MOORESVILLE_COMPLETE FILE - HISTORICAL_20080731

'STORMWATER DIVISION CODING SHEET
Municipalities NOT MS4
PERMIT NO.
NCS0000_Y� S V C
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DOC TYPE
❑ COMPLETE FILE - HISTORICAL
MOST RECENT
❑ C� 2 1
DATE
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USI%US INFRASTRUCTURE OF CAROLINA, INC.
0 CONSULTING ENGINEERS
July 31, 2008
North Carolina Department of Environmental Resources
Division of Water Quality
Stormwater and General Permits Unit
Attn: Mike Randall
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJECT: Town of Mooresville
Draft NPDES Stormwater Permit Application
Dear Sir:
US Infrastructure of Carolinas, Inc. is serving as an agent for the Town of Mooresville to
assist in developing their NPDES Stormwater Permit Application. At the request of the
Town and per the North Carolina Department of Environmental Resources, Division of
Water Quality (DWQ) instructions, we are submitting three (3) draft NPDES Stormwater
Permit Applications and proposed Comprehensive Stormwater Management Program
Reports.
We look forward to hearing your comments. Should you have any questions, please call
us at [phone].
Sincerely,
US Infrastructure of Carolina Inc.
Stephen R. Sands, P.E.
Associate
cc: Mayor - Bill Thunberg
Interim Town Manager--- Erskine Smith
Public Service Director John Vest
' Engineering Manager — Ryan Rase
IAttachments
1043 E. Morehead St. • Suite 203 • Charlotte, NC 28204
' [phone] • Fax [phone]
E-mail: [e-mail]

State of North Carolina OFFIC USE ONLY
Department of Environment & Natural Resources Date Rec'd
a Division of Water Quality Fee Paid
Permit Number
NPDES STORMWATER PERMIT APPLICATION FORM
This application form is for use by public bodies seeking NPDES stormwater permit coverage for Regulated Public
Entities (RPE) pursuant to Title 15A North Carolina Administrative Code 2H .0126. A complete application
package includes this form and three copies of the narrative documentation required in Section X of this form.
This application form, completed in accordance with Instructions for completing NPDES Small M54 Stormwater
Permit Application (SWU-270) and the accompanying narrative documentation, completed in accordance with
Instructions for Preparing the Comprehensive Stormwater Management Program Report (SWU-268) are both
required for the application package to be considered a complete application submittal. Incomplete application
submittals may be returned to the applicant.
' I. APPLICANT STATUS INFORMATION
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a.
Name of Public Entity
Town of Mooresville
Seeking Permit Coverage
b.
Ownership Status (federal,
Local
state or local
c.
Type of Public Entity (city,
Town
town, county, prison, school,
etc.
d.
Federal Standard Industrial
SIC 91 - 97
Classification Code
e.
County(s)
Iredell
f.
Jurisdictional Area (square
20.1
miles
g.
Population
Permanent
18,823 (2000 US Census Bureau data)
Seasonal (if available)
h.
Ten-year Growth Rate
7.0% per annum (US Census Bureau 1990 to 2000 data)
i.
Located on Indian Lands?
❑ Yes ®No
1 II. RPE / MS4 SYSTEM INFORMATION
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a.
Storm Sewer Service Area
(square miles
20.1
b.
River Basin(s)
Catawba, Yadkin/ Pee -Dee
c.
Number of Primary Receiving
Streams
10 — Back Creek, Dye Branch, Rocky River, South Fork Withrow
Creek, and West Branch Rocky River in the Yadkin watershed.
Byers Creek, Davidson Creek, McCrary Creek, Reeds Creek, and
Wolf Creek in the Catawba watershed
d.
Estimated ercenta e of jurisdictional
area containing the following four land use activities:
•
Residential
5.9%
•
Commercial
2.9%
•
Industrial
3.0%
•
Open Space
88.2%
Total =
100%
e.
Are there significant water
qualityissues listed in the
®Yes ❑ No
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SWU-264-103102

