SW3151103_CURRENT PERMIT_20151124

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. SW ��✓ 1��3
DOC TYPE CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATEyl S /Qq
YYYYM M DD

Environmental
Quality
November 24, 2015
Mr. Donald E. Duncan, Jr., City Manager
City of Conover
101 1 st Street East
Conover, North Carolina 28613
Subject: Stormwater Permit No. SW3151103
NC Data Campus Phase B, Catawba County
Dear Mr. Duncan:
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secretary
1?k'/1 C/^�
cFwF®
oEN ? 241S
Mp � b7�QRR o a� �n
ice
The Division�of Energy, Mineral, and Land Resources (DELMR), received a complete Stormwater
Management'Permit Application for the subject project on November 18, 2015. 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 2H.1017. We are forwarding Permit No. SW3151103, dated
November 24, 2015, for the construction, operation and maintenance of the subject project and the
stormwater system. This permit shall be effective from the date of issuance until November 23, 2023, or
until rescinded and shall be subject to the conditions and limitations as specified therein, and does not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
par (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes. Per
f 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 919431-3000, 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 [phone]; or
[e-mail].
Sincerely,
t.
for Tracy E. Davis, PE, CPM, Director
cc: SW3151103 File, Mooresville Regional Office
cc: Scott Millar, President, Catawba County Property Development Corporation
Kyle M. Seaman, P.E., McGill Associates
Nothing Compares
State of North Carolina I Environmental Quality
1601 Mail Service Center I Raleigh, North Carolina 27699-1601
919707-8600
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State Stormwater Permit
Permit No. SW3151103
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
STATE STORMWATER MANAGEMENT PERMIT o o
In accordance with the provisions of Article 21 of Chapter 143, General S%tof
North Carolina as amended, and other applicable Laws, Rules, and ReguI240 ;y `o
s
PERMISSION IS HEREBY GRANTED TO'd� g�
City of Conover "m
NC Data Campus Phase B in Catawba County
FOR THE
construction, operation and maintenance of two wet detention ponds in compliance with
the provisions of 5A NCAC 2H .1017 (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 November 23, 2023, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. The two wet detention ponds are 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.
5. The built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent surface waters.
If. SCHEDULE OF COMPLIANCE
During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
Page 1 of 4

State Stormwater Permit
Permit No. SW3151103
2. The permittee shall at all time provide the operation and maintenance necessary
to assure the two permitted wet detention ponds 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.
P
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 the for two wet detention ponds. The report shall summarize
the inspection dates, results of the inspections, and the maintenance work
performed at each inspection.
5. The two wet detention ponds 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 two wet detention ponds 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. SW3151103
9. 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.
3. 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.
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.
Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
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 2H.1000, and NCGS 143-215.1 et.al.
Page 3 of 4

State Stormwater Permit
Permit No. SW3151103
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 24m day of November, 2015.
Director Division of Energy, Mineral, and Land Resources
Page 4 of 4

State Stormwater Permit
Permit No. SW3151103
City of Conover
NC Data Campus Phase B in Catawba Countv
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

Permit No.
(to be provided by DWQ)
�*' shy
NCDENR LVy
STORMWATER MANAGEMENT PERMIT APPLICATJ
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMI
This form must be filled out, printed and submitted.
The Required Items Checklist (Part fit) must be printed, filled out and submitted along with
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4
required information.
li PROJECT, INFORMATION
Project name NC Data Campus Phase B
Contact person Kyle Seaman, PE
Phone number 828-252-0575
Dale 11/16/2015
Drainage area number 1 -
II: DESIGN INF.ORMATION',
Site Characteristics
Drainage area
886,827 ft2
Impervious area, post -development
550,164 ft2
%impervious
62.04 %
Design rainfall depth
1,0 in
Storage Volume: Non -SA Waters -
Minimum volume required
44,957 ft3
Volume provided
139,352 ft3
Storage Volume: SA Waters
1.5' runoff volume
to
Pre -development 1-yr, 24-hr runoff
ft3
Post -development 1-yr, 24-hr runoff
It
Minimum volume required
ft3
Volume provided
ft3
Peak Flow Calculations
Is the prelpost control of the 1yr 24hr storm peak flow required?
N (Y or N)
1-yr, 24-hr rainfall depth
NA in
Rational C, pre -development
69.00 limitless)
Rational C, post -development
87.00 (unitless)
Rainfall intensity: 1-yr, 24-hr storm
Inlhr
Pre -development l-yr, 24-hr peak flow
ft3lsec
Post -development 1-yr, 24-hr peak flow
r sec
PrelPost 1-yr, 24-hr peak flow control
ft3lsec
Elevations
Temporary pool elevation
877.00 fmsl
Permanent pool elevation
873.50 fmsl
SHWT elevation (approx. at the perm. pool elevation)
fmsl
Top of 1 Oft vegetated shelf elevation
874.00 fmsl
Bottom of 1Oft vegetated shelf elevation
873.00 fmsl
Sediment cleanout, top elevation (bottom of pond)
869.50 ill
Sediment cleanoul, bottom elevation
668.50 fmsl
Sediment storage provided
1.00 It
Is there additional volume stored above the stale -required temp. pool?
Y (Y or N)
Elevation of the top of the additional volume
877.0,fmsl
OK, volume provided is equal to or in excess of volume required.
OK
CARO�i�
i
IPa SEAL r;
042470
FrVCINS' �.- e�
Form SW401-Wet Detention Basin-Rev.94118112
0
Parts I. & II. Design Summary, Page 1 of 2

