process
The stormwater Illicit Discharge Detection and Elimination Program was
developed in response to the Neuse River Urban Stormwater Rules. The program
will emphasize prevention of illegal discharges through regulation and education.
The ordinance will be enforced as needed but the emphasis when a discharge is
found will be education and elimination of the discharge. Limited field screening
will take place in targeted areas. Approximately 21 percent of the Town is
commercial / industrial so field screening will target those areas mainly. The
inventory will provide the first inspection. Efforts will be made at cross training
Town staff in recognition of illegal discharges so that Stormwater staff can focus
on follow-up.
7.3.9. Evaluation
Dry Weather Screening and Reporting
• A summary report of complaints received, investigated and the results of the
investigation will be prepared.
• Suspicious outfalls that had a dry weather flow during visual screening will be
tested for suspected pollutants.
• A summary report of premises found to be improperly connected to the storm
drain or sanitary sewer will be prepared.
• A list of outfalls screened will be prepared.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 14

7.4. Construction Site Stormwater Runoff Control: The Town of Cary currently manages
a program to reduce pollutants in stormwater runoff from construction activities that
result in a land disturbance of greater than or equal to 12,000 square feet. The Town
complies with the State Erosion and Sediment Control Program for a locally
delegated program.
7.4.1. Erosion Control Ordinance
The Town of Cary operates a local sedimentation program that is regulated by
the State of North Carolina under the State Sedimentation Erosion Control Rules
and Laws. A copy of our ordinance is attached.
7.4.2. Plan Review
All projects that disturb 12,000 square feet or more require an erosion control
plan and grading permit. This review is part of the overall Town of Cary
Site/Subdivision plan submittal process. The review will include water quality
reviews for total suspended solids in drinking water supply watersheds and
nutrient removal review in the town's jurisdiction. Before a grading permit is
issued on a project in the Town of Cary jurisdiction a pre-construction meeting is
held to review erosion control and water quality issues.
7.4.3. Enforcement
The Town of Cary follows the State of North Carolina rules for enforcement
relative to the Sedimentation Erosion Control laws. Fines of up to $5,000 per day
can and are imposed if compliance is not achieved. The Town of Cary also uses
other methods such as holding permits and certificates of Occupancies to ensure
compliance with water quality issues.
7.4.4. Inspections
Each Stormwater Engineering Technician is responsible for all the projects
located in their area of responsibility. The technician prioritizes projects
depending on the phase of construction, history of the site and project
complexity. The Stormwater Engineering Technician makes observations of the
site and writes a report noting corrections required to bring the site into
compliance. A reasonable amount of time is allowed to correct violations. If
compliance is not achieved the project will be placed under violation until
corrections are made.
7.4.5. Public Information
Any public complaints received for a specific project are investigated and
addressed relative to the complaint.
7.4.6. Decision Process:
Construction site stormwater runoff control plans are submitted and designed by
professional engineers based on the Land Development Ordinance and
Standards and Specifications of the Town of Cary. If insufficient or incorrect data
is submitted then comments are returned to the applicant and corrections are
made. This process continues until an acceptable plan is developed and at that
point a grading permit can be issued.
Town of Cary NPDES Phase II Stormwater Permit Narrative 15

7.4.7. Evaluation
Monthly reports are submitted to Wake County and the NC Division of Land
Quality. The monthly report to Wake County summarizes new permits issued by
the Town.
The following items are reported monthly to the State,
1. Number of new sedimentation control projects
2. Number of plans reviewed
3. Number of permits issued
4. Number of site inspections conducted
5. Number of Single Family Residence inspections
6. Number of Notices of Violation issued
7. Number of Cases referred for enforcement
8. Total Disturbed Area
A summary report is also maintained within the Water Resources Department.
7.5. Post-Construction Stormwater Management in New Development and
Redevelopment: The current program was developed to comply with the State's
Watershed Water Supply Protection requirements, Neuse NSW requirements for
urban stormwater, NPDES Phase 2 permit and the Jordan Lake NSW requirements
for stormwater. The current program addresses stormwater runoff from new
development and redevelopment projects that disturb greater than or equal to 12,000
square feet. All subject projects must control peak flow and meet designated
nitrogen and/or phosphorus targets. The current stormwater ordinances are included
in Appendix C.
The Town of Cary shall amend its stormwater ordinances as needed to meet the
requirements of the State's Phase II rules for post-construction. And, the Town will
partner with the State as needed to develop and implement area specific watershed
plans which may have alternate strategies for preventing or minimizing water quality
impacts using structural and non-structural SCMs.
The ordinances meet the following requirements:
Low density option
1) Less than 24% built-upon area Jordan Lake and other watersheds and 12%
within certain areas of the Swift Creek Watershed.
2) Stormwater runoff from the development shall be transported from the
development by vegetated conveyances to the maximum extent practicable:
High density option
Projects exceeding the low density threshold (established above in low density
section) shall implement stormwater control measures that:
1) Control and treat the difference in stormwater runoff volume leaving the project
site between the pre and post development conditions for the 1 year 24 hour
storm. Runoff volume drawdown time shall be a minimum of 24 hours, but not
more than 120 hours;
2) All structural stormwater treatment systems used to meet the requirements of
the program shall be designed to meet MDC requirements.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 16

