SW3160405_CURRENT PERMIT_20160502

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE
WCURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION. INSPECTION
DOC DATE
Z/
YYYYMMDD
I

Environmental
Quality
May 2, 2016
Mr. Jason Teller, Managing Partner
Waxhaw Mill Ventures, LLC
6225 Carmel Road
Charlotte, North Carolina 28226
Subject: Stormwater Permit No. SW3160405
Cotton Flats in Union County
Dear Mr. Teller:
PAT McCRORY
Governor
DONALD R. VAN DER VAART
Secretary
1%L�'"
L
%L- J E-
1,4AY 4 2016
Lct' J}calii:,t Section
1,!rore". Office
The Division of Energy, Mineral, and Land Resources (DELMR), received a complete Stormwater
Management Permit Application for the subject project on April 25, 2016. Staff review of the plans
and specifications has determined that the project, as proposed, will comply with the Stormwater
Regulations set forth in Title 15A NCAC 21-1.1000 and Session Law 2006-246. We are forwarding
Permit No. SW3160405, dated May 2, 2016, for the construction, operation and maintenance of the
subject project and sand filter. This permit shall be effective from the date of issuance until May 1,
2024, and shall be subject to the conditions and limitations as specified therein, and does not
supersede any other agency permit that may be required.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing by filing a written petition with the Office of Administrative
Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina General
Statutes. Per NCGS 143-215(e) the petition must be filed with the OAH within thirty (30) days of
receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a
filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh,
NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com.
Unless such demands are made this permit shall be final and binding.
This project will be kept on file at the Mooresville Regional Office. If you have any questions, or
need additional information concerning this matter, please contact Mike Randall at (919) 807-
6374; or [e-mail].
Sincerely,
> ?X�q
for Tracy E. Davis, PE, CPM, Director
cc: SW3160405 File, Mooresville Regional Office
Nothing Compares
State of North Carolina I Environmental Quality
217 West Jones Street 1 1601 Mail Service Center I Raleigh, North Carolina 27699-1601
919 707 8600

State Stormwater Permit
Permit No. SW3160405
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Waxhaw Mill Ventures, LLC
Cotton Flats in Union County
403 East South Main Street, Waxhaw
FOR THE
MAY d 2016
DE..-L'Zt',
construction, operation and maintenance of one sand filter in compliance with the
provisions of Session Law 2006-246 and 15A NCAC 2H .1000 (hereafter referred to as
the "stormwater rules') and the approved stormwater management plans and
specifications and other supporting data as attached and on file with and approved by
the State and considered a part of this permit.
This permit shall be effective from the date of issuance until May 1, 2024, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. The sand filter is approved for the management of stormwater runoff as
described in the application documents and as shown on the approved plans.
3. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
4. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
The built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent surface waters.
Page 1 of 4

State Stormwater Permit
Permit No. SW3160405
It. SCHEDULE OF COMPLIANCE
During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
2. The permittee shall at all time provide the operation and maintenance necessary
to assure the permitted sand filter functions at optimum efficiency. The approved
Operation and Maintenance Plan must be followed in its entirety and
maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and re -vegetation of slopes and the filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans.
f. Debris removal and unclogging of all drainage structures, level spreader,
filter media, planting media, underdrains, catch basins and piping.
g. Access to the cell and outlet structure must be available at all times.
3. Records of maintenance activities must be kept for each permitted BMP. The
reports will indicate the date, activity, name of person performing the work and
what actions were taken.
4. The permittee shall submit an annual summary report of the maintenance and
inspection records for the sand filter. The report shall summarize the inspection
dates, results of the inspections, and the maintenance work performed at each
inspection.
5. The sand filter shall be constructed in accordance with the approved plans and
specifications, the conditions of this permit, and with other supporting data.
6. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the sand filter certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
7. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
8. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
Page 2 of 4

State Stormwater Permit
Permit No. SW3160405
A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of eight years from the date of the completion of
construction.
10. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a completed Name/Ownership Change form signed by both parties, to the
State, accompanied by the supporting documentation. The approval of this
request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves a request to transfer the permit.
Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the State, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
6. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
Page 3 of 4

State Stormwater Permit
Permit No. SW3160405
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Session Law 2006-
246, Title 15A NCAC 21-1.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
12. The permittee shall submit a renewal request with all required forms and
documentation at least 180 days prior to the expiration date of this permit.
Permit issued this the 2nd day of May, 2016.
Director Division of Energy, Mineral, and Land Resources
Page 4 of 4