,r

.1;
Permit No.
(to be provided by DWO)
II. DESIGN INFORMATION
Surface Areas
Area, temporary pool
45,659 ft'
Area REQUIRED, permanent pool
28,378 f 2
SAIDA ratio
3.20 (unitless)
Area PROVIDED, permanent pool, Apa.,p_pp
31,040 tt`
OK
Area, bottom of 10ft vegetated shelf, Aya w
21,227 Ill'
Area, sediment cleanout, top elevation (bottom of pond), Abpod
15,457 ft`
Volumes
Volume, temporary pool
139,352 rya
OK
Volume, permanent pool, Vp -PW
62,129 111
Volume, forebay (sum of forebays if more than one forebay)
11,267 tt3
Forebay % of permanent pool volume
18.1% %
OK
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
N (Y or N)
Mountain/Piedmont SAIDA Table Used?
Y (Y or N)
SAIDA ratio
3.20 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
N (Y or N)
Volume, permanent pool, Vp,,,,, pop
62,129 8'
Area provided, permanent pool, Ape„n pW
31,040 ft`
Average depth calculated
it
Need 3 It min.
Average depth used in SAIDA, dr, (Round to nearest 0.511)
It
Calculation option 2 used? (See Figure 10-21b)
Y (Y or N)
Area provided, permanent pool, A._pm
31,040 tt`
Area, bottom of 10ft vegetated shelf, A. vo,
21,227 tt`
Area, sediment cleanout, top elevation (bottom of pond), A,_p,
15,457 ff'
'Depth' (distance blw bottom of 10f1 shelf and top of sediment)
3.50 It
Average depth calculated
3.45 R
OK
Average depth used in SAIDA, it., (Round to down to nearest 0.51t)
3.5 ft
OK
Drawdown Calculations
Drawdown through orl
Diameter of orifice (if circular)
Area of orifice (if -non -circular)
Coefficient of discharge (Cu)
Driving head (He)
Drawdown through weiO
Weir type
Coefficient of discharge IQ
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpalh to width ratio
Length to width ratio
Trash rack for overflow & orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies is:
Y (Y or N)
4.00 in
in
0.60 (unitless)
0.12 ft
(Y or N)
(unitless)
_(unitless)
it
tt
ft'/sec
ft'/sec
Wised
days
3:1
OK
10 :1
OK
10.0 ft
OK
3:1
OK
3.3 :1
OK
N (Y or N)
Trash rack or similar device recommended.
2.5 It
OK
N (Y or N)
OK
Y (Y or N)
OK
Y (Y or N)
OK
12"Inlet wl Trash Rack, Inc.
869.50
Fomi SW401-Wet Detention Basin-Rev.94/1IV12
Parts I. & 11. Design Summary, Page 2 of 2

.f
Permit No.
(to be provided by DWQ)
III. REQUIRED ITEMS CHECKLIST.
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials
Sheet No.
,
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High Flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
nt
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2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip.
3. Section view of the wet detention basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
S G 1
on the plans prior to use as a wet detention basin.
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5. A table of elevations, areas, incremental volumes &accumulated volumes for overall pond and for forebay,
to verify volume provided.
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C'1�
6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
7. The supporting calculations.
`M-Al1v
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
\4Mc-
{tt C "60
9. A copy of the deed restrictions (if required).
SEL-t,
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.9-4118112
Part III. Required Items Checklist, Page 1 of 1

Permit No.
(m be "vided by OWO)
NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORD �G VP t
401 CERTIFICATION APPLICATION FORM -P ya
WET DETENTION BASIN SUPPLEMENT o rn s Q
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the information.
c+
I:`„ P,ROJECTtINFORMATIONim > ""_:�.• _ i1i` .. :'_�!„ e • i 1"-•- rr r -'—s
Project name NC Data Campus Phase B
Contact person Kyle Seaman, PE
Phone number 828-252-0575
Date 1111612015
Drainage area number 1
IL\ DESIGN`INEORMATION,., ..•�, .i, v — ± ��""-` '` -� ,`".. 1" `I' a_ I ?- °v
Site Characteristics
Drainage area - 886,827 re'
Impervious area, post -development 550,164 ft2
%impervious 62.04 %
Design rainfall depth 1.0 in
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SAWaters
1.5• runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the prelpost control of the 1 yr 24hr stone peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1-yr, 24-hr storm
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
PrelPost 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 1011 vegetated shelf elevation
Bottom of 1 Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment dearlout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state -required temp. pool?
Elevation of the top of the additional volume
44,957 ft3
139,352 ft3
ft3
re3
ft3
ft3
ft3
N (Y or N)
NA in
69.00 (unifless)
87.00 (unifless)
in/hr
ft3lsec
ft3lsec
ft3/sec
877.00 fmsl
873.50 fmsl
fmsl
874.00 fmsl
873.00 fmsl
669.60 fmsl
868.50 fmsl
1.00 it
OK, volume provided is equal to or in excess of volume required.
Y (Y or N)
877.0 fmsl OK
\A C A R 111 L)
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042470
i! '•FNGINEE�'���
'CHAE1.9�P��•
Form SW401-Wet Detention Basin-Rev.9-411&12 Parts I. 811. Design Summary, Page 1 of 2

Permit No.
•� (to be (rovdeC by DWO)
115 DESIGN 'INFORMATIONE.-
Surface Areas
Area, temporary pool
Area REQUIRED, permanent pool
SAIDA ratio
Area PROVIDED, permanent pool, A._,,
Area, bottom of 1011 vegetated shelf, AcoLm
Area, sediment cleanout, top elevation (bottom of pond), Abol_p a
Volumes
Volume, temporary pool
Volume, permanent pool, VPMAJ�
Volume, forebay (sum of forebays if more than one forebay)
Forebay %of permanent pool volume
SAIDA Table Data
Design TSS removal
Coastal SAIDA Table Used?
MountairVPiedmont SAIDA Table Used?
SAIDA ratio
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
Volume, permanent pool, Vp _P,
Area provided, permanent pool, Ar _,,
Average depth calculated
Average depth used in SAIDA, ds., (Round to nearest 0.5ft)
Calculation option 2 used? (See Figure 10-2b)
Area provided, permanent pool, A._,,
Area, bottom of 10ft vegetated shelf,
45,659 It
28,378 R'
3.20 limitless)
31,040 ft` OK
21,227 ft
15,457 fl'
139,352 ft3 OK
62,129 ft3
11,267 ft3
18.1% % OK
90 %
N (Y or N)
Y (Y or N)
3.20 (unitess)
N (Y or N)
62,129 ft'
31,040 fl
It
It
Y (Y or N)
31,040 R`
21,227 R'
Need 3 ft min.
Area, sediment deanout, top elevation (bottom of pond), A� w
15,457 ft3
"Depth' (distance blw bottom of 10ft shelf and top of sediment)
3.50 ft
Average depth calculated
3.45 tt OK
Average depth used in SAIDA. dn., (Round to down to nearest 0.5ft)
3.5 ft OK
Drawdown Calculations
Drawdown through orifice?
Diameter of odfice (if circular)
Area of odfice (if-noncimular)
Coefficient of discharge (CD)
Driving head (He)
Drawdown through weir?
Weir type
Coefficient of discharge (C..)
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak now
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpath to width ratio
Length to width ratio
Trash rack for overflow & orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies is:
Y (Y or N)
4.00 in
in'
0.60 (unitless)
0.12 ft
N (Y or N)
(unitless)
(unitless)
It
R
R3lsec
R3lsec
ft'/sec
days
3 :1
OK
10 :1
OK
10.0 ft
OK
3 :1
OK
3.3 :1
OK
N
(Y or N)
Trash rack or similar device recommended.
2.5ft
OK
N
(Y or N)
OK
Y
(Y or N)
OK
Y
(Y or N)
OK
12' Inlet wl
Trash Rack, Inc.
869.50
Form SW401-Wet Detention Basin-Rev.9<11e/12
Parts I. 6 II. Design Summary, Page 2 of 2

