SW7110609_CURRENT PERMIT_20190315

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. SW 11100
DOC TYPE F CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE aO�gQ�j�s
YYYYMMDD

ROY COOPER
MICHkEL S. REGAN
S. D.•1,NIEL SMITH
.-; T =our.
Env on ntal Qualtry
March 15, 2019
Camden County
Attn: Ken Bowman. County Manager
PO Box 190
Camden, NC 27921
Subject: Stormwater Permit No. SW7110609 MOD
Eco-Industrial Park Modification
High Density Project
Camden County
Dear Ken Bowman:
The Washington Regional Office received a complete Stormwater Management Permit
Modification Application for the Eco-Industrial Park project on January 31, 2019. 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.1000. We are forwarding Permit No.
SW7110609 MOD dated March 15, 2019 for the construction of the subject project. The
modification adds one forebay and the associated allowable built upon and drainage area.
This permit shall be effective from the date of issuance until December 13, 2021, shall void
permit SW7110609 issued on December 13, 2011 and shall be subject to the conditions and
limitations as specified therein. Please pay special attention to the Operation and Maintenance
requirements in this permit. Failure to establish an adequate system for operation and
maintenance of the stormwater management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) days following
receipt of this permit. This request must be in the form of a written petition, conforming to
Chapter 150E of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made
this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact
me at [phone].
Sincerely,
William Carl Dunn, PE
Environmental Engineer
cc: Camden County Planning Division (PO Box 190, Camden, NC 27921)
Sean Robey,. PE — Eastern Carolina Engineering, PC (PO Box 128, Camden, NC 27921)
Washington Regional Office
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STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
County of Camden
Eco-Industrial Park
Camden County
FOR THE
construction, operation and maintenance of a constructed wetland and forebay system
in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the
"stormwater rules') and the approved stormwater management plans and specifications
and other supporting data as attached and on file with and approved by the Division of
Energy, Mineral and Land Resources and considered a part of this permit for the Eco-
Industrial Park located near South Mills, NC.
This permit shall be effective from the date of issuance until December 13, 2021 and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.5 of this permit.
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 and permit.
4: The tract will be limited to the amount of built -upon area indicated in Section 1.5
of this permit, and per approved plans. The runoff from all built -upon area within

the permitted drainage areas of this project must be directed into the permitted
stormwater control system.
The following design criteria have been provided for the constructed wetland and
forebay systems and must be maintained at design condition:
Total Site Area: 67.52 acres
Allowable Built -upon Areas per Drainage Basin
W 1
8.03 acres
W 2
10.19 acres
W 3
7.27 acres
W 4
6.36 acres
FBI
1.56 acres
C. Required Surface Areas per Drainage Basin
W 1
40,161 sf
W 2
50,965 sf
W 3
35,529 sf
W 4
37,761 sf
FBI
1,513 sf
Required Storage Volumes per Drainage Basin
W 1
43,725 cf
W 2
55,487 cf
W 3
39,587 cf
W 4
34,632 cf
FBI
8,494 cf
e. Temporary Storage Elevation
for each System
f. Pond Surface Area
g. Design Storm:
h. Receiving Stream:
i. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
14.50 ft
30.0 ac
1.5-inch
UT -Dismal Swamp Canal
C - SW
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plans 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 revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of bypass structure, filter media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DEMLR. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
5. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and 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 system installed 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. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
9. 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 or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.

10. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
11. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times.
12. 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.
13. This permit shall be effective from the date of issuance until December 13, 2021.
Application for permit renewal shall be submitted 180 days prior to the expiration
date of this permit and must be accompanied by the processing fee.
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 formal permit transfer request_to the Division of Energy, Mineral and
Land Resources, accompanied by a completed name/ownership change form,
documentation from the parties involved, and other supporting materials as may
be appropriate. The approval of this request will be considered on its merits and
may or may not be approved. The permittee is responsible for compliance with all
permit conditions until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Energy, Mineral
and Land Resources, in accordance with North Carolina General Statute 143-
215.6A to 143-215.6C.
3. 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,
4. 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.
5. 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.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance 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. A copy of the approved plans and
specifications shall be maintained on file by the Permittee for the life of the
project.
The permittee shall notify the Division of any name, ownership or mailing address
changes within 30 days.
Permit issued this the 15th day of March, 2019:
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Danny Smith, Interim Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Permit Number SW7110609

Stormwater Permit No. SW7110609
Eco-Industrial Park
Camden County
Designer's Certification
I, , as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
(Project)
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.
Note: The checklist on the following page must be included with this Certification. Any
changes or deviations from the approved plans and specifications must be explained in
detail, and may require a permit modification. The certification forms should be
submitted to the Division of Energy, Mineral and Land Resources at the appropriate
Regional office.
SEAL
Signature
Registration Number
Date

Complete this checklist for each system and include with Certification:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are perthe approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent.vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDEQ-DEMLR Washington Regional Office
Camden County Planning Division