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NPDES RPE Stormwater Permit Application
attached application report?
III. EXISTING LOCAL WATER QUALITY PROGRAMS
a. Local Nutrient Sensitive Waters Strategy
❑ Yes ® No
b. Local Water Supply Watershed Program
® Yes ❑ No
c. Delegated Erosion and Sediment Control Program
❑ Yes ® No
d. CAMA Land Use Plan
❑ Yes ® No
IV. CO -PERMIT APPLICATION STATUS INFORMATION
(Complete this section only if co -permitting)
a. Do you intend to co -permit with
El Yes ®No
a permitted Phase I entity?
b. If so, provide the name and permit number of that entity:
• Name of Phase I MS4
N/A
• NPDES Permit Number
N/A
c. Do you intend to co -permit
Yes ®No
with another Phase II entity?
d. If so, provide the name(s) of
N/A
the entity:
e. Have legal agreements been
finalized between the co-
❑ Yes ® No
ermittees?
V. RELIANCE ON ANOTHER ENTITY TO SATISFY ONE OR MORE OF YOUR PERMIT OBLIGATIONS
(If more than one, attach additional sheets)
a. Do you intend that another
entity perform one or more of
our permit obligations?
❑ Yes ® No
b. If yes, identify each entity and the element they will be implementing
• Name of Entity
N/A
• Element they will implement
N/A
• Contact Person
N/A
• Contact Address
N/A
• Contact Telephone Number
N/A
c. Are legal agreements in place
to establish responsibilities?
El Yes ®No
VI. DELEGATION OF AUTHORITY (OPTIONAL)
The signing official may delegate permit implementation authority to an appropriate staff member, This
delegation must name a specific person and position and include documentation of the delegation action
through board action.
a. Name of person to which permit authority
Mr. Erskine Smith
has been delegated
b. Title/position of person above
Assistant Town Manager
c. Documentation of board action delegating permit authority to this person/position must be
provided in the attached application report.
Page 2
SWU-264-103102

NPDES RPE Stormwater Permit Application
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VII. SIGNING OFFICIAL'S STATEMENT
Please see the application instructions to determine who has signatory authority for this permit
application. If authority for the NPDES stormwater permit has been appropriately delegated through
board action and documented in this permit application, the person/position listed in Section VI above
may sign the official statement below.
I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Signature
Name
Mr. Erskine Smith p
Title
Assistant Town Manager To rd�I�
Street Address
413 North Main Street
PO Box
PO Box 878
City
Mooresville
State
North Carolina
Zip
28115
Telephone
704-662-3188
Fax
E-Mail
[e-mail]
VIII. MS4 CONTACT INFORMATION
Provide the following information for the person/position that will be responsible for day to day
implementation and oversight of the stormwater program.
C'V�
btzl-
a.
Name of Contact
Person
Mr. Ryan Rase, P.E.
b.
Title
Engineering Department Manager
c.
Street Address
413 North Main Street
d.
PO Box
PO Box 878
e.
City
Mooresville
f.
State
North Carolina
g.
Zip
28115
h.
Telephone Number
704-663-4510
i.
Fax Number
704-662-6298
j.
E-Mail Address
[e-mail]
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SW13-264-103102

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NPDES RPE Stormwater Permit Application
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IX. PERMITS AND CONSTRUCTION APPROVALS
List permits or construction approvals received or applied for under the following programs. Include contact
name if different than the person listed in Item VIII. If further space needed, attach additional sheets.
a. RCRA Hazardous Waste
Management Program
b. UIC program under SDWA
c. NPDES Wastewater Discharge
Permit Number
d. Prevention of Significant
Deterioration (PSD) Program
e. Non Attainment Program
f. National Emission Standards for
Hazardous Pollutants (NESHAPS)
reconstruction approval
g. Ocean dumping permits under the
Marine Protection Research and
Sanctuaries Act
h. Dredge or fill permits under
section 404 of CWA
X. NARRATIVE APPLICATION SUPPLEMENT: STORMWATER MANAGEMENT PROGRAM REPORT
Attach three copies of a comprehensive report detailing the proposed stormwater management program for
the five-year permit term. The report shall be formatted in accordance with the Table of Contents shown
below. The required narrative information for each section is provided in the Instructions for Preparing the
Comprehensive Stormwater Management Program Report (SWU-268). The report must be assembled in the
following order, bound with tabs identifying each section by name, and include a Table of Contents with
page numbers for each entry.
TABLE OF CONTENTS
1. STORM SEWER SYSTEM INFORMATION
1.1. Population Served
1.2. Growth Rate
1.3. Jurisdictional and M54 Service Areas
1.4. MS4 Conveyance System
1.5. Land Use Composition Estimates
1.6. Estimate Methodology
1.7. TMDL Identification
3. EXISTING WATER QUALITY PROGRAMS
3.1. Local Programs
3.2. State programs
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SWU-264-103102

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NPDES RPE Stormwater Permit Application
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
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SWU-264-103102