Permit
(to be provided by DWO)
III?'.REQ;" tfr, `' f °;
r __. _UIRED)ITEMS'lCHECKLIST_ #dr ..._e.r1...�
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials
Sheet No.
—1 U
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
C—
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond With hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip.
3. Section view of the wet detention basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
C »
4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
SEc,1
on the plans prior to use as a wet detention basin.
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided.
6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
�6Y+vS N''CT W Y'GQ 9. A copy of the deed restrictions (if required).
SEc'% ,
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Part III. Required Items Checklist, Page 1 of 1

®W�
NCDENR
Project name
Contact person
Phone number
Date
Drainage area number
Pe No.
fro be provided byDWO)
C
C
?ioo�lda p12 2
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
II: DESIGN. INFORMATION
Site Characteristics
Drainage area 407,935 ffz
Impervious area, post -development 250,159 flz
%impervious 61.32 %
Design rainfall depth 1.0 in
Storage Volume: Non -SA Waters
Minimum volume required 20,461 0'
Volume provided 26,757 i
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
1.5" runoff volume It,
Pre -development 1-yr, 24-hr runoff fit,
Post -development 1-yr, 24-hr runoff ii
Minimum volume required It,
Volume provided to
Peak Flow Calculations
Is the prelpost control of the lyr 24hr storm peak flow required? N (Y or N)
1-yr, 24-hr rainfall depth NA In ��\� �H•CAR0
Rational C, pre -development 69.00 (unitless)
Rational C, post -development 87.00 (unitless) �►•j0, , 9
Rainfall Intensity', 1-yr, 24-hr storm inlhr _ III'YM4`f a'° SEAL -
Pre -development l-yr,24-hrpeak flow ft'Isec E 042470
Post -development 1-yr, 24-hr peak flow ftslsecf
PrelPost 1-yr, 24-hr peak flow control fissec '• FN rGQ' • '�
Elevations i��F'•. GIN6.•�QC��.
Temporary pool elevation 896.50 fmsl �ii 7OHAE"-'6
Permanent pool elevation 895.00 fmsl
SHWT elevation (approx. at the perm. pool elevation) fmsl
Top of 10ft vegetated shelf elevation 895.50 fmsl
Bottom of 1 Oft vegetated shelf elevation 894.50 fmsl
Sediment cleanoul, lop elevation (bottom of pond) 891.00 fmsl
Sediment deanou4 bottom elevation 890.00 fmsl
Sediment storage provided 1.00 it
Is there additional volume stored above the state -required temp. pool? Y (Y or N)
Elevation of the top of the additional volume 896.5 mat OK
Forth SW401-Wet Detention Basin-Rev.94118112 Parts I. & 11. Design Summary, Page 1 of 2

Permit
(to be provided by DWG)
II. DESIGN INFORMATION
Surface Areas
Area, temporary pool
16,503 It'
Area REQUIRED, permanent pool
12,238 Its
SAIDA ratio
3.00 (unitless)
Area PROVIDED, permanent pool, Ap,,,,,_,u
15,674 ft`
Area, bottom of 10ft vegetated shelf, A, u,,
9,377 ft'
Area, sediment cleanout, top elevation (bottom of pond), Ab.r
6,187 ft
Volumes
Volume, temporary pool
26,757 ft'
Volume, permanent pool, Vp,,,-"
40,614 ftn
Volume, forebay (sum of forebays if more than one forebay)
7,545 ft'
Forebay %of permanent pool volume
18.6% %
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
N (Y or N)
Mountain/Piedmont SAIDA Table Used?
Y (Y or N)
SAIDA ratio
3.00 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
N (Y or N)
Volume, permanent pool, Vo, Poy
40,614 ft'
Area provided, permanent pool, Ar, p,
15,674 it'
Average depth calculated
ft
Average depth used in SAIDA, d„, (Round to nearest 0.5ft)
ft
Calculation option 2 used? (See Figure 10-2b)
Y (Y or N)
Area provided, permanent pool, A...
15,674 ft`
Area, bottom of 1Oft vegetated shelf, Aye "f
9,377 ft'
OK
OK
OK
Need 3 ft min.
Area, sediment cleanout, top elevation (bottom of pond), A,y w
6,187 fill
'Depth' (distance blw bottom of 10ft shelf and top of sediment)
3,50 It
Average depth calculated
3.30 ft OK
Average depth used in SAIDA, dN, (Round to down to nearest 0.5ft)
3.5 It OK
Drawdown Calculations
Drawdown through orifice?
Diameter of orifice (if circular)
Area of orifice (iI-noncircular)
Coefficient of discharge (Co)
Driving head (Ha)
Drawdown through weir?
Weir type
Coefficient of discharge (C..)
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of towpath to width ratio
Length to width ratio
Trash rack for overflow 8 orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies is:
Y (Y or N)
3.00 in
in'
0.60 (unitless)
0,16 It
N (Y or N)
(unitless)
ft
If
NA ft'lsec
NA ft/sec
NA ft"/sec
NA days
Insufficient drawdown time. Must be within 2-5 days.
3 :1
OK
10 :1
OK
10.0 It
OK
5:1
OK
6.3 :1
OK
N
(Y or N)
Trash rack or similar device recommended.
1.0ft
OK
N
(Y or N)
OK
Y
(Y or N)
OK
Y
(Y or N)
OK
12' Inlet wl Trash Rack, Inc.
891
Form SW401-Wet Detention Basin-Rev.94/18t12 Parts 1.811. Design Summary, Page 2 of 2