"
DEMLR USE ONLY '
Date Received
Fee Paid
Permit Number
111 1
Co
Applicable Rules: ' ❑ Coastal SW -1995
❑ Coastal SW
- 2008 ❑ Ph II - Post Construction
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters
❑ Universal Stormwater Management Plan
❑ Other WQ M mt Plan:
State of North Carolina
r/ n Department of Environment and Natural Resources
lam" Y Division of Energy, Mineral and Land Resources
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION It JuCFTRTF'Tt My ? i 2p)ig
1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Roadway Extension for Camden Commerce Park
2. Location of Project (street address):
200 Opportunity Drive
City:South Mills County:Camden Zip:27976
3. Directions to project (from nearest major intersection):
From the intersection of US 17 and NC 343 in Camden, travel north on US 17 approx 3.9 miles to the Camden
Commerce Park (Eco Park Boulevard) Opportunity Drive is the first road on the left
4. Latitude:36° 31' 27.3" N Longitude:76° 21' 41.9" W of the main entrance to the project.
II. PERMIT INFORMATION:
1. a. Specify whether project is (check one): ❑New ®Modification ❑ Renewal w/ Modificationt
t ReneulalS with modifications also requires SVVU-102 - Renewal Application Form
b.If this application is being submitted as the result of a modification to an existing permit, list the existing
permit numberSW7110609 , its issue date (if known)12/13/2011 and the status of
construction: ❑Not Started ®Partially Completed* ❑ Completed* *provide a designer's certification
2. Specify the type of project (check one):
❑Low Density ®High 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: 3.8 ac of Disturbed Area
❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts
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 permit:
5. Is the project located within 5 miles of a public airport? ®No ❑Yes
If yes, see S.L. 2012-200, Part VI: liUp://portaLncdenr.org/web/Ir/rules-and-regulations
Form SWU-101 Version Oct. 31, 2013 Page I of 6

III. CONTACT INFORMATION
I. 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:Camden County
Signing Official & Title:Ken Bowman County Manager
b.Contact information for person listed in item la above:
Street Address:330 E US 158
State:NC Zip:27921
Mailing Address (if applicable):PO Box 190
City:Camden State:NC Zip:27921
Phone: [phone] x102
Email:[e-mail]
Fax: (252 ) 331-7831
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. (This is the
person who owns the property that the project is located on):
Property Owner/i
Signing Official &
b.Contact information for person listed in item 2a above:
Street Address:
State: Zip:
Mailing Address (if applicable):
Phone: ( ) Fax:
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/Organization:Eastem Carolina Engineering, PC
Signing Official & Title:Sean Robey, Principal
b.Contact information for person listed in item 3a above:
Mailing Add
City:Camden
Phone: (252 ) 335-1888
Email:[e-mail]
State:NC Zip:27921
Fax: (252 ) 331-2390
4. Local jurisdiction for building permits: Camden County
Point of Contact:Dan Porter Phone #: [phone] x263
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.
Roadway stormwater runoff will be conveyed through vegetated swales and into a previously constructed
stormwater wetland and newly constructed forebay. Stormwater runoff from the site development will be
routed to the new forebay which discharges into the existing —30 acre borrow pit pond.
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.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW —1995 ❑ Ph I1— Post Construction
3. Stormwater runoff from this project drains to the Pasquotank River basin.
4. Total Property Area: 98.52 acres 5. Total Coastal Wetlands Area: acres
6. Total Surface Water Area: 31 acres
7. Total Property Area (4) — Total Coastal Wetlands Area (5) — Total Surface Water Area (6) = Total Project
Area':67.52 acres
Total project area shall be calculated to exclude the following: the normal pool of imppounded structures, the area
between the banks of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BLIA). Non -coastal wetlands landward of the NHW (or MHW) line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 50
9. How many drainage areas does the project have?1 (For high density, count I for each proposed engineered
Stormwater BMP. For low density and other projects, use I 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
W1
Drainage Area
W2
Drainage Area
W3
Drainage Area
W4
Receiving Stream Name
Dismal Swamp
Canal
Dismal Swamp
Canal
Dismal Swamp
Canal
Dismal Swamp
Canal
Stream Class
C; Sw
C; Sw
C; Sw
C; Sw
Stream Index Number *
30-3-2
30-3-2
30-3-2
30-3-2
Total Drainage Area (sf)
699,138
887,319
633,125
554,262
On -site Drainage Area (sf)
699,138
887,319
633,125
554,262
Off -site Drainage Area (sf)
0
0
0
0
Proposed Impervious Area** (sf)
349,569
443,660
316,563
277,131
% Impervious Area** (total)
50%
50%
50%
50%°
Impervious** Surface Area
Drainage Area
W1
Drainage Area
W2
Drainage Area
W3
Drainage Area
W4
On -site Buildings/Lots (sf)
0
0
0
0
On -site Streets (sf)
36,948
100,518
135,087
43,887
On -site Parking (sf)
0
0
0
0
On -site Sidewalks (sf)
0
0
0
0
Other on -site (so
0
0
0
0
Future (so
303,314
275,700
177,794
233,244
Off -site (sf)
-
-
-
Existing BUA*** (sf)
9,307
67,442
3,682
0
Total (sf):
349,569
443,660
316,563
277,131
" Stream Class and Index Number can be determined at: luttn://oortal� ncdenr.ororY/zoeb/zugfps/csu/classifications
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
2. a. If claiming vested rights, identify the supporting documents provided and the
❑ Approval of a Site Specific Development Plan or PUD ;ate—
prov
❑ Valid Building Permit Dal
❑ Other:
they were approved:
b.
If claiming vested rights, identify the regulation(s) the project as been designed in accordance with:
❑ Coastal SW —1995 ❑ Ph II — Post Construction
3. Stormwater runoff from this project drains to the
4. Total Property Area
7. Total Property Area (4) —Total
Area': acres
River basin.
5. Total Coastal Wetlands Area: acres
6. Total Surface Water Area: acres
Area (5) — Total Surface Water Area (6) = Total Project
Total project area stall b alcuto ed to exclude the fallowing then
orrual pool of imppounded structures, the area
bettueen the banks of earns and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHW) line, and astal wetlands landzoard front the NH (or MHW) line. The resultant project area is used to
calculate over percent built upon area (BUA). Non -coastal wetlands landeoard of the NHW (or MHW) line nuy
be include n the total project area.
8. Projec�,Kercent of impervious area: (Total Impervious Area / Total Project Area) X 100 =
9. lAKw many drainage areas does the project have?_ (For high density, count 1 for each proposed engineered
/stornnoater BMP. For low density and other projects, use I for the whole property area)
10. Complete the following information for each drainage or�ect Information item 9. If there
are more than four drainage areas in the project, attach a additional sheet ith the information for each area
provided in the same format as below.
Basin Information
Drainage Area FI
Drainage Area _
Drainage Area _
Drainage Area
Receiving Stream Name
Dismal Swamp
Canal
Stream Class *
C; Sw
Stream Index Number *
30-3-2
Total Drainage Area (so
136,343
On -site Drainage Area (so
136,343
Off -site Drainage Area (so
0
Proposed Impervious Area'* (so
68,172
% Impervious Area" (total)
50%
Impervious" Surface Area
Drainage Area El
Drainage Area _
Drainage Area _
Drainage Area
On -site Buildings/Lots (so
14,400
On -site Streets (so
10,098
On -site Parking (so
32,546
On -site Sidewalks (so
516
Other on -site (so
Future (sf)
1 10,612
Off -site (sf)
Existing BUA*** (sf)
1 0
Total (so:
1 68,172
Stream Class and Index Nuniber can be determined at: btty //yortal.ucdenr.ore/web/zur)/ps/csu/classificatimrs
Irripervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6

" Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, 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.
11. How was the off -site impervious area listed above determined? Provide documentation.
Projects in Union County: Contact DEMLR Central Office staff to check if the project is located within a Threatened &
Endangered Species watershed that may be subject to more stringent stornwater requirements as per 1 SA 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'//portal.ncdenr.org/web/wq/ws/su/bmp-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
httu:////portal.ncdenr.org/web/wq/ws/su/statesw/forms does. 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:////12ortal.ncdenr.org/web/wq/ws/su/mates.)
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 ham://portal.ncdenr.org/web/wq/ws/su/statesw/formsdoes.
1. Original and one copy of the Stormwater Management Permit Application Form.
2. Original and one copy of the signed and notarized Deed Restrictions &Protective Covenants
Form. (if required as per Part VII below)
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
httl2://www.envhelp.org/pages/onestopexl2ress.html 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/managementfor
the project. This is required in addition to the brief summary provided in the Project
Information, item 1.
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'iz mile of the site boundary, include the'k
mile radius 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.
I. 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 MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) 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.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
Form SWU-101 Version Oct. 31, 2013 Page 4 of 6

m. 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).
p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SHWT elevations (Please identify
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring togs. Include an 8.5"x11" 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 verifij the SHWT prior
to submittal, [phone].)
10. A copy of the most current property deed. Deed book: 169 Page No: 108
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC
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.
http://www.secretary.state.nc.us/Corl2orations/­CSearch.aspx
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, 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 11ttp://porta1 ncdenr.org/web/h/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.
VIIL 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 Engineer:Sean Robey, PE
Consulting Firm: Eastern Carolina Engineering, PC
Mailing Address:PO Box 128
City:Camden
Phone: (252 ) 335-1888
Email:[e-mail]
State:NC Zip:27921
Fax: (252 ) 331-2390
IX, PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this
section)
I, (print or type name of person listed in Contact Information, item 2a) , certify that I
own the property identified in this permit application, and thus give permission to (print or type name of person
listed in Contact Information, item 1a) with (print or type name of organization listed in
Contact Information, item la) 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.
Form 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 including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
a Notary Public for the State of County of
do hereby certify that
before me this _ day of
personally appeared
and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal,
SEAL
My commission expires
X. APPLICANT'S CERTIFICATION `Ql K(J e k CULc h
I, (print or type name of person listed in Contact Information, item 1a) Ken Bomnian, County Manager
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 stormvyxlter rules undeylSyA,NCAC 2Ff .1000 and any other applicable state stormwater requirements.
Date:lS—r^-J "
I, iC'.rJ�4w12 /�l kzt md1� ir; e_S —a Notary Public for the State of6J0r4-(A t&VO C County of
r ;
do hereby certify that P personally appeared
before me this �J d� of �0 D l and pknowledge the due exec ion of the application for
a stormwater permit. Witness my hand and official seal,
P AIE M yL •��
SEAL Z y NOMRYp y?'
PAS
0VO ANKC V'
cOuNry
Mycommi96y�IV sAW% OU
of listo%
Form SWU-101 Version Oct. 31, 2013 Page 6 of 6

+lSr;ret��I
�Al
�ref+e

High Density Commercial Subdivisions
Deed Restrictions & Protective Convenances
In accordance with Title 15 NCAC 2H.1000 and S.L. 2006-246, the Management Regulations, deed
restrictions and protective covenants are required for High Density Commercial Subdivisions where
lots will be subdivided and sold and runoff will be treated in an engineered stormwater control facility.
Deed restrictions and protective covenants are necessary to ensure that the development maintains a
built -upon area consistent with the design criteria used to size the stormwater control facility.
I, Ken Bowman County Manager , 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
additional lot within the project known as Camden Commerce Park
1. The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number SW7110609 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 built -upon area per lot is as provided in the attached table
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 50 foot wide vegetated buffer between all impervious
areas and surface waters.
Form DRPC-1 Rev.2 05Nov2009 Page t of 2

High Density Commercial Subdivisions
C "41
a Notary Public in the
State of K) ONCit 1'n C-OLy-6UACC. , County of
do hereby certify that"KPyti R)n uL-)m-a vv V personally appeared
before me this the a 5� day of -7�cp,,, � o, n 20 19 , and acknowledge
the due execution of the foregoing instrument. Witness my hand and official seal,
A"L;�Q My`�o
•t ti
Sign U �y NOTARY PUBLIC m�
PA80UOTANK N
COUNTY
My Commission expires
Form DRPC-1 Rev.2 05Nov2009 Page 2 of 2