State Stormwater Permit
Permit No. SW3160405
Waxhaw Mill Ventures, LLC
Cotton Flats
403 East South Main Street, Waxhaw
Union County
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
(Project Name)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
cc: NCDENR-DEMLR Regional Office
Page 1 of 1

State Stormwater Permit
Permit No. SW3160405
Waxhaw Mill Ventures, LLC
Cotton Flats
403 East South Main Street, Waxhaw
Union County
Designer's Certification
Marc A. Houle , as a duly registered Professional Engineer in the
State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
Flats
(Project Name)
for Waxhaw Mille Ventures, LLC (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within sµpstar Rl
compliance and intent of the approved plans and specifications. ,,R�FI�CARO('01
�FESSto'...I t--
Noted deviations from approved plans and specification: ` SEA( 7�
's 14906 ,
Sign
Regi:
Date
cc: NCDENR-DEMLR Regional Office
j
SEAL
Page 1 of 1

Permit Number:
prmided by DWQ)
Drainage Area Number:
Sand Filter Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known
set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced
immediately. These deficiencies can affect the integrity of structures, safety of the public, and the
removal efficiency of the BMP.
Important maintenance procedures:
- The drainage area will be carefully managed to reduce the sediment load to the sand filter.
- The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds
six inches.
- Once a year, sand media will be skimmed.
- The sand filter media will be replaced whenever it fails to function properly after maintenance.
The sand filter will he inspected quarterly and within 24 hours after every storm event greater than
1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in
a known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired
immediately.
BMP element:`.: Potential p;oblem , `How I will remediate the,problem
Entire BMP
Trash/debris is present.
Remove the trash/debris.
Adjacent pavement (if
Sediment is present on the
Sweep or vacuum the sediment as soon
applicable)
pavement surface.
as possible.
Perimeter of sand filter
Areas of bare soil and/or erosive
Regrade the soil if necessary to remove
gullies have formed.
the gully, and then plant a ground cover
and water until it is established. Provide
lime and a one-time fertilizer application.
Vegetation is too short or too long.
Maintain vegetation at an appropriate
height.
Flow diversion structure
The structure is clogged.
Unclog the conveyance and dispose of
any sediment offsite.
The structure is damaged.
Make any necessary repairs or replace if
damage is too large for repair.
Forebay or pretreatment area
Sediment has accumulated to a
Search for the source of the sediment and
depth of greater than six inches.
remedy the problem if possible. Remove
the sediment and stabilize or dispose of it
in a location where it will not cause
impacts to streams or the BMP.
Erosion has occurred.
Provide additional erosion protection
such as reinforced turf matting or riprap
if needed to prevent future erosion
problems.
Form S W401-Sand Filter O&M-Rev.4 2009Septl7 Page 1 of 3

Permit Number:
(to be provided by DWQ)
Area Number:
Weeds are present. Remove the weeds, preferably by hand.
If a pesticide is used, wipe it on the plants
rather than spraying.
BMP element: -
Potential problem:,
sti
How I will remediate the prorblem `
Filter bed and underdrain
Water is ponding on the surface
Check to see if the collector system is
collection system
for more than 24 hours after a
clogged and flush if necessary. If water
storm.
still ponds, remove the top few inches of
filter bed media and replace. If water still
ponds, then consult an expert.
Outlet device
Clogging has occurred.
Clean out the outlet device. Dispose of
the sediment offsite.
The outlet device is damaged
Repair or replace the outlet device.
Receiving water
Erosion or other signs of damage
Contact the NC Division of Water Quality
have occurred at the outlet.
401 Oversight Unit at 919-733-1786.
Form S W401-Sand Filter O&M-Rev.4 2009Sept17 Page 2 of 3

Permit Number:
(Io be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the performance of the
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior
to any changes to the system or responsible party.
Project name: Cotton Flats
BMP drainage area number:
Print name: Jason Teller
Title: Managing Partner
Address: 6225 Carmel Rd Charlotte, NC 28226
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been
sold and a resident of the subdivision has been named the president.
1, Laae MOB , a Notary Public for the State of
Nor41n_ Caubia , County of do hereby certify that
�ASoti pJ personally appeared before me this I day of
I�Qt'iL 6LOJU , and acknowledge the due execution of the forgoing sand filter
maintenance requirements. Witness my hand and official seal,
LAJOHNA WATKINS
NoterY Public
Union Co., North Carolina —
My CornmisNon Expires Jan. 8, 1011
SEAL
My commission expiresU(r
33