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1. STORM SEWER SYSTEM INFORMATION
1.1. Population Served
Based on United States Census Bureau data, the population of Mooresville in the year 1996
was 9,317, year 2000 was 18,823, and year 2006 was 20,944. The value of 18,823 for year
2000 is the same value used by the North Carolina Office of State Budget and Management
for year 2000. While other sources of data are available from multiple sources, the applicant
believes that the data from both of the listed sources, US Census and Office of State Budget
and Management, is the most accurate.
1.2. Growth Rate
The US Census data indicates that the Mooresville population more than doubled between
1990 and 2000 from 9,317 to 18,823, equating to 7.0 percent growth per year. The growth
rate decreases somewhat from the period from 2000 to 2006 during which the population
increased from 18,823 to 20,944, an average growth rate of 1.8 percent. The majority of the
Town's growth is due to additional service areas being added through the annexation
process.
1.3. Jurisdictional and MS4 Service Areas
According to the United States Census Bureau, the town had a total area of 14.7 square
miles (38.1 km2) in 1990. Town records, dated 2006, indicate that the Town service area is
20.1 square miles, equating to an incorporated area growth rate of 2.0 percent.
1.4. MS4 Conveyance System
The Town of Mooresville has a network of open ditches, swales, pipes, culverts and
stormwater BMP's that is within the incorporated limits. All of the drainage systems begin in
the Town limits. The length of the major system (approximately larger than 36-inch pipes) is
26.6 miles. Based on typical urban drainage system parameters, the length of closed pipes
' and culverts is expected to be in the range of 12.0 miles and open channel segments to be in
the range of 14.6 miles.
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1.5. Land Use Composition Estimates
According to the North Carolina Department of Environment and Natural Resources
(NCDENR), the Catawba and Pee -Dee River Basinwide Assessment Reports ( 2003, 2004),
land composition in the service area is mostly cataloged into four land use categories. They
are: Forest, Surface Water, Urban, and Agriculture. The average percentages for each
category are:
- Forest - 59%,
- Surface Water- 5%,
- Urban- 4.5%,
- Agriculture — 31.5%.
Research of the land cover databases provided by the North Carolina OneMap indicates that
the average land cover percentages within the Town of Mooresville are:
- Forest — 52.1%,
- Surface Water - 0.3%,
- High Intensity Urban — 5.9%,

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Low Intensity Urban — 5.9%,
Agriculture — 29.8%,
Un-determined — 6.0%.
1.6. Estimate Methodology
The Catawba and Pee -Dee River Basinwide Assessment Reports prepared by NCDENR were
referenced to provide a general estimate of land use distribution. More detailed
computations were performed using the land coverage provided by North Carolina OneMap.
1.7. TMDL Identification
A portion of the Town of Mooresville MS4 discharges into Upper Rocky River, for which a
TMDL was approved in 2002. The remainder of the Town of Mooresville MS4 discharges to
surface waters that drain to Lake Norman in the Catawba River basin. These surface waters
are not subject to a TMDL.
2. RECEIVING STREAMS
Table 1.
Receiving Stream Name
Stream Segment
Water
Quality
Class.
Use Support
Rating
Water Quality Issues
Yadkin Pee -Dee River Basin
Back Creek
12-108-21-01
C
Dye Branch
13-17-2
C
Impaired
Sediment NP Sources
Rocky River
13-17
C
Impaired
Fecal Sediment and Turbidity
South Fork Withrow Creek
12-108-21-3-2
C
Su ort
West Branch Rocky River
13-17-3
C
Support
Catawba River Basin
Byers Creek
11-89-01 02
C
Support
Davidson Creek
11-106
C
SuRport
McCrary Creek
11-91
C
Support
Reeds Creek
11-104-01 02
C
Support
Wolf Creek
11-105
C
Support
3. EXISTING WATER QUALITY PROGRAMS
3. 1. Local Programs
The following local programs are implemented in the Town of Mooresville.
- Water Supply Watershed Protection — Approximately half of the Town of
Mooresville drains to Lake Norman, a reservoir that serves as a water supply
source in the Catawba Watershed. The Town implements a water supply
protection ordinance for all development within that watershed that meets the
standards presented by NCDENR. The BMPs are required to be designed in
compliance with the NCDENR BMP Design Manual and control 85 percent TSS
removal for the 1-Inch storm event.
- Total Maximum Daily Loads - The other half of the Town of Mooresville drains to
Ov the Yadkin Watershed in an area where a TMDL has been implemented for two
of the receiving streams; Dye Branch and Rocky River. The TMDL states that
additional emphasis shall be placed on controlling the pollutant sources