3) General Engineering Design Criteria for all projects shall be in accordance with
the State of NC MDC and state rules;
Urban Transition Buffers
The Town's local buffer ordinance adds an additional buffer on top of the riparian
buffer that the State of NC regulates in the Neuse and Cary regulates in the Jordan
Lake.
7.5.1. BMP Operations and Maintenance
The Town's program includes an operation and maintenance component that
ensures the adequate long-term operation of the structural SCM's required by the
program. These SCMs are privately owned and operated. The Town requires an
annual SCM maintenance inspection report on each structural SCM. Staff
corresponds with the SCM owners to facilitate the inspection and maintenance or
corrective actions.
7.5.2. On-Site Wastewater Systems
The Town of Cary does not evaluate permit applications or inspect installation of
on-site wastewater disposal systems (OSWW), also referred to as septic
systems. These functions are conducted by the Wake County Environmental
Health Department or, in the case of large discharges NC Department of
Environmental Health. The Town will coordinate its illegal discharges from
OSWW with the Wake County EHD to assist in mitigating problems with seeping
OSDS. In the past, the Town has had a history of extending sanitary sewers to
service areas of failing OSDS when funds are available. The Town does not
encourage the use of OSDS for new development and requires the project
proponent to be responsible for such infrastructure improvements.
Sanitary sewer systems operated by The Town of Cary are designed to service
the lowest floor levels (basements) of buildings in the community. Sanitary
sewers are required to be 18 inches below storm drains thus minimizing the
potential for an illicit connection emanating from a separate sanitary sewer.
OSWW found to be experiencing problems or failing will be referred to the Wake
County Environmental Health Department. If sanitary sewers are not available,
short and long term solutions for sewage disposal must then be devised.
• If overflows of sanitary sewer manholes or cross connections to a storm drain
are detected, they will be addressed as part of the Town's sewer
maintenance program. If an immediate solution is not practical, a plan will be
developed to solve the problem.
• For additions to existing facilities which have existing OSWW, Cary will
require an evaluation of the septic system by the Wake County EHD. This
will be required prior to the Town signing off for the building permit.
7.5.3. Nutrient Sensitive Waters
The Town of Cary service area drains to Nutrient Sensitive waters in both the
Neuse and Cape Fear River Basins. A Department approved NSW Urban
Stormwater Management Program became effective in March 2001 and its
provisions shall fulfill the requirement for reducing nutrient loading.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 17

The Town developed and implemented comprehensive watershed protection
plans to meet part, or all, of the requirements for Post-Construction Stormwater
Management in New Development.
7.5.4. BMP Summary Table (see Appendix B)
SCM INSPECTION AND MAINTENANCE
• The frequency of inspection and maintenance of SCMs.
• The number of failed stormwater SCMs.
• The number of sites reported to be in need of repair.
• Inventory of inspection and maintenance activities was created and is regularly
maintained.
7.5.5. Non-Structural SCMs
The Town of Cary directs growth to identified areas, protects sensitive areas such
as wetlands and riparian areas, maintains and/or increases open space provides
buffers along sensitive water bodies, and minimizes disturbance of soils and
vegetation through adopted land use plans and by policy or ordinance.
a) Land Use Plans - Growth is directed to specific areas through land use plans
that are developed with public input and adopted by the Town Council. These
plans provide guidance for the development community.
b) Local riparian buffer ordinance
c) Urban Transition Buffer
d) Streetscape buffer requirements
e) Open space program with dedicated funding from utility billing
f) Greenway program
g) Tree preservation ordinance
h) Minimize soil and vegetation loses - In addition to the erosion control program,
the Town developed a steep slope ordinance.
7.5.5.1. Policies or ordinances that encourage infill development in higher
density urban areas, and areas with existing storm drain infrastructure;
(1) Town Center Area Plan to encourage infill development downtown
(11) Land use plans to concentrate high density growth
(111) Master planning
7.5.5.2. Education programs for developers and the public about project designs
that minimize water quality impacts
(1) Contractor training for grading contractors
(11) Workshops as needed to train engineers and architects on new
ordinances
7.5.5.3. Other measures such as minimization of the percentage of impervious
area after development, use of measures to minimize directly connected
impervious areas, and source control measures often thought of as good
housekeeping, preventive maintenance and spill prevention.
(1) Will be addressed through specific area plans
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 18