Permit
III. REQUIRED ITEMS CHECKLIST
(to be provided by DWQ)
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Initials Sheet No.
'X S 1 U7
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High Flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
15Wv? Q— 1I\
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip.
3. Section view of the wet detention basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
C `I I)
4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
krv45
5
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay,
to verify volume provided.
�ht4
G- I11
6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
SecT,
entire drainage area is stabilized.
7. The supporting calculations.
1404S
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
Nf " 9. A copy of the deed restrictions (if required).
5 tcY.
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Part III. Required Items Checklist, Page 1 of 1

:fJ
Permit No.
(to be provided by DW0)
}
®M'...
NCDENR
-�..
!7+
`®
O F W A TFH
s o
STORMWATER MANAGEMENT PERMIT APPLICATION FVfg
401 CERTIFICATION APPLICATION FORM ip j
WET DETENTION BASIN SUPPLEMENT $,'
This form must be filled out, printed and submitted. 00
The Required Items Checklist (Pad 111) must be printed, filled out and submitted along with all of the required information.
Project name
Contact person
Phone number
Date
Drainage area number
826-252-0575
NC Data
II.yaDESIGKINFORMATIONI?
Site Characteristics
Drainage area 407,935 ft'
Impervious area, post -development 250,159 ft'
%Impervious 61.32 %
Design rainfall depth 1.0 in
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5' runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the pretpost control of the lyr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall Intensity: 1-yr, 20r storm
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
PrelPost 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm, pool elevation)
Top of 1 Oft vegetated shelf elevation
Bottom of 10ft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state -required temp. pool?
Elevation of the top of the additional volume
20,461 ft'
26,757 ft3
n'
It,
ft3
to
ft,
N (Y or N)
NA In
69.00 (uni less)
87.00 (untless)
inlhr
ft'/sec
ft'Isec
fl'Isec
896.50 hnsl
895.00 fmsl
first
895.50 fmsl
894.50 fmsl
891.00 fmsl
890.00 final
1.00 It
OK, volume provided is equal to or in excess of volume required.
Y (Y or N)
696.5 fmsl OK
\A CAR0I�
_ 1'rrYrO��S/ '•y9
a SEAL r•
042470 _
�•• li-i6^7�1�: 2�
i l '•F..GINEF'�'•C���
HAE1.5`\P``�
Form SW401-Wet Detention Basin-Rev.94/18112
Pans I. a II. Design Summary, Page 1 of 2

Penult No.
Is) be provided by DWQ)
IF
IINDESIGN]NEORMATION
Surface Areas
Area, temporary pod 16,503 fl
Area REQUIRED, permanent pool 12,238 f?
SAGA ratio 3.00 (unifless)
Area PROVIDED, permanent pool, Aym 15,674 ft' OK
Area, bottom of 10ft vegetated shelf, A., 9,377 It`
Area, sediment deanouL lop elevation (bottom of pond), AbLp� 6,187 ft`
Volumes
Volume, temporary pool
26,757 ft3
Volume, permanent pool, V.-P.
40,614 ft3
Volume, forebay (sum of forebays if more than one forebay)
7,545 ft3
Forebay %of permanent pool volume
18.6% %
SAIDA Table Data
Design TSS removal
Coastal SAIDA Table Used?
Mountain/Redmont SAIDA Table Used?
SAIDA ratio
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
Volume, permanent pod, Vwuw
Area provided, permanent pod, Aoemam
Average depth calculated
Average depth used in SAIDA, d„., (Round to nearest 0.5ft)
Calculation option 2 used? (See Figure 10-2b)
Area provided, permanent pool, Ape,,,_„i
Area, bottom of 1011 vegetated shelf, Abst_mei
90 %
N (Y or N)
Y (Y or N)
3.00 (unidess)
N (Y or N)
40,614 fl'
15,674 ft
If
it
Y (Y or N)
15,674 ftr
9,377 ft
OK
OK
Need 3 ft min.
Area, sediment deanoul, lop elevation (bottom of pond), A,,.,
6,187 ft
'Depth' (distance b/w bottom of 10ft shelf and top of sediment)
3.50 it
Average depth calculated
"3.30ft OK
Average depth used In SAIDA, d„, (Round to down to nearest 0.5ft)
3.5 ft OK
Drawdown Calculations
Drawdown through orifice?
Diameter of orifice (it circular)
Area of orifice (if-roncircular)
Coefficient of discharge (Co)
Driving head (He)
Drawdown through weir?
Weir type
Coefficient of discharge (C,)
Length of weir (L)
Driving head (H)
Pre -development 1-yr. 24-hr peak flow
Post -development 1-yr. 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume dawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpath to width ratio
Length to width ratio
Trash rack for overflow 8 orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capuras all runoff at ultimate build-oul?
Drain mechanism for maintenance or emergencies is:
Y (Y or N)
3.00 in
in'
0.60 (unitess)
0.16 it
N (Y or N)
(unifless)
(unidess)
it
It
NA ft3/sec
NA ft3/sec
NA ft3/sec
NA days
Insufficient drawdown time. Must be within 2-5 days.
3 :1
OK
10 :1
OK
10.0 If
OK
5 :1
OK
6.3 :1
OK
N (Y or N)
Trash rack or similar device recommended.
1.0 it
OK
N (Y or N)
OK
Y (Y or N)
OK
Y (Y or N)
OK
12' Inlet w/ Trash Rack, Inc.
891
Forth SW401-Wet Deten9on aeslnRev.9.4r18r12
Parts I. d I. Design Summery, Page 2 of 2