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associated with storm water runoff. Therefore, the Town of Mooresville
implements BMP design requirements for developments within these sub -basins.
The BMPs are required to be designed to control the stormwater runoff volume
for the 2-year, 24-hour storm event; stormwater runoff rate for the 1-year and
10 year, 24-hour storm events; and 85 percent TSS removal for the 1-inch storm
event.
3. 2. State programs
The following state programs are implemented in the Town of Mooresville.
- Erosion and Sediment Control — The Town of Mooresville relies on the NC_ DENR
program for erosion and sediment control.
' - Local Water Planning Initiative by the Ecological Enhancement Program (formerly
the NC Wetlands Restoration Program). — The Town of Mooresville participates
with the EEP in partnership with other agencies.
' 4. PERMITTING INFORMATION
' 4. 1. Responsible Party Contact List ^
Mr. Ryan Rase, P.E.
Engineering Department Manager
413 North Main Street L
PO Box 878
' Mooresville, NC 28115
704-662-4510 y-
[e-mail]
�M
' 4.2. Organizational Chart Dt
4. 3. Signing official
Mr. Erskine Smith
Assistant Town Manager
413 North Main Street
PO Box 878
Mooresville
North Carolina
28115
704-662-3188
[e-mail]
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4. 4. Duly Authorized Representative
Mr. Erskine Smith
Assistant Town Manager
413 North Main Street
PO Box 878
Mooresville
North Carolina
28115
704-662-3188
ersmith@ci,mooresville.nc.us
S. CO -PERMITTING INFORMATION (if applicable)
5.1. Co-Permittees
The Town of Mooresville is not working with another MS4 to implement the NPDES
program. The following existing individual stormwater permits have been obtained by the
Town of Mooresville for industrial activities.
5.2. Legal Agreements
Not Applicable.
5.3. Responsible Parties
Not Applicable.
6. RELIANCE ON OTHER GOVERNMENT ENTITY
6. 1. Name of Entity
North Carolina Department of Environment and Natural Resources
d Quality Section
Erosion and Sediment Control
6. 2. Measure Implemented
Construction Site Stormwater Runoff Control.
6. 3. Contact Information
North Carolina Department of Environment and Natural Resources
Mooresville Regional Office
610 East Center Avenue
Mooresville NC, 28115
704-662-1699.

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6. 4. Legal Agreements
Not Applicable
7. STORMWATER MANAGEMENT PROGRAM
7.1 PUBLIC EDUCATION AND OUTREACH ON STORM WATER IMPACTS
A. Responsible staff: Ryan Rase, Engineering Department Manager
B. Existing status: Town staff provide some public education and outreach
to the community for storm water related issues on an as -needed basis.
Additional efforts are expected to provide significant benefit. To achieve
maximum benefit, these additional efforts must be focused with regards to the
type of pollutants for which the Town's drainage system is impacted. In
addition, the initial focus should be on the cross-section of the community where
the highest benefit will be achieved first.
C. Objectives for Public Education and Outreach
1. Distribute educational materials to the community.
2. Conduct public outreach activities.
3. Raise public awareness on the causes and impacts of stormwater pollution.
4. Inform the public on steps they can take to reduce or prevent stormwater
pollution.
D. BMPs for Public Education and Outreach
The Town shall implement the following BMPs to meet the objectives of the Public Education and
Outreach Program and shall notify the Division prior to modification of any goals.
BMP
Measurable Goals
YR
YR
YR
YR
YR
1
2
3
4
5
Identify target pollutants
Identify the target pollutant sources the
X
Town's public education program is designed
to address and why they are an issue.
Identify target audiences
Identify the target audiences likely to have
X
significant storm water impacts and why they
were selected.
Informational Web Site
Promote and maintain internet web site.
X
X
X
X
X
Examples include, but are not limited to: Post
newsletter articles on stormwater, information
on water quality, stormwater projects and
activities and ways to contact stormwater