7.5.6. Structural SCMs
The Town allows the use of structural SCMs as approved by the State of NC
MDC.
a) Wet ponds and extended-detention outlet structures are approved structural
SCMs for stormwater use
b) Filtration practices such as grassed swales, bioretention cells, sand filters
and filter strips are approved structural SCMs for stormwater treatment
7.5.7. Regulatory Mechanism:
Post-construction runoff is addressed through a local ordinance
7.5.8. Operation and Maintenance
Long-term operation and maintenance (O&M)of on-site SCMs is ensured through
legal documentation filed with the Wake County Register of Deeds and through
financial bonds which must be posted to the Town for each project.
7.5.9. Decision Process
The development of a post-construction stormwater management program was
done in response to State regulations for Water Supply Watershed Protection and
the NSW rules for protection of the Neuse River. Your rationale statement must
address your overall post-construction stormwater management program and the
individual SCMs, measurable goals, and responsible persons for your program.
The rational statement must include the following information, at a minimum:
7.5.9.1. Your program to address stormwater runoff from new development and
redevelopment projects. Include in this description any specific priority
areas for this program.
7.5.9.2. How your program will be specifically tailored for your local community,
minimize water quality impacts, and attempt to maintain pre-
development runoff conditions.
7.5.10. Evaluation
A spreadsheet is maintained for each project which includes pre-and post-loading
conditions. An annual report is submitted to the Division of Water Quality each
year summarizing new development including nitrogen loading.
7.6. Pollution Prevention/Good Housekeeping for Municipal Operations: The Town of
Cary will develop and implement an operations and maintenance program that
includes a training component and has the ultimate goal of preventing or reducing
pollutant runoff from municipal operations including the Town-owned or operated
portion of the stormwater conveyance system.
Using training materials that are available from EPA, State, Tribe, or other
organizations, the Town will train employees to prevent and reduce stormwater
pollution from activities such as park and open space maintenance, fleet and building
maintenance, new construction and land disturbances, and stormwater system
maintenance.
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7.6.1. BMP Summary Table (see Appendix B)
7.6.2. Affected Operations
The following municipal facilities and operations are impacted by this operation
and maintenance program. These programs will be evaluated and revised to
ensure that the programs minimize pollutant loading. Facilities will be inspected to
identify and eliminate exposure to stormwater. Corrective actions will be taken or
BMPs installed as needed.
Programs
• park and open space maintenance (PW)
• buildings and grounds maintenance (PW)
• fleet maintenance (PW)
• stormwater system maintenance (PW)
• sanitary sewer and water line maintenance procedures (UT)
• solid waste collection procedures (PW)
• street cleaning (PW)
• yard waste and leaf collection procedures (PW)
• new construction and land disturbances (Stormwater Division)
• road construction and maintenance practices (PW)
Facilities
• North Cary Water Reclamation Facility - Permit# NC0048879
• South Cary Water Reclamation Facility - Permit# NC0065102
• Western Wake Water Reclamation Facility— Permit# NC0088846
• Fleet Maintenance Facility
• Dixon Citizen Convenience Center
• Bond Park
• USA Baseball Complex
• State Capital Soccer(Wake Med)
• Operations Center
• Middle Creek
7.6.3. Training
Employee training programs will be developed for preventing and reducing
stormwater pollution from activities including:
• park and open space maintenance (PW)
• fleet and building maintenance (PW)
• stormwater system maintenance (PW)
• sanitary sewer and water line maintenance procedures (UT)
• solid waste collection procedures (PW)
• street cleaning (PW)
• yard waste and leaf collection procedures (PW)
• new construction and land disturbances (Stormwater Division)
• road construction and maintenance practices (PW)
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 20