Permit
(to be provided by DWQ)
1114tREQl11RED11TEM.S;CHECKLIS,Ti ;r:�.; � F " ; l � ���tl MELEE,
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Initials
Sheet No.
kAkS
- 1 J7
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High Flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
lNOAF?
C-1��
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip.
3, Section view of the wet detention basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
C -11)
4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
KWy$
S D 5�5
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided.
ChM S
G- l I i
6. A construction sequence that shows how the wet detention basin will be protected from sediment unfit the
5eG7
entire drainage area is stabilized.
r
7. The supporting calculations.
(A,MS
WkJA16D
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
Kf�hNi"(" 9. A copy of the deed restrictions (if required).
5 dc.T.
w ",Is_ 10, A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Part III. Required Items Checklist, Page 1 of 1

Permit Number:
(to he provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this 13MP. This maintenance record will be kept in a
log in a known set location. Any deficient 13MP 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.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is 1rcw ded. �� `'�
°b 0 `
This system (check one):
N G G
5� a
❑ does ®does not
incorporate a vegetated filter at the outleg a i
o CA r O
This system (check one):
❑ does ® does not
IA'�ns;
incorporate pretreatment other than a fore[A.
CP
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month 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 should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove 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
Maintain vegetation at a height of
long.
I approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page I of 4

Permit Number:
(to be provided by DVVQ)
Drainage Area Number: 1-
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
Swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the Swale if necessary to
Swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
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.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than s ra in .
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying,
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4
Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number: 1
BMP element:
Potential problem
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 4' feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 4' feet in the forebay, the sediment shall
be removed.
BASIN DIAGRAM
(fill in the blanks)
17 Permanent Pool Elevation 873.5
Sediment Removal - . 869.5 Pe manta Pool
-------------- Volume Sediment Removal Elevation 8 99.5 Volume
Bottom Blevatiot R68.5 -ft Min. ----------------------------------------- ------
Sediment Bottom Elevation 868.5 1-ft tr
Storage Sedimct
Storage
EOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4
Page 3 of 4

Permit Number:
(to be provided by DIVQ)
1 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:NC Data Campus Phase B
RA4P drainage area number: I
Print name:
Address: 101 1" Street East
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, CA-& e. R 6 d , a Notary Public for the State of
/�0�CAUunlft , County of CA-rµw84 do hereby certify that
personally appeared before me this
day of (a),tS ER u5 and acknowledge the due execution of the
forgoing wet detention basin maintenance rre�quuiirements. Witness my hand and official
seal,
_40,� EEn`0O lew�R>�l G R�
Y UU
U r 20��
.
SEAL
My commission expires r d —ot 01 1O
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

r
,AIL?Djli%ly�
.�' _J •� Graf

;f
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin 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.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one isrovided.
This system (check one):
O Q
does ® does not
incorporate a vegetated filter at the ou �� a
US. i
This system (check one):
Ln
� r
❑ does ® does not
incorporate pretreatment other than a for4.
Important maintenance procedures: m
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
- If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month 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 should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove 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
Maintain vegetation at a height of
long.
I approximately six inches.
Page 1 of 4
Form SW401-Wet Detention Basin O&M-Rev.4

Permit Number:
(to be providefl by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
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.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Paget of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number: 2
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
1 Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 4' feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 4' feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 873.5
869.5 1 Pe anen Pool
----------- Volume Sediment Removal Elevation 869.5 Volur
868.5 -ft Min. -----------------------------
Sediment Bottom Elevation 868.5 I 1-ft TV
Storage Sedin
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4
Page 3 of 4
Storage

Permit Number:
(to 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:NC Data Campus Phase B
BMP drainage area number:
Print name: Donald E. Duncan, Jr.
Title:City Manager
Address: 101 1st Street East
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, ("A,& 0. R & 4 , a Notary Public for the State of
APR NkLjt # , County of CA TA W66 , do hereby certify that
� (� A U F- _ OVA& i 1/� - personally appeared before me this A
day of aV S LA , A015 , and acknowledge the due execution of the
forgoing wet detention basin maintenaM
uiremments. Witness my hand and official
seal, /� 1. .
&ak
ew m- G k>
SEAL
My commission expires b - of . -d of L
Form SW401-Wet Detention Basin O&M-Rev.4
Page 4 of 4

High Density Commercial Subdivisions 1
Deed Restrictions & Protective ConvenancesCDo n
00 iCO
In accordance with Title 15 NCAC 2H.1000 and S.L. 2006-246, the Management Reg§la dAE'd L
restrictions and protective covenants are required for High Density Commercial Sub>�iW ns Mere
lots will be subdivided and sold and runoff will be treated in an engineered stormwatergotu facitify. v Deed restrictions and protective covenants are necessary to ensure that the developmg�yylrgnaintains a
built -upon area consistent with the design criteria used to size the stormwater control fa�ftflrfy.
0
m
I, Scott Millar, acknowledge, affirm and agree by my signature below, that I will cause the following
deed restrictions and covenants to be recorded prior to the sale of any lot within the project known as
NC Data Campus Phase B:
1. The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number , as issued by the Division of Energy, Mineral
and Land Resources under the Stormwater Management Regulations.
2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to
maintain compliance with the stormwater management permit.
3. These covenants are to run with the land and be binding on all persons and parties claiming
under them.
4. The covenants pertaining to stormwater may not be altered or rescinded without the express
written consent of the State of North Carolina, Division of Energy, Mineral and Land Resources.
5. Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the Division of Energy, Mineral and Land Resources.
6. The maximum allowable built -upon area per lot is square feet.
*Note: If the BUA per lot varies, please substitute the following statement for the one above and
provide a complete listing of the proposed BUA for each lot:
The maximum built -upon area per lot, in square feet, is as listed below:
Lot # BUA Lot # BUA Lot # BUA Lot # BUA
1 251,919 SF 2 252,099 SF 3 247,938 SF
This allotted amount includes any built -upon area constructed within the lot property boundaries,
and that portion of the right-of-way between the front lot line and the edge of the pavement. Built
upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate,
coquina and parking areas, but does not include raised, open wood decking, or the water
surface of swimming pools.
7. All runoff from the built -upon areas on the lot must drain into the permitted system. This may be
accomplished through a variety of means including roof drain gutters which drain to the street,
grading the lot to drain toward the street, or grading perimeter swales to collect the lot runoff
and directing them into a component of the Stormwater collection system. Lots that will naturally
drain into the system are not required to provide these additional measures.
8. The owner of each lot, whose ownership is not retained by the permittee, is required to submit a
separate stormwater permit application to the Division of Energy, Mineral and Land Resources
and receive a permit prior to construction.
9. The project and each lot will maintain a 30** foot wide vegetated buffer between all impervious
areas and surface waters.
**50 foot for projects located in the 20 coastal counties.
Form DRPC-1 Rev.2 05Nov2009 Page I oi'2