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BMP
Measurable Goals
YR
YR
JYR
YR
YR
1
2
3
4
5
management program staff.
Develop and distribute public
Develop general stormwater educational
X
X
X
X
education materials to
material to appropriate target groups as likely
identified user groups. For
to have a significant stormwater impact.
example, schools,
State -supplied Public Education and Outreach
homeowners, and/or
materials, as available, will be assessed.
businesses.
Teaming team efforts with adjacent
communities will be assessed.
Establish Hotline/Help line
Maintain a stormwater hotline/hel line.
X
X
X
X
X
7.2 PUBLIC INVOLVEMENT AND PARTICIPATION
A. Responsible staff: Ryan Rase, Engineering Department Manager
B. Existing Status: Town staff provide some public education and outreach
for the community for storm water related issues on an as -needed basis.
Additional efforts are expected to provide significant benefit.
C. objectives for Public Involvement and Participation
1. Provide opportunities for the public, including major economic and ethnic
groups, to participate in program development and implementation.
2. Comply with applicable state and local public notice requirements.
D. BMPs for Public Involvement and Participation
The Town shall implement the following BMPs to meet the objectives of the Public Involvement and
Participation Program and shall notify the Division prior to modification of any goals.
BMP
Measurable Goals
YR
YR
YR
YR
YR
1
2
3
4
5
Administer a Public
Develop and implement a Public Involvement
X
X
X
X
X
Involvement Program
and Participation Program as described in the
following sections below
Allow the public an
Conduct at least one public meeting to allow
X
opportunity to review and
the public an opportunity to review and
comment on the Stormwater
comment on the Stormwater Plan.
Plan
Organize a volunteer
Organize and implement a volunteer
X
X
X
X
X
community involvement
stormwater related program designed to
program
promote ongoing citizen participation
including some of the following; sponsoring
and participating in Big Sweep, Adopt a
stream, storm drain stenciling, and poster
contest
Establish a Mechanism for
Established mechanism for public
X
X
X
X
X
Public involvement
involvement, , a citizens' or stakeholders'
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BMP
Measurable Goals
YR
YR
JYR
YR
YR
1
2
3
4
5
group(s) that provide input on stormwater
issues and the stormwater program,
Establish Hotline/Help line
Maintain a stormwater hotline/helpline.
X
X
X
X
X
7.3 ILLICIT DISCHARGE DETECTION AND ELIMINATION (IDDE)
A. Responsible staff: Ryan Rase, Engineering Department Manager
B. Existing Status: Some illicit discharges are detected and eliminated by
Town staff as they perform their standard daily duties. However, authority for
the Town staff to eliminate detected discharges is not in place, so efficient
elimination has not successful. Some areas of the Town may need to be
screened more actively because of a higher potential for illicit discharges.
C. Objectives for Illicit Discharge Detection and Elimination
(a) Detect and eliminate illicit discharges, including preventable spills and
illegal dumping to the Permittee's MS4.
(b) Address significant contributors of pollutants to the MS4. The permittee
may require specific controls for a category of discharges, or prohibit
that discharge completely, if one or more of these categories of sources
are identified as a significant contributor of pollutants to the MS4.
(c) Implement appropriate enforcement procedures and actions.
(d) Develop a map showing the permittee's major MS4 outfalls to state waters
receiving discharges.
(e) Inform employees, businesses, and the general public of hazards
associated with illegal discharges and improper disposal of waste.
' D. BMPs for Illicit Discharge Detection and Elimination
The Town shall implement the following BMPs, to the extent authorized by law, to meet the
objectives of the Illicit Discharge Detection and Elimination Program and shall notify the Division prior
to modification of any goals.
ilsr 3� iBMP yfA �h•: £P �'B
k" Measurable Goals
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YR
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YR, `
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Develop/Implement Illicit
Develop and implement an IDDE Program
X
X
X
X
X
Discharge Detection and
including provisions for program assessment
Elimination IDDE Program
and evaluation.
Establish and maintain
Establish and maintain adequate ordinances
X
X
X
X
X
appropriate legal authorities
or other legal authorities to prohibit illicit
dischar es and enforce the approved IDDE

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p;}�� Measurable Goats` ' ,,, ;
�;YR �
: ,YR'"
YRs,r
;¢ BMP .. ,
�.e,.
1
X`
3
4'
S
Program.
Develop a Storm Sewer
Map identifying major outfalls and stormwater
X
X
X
X
X
System Base Map and
drainage system components. At a minimum,
Inventory of Major Outfalls,
components include major outfalls and
receiving streams. Established procedures to
continue to identify, locate, and update map
of drainage s stem.
Maintain an inventory major
Maintain an inventory major outfalls that
X
X
X
outfalls that discharges to
discharge to waters of the State. For each
waters of the State
major outfall identify the following:
• location,
• reference number,
• size and type of structure,
• apparent condition of structure
• dry -weather Flow, and
• Either the SIC code or a description
which best reflects the principal
products or services provided by each
commercial or industrial facility with
an industrial activity permitted to
discharge storm water to the
permittee's MS4 or those commercial
or industrial facility identified as an
illicit discharge under the IDDE
Program.
For the purposes of this permit, industrial
activities shall mean all permitted industrial
activities as defined in 40 CFR 122.26.
Inspection/detection program
Establish written procedures for detecting and
X
X
X
X
X
to detect dry weather flows at
tracing the sources of illicit discharges and for
MS4 outfalls
removing the sources or reporting the sources
to the State to be properly permitted.
Employee Training
Conduct training for appropriate municipal
X
X
X
X
X
staff on detecting and reporting illicit
discharges.
Provide Public Education
Inform public employees, businesses, and the
X
X
X
X
X
general public of hazards associated with
illegal discharges and improper disposal of
waste.
Establish a public reporting
Establish and publicize reporting mechanism
X
X
X
X
X
mechanism
for the public to report illicit discharges.
Establish citizen request response procedures.
Established procedures to
Establish procedures to identify and report to
X
X
X
X
X
identify and eliminate failed
the County health department failed septic
septic system and sanitary
systems located within the permittee's
sewer overflows.
planning jurisdiction. Establish procedures to
identify and report sanitary sewer overflows
and sewer leaks to the system operator.