7.6.4. Maintenance and Inspections
Maintenance of stormwater structures within the road right of way (R/W) is
conducted as needed by the Town's Department of Public Works. Problems are
found usually due to flooding problems and/or citizen complaints.
The Town is developing a condition assessment program for stormwater,
wastewater and drinking water structures within the R/W.
7.6.5. Vehicular Operations
The Town has a non-exposure permit at this facility with the intent of
implementing controls for reducing or eliminating the discharge of pollutants from
municipal parking lots, maintenance and storage yards, waste transfer stations,
fleet or maintenance shops with outdoor storage areas, and salt/sand storage
locations and snow disposal areas as needed. Currently, stormwater is caught
and filtered through drain guards and directed into a detention pond and
constructed wetland at the Town's fleet and maintenance shops.
Waste Disposal
MS4 Conveyance System
Maintenance of stormwater structures within the road R/W is conducted as
needed. Inlets and outlets are cleared to ensure free flowing conditions. Blocked
catch basins, pipes and other man-made structures within the R/W are cleaned
with jet-vac equipment or by hand. Floatables are collected and removed to landfill.
Other material is off loaded at a drop off site and drained to a settling basin. Once
dried, material is disposed of according to State and Federal regulations.
Operations Center
All stormwater flows to a retention pond or constructed wetland at the Operations
Center on James Jackson Avenue. Monthly vegetation is mowed and floatables
collected and removed to landfill. The ponds are inspected on an annual basis by
a third party.
Recycling Material Transfer Yard
Litter and trash are picked up and yard maintained by attendant.
Bond Park Maintenance Facility
Litter is collected on a weekly basis and disposed of in the landfill.
Street Sweepers
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 21

Residential streets are cleaned four times per year, major streets are cleaned
monthly. Downtown streets are cleaned weekly. Collected material is off loaded at
a drop-off area connected to a settling basin. Once dried, material is disposed of
according to State and Federal regulations.
7.6.6. Flood Management Projects
Lakes used for flood control in the Crabtree Creek Watershed are managed by
Wake County. The Town of Cary has Policy 35 & 146 which offer assistance to
private property owners with flooding issues. Policy 35 is a cost share program for
homeowners and Policy 146 assists with flooding issues from town maintained
storm drain structures.
7.6.7. Existing ordinances
Stormwater ordinances are reviewed and revised as needed. Currently, we are
making revisions twice per year as the program develops and situations arise.
Relevant ordinances include,
• 3.12 Development in Flood Hazard Area
• 3.13 Grading Permits
• 4.4.6 Watershed Protection
• 7.2.14 Urban Transition Buffer
• 7.3 Stormwater Management
• 7.4 Soil Erosion and Sedimentation Control
• 7.5 Flood Damage Prevention
• 8.1.4 Subdivision & Site Plan GP Storm Drainage
• 11 Enforcement
7.6.8. Other evaluations
If other aspects of your municipal operation were evaluated, please describe the
program feature and the results of the evaluation.
• Oil recycling program
• Spill response procedures
• Hazardous waste inventory
Cary collects and has oil recycling done by a contractor. Spill response plans
were designed and in place for municipal operations.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 22

7.6.9. Decision Process
The development of a pollution prevention/good housekeeping program for
municipal operations is required to minimize pollutant loading from Town
operations or facilities. By training staff and evaluating programs and facilities
annually, Cary can minimize pollutant loading to the maximum extent practical.
7.6.10. Evaluation
FLEET MAINTENANCE
• The number of employees trained in preventing pollution from fleet
maintenance activities.
MATERIALS MANAGEMENT
• The number of facilities storing hazardous materials.
• The frequency of inspection and maintenance visits to storage facilities.
• The number of personnel trained in hazardous material handling and storage.
•Whether or not an inventory of hazardous materials was created for each
storage facility.
PARKING LOT AND STREET CLEANING
•Whether or not roads and parking lots were inventoried and prioritized for
cleaning.
• The number of scheduled road cleanings.
• The pounds of debris collected from street sweeping.
ROAD SALT APPLICATION AND STORAGE
• The number of storage facilities included in a regular inspection and
maintenance program.
• The number storage facilities repaired.
• The number of employees trained in road salt application.
• The quantity of salt applied to roadways.
• The quantity of alternative products used.
SPILL RESPONSE AND PREVENTION
•Whether or not an inventory of municipal facilities at risk for spills was created.
• The number of leak detection devices installed at municipal facilities.
• The number of preventative maintenance procedures performed on tanks,
valves, pumps, pipes, and other equipment.
•Whether or not a spill response plan was developed for municipal facilities.
• The number of personnel trained in spill response.
• The number of regularly inspected high-risk facilities.
STORM DRAIN SYSTEM CLEANING
• The number of catch basins &culverts cleaned annually
• The amount of trash, sediment, and other pollutants removed during cleaning.
USED OIL RECYCLING
• The number of gallons of used oil collected from municipal operations.
• The number of recycling facilities that collect oil from municipal operations.
• The number of educational materials distributed to municipal employees.
VEHICLE WASHING
• The number and locations of designated washing areas.
Town of Cary NPDES Phase 11 Stormwater Permit Narrative 23