i
High Density Commercial Subdivisions
,..\lotary Public in the
State of NO R,"fld C I+t LI /Uli- , County of C{��} V%Q 61 ,
do hereby certify that S%DT MI U 9 personally appeared
before me this the, a.1JD day of -.1MVE AA,Mk 201 S , and acknowledge
the a execution of the foregoing instrument. Witness my hand and official seal,
( SEAL
Signatur e4ltM C. 460
/
My Commission expires LD
1,• i.•:......••��
we
Form DRPC-1 Rev.2 05Nov2009 Page 2 of 2

4A

High Density Commercial Subdivisions
Deed Restrictions & Protective Convenances
F. T
C r 1 • ,
In accordance with Title 15 NCAC 2H.1000 and S.L. 2006-246, the Management Re Ijo»s, de'
restrictions and protective covenants are required for High Density Commercial Sudi sons where
lots will be subdivided and sold and runoff will be treated in an engineered stormwategmto facility. (n
Deed restrictions and protective covenants are necessary to ensure that the develop r nYpintatfis a C
built -upon area consistent with the design criteria used to size the stormwater control c
m ce cr+ rn
I, Scott Millar, acknowledge, affirm and agree by my signature below, that I will cause ollowing
deed restrictions and covenants to be recorded prior to the sale of any lot within the pr ct known as v
NC Data Campus Phase B:
1. The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number , as issued by the Division of Energy, Mineral
and Land Resources under the Stormwater Management Regulations.
2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to
maintain compliance with the stormwater management permit.
3. These covenants are to run with the land and be binding on all persons and parties claiming
under them.
4. The covenants pertaining to stormwater may not be altered or rescinded without the express
written consent of the State of North Carolina, Division of Energy, Mineral and Land Resources.
5. Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the Division of Energy, Mineral and Land Resources.
6. The maximum allowable built -upon area per lot is square feet.
*Note: If the BUA per lot varies, please substitute the following statement for the one above and
provide a complete listing of the proposed BUA for each lot:
The maximum built -upon area per lot, in square feet, is as listed below:
Lot # BUA Lot # BUA Lot # BUA Lot # BUA
1 251,919 SF 2 252,099 SF 3 247,938 SF
This allotted amount includes any built -upon area constructed within the lot property boundaries,
and that portion of the right -of --way between the front lot line and the edge of the pavement. Built
upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate,
coquina and parking areas, but does not include raised, open wood decking, or the water
surface of swimming pools.
7. All runoff from the built -upon areas on the lot must drain into the permitted system. This may be
accomplished through a variety of means including roof drain gutters which drain to the street,
grading the lot to drain toward the street, or grading perimeter swales to collect the lot runoff
and directing them into a component of the stormwater collection system. Lots that will naturally
drain into the system are not required to provide these additional measures.
8. The owner of each lot, whose ownership is not retained by the permittee, is required to submit a
separate stormwater permit application to the Division of Energy, Mineral and Land Resources
and receive a permit prior to construction.
9. The project and each lot will maintain a 30** foot wide vegetated buffer between all impervious
areas and surface waters.
**50 foot for projects located in the 20 coastal counties.
Form DRPC-1 Rev.2 05Nov2009 Page t of 2

`f
State of NbVIA CAULI/VA— ,County of wQ6- ,
do hereby certify that SCO-T MJ U h personally appeared
before me this the 1tip day of KjhV6AA A6R 2015—, and acknowledge
the �e execution of the foregoing instrument. Witness my hand and official seal,
C SEAL
Signatur C42ij C.
My Commission expires I_� �d� -� U� y G' ••••
PUQ' ptPAY
'+o"rWBA
Form DRPC-1 Rev.2 05Nov2009 Page 2 of 2

DEMLR USE ONLY
Date Received
Fee Paid
Permit Number
_I
Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008. ❑ Ph 11 - Post Construction .
(select all that apply) ❑ Non -Coastal SW- I-IQW/ORW Waters ❑ Universal Stormwater Management Plan
❑ Other WQ M mt Plan:
State of North Carolina
Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources
STORMWATER MANAGEMENT PERMIT APPLICATION FO Kt-CF�VED
This form may be photocopied for use as an original
L GENERAL INFORMATION en
1. Project Name (subdivision, facility, or establishment
specifications, letters, operation and maintenance ag
2. Location of Project (street address):
City:Conover
3. Directions to project (from nearest major intersection):
iti I'1'f ' t3 Nis
'il Ja
cor ntwithprojey*t-KTteARbLl621TY
rn STORMWATER PERMITTING
0
Zip:28613
The main entrance to the project site, is located off Thornburg Drive Extension, approximately 2,800 ft NW of
the intersection of Thornburg Rd and NC Rte. 16, in between the Tri-City Baptist Church and the Walmart
4. Latitude:35° 43' 56.28" N Longitude:810 12' 29.56" W of the main entrance to the project.
PERMIT INFORMATION:
a. Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modificationt
tRenesonls with modifications also requires SWU-102 - Rcnetonl Application Foam
b.If this application is being submitted as the result of a modification to an existing permit, list the existing
permit number , its issue date (if known) and the status of
construction: ®Not Started ❑Partially Completed* ❑ Completed* *provide a designer's certificntiom
2. Specify the type of project (check one):
❑Low Density ®I-ligh Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state stormwater management permit application, list the stormwater project number,
if assigned, and the previous name of the project, if different than currently
proposed,
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑LAMA Major ®Sedimentation/Erosion Control: 42.64 ac of Disturbed Area
❑NPDES Industrial Stormwater Z404/401 Permit: Proposed Impacts Wetland - 0.06 Acre
b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit401 Permit- NC Data Center, DWR# 15-0841, September 1, 2015 '
Sedimentation/erosion Control - NC Data Campus CATAW-2013-016, June 11, 2013
5. Is the project located within 5 miles of a public airport? ®No ❑Yes
Form SWU-101 Version Oct.31, 2013 Page 1 of