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7.4 CONSTRUCTION SITE RUNOFF CONTROLS
A. Responsible staff: Ryan Rase, Engineering Department Manager
B. Existing Status: The Town of Mooresville relies on the NCDENR program for
erosion and sediment control plan review, inspection, compliance, enforcement, etc. The
Town believes that the existing NCDENR program is adequately addressing the potential
for pollution from construction -related erosion and sediment control and believe
continuing to rely on the NCDENR program is appropriate.
C. Objectives for Construction Site Runoff Controls
(a) Reduce pollutants in stormwater runoff from construction activities disturbing
one or more acres of land surface and those activities less than one acre that are
part of a larger common plan of development.
(b) Provide procedures for public input, sanctions to ensure compliance,
requirements for construction site operators to implement appropriate erosion
and sediment control practices, review of site plans which incorporates
consideration of potential water quality impacts, and procedures for site
inspection and enforcement of control measures.
D. BMPs for Construction Site Runoff Controls
The Town shall implement the following BMPs to meet the objectives of the Construction Site Runoff
Controls and shall notify the Division prior to modification of any goals.
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Implement a program and
Develop a regulatory mechanism and
X
X
X
X
X
establish a regulatory
implement a program requiring erosion and
mechanism for erosion and
sediment controls at construction sites and
sediment control.
providing for sanction to ensure compliance.
Instead of originating a new program, the
Town will elect to comply by relying on the
NCDENR Division of Land Resources
r ontrol Program.
Develop requirements on
Require construction site operators to
X
X
X
X
X
construction site operators
implement erosion and sediment control BMPs
and to control construction site wastes that
may cause adverse water quality impacts.
Provide education and
New materials may be developed by the Town,
X
X
X
X
X
training materials for
or the Town may use materials adopted from
construction site operators
other program and adapted to the Town's
construction runoff controls program.
Institute plan reviews
Review construction plans and establish
X
X
X
X
procedures that incorporate water quality
considerations in construction site plan
reviews.
Establish public information
Establish procedures for receipt and
X
X
X
X
X
procedures
consideration of erosion and sedimentation

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information submitted by the public. Publicize
the procedures and contact information. The
procedures must lead directly to a site
inspection or other timely follow-up action.
Establish inspection and
Establish procedures for site inspection and
X
X
X
X
X
enforcement procedures
enforcement of control measure requirement.
The procedures should include prioritizing
areas of inspections based on local criteria.
7.5 POST -CONSTRUCTION SITE RUNOFF CONTROLS
A. Responsible staff: Ryan Rase, Engineering Department Manager
B. Existing Status: The current storm water policies and regulations fin the Town of
Mooresville require BMPs that treat the one inch storm event for 85 percent TSS removal
and additional volume and peak control. These policies and regulations may need some
refinement to provide a similar level of protection as required by NCDENR for post -
construction.
C. Objectives for Post -Construction Site Runoff Controls in New
Development and redevelopment
(a) Manage stormwater runoff from new development / redevelopment that drains
to the MS4 and disturbs an acre or more of land surface, including projects less
than an acre that are part of a larger common plan of development or sale.
(b) Provide a mechanism to require long-term operation and maintenance of BMPs.
(c) Ensure controls are in place to minimize water quality impacts.
D. BMPs for Post -Construction Site Runoff Controls
' The permittee shall implement the following BMPs to meet the objectives of the Post -
Construction Stormwater Management Program.
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Post -Construction Stormwater
Develop and adopt by ordinance (or similar
X
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Management Program
regulatory mechanism) a program to address
stormwater runoff from new development and
redevelopment/rfm,Rlement and enforce the
program with! 36 m nths of the permit issue
date.
Strategies which include
Developed strategies that include a
X
X
X
X
BMPs appropriate for the MS4
combination of structural and/or non-
structural BMPs implemented in concurrence
with a above. Provide a mechanism to