Permit Number:
(to be Provided by DWQ)
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
SAND FILTER SUPPLEMENT
This form must be filled out on line, printed and submitted with all of the required information.
Make sure to also fill out and submit the Required Items Checklist (Section III) and the 18M Agreement (Section IV).
I.4PRO'JECTONFORMATIONa
Project name COTTON FLATS
Contact name
Phone number
Date
Drainage area number
Vince Keene
704-556-1990
April 19, 2016
1
Site Characteristics
Drainage area (AD)
6.88 ft2
Impervious area
5.09 ft'
% Impervious (IA)
74.0% %
Design rainfall depth (Ro)
2.94 in
Peak Flow Calculations
1 -yr, 24-hr runoff depth
2.94 in
1-yr, 24-hr intensity
1.10 Whir
Pre -development 1-yr, 24-hr runoff
9.30 ft'/sec
Post -development 1 -yr, 24-hr runoff
14.92 ft'/sec
Pre/Post 1-yr, 24-hr peak control
5.62 ft'/sec
Storage Volume
Design volume (WOV)
17,878.00 ft'
Adjusted water quality volume (WOVAej)
13,408.50 ft3
Volume contained in the sedimentation basin and on top of the sand filter
17,878.00 ft'
Top of sand filter/grate elevation
649 1t amsl
Weir elevation (between chambers)
651 ft amsl
Maximum head on the sedimentation basin and sand filter (hN„r;I,)
4.59 ft
Average head on the sedimentation basin and sand filter (hA)
2.30 ft
Runoff Coefficient (Rv)
0.72 (unitless)
Type of Sand Filter
Open sand filter?
Y Y or N
SHWT elevation
ft amsl
Bottom of the sand filter elevation
647.00 It amsl
Clearance (dsKwT)
Closed/pre-cast sand filter?
N Y or N
SHWT elevation
ft amsl
Bottom of the sand filter elevation
645.00 ft amsl
Clearance (ds,,wr)
If this is a closed, underground closed sand filter: The clearance between
the surface of the sand filter and the bottom of the roof of the underground
It
structure (ds.)
OK
OK
OK
Ensure that the average is half of the max.
Form SW401-Sand Filter-Rev.S 2009Sept17 Parts I and II. Project Design Summary, Page 1 of 2

Permit Number:
(to be provided by DWQ)
Si6finentatlon Basin
Surface area of sedimentation basin (As)
Sedimentation basin/chamber depth
Sand Filter
Surface area of sand filter (AF)
Top of sand media filter bed elevation
Bottom of sand media filter bed/drain elevation
Depth of the sand media filter bed (dF)
Coefficient of permeability for the sand filter (k)
Outlet diameter
Outlet discharge/flowrate
Time to drain the sand filter (t)
Time to drain the sand filter (t)
Additional Information
Does volume in excess of the design volume bypass the sand filter?
Is an off-line Flow -splitting device used?
If draining to SA waters: Does volume in excess of the design volume flow
evenly distributed through a vegetated filter?
What is the length of the vegetated filter?
Does the design use a level spreader to evenly distribute flow?
Is the BMP located at least 30ft from surface waters (50ft if SA waters)?
If not a closed bottom, is BMP located at least 10011from water supply wells?
Are the vegetated side slopes equal to or less than 3:1
Is the BMP located in a recorded drainage easement with a recorded access
easement to a public Right of Way (ROW)?
What is the width of the sedimentation chamberlforebay (Wsd)?
What is the depth of sand over the outlet pipe (dpipe)?
2,590.00 11:2
VM. meow imimnuw, uuuuay nccu w ue Iaieabeu w
1.00 ft
1,540.00
ft'
vn. rvicma nmuiuuwu, uuuuay uccu w ue muadaeu w
649.00 ft amsl
647.00 ft amsl
2.00 ft
3.50 (ft/day)
6.00 in
0.20 ft3/sec
40.00 hours
OK. Submit drainage calculations.
1.67 days
Y
Y or N
OK
N
YorN
Insufficient flow splitter.
YorN
ft
N
YorN
Show how flow is evenly distributed.
N
Y or N
BMP must be sufficient distance from surface waters.
Y
YorN
OK
Y
YorN
OK
Y
YorN
OK
48.00 ft
OK
1.50 ft
OK
Form SW401-Sand Filter-Rev.5 2009Sept17 Parts I and II. Project Design Summary, Page 2 of 2