If yes, see S.L. 2012-200, Part VI: http://porta1.ncdenr.orK/web/Ir/rules-and-regulations
III. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization:City of Conover
Signing Official & Title:Donald E. Duncan, Jr. - City Manager
b.Contact information for person listed in item 1a above
Street Address:101 1st Street East
City:Conover State:NC Zip:28613
Mailing Address (if applicable):P.O. Box 549
City:Conover State:NC Zip:28613
Phone: (828 ) 464-1191
Eiiiail:[e-mail]
Fax: (828 ) 464-5177
c. Please check the appropriate box. The applicant listed above is:
❑ The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact information, item 2a and
2b below)
® Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. ('Phis is the
person who owns the property that the project is located on):
Property Owner/Organization:Catawba County Property Development Corporation
Signing Official & Title:Scott Millar - President
b.Contact information for person listed in item 2a above:
Street Address:1960-13 131h Avenue Drive, SE
City:Hickory State:NC Zip:28602
Mailing Address (ifapplicable):PO Box 3388
City:Hickory State:NC Zip:28603
Phone: (828 ) 267-1564
Email:edcOOcatawbacountync.gov
Fax: (828 ) 267-1884
3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Orga
Signing Official & Title:_
b.Contact information for person listed in item 3a above:
Mailing A
Phone: ( ) Fax:
Email:
4. Local jurisdiction for building permits: City of Conover - Planning Department
Point of Contact:0. Lance Hight Phone N: (828 ) 464-1191
Form SWU-101 Version Oct. 31, 2013 Page 2 of 6

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Two Wet Detention Ponds will be provided to treat stormwater runoff from the proposed project site.
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.lf claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW -1995 ❑ Ph II - Post Construction
3. Stormwater runoff from this project drains to the Catawba River basin.
4. Total Property Area: 55.43 acres
5. Total Coastal Wetlands Area: acres
6. Total Surface Water Area: 1.80 acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Area*: 53.63 acres
Total project area shall be calculated to exclude thefollowing: the normal pool of impounded structures, the area
between the banks of streanis and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHW) line, and coastal zoetlands landward froru the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BUA). Nou-coastal zoetlands landward of the NHW (or MHW) lice rnny
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 32.20
9. How many drainage areas does the project have?2 (For high density, count 1 for each proposed engineered
storuaoater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drainage Area I
Drainage Area 2
Draina5ze Area _
Drainage Area _
Receiving Stream Name
Lyle Creek
UT to Lyle Creek
Stream Class *
C
C
Stream Index Number *
11-76-(0.5)
11-76-(0.5)
Total Drainage Area (so
886,827
407,935
On -site Drainage Area (so
886,827
407,935
Off -site Drainage Area (so
0
0
Proposed Impervious Area** (so
550,164
250,159
% Impervious Area** total
62%
61%
Impervious— Surface Area
Drainage Area I
Drainage Area 2
Drainage Area _
Drainage Area _
On -site Buildings/Lots (so
On -site Streets (so
37,336
On -site Parking (so
On -site Sidewalks (so
11,031
Other on -site (so
Future (so
501,797
250,159
Off -site (so
Existing BUA*** (so
Total. (so:
1 550,164
1 250,159
Strewn Class and Index Number can be determined at: http://portaLrtcdenr.or koeb/zoq/ps/csu/classi cations
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidezoalks, gravel areas, etc.
Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6

***Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
11. 1-low was the off -site impervious area listed above determined? Provide documentation.
Projects in Union County: Contact DF,MLR Central Office staff to check ifthe project is located within a Threatened &
Endangered Species watershed that nun, be subject to more stringent stornnvater'requirements as per I511 NCAC 02B .0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from http:/ /t)ortal.ncdenr.ore/web/wq/ws/su/Limo-manual.
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application
instruction sheet and BMP checklists are available from
http://portal.ticticnr.org web/wq/ws/su/statesw/forms_docs. The complete application package should be
submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the
interactive online map at http://portil.nc(ienr.ory/web/wq/ws/su/maw.)
Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions
for each submitted application package from http://portal.ncdenr.org/web/wq/ws/eu/statesw/forms does.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form. `UPS
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants 1,Ws
Form. (if required as per Part Vll behmo)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envhelp.org/pages/onestol2express.htmI for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within'h mile of the site boundary, include the
mile radius on the map.
7. Sealed, signed and dated calculations (one copy).
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MI-IW or NFIW line of tidal
waters, and any coastal wetlands landward of the MI-1 W or NI-1 W lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MH W (or NFI W) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished Floor elevations.
I. Details of roads, drainage features, collection systems, and stormwater control measures.
in. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
o. Drainage areas delineated (included in the main set of plans, not as a separate document).
\(_ WS
for Y 1 S
KY�S
Form SWU-101 Version Oct. 31, 2013 Page of

p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SH WT elevations (Please identifyY��
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"xl"I" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verify the SHVVP prior
to submiltal, [phone].) S
10. A copy of the most current property deed. Deed book: 03151 Page No: 1941-1942
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC G'tr^`D
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 21-1.1003(e).
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
litti)://www.secretarv.state.tic.us/Cort)orations/CSearch.ast)x
VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outpmcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be
provided as an attachment to the completed and notarized deed restriction form. The appropriate deed
restrictions and protective covenants forms can be downloaded from httu://portil.ncdenr.or}Jweb/ir/state-
stormwater-forms does. Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any lot.
Vill. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Fngineer:Kyle M. Seaman, PH
Consulting Firm: McGill Associates
Mailing Address:P.O. Box 2259
City:Asheville State:NC Zip:28802
Phone: [phone] Fax: (828 ) 252-2518
I?mail:kyle.scamanOnx ilg lengineers.com
IX. PROPERTY OWNER AUTHORIZATION (if Contact information, item 2 has been filled out, complete this
section)
1, (print or type name of person listed in Contact Information, item 2a) Scott Millar certify that 1
own the property identified in this permit application, and thus give permission to (print or hjpe namne of person
listed in Contact Information, item 1a) Donald E. Duncan Jr. with (print or h117e none of organization listed in
Contact Information, item 1a) City of Conover to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Fonn SWU-101 Version Oct. 31, 2013 Page 5 of 6

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back
to me, the property owner. As the property owner, it is my responsibility to notify DEMLR immediately and
submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater
treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility
without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement
action includit the ss ssmen of cud ialties of up to $25,000 per day, pursuant to NCGS 143-215.6.
Signature: Date: �- S
I, —CA PA C QE � a Notary Public for the Statteofty� CWWr•r , County of
cdo hereby certify that S� 11 kI LL A-f— personally appeared
before me thiaway of Nu ,a9S, and ack o ledge t - dyf-4xecutio f the application for
a stormwater permit. Witness my hand and official seal,
C►�R�t r. R, E
SEAL
My commission expires L 0-AL dLb) Y
X. APPLICANT'S CERTIFICATION
1, (print or type name of person listed in Contact Information, item la) Donald E. Duncan, Jr.
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of the
applicable stormwater rules under 15A NCAC 21-1 .1000 and any other applicable state stormwater requirements.
1,Q l"��' , a Notary Public for the State of
_QAtAWAAA do hereby certify that fl_0Mt+U V PJ
before me this day of (�. �as 5 and ackn4ledge the
a stormwater permit. Witness my hand and official seal,
C4)6q- e• /-G
SEAL
Date:
County of
personally appeared
�n of/phe application for
My commission expires 1 hdd�0�
Form SW U-101 Version Oct. 31, 2013 Page 6 of 6

»®x
� >

McGill
PO. BOX 2259 - ASHEVILLE,- NC 28802
PH: [phone]
FIRST CITIZENS BANK
firstcitizens.com
66-30/531
032309
DATE
October 23, 2015
PAY AMOUNT
Five Hundred Five and 00/100 Dollars
TOTE 505.00
ORDER N.C. DENR
OF 1633 Mail Service Center OPERATING ACC UNT
Raleigh, NC 27699-1633 4�w 11,1— 2
A ORIZ- SIGNATURE
u■0 3 2 309D' 1:0 53 L00 300I:00 L 2 L 288 3 L96u■„

State Stormwater Permit
Permit No. SW3151103
City of Conover
NC Data Campus Phase B in Catawba County
Designer's Certification
I, Kyle M. Seaman , as a duly registered Professional Engineer in the
State of North Carolina, having been authorized to observe (periodically/ weekly/
f -11 time) the construction of the project,
NC Data Campus Phase B
(Project Name)
for the City of Conover (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:
CAROB%��
=Es sioti.''�v
Signature _ a SEAL Tr;
042470
Registration Number 042470 ='••
i ! ' FNGiN�F�'• tt��
Date 01/05/2018 ii411C t1E1
cc: NCDENR-DEMLR Regional Office
Page 1 of 1

Permit Number:
(to be provided by DWQ)
Drainage Area Number: 2—
Wet Detention Basin 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.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
O
This system (check one):
❑ does ® does not incorporate a vegetated filter at the outlet. c p�2� ?
This system (check one):
p�lp s
❑ does ® does not incorporate pretreatment other than a forebay.0°d°b
0
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month 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 should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove 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
Maintain vegetation at a height of
long.
I approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number: Z
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the Swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
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.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4
Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device
Clogging has occurred.,
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
1 Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 4' feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 3' feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 52�
892 Pe manen Pool
---------------- Volume Sediment Removal Elevation 891 Volume
891 -ft Min. -------------------------------- ----------- ---
Sediment Bottom Elevation 820 1-ft n
Storage Sedimer
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4
Page 3 of 4

Permit Number:
(to 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 nante:NC Data Campus Phase B
BMP drainage area nnmber:2
Print name:Donald E. Duncan Jr.
Title:City Manager
Address: 101 1" Street East
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.
I, C"A- C. ft" , a Notary Public for the State of
NoR N �q,P,QU/ h , County of CAfi WS A , do hereby certify that
k/JA M E�-• D N S, R� personally appeared before me this aL
day of om qJ _ a0_5 , and acknowledge the due execution of the
forgoing wet detention basin maintenance�ents.
seal.
C
SEAL
My commission expires 1 a" a a. -a of �
Witn s my hand and official
pl�
119-
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

Permit Number:
(to he provided by DWQ)
Drainage Area Number: '2
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this 13MP..['his maintenance record will be kept in a
log in a known set location. Any deficient I3MP 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 I3MP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
-4
This system (check one): tea„? p
❑ does ® does not incorporate a vegetated filter at the outrk p�'L1, 2
9G�y�F �0 0
This system (check one): o P r
❑ does ® does not incorporate pretreatment other than a foreb*
gs+�
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month 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 should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water mail it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at height of
long.
approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page I of 4

Permit Number:
(to he provided by DWQ)
Drainage Area Number: I
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
Swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the Swale if necessary to
Swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
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.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4

Permit Number:
(to be provided br DGPQ)
Drainage Area Number: �.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
the outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 4' feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 3' feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom
892
---------------
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
!ftMill.
Sediment
Storage
Permanent Pool Elevation 895
Pool
Sediment Removal Elevation 891 volume
MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4
1-ft
Storage

Permit Number:
(to be provided (w DWQ)
I acknowledge and agree by my signature below that 1 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.
Prqject nante:NC Data Campus Phase B
BMP drainage area
Print name: Donald E. Duncan Jr.
Title:City Manager
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, ("A 0..t R g" , a Notary Public for the State of
W TV l AjUUA)h , County of CMIAA A , do hereby certify that
personally appeared before me this
ay —
day of (�n�8�, eliXs and acknowledge the due execution of the
forgoing wet detention basin maintenance r uirements.
seal L
i
fCo...:..... \
V 20
w4;9TgWgP..,•.
SEAL
My commission expires 1 a- a I - of �e
Witnr4ss my hand and official
Form SW401-Wet Detention Basin O&M-Rev.4 Page of 4

1
9
r . rrmFli•'