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require long-term operation and maintenance
of structural BMPs. Require annual inspection
reports of permitted structural BMPs
erformed by a qua6fied professional.
Establish a program under
Coordinate with County health department to
X
X
X
X
the post -construction
control the known sources of fecal coliform to
minimum measure to control
the maximum extent practicable. Implement
the sources of fecal coli form
within 24 months of the permit issue date.
to the maximum extent
practicable.
Deed Restrictions and
Impose or require recorded deed restrictions
X
X
X
X
Protective Covenants
and protective covenants that ensure
development activities will maintain the
project consistent with approved plans.
Operation and Maintenance
Implement or require an operation and
X
X
X
X
Plan
maintenance plan that ensures the adequate
long-term operation of the structural BMPs
required by the program. The operation and
maintenance plan must require the owner of
each structural BMP to submit a maintenance
inspection report on each structural BMP
annually to the local program.
Setbacks for Built -upon Areas
Require built -upon areas to be located at least
X
X
X
X
30 feet landward of all perennial and
intermittent surface waters except as
provided for in the Permittee's approved Post -
Construction Stormwater Ordinance, For
purposes of this section, a surface water shall
be present if the feature is shown on either
the most recent version of the soil survey
map prepared by the Natural Resources
Conservation Service of the United States
Department of Agriculture or the most recent
version of the 1:24,000 scale (7.5 minute)
quadrangle topographic maps prepared by the
United States Geologic Survey (USGS). Relief
from this requirement may be allowed when
surface waters are not present in accordance
with the provisions of ISA NCAC 02B
.0233(3)(a).
Educational materials and
Provide educational materials and training for
X
X
X.
X
training for developers
developers. New materials may be developed
by the permittee, or the permittee may use
materials adopted from other programs and
adapted to the permittee's new development
and recleyejlo ment program,
Establish nutrient sensitive
Develop, adopt, and implement an ordinance
X
X
X
waters (NSW) protection
(or s ' imilar regulatory mechanism) to ensure
measures (for programs with
that the best management practices reduce
development or
nutrient loading to the maximum extent

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redevelopment draining to
practicable. Develop and include a nutrient
NSW waters)
application management program for both
inorganic fertilizer and organic nutrients to
reduce nutrient loading entering waters of the
State.
E. The evaluation of Post -construction Stormwater Management Program
measures
(a) For post -construction requirements, a program will be deemed compliant for the
areas where it is implementing any of the following programs:
(1) Water Supply Watershed I (WS-I) — 15A NCAC 2B.0212.
(2) Water Supply Watershed II (WS-II) — 15A NCAC 2B.0214.
(3) Water Supply Watershed III (WS-III) — 15A NCAC 2B.0215.
(4) Water Supply Watershed IV (WS-IV) — 1SA NCAC 2B.0216.
(5) Freshwater High Quality Waters (HQW) — 15A NCAC 2H.1006.
(6) Freshwater Outstanding Resource Waters (ORW) — 15A NCAC 2H.1007.
(7) The Neuse River Basin Nutrient Sensitive Waters (NSW) Management
Strategy -- 15A NCAC 2B.0235.
(8) The Tar -Pamlico River Basin Nutrient Sensitive (NSW) Management
Strategy — 15A NCAC 28.0258.
(9) The Randleman Lake Water Supply Watershed Nutrient Management
Strategy — 15A NCAC 2B.0251.
(b) Model Practices. For those projects that are not subject to the post -construction
stormwater management provisions of another existing state stormwater
management program, the permittee's Post -construction Stormwater
Management Program must equal or exceed the stormwater management and
water quality protection provided by the following model practices.
(i) The permittee may issue a local stormwater management permit to a
development or redevelopment project as either a low -density project or a high
density project.
(ii) A project may be permitted as a low -density project if it meets the following
criteria:
(A) No more than two dwelling units per acre or 24% built -upon area;
(B) Use of vegetated conveyances to the maximum extent practicable;
(C) All built -upon areas are at least 30 feet landward of perennial and
intermittent surface waters; and,
(D) Deed restrictions, protective covenants, other restrictive language, or
other protective measures as required by the locally issued permit and
incorporated by the development to ensure that subsequent
development activities maintain the development (or redevelopment)
consistent with the approved plans.

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(E) A project with an overall density at or below the low -density
thresholds, but containing areas with a density greater than the overall
project density, may be considered low density as long as the project
meets or exceeds the post -construction model practices for low -density
projects and locates the higher density in upland areas and away from
surface waters and drainageways to the maximum extent practicable.
(iii) A project not consistent with the requirements for a low density project may be
permitted as a high density project if it meets the following requirements:
(A) High -density projects must use structural stormwater management
systems that will control and treat runoff from the first one -inch of rain.
(B) Runoff volume drawdown time must be a minimum of 48 hours, but not
more than 120 hours;
(C) High -density projects must discharge the storage volume at a rate equal
to or less than the predevelopment discharge rate for the one-year,
24-hour storm.
(D) All structural stormwater treatment systems must be designed to achieve
856/o average annual removal of total suspended solids;
(D) For BMPs that require a separation from the seasonal high-water table,
the separation shall be provided by at least 12 inches of naturally
occurring soil above the seasonal high-water table.
(E) Stormwater management measures must comply with the General
Engineering Design Criteria For All Projects requirements listed in 15A
NCAC 2H .1008(c) or a locally approved stormwater management
manual;
(F) All built -upon areas are at least 30 feet landward of perennial and
intermittent surface waters; and
(G) Deed restrictions, protective covenants, other restrictive language, or
other protective measures as required by the locally issued permit and
incorporated by the development to ensure that subsequent
development activities maintain the development (or redevelopment)
consistent with the approved plans.
(c) Watershed Protection Plans. Public bodies may develop and implement comprehensive
watershed protection plans that may be used to meet part, or all, of the requirements for
post -construction stormwater management.
1. A regulated entity may develop its own comprehensive watershed plan, may use the
model ordinance developed by the Commission, may design its own post -construction
practices based on the Division's guidance and engineering standards for best
management practices, or it may incorporate the post -construction model practices to
satisfy, in whole or in part, the requirements for post -construction stormwater
management.