Camden County Commerce Park
Allowable
Allowable Percentage
Lot tf
Lot Acreage (Ac.)
Lot Coverage (sf)
Lot Coverage (%)
1
2.23
38,522
39.7%
2
2.51
43,359
39.7%
3
2.51
43,359
39.7%
4
2.34
47,539
46.6%
5
2.56
52,008
46.6%
6
3.90
79,231
46.6%
7
2.10
42,663
46.6%
8*
2.52*
58,074*
52.9%*
8**
3.59**
60,721**
38.8%**
9
1.99
40,428
46.6%
10
2.04
41,444
46.6%
11
2.10
36,276
39.7%
12
4.93
85,163
39.7%
13
4.00
29,021
39.7%
14
1.67
29,901
41.1%
15
2.97
53,177
41.1%
16
2.97
53,177
41.1%
17
2.97
50,235
38.8%
18
2.42
40,932
38.8%
19
2.54
81,356
38.8%
Total
48.75 Ac.
* Portion Draining to Forebay 1
** Portion Draining to Wetland 4

ECO PARK WETLAND #1
Total Drainage Area
% Impervious
699138.00 SF
50%
Proposed Impervious Area
Proposed Impervious Area - Streets and Parking
Impervious Area Available for Lots
349,569 SF
46,255 SF 6.62%
303,314 SF 43.38%
Allowable Built Upon % of Total
Allowable Built Upon
Lot#
Acreage
Square Footage
% of Total Acreage
Area per Lot (SF) Drainage Area
as % of Lot Coverage
4
2.34
101,930.40
15.7%
47,539 6.80%
46.6%
5
2.56
111,513.60
17.1%
52,008 7.44%
46.6%
6
3.9
169,884.00
26.1%
79,231 11.33%
46.6%
7
2.1
91,476.00
14.1%
42,663 6.10%
46.6%
9
1.99
86,684.40
13.3%
40,428 5.78%
46.6%
10
2.04
88,862.40
13.7%
41,444 5.93%
46.6%
Totals
14.93
650,350.80
100.0%
303,314 43.38%
ECO PARK WETLAND #2
Total Drainage Area
887319.00 SF
Proposed Impervious Area
443,660 SF
% Impervious
50%
Proposed Impervious Area - Streets and Parking
167,960 SF 18.93%
Impervious Area Available for Lots
275,700 SF 31.07%
Allowable Built Upon % of Total
Allowable Built Upon
Lot#
Acreage
Square Footage
% of Total Acreage
Area per Lot (SF) Drainage Area
as % of Lot Coverage
1
2.23
97,138.80
14.0%
38,522 4.34%
39.7%
2
2.51
109,335.60
15.7%
43,359 4.89%
39.7%
3
2.51
109,335.60
15.7%
43,359 4.89%
39.7%
11
2.1
91,476.00
13.2%
36,276 4.09%
39.7%
12
4.93
214,750.80
30.9%
85,163 9.60%
39.7%
13
1.68
73,180.80
10.5%
29,021 3.27%
39.7%
Totals
15.96
695,217.60
100.0%
275,700 31.07%

ECO PARK WETLAND #3
Total Drainage Area
% Impervious
633125.00 SF
50%
Proposed Impervious Area
Proposed Impervious Area - Streets and Parking
Impervious Area Available for Lots
316,563 SF
138,769 SF 21.92%
177.794 SF 28.08%
Allowable Built Upon
%of Total
Allowable Built Upon
Lot#
Acreage
Square Footage
% of Total Acreage
Area per Lot (SF)
Drainage Area
as % of Lot Coverage
13
2.32
101,059.20
23.4%
41,539
6.56%
41.1%
14
1.67
72,745.20
16.8%
29,901
4.72%
41.1%
15
2.97
129,373.20
29.9%
53,177
8.40%
41.1%
16
2.97
129,373.20
29.9%
53,177
8.40%
41.1%
Totals
9.93
432,550.80
100.0%
177,794
28.08%
ECO PARK WETLAND #4
Total Drainage Area 554262.00 SF
% Impervious 50%
Proposed Impervious Area
Proposed Impervious Area - Streets and Parking
Impervious Area Available for Lots
277,131 SF
43,887 SF 7.92%
233,244 SF 42.08%
Allowable Built Upon
% of Total
Allowable Built Upon
Lot#
Acreage
Square Footage
% of Total Acreage
Area per Lot (SF)
Drainage Area
as % of Lot Coverage
8
3.59
156,380.40
26.0%
60,721
10.96%
38.8%
17
2.97
129,373.20
21.5%
50,235
9.06%
38.8%
18
2.42
105,415.20
17.5%
40,932
7.38%
38.8%
19
4.81
209,523.60
34.9%
81,356
14.68%
38.8%
Totals
13.79
600,692.40
100.0%
233,244
42.08%

FOREBAY #1
Total Drainage Area
136343.00 SF
Proposed Impervious Area
68,172 SF
% Impervious
50.00%
Proposed Impervious Area - Streets and Parking
10,098 SF 7.41%
Impervious Area Available for Lots
58,074 SF 42.59%
Allowable Built Upon %of Total
Allowable Built Upon
Lot#
Acreage
Square Footage % of Total Acreage Area per Lot (SF) Drainage Area
as % of Lot Coverage
8
2.52
109,771.20 100.0% 58,074 42.59%
52.9%
Totals
2.52
109,771.20 100.0% 58,074 42.59%

Permit Number:
(to be provided by DWQ)
Drainage Area Number: 1 — 4-
Stormwater Wetland Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— Immediately after the stormwater wetland is established, the wetland plants will
be watered twice weekly if needed until the plants become established
(commonly six weeks). i nIK�,i
— No portion of the stormwater wetland will be fertilized after the first initial
fertilization that is required to establish the wetland plants. ��N 7 2011
— Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the wet detention basin. f
— Once a year, a dam safety expert will inspect the embankment.
After the wet detention pond is established, I will inspect it 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 will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
wetland
Areas of bare soil and/or
erosive gullies have formed.
Regrade the soil if necessary to
remove the gully, and then plant a
ground cover and water until it is
established. Provide time and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.
The inlet device: pipe or
The pipe is clogged (if
Unclog the pipe. Dispose of the
Swale
applicable).—
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW401-Wetland O&M-Rev.3
Page 1 of 4

BMP element:
Potentialproblem:
How 1 will remediate theproblem:
The forebay
Sediment has accumulated in
Search for the source of the
the forebay to a depth that
sediment and remedy the problem if
inhibits the forebay from
possible. Remove the sediment and
functioning well.
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 a pesticide is used, wipe it
on the plants rather than s ra in .
The deep pool, shallow
Algal growth covers over
Consult a professional to remove
water and shallow land
50% of the deep pool and
and control the algal growth.
areas
shallow water areas.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray) -
the deep pool and shallow
consult a professional.
water areas.
Shallow land remains flooded
Unclog the outlet device
more than 5 days after a
immediately.
storm event.
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.
Best professional practices
Prune according to best professional
show that pruning is needed
practices.
to maintain optimal plant
health.
Sediment has accumulated
Search for the source of the
and reduced the depth to 75%
sediment and remedy the problem if
of the original design depth
possible. Remove the sediment and
of the deep pools.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Form SW401-Wetland O&M-Rev.3 Page 2 of 4

BMP element:
Potentialproblem:
How 1 will remediate theproblem:
The embankment
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.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
The micropool
Sediment has accumulated
Search for the source of the
and reduced the depth to 75%
sediment and remedy the problem if
of the original design depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Plants are growing in the
Remove the plants, preferably by
micropool.
hand. If a pesticide is used, wipe it
on the plants rather than spraying.
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 NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Wetland O&M-Rev.3 Page 3 of 4

Perm it Number: 5&, 71149r1iO/
(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: ECO-INDUSTRIAL PARK
BMP drainage area number: 1 —
Print name: RANDALL WOODRUFF
Title: COUNTY MANAGER
Address: 117 NORTH NC 343
Phone: [phone] EXT. 222
Date: Cam/ f
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, L I to Ly • I l ;�X'M.s , a Notary Public for the State of
h vy U- �loe �l w , County of do hereby certify that
a.v d lip IAA V-Ud" " personally appeared before me this
day of c lot) , and acknowledge the due execution of the
forgoing stormwater wetland maintenance requirements. Witness my hand and official
seal, C>� LUA-e-) d('.t e&-0,4YO
:` t`IOTgRy�'c
NOUN;,``.
SEAL
My commission expires 10 / a & / ao/l
Form SW401-Wetland O&M-Rev.3 Page 4 of 4

High Density Commercial Subdivisions
Deed Restrictions & Protective Convenances
In accordance with Title 15 NCAC 2H.1000 and S.L. 2006-246, the Management Regulations, deed
restrictions and protective covenants are required for High Density Commercial Subdivisions where
lots will be subdivided and sold and runoff will be treated in an engineered stormwater control facility.
Deed restrictions and protective covenants are necessary to ensure that the development maintains a
built -upon area consistent
with the design criteria used to size the stormwater control facility.
I, R4 7i 0_1/ , acknowledge, affirm and agree by my signature below, that
I will cause the following deed restrictions and ovenants t b reco ded prior to the sale of an lot
within the project known as ,�co gym% Q y
The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number U o , as issued by the Division of Water Quality
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 Water Quality.
5. Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the Division of Water Quality,
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: �t ff
The maximum built -upon area per lot, in square feet, is as listed below: Ar:5 ` //�` Ae d
8u.4 Tc,h%es
Lot # BUA Lot # BUA Lot # BUA Lot # BUA
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.
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 Water Quality 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.
JUN 17 2011
Form DRPC-1 Rev.2 05Nov2009 Page 1 of 2

High Density Commercial Subdivisions
Deed Restrictions & Protective Convenances
Signature:
I
I, L. , I I . F. ". U i � I , a Notary Public in the
State of M QRL - , O,afU, L,n County of 1 'A.= A-z .
do hereby certify that R A-'t'do U IPOJ p ars nally appeared
before me this the �_ day of "fir , 20I _ �, and acknowledge
the due execution of the foregoing instrument. Witness my hand and official seal,
a SEAL
Signature ..............
My Commission expires o bl ;`o10Tggy�J";
?tea•.
F'.•............ `�•:
,,, yCOUN�\`% / `
Form DRPC-1 Rev.2 05Nov2009 Page 2 of 2

ECO PARK
CAMDEN COUNTY
ECO PARK ALLOWANCE BUA PER LOT SUMMARY
Allowable BUA
Lot #
Lot Acera a
Lot Square Footage
Per Lots .fL
1
2.23
97138.80
29397
2
2.51
109335.60
33088
3
2.51
109335.60
33088
4
2.34
101930.40
22450
5
2.56
111513.60
24561
6
3.90
169884.00
37417
7
2.10
91476.00
20148
8
3.65
158994.00
59442
9
1.99
86684.40
19092
10
2.04
88862.40
19572
11
2.10
91476.00
27683
12
4.93
214750.80
64989
13
4.00
174240.00
55600
14
1.67
72745.20
24085
15
2.97
129373.20
42833
16
2.97
129373.20
42833
17
2.97
129373.20
57166
18
2.42
105415.20
46580
19
4.81
209523.60
92582
Totals
54.67
2381425.20
752606
ECO PARK WETLAND #1
Total Drainage Area 456,073.20
% Impervious 50.0
'Based on lot size
Proposed Impervious Area 228,036.60
Proposed Impervious Area - Streets/Parking 74,052.00
Impervious Area Available for Lots 153,984.60
% x 163994.60
Allowable BUA
Lot #
Acera e
Square Footage
% of total acreage
s .fL
Per Lots .fL •
% of Total
4
2.34
101930.40
14.58%
22450.09
22450
4.92 %
5
2.56
111513.60
15.95%
24560.78
24561
5.39%
6
3.90
169884.00
24.30%
37416.82
37417
8.20%
7
2.10
91476.00
13.08%
20147.52
20148
4.42%
8
1.12
48787.20
6.98%
10745.34
10745
2.36%
9
1.99
86684.40
12.40%
19092.17
19092
4.19%
10
2.04
88862.40
12.71%
19571.87
19572
4.29%
Totals
16.05
699138.00
100.00%
153984.60
153985
'Based on lot size
Page 1 of 3
33.76% % LOTS
16.241 % ROADS
50.00% %TOTAL
BUA

ECO PARK WETLAND #2
Total Drainage Area 815,443.00
%Impervious 50.0
ECO PARK
CAMDEN COUNTY
Proposed Impervious Area 407,721.50
Proposed Impervious Area - Streets/Parking 197,278.00
Impervious Area Available for Lots 210,443.50
x 210443.60
Allowable BUA
Lot #
Acera e
Square Footage
% of total acreage
s .tL
Per Lots .fL •
% of Total
1
2.23
97138.80
13.97%
29396.71
29397
3,61 %
2
2.51
109335.60
15.72%
33087.77
33088
4.06%
3
2.51
109335.60
15.72%
33087.77
33088
4.06%
11
2.10
91476.00
13.15%
27683.00
27683
3.39%
12
4.93
214750.80
30.88%
64989.13
64989
7.97%
13
1.68
73355.04
10.55%
22199.13
22199
2.72 %
Totals
15.95
695391.84
100.00%
210443.50
210444
ECO PARK WETLAND 03
Total Drainage Area 568,458.00
% Impervious 50.0
'Based on lot size
Proposed Impervious Area 284,229.00
Proposed Impervious Area - Streets/Parking 138,481.00
Impervious Area Available for Lots 145,748.00
25.81°� %LOTS
24.19% % ROADS
50.00% %TOTAL
BUA
% x 145748.00
Allowable BUA
Lot #
Acere e
Square Footage
% of total acres e
s .fL
Per Lots .fL •
% of Total
13
2.32
100884.96
22.92 %
33401.18
33401
5.88%
14
1.67
72745.20
16.52%
24084.62
24085
4.24%
15
2.97
129373.20
29.39%
42833.12
42833
7.63%
16
2.97
129373.20
29.39%
42833.12
42833
7.53%
Totals
9.93
432376.66
98,22%
143152.05
143152
25.18%
'Based on lot size
24.36%
49.54%
ECO PARK WETLAND #4
Total Drainage Area 607177.00
% Impervious 50.0
Proposed Impervious Area 302,088.50
Proposed Impervious Area - Streets/Parking 57,064.00
Impervious Area Available for Lots 245,024.50
% x 246024.60
Allowable BUA
Lot #
Acera e
Square Footage
% of total acreage
s .ft.
Per Lots .tL•
% of Total
8
2.53
110206.80
19.87%
48696.94
48697
8.02 %
17
2.97
129373.20
23.33%
57165.97
57166
9.42%
18
2.42
- 105415.20
19.01%
46579.68
46580
7,67%
19
4.81
209523.60
37.78%
92581.92
92582
15.25%
Totals
12.73
554518.80
100.00%
245024.50
245025
40.35%
*Based on lot size
9.40%
49.75%
Page 2 of 3
% LOTS
% ROADS
% TOTAL
BUA
% LOTS
% ROADS
% TOTAL
BUA

ECO PARK
CAMDEN COUNTY
ECO PARK WETLAND LOTS 8 AND 13
Allowable BUA
Total
Lot S
Acera
a
Total Acres
Square Footage
Per Lots .tL •
Allowable BUA
8
1.12
2.53
3.65
158994.00
10745
48697
59442
13
1.68
2.32
4.00
174240.00
22199
33401
55600
Totals
2.80
4.85
7.65
333234.00
32944
82098.00
115042
'Based on lot size
Page 3 of 3

JUN 17 2011
,i
STORMWATER MANAGEMENT PLAN
for
ECO INDUSTRIAL PARK
CAMDEN COUNTY, NORTH CAROLINA
Calculated by: Will Rector, E.I.
Checked by: Dave Richmond, P.E. \���`�N�CAR0�ii,�
. S �i
�. =.�OFE S/�y9 9
= :c. SEAL
OMcGifl 033635
A S S O C I A T E S icy ' c ��' •• ��\
Engineering e Planning • Finance
Post Office Box 1136
Hickory, North Carolina 28603
May 11, 2011

ECO Industrial Park — Camden County, NC
Job No. 10.01411
May 11, 2011
ECO INDUSTRIAL PARK
CAMDEN COUNTY
NARRATIVE
PROJECT DESCRIPTION
The proposed project consists of construction of a proposed entrance boulevard and access drives for
the planned ECO Industrial Park development. The proposed entrance drive will be approximately
2,340 LF and include a raised 18 foot wide median. Two (2) access drives will also be installed and
will be approximately 2130 LF and 1860 LF, respectively looking east to west. The appropriate
storm drainage will be installed which will include road side drainage swales and cross culverts
consisting of double 18" RCP. The site drainage and swales have been designed for the 10-year
storm event per NCDOT standards. Additionally,two of the f ntr(U�4_)proposed stormwater
wetlands eastern side of the 2roject site, will be constructe once the boulev d access drives
have been completed. The stormwater wetlands ha en desi ned for thl!1.5-ivLeh storm event per
the coasta� 1 s�tortn ester regulations for Camden County. The project is located near South Mills,
Camden County, North Carolina adjacent to US-17 N in the northern part of Camden County. The
project does not fall under the Army Corps or CAMA regulations. All efforts will be taken to
minimize and/or eliminate the impact the environmentally sensitive areas (existing wetlands) located
within the site.
Pre -development:
The project site is partially wooded with areas of farming activity on the eastern and western
borders of the property. There is a large —30 acre borrow pit pond located in the middle of the site
that was built as a result for the need of borrow material for the construction of US 17. McGill
Associates has contacted the Army Corps of Engineers and it has been determined that the —30 Acre
pond is not under their jurisdiction. The average cross -slope ranges from 0% - 0.5%.
Post Development:
The post development drainage patterns will remain similar however the site has been broken
up into four quadrants to allow for the proper management of future stormwater runoff. The
stormwater produced by future impervious areas as well as the proposed boulevard and entrance
drives will be treated by the four (4) wetlands. The ultimate build -out of the entire site has been
restricted to 50% lot coverage and will be recorded within the restricted covenants for the —100-acre
property. A mandatory 50' building setback from the edge of the pond will be placed on the plat and
restricted covenants once the final design has been approved. The proposed stormwater wetlands
will be constructed within the 50' setback, with a mandatory setback of 30 feet from the constructed
wetlands to any site improvements. The 50' setback will also include the future construction of a
greenway trail which will meander around the existing borrow pit pond and proposed stormwater
wetlands. The pre -post discharges from the site will be controlled by the existing —30 Acre borrow
pit pond. The calculated storage for the existing pond for ultimate build -out stormwater runoff
produced from the site is equivalent to the 100-year 24-hour storm event.
udky �Q��

ECO Industrial Park — Camden County, NC
Job No. 10.01411
May 11, 2011
BASIS OF DESIGN
Stormwater from the proposed buildings, roads, and parking areas will be captured and controlled
through a series of grass lined drainage swale and cross -culvert consisting of double 18" reinforced
concrete pipe strategically placed throughout the site. No curb and gutter will be constructed for this
project. All stormwater facilities —have —been designed per the NC DWQ standards. The stormwater
facilities will consist of four 4) stormwat wetlands and will include a forebay areas consisting of
deep pools. All forebay have ocated where stormwater runoff will enter the proposed
wetlands. The depth, size, and configuration vary between the four wetlands depending upon their
location and associated drainage area that the stormwater wetland will serve. The main treatment
area of the wetland will include areas of deep pools, shallow water, and shallow land to serve as
areas for specific wetland plants to be planted once construction is complete. The main treatment
areas water surface will be controlled through the use of a flash board riser which has been
incorporated into the over flow spillway.
All stormwater facilities have been designed to treat the�5� depth as required to meet the
Phase II stornwater requirements for the coastal county `regions. It is expected that during normal
weather patterns no runoff will leave the site due to the large capacity of the existing —30 borrow pit
pond (—I00-year storage capacity). Precipitation values, used in the calculations were taken from
NOAA's National Precipitation Frequency Data Server for the City of Hickory area. Each of the
stormwater facilities have a flash board riser control channel and an overflow spillway. The flash
board riser control channel will be constructed from rebar reinforced concrete and be tied directly to
the emergency spillway. The emergency spillway will be will be covered with a permanent turf
reinforcement mattingand be planted with a native grass mix. No constructed vegetative filter has
been designed for the outlet beyond the outlet. The undisturbed buffer surrounding the existing —30
acre pond will be used to dissipate the minimal flows exiting the Stormwater wetland.
All appropriate calculations, supplements, and checklists have been executed per the North Carolina
Division of Water Quality Stormwater Best Management Practices Manual. They are included in
this report.
STORMWATER WETLAND FACILITY
The stormwater wetland facilities have been designed for permanent stormwater quality control. The
stormwater wetlands were selected for their potential ecosystem enhancement ability, lability of
space, and the educational factor for local residents. The nPrmanent Wool elevatio (13' - NAVD
88') has been set at the nd water elevation and corresponds to the water surface elevat of n
observed in the xis ing --30-acre borrow pit pond. ThereforVt
ermanent liner is being required
in the construction: The storage depth for the pond has beenat 1-foot above the permanent pool,
which is the maximum allowable as stated by NCDWQ. Therage capaci o e - cot elevation
ponding depth is equivalent to the runo pro uced from the 1.5-inc \ ainfall event. The stormwater
wetlands have been designed to draw own the 1' of ponded vSiume of stormwater to the permanent
pool elevation by a minimum f 3-day . The design features for the Stormwater Wetland Facilities
have been designed in accorda with Chapter 9, Stormwater Wetlands, of the North Carolina
Division of Water Quality Stormwater Best Management Practices Manual.

ECO Industrial Park — Camden County, NC
Job No. 10.01411
May 11, 2011
STORMWATER MAINTENANCE
The stormwater management facilities shall be maintained by the owner. (See Operation and
Maintenance Agreements.) The facilities shall be checked and maintained on a regular basis.
Repairs and or replacements shall be made as deemed necessary to assure proper performance of all
stormwater management facilities.
Upon completion of the stormwater facilities and prior to final certifications, Operation and
Maintenance Agreements will be provided to the Town of maiden and the Owner for reference.

ECO Industrial Park — Camden County, NC
Job No. 10.01411
May 11, 2011
'TORMWATER MANAGEN
FACILITIES
CALCULATIONS

ECO Industrial Park — Camden County, NC
Job No. 10.01411
May 11, 2011
STORMWATER WETLAND #1
CALCULATIONS

W ATFgpG
y r
O �
CDA STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WETLAND SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all the required information.
I: PROJECT., INFORMATION "-i T `:- a .1. a�._ ,. - � _ i - �_�� - __._`i..>✓ _'�a_k ra�_.�_
Project name ECO-Industrial Park -
Contact name Dave Richmond, P.E.
Phone number 828-328-2024
Date April 21 2011
Drainage area number 1
Site Characteristics
Drainage area
456,073.20 ftz
Impervious area
228,036.60 ftz
Percent impervious
50.0% %
Design rainfall depth
1.50 inch
Peak Flow Calculations
1-yr, 24-hr rainfall depth
in
1-yr, 24-hr intensity
in/hr
Pr --development 1-yr, 24-hr runoff
ft3/sec
welopment 1-yr, 24-hr runoff
ft3lsec
ost 1-yr, 24-hr peak control
ft3/sec
Storage Volume: Non -SA Waters
Minimum required volume
28,505.00 ft3
Volume provided (temporary pool volume) 28,505.00 ft3 OK
Storage Volume: SA Waters Parameters
1.5' runoff volume ft3
Pre -development 1-yr, 24-hr runoff volume ft3
Post -development 1-yr, 24-hr runoff volume ft3
Minimum volume required ft3
Volume provided ft31CAR0
Outlet Design
Depth of temporary pool/ponding depth (DPlar�) 12.00 in OK
Drawdown time 3.00 days OK , 4 SEAL ;
033635
Diameter of orifice 5.00in OK �Q• ow
Coefficient of discharge (Cg) used in orifice diameter 0.10 (unitless) calculationDriving head (Ha) used in the orifice diameter calculation 1.00 ft OK
Form SW401-Wetland-Rev.6.11/16109 Parts I and II. Project Design Summary, Page 1 of 3

Surface Areas of Wetland Zones
Area of Entire Wetland
28,505.00 ft2
OK
u Land
11,402.00 ft2
OK
The shallow land percentage is:
40% %
Shallow Water
11,402.00 ft2
OK
The shallow water percentage is:
40% %
Deep Pool
Forebay portion of deep pool (pretreatment)
2,850.50 ft2
OK
The forebay surface area percentage is:
10% %
Non-forebay portion of deep pool
2,850.50 ft2
OK
The non-forebay deep pool surface area percentage is:
10% %
Total of wetland zone areas
28,505.00 ft2
OK
Add or subtract the following area from the zones
0.00 ft2
Topographic Zone Elevations
Temporary Pool Elevation (TPE)
Shallow Land (top)
14.50 ft amsl
Permanent Pool Elevation (PPE)
Shallow Water/Deep Pool (top)
13.50 ft amsl
Shallow Water bottom
13.00 it amsl
Most shallow point of deep pool's bottom
12.00 ft amsl
Deepest point of deep pool's bottom
10.50 ft amsl
Design must meet one of the following two options:
This design meets Option #1,
y (Y or N)
Top of PPE is within 6" of SHWT, If yes:
SHWT (Seasonally High Water Table)
13.00 ft amsl
OK
This design meets Option #2,
(Y or N)
land has liner with permeability < 0.01 in/hr, If yes:
epth of topsoil above impermeable liner
in
Topographic Zone Depths
Temporary Pool
Shallow Land
12.00 in
OK
Permanent Pool
Shallow Water
6.00 in
OK
Deep Pool (shallowest)
18.00 in
OK
Deep Pool (deepest)
36.00 in
OK
Planting Plan
Are cattails included in the planting plan?
N (Y or N)
OK
Number of Plants recommended in Shallow Water Area:
Herbaceous Wcubic-inch container)
2,900
Number of Plants recommended in Shallow Land Area:
Herbaceous Wcubic-inch container). OR
2,900
Shrubs (1 gallon or larger), OR
464
Trees (3 gallon or larger) and Herbaceous (4+ cubic -inch)
58 and
2,320
Number of Plants provided in Shallow Water Area:
Herbaceous (4'cubic-inch container)
2,900
OK
Number of Plants provided in Shallow Land Area:
Herbaceous Wcubic-inch container)
2,900
OK
Shrubs (1 gallon or larger)
464
OK
Trees (3 gallon or larger) and
Grass -like Herbaceous (4+cubic-inch)
Form SW401-Wetland-Rev.6-11/16/09 Parts I and II. Project Design Summary, Page 2 of 3

Additional Information
C- design volume be contained?
Y
(Y or N)
OK
I ject drain to SA waters? If yes,
N
(Y or N)
Excess volume must pass through filter.
is the length of the vegetated filter?
ft
Are calculations for supporting the design volume provided in the
Y
(Y or N)
OK
application?
Is BMP sized to handle all runoff from ultimate build -out?
Y
(Y or N)
OK
Is the BMP located in a recorded drainage easement with a
Y
(Y or N)
OK
recorded access easement to a public Riqht of Way (ROW)?
The length to width ratio is:
8.04 :1
OK
Approximate wetland length
450.00 It
Approximate wetland width
56.00 ft
Approximate surface area using length and width provided
25,200.00
ftz
This approx. surface area is within this number of square feetof
the entire wetland surface area reported above:
Will the wetland be stabilized within 14 days of construction?
Y
(Y or N)
OK
Form SW401-Wetland-Rev.6-11/16/09 Parts I and II. Project Design Summary, Page 3 of 3

Permit No.
(to be provided by DWQ)
III. -REQUIRED 'ITEMS CHECKLIST m" a`_`:. x z.4.'4
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.
Initials Page/ Plan
Sheet No.
G I o li
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -cut,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Wetland dimensions (and length to width ratio),
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
2. Plan details (1" = 50' or larger) for the wetland showing:
- Wetland dimensions (and length to width ratio)
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Overflow device, and
- Boundaries of drainage easement