2. For new development and redevelopment projects to be built within the permittee's
planning jurisdiction by entities with eminent domain authority, the permittee shall, to
the maximum extent practicable, coordinate the approval of the post -construction site
runoff control with the Division of Water Quality of DENR.
a7.6 POLLUTION PREVENTION AND GOOD HOUSEKEEPING FOR MUNICIPAL OPERATIONS
A. Responsible staff: Ryan Rase, Engineering Department Manager
OB. Existing Status:
C. Objective for Pollution Prevention and Good Housekeeping for
Municipal Operations
Prevent or reduce stormwater pollution from municipal operations.
1 D. BMPs for the Pollution Prevention and Good Housekeeping for
Municipal Operations
' The Town shall implement the following BMPs to meet the objectives of the Pollution Prevention and
Good Housekeeping Program and shall notify the Division prior to modification of any goals.
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Measurable Goals
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Develop an operation and
Develop an operation and maintenance
X
X
X
X
X
maintenance program
program for structural stormwater BMPs ,
storm sewer system maintenance which may
include street sweeping and municipal
operations such as recycling and household
hazardous waste and oil collection.
Develop Site Pollution
Develop and implement Site Pollution
X
X
X
X
X
Prevention Plan for Municipal
Prevention Plan for Municipal Facilities owned
Facilities
and operated by the permittee with the
potential for generating polluted stormwater
runoff that has the ultimate goal of
preventingor reducing pollutant runoff.
Inspection and evaluation of
Maintain an inventory of facilities and
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X
X
X
X
facilities, operations, and the
operations owned and operated by the
MS4 system and associated
permittee with the potential for generating
structural BMPs.
polluted stormwater runoff, including the MS4
system and associated structural BMPs.
Conduct inspections at facilities and
operations owned and operated by the
permittee for potential sources of polluted
runoff, the stormwater controls, and
conveyance systems. Evaluate the sources,
document deficiencies, plan corrective
actions, implement appropriate controls, and
document the accomplishment of corrective
actions.
Conduct staff training
Conduct staff training specific for pollution
X
X
X
X
X
prevention and good housekeeping

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procedures.
Review of municipality owned
Conduct annual review of the industrial
X
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X
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X
or operated regulated
activities with a Phase I NPDES stormwater
industrial activities
permit owned and operated by the permittee.
Review the following aspects: the Stormwater
Pollution Prevention Plan where one is
required, the timeliness of any monitoring
reports required by the Phase I permit, and
the results of inspections and subsequent
follow-up actions at the facilities.
Spill Response Procedures
Establish spill response procedures for
X
X
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X
X
municipal operations owned and operated by
the permittee with the potential to generate
polluted stormwater runoff.
Prevent or Minimize
Describe measures that prevent or minimize
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X
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X
X
Contamination of Stormwater
contamination of the stormwater runoff from
Runoff from all areas used for
all areas used for vehicle and equipment
Vehicle and Equipment
cleaning. Perform all cleaning operations
Cleaning
indoors, cover the cleaning operations, ensure
washwater drain to the sanitary sewer
system, collect stormwater runoff from the
cleaning area and providing treatment or
recycling, or other equivalent measures. If
sanitary sewer is not available to the facility
and cleaning operations take place outdoors,
the cleaning operations shall take place on
grassed or graveled areas to prevent point
source discharges of the washwater into the
storm drains or surface waters.
Where cleaning operations cannot be
performed as described above and when
operations are performed in the vicinity of a
storm drainage collection system, the drain is
to be covered with a portable drain cover
during clean activities. Any excess ponded
water shall be removed and properly handled
prior to removing the drain cover.
The point source discharge of vehicle and
equipment wash waters, including tank
cleaning operations, are not authorized by
this permit and must be covered under a
separate NPDES permit or discharged to a
sanitary sewer in accordance with applicable
industrial pretreatment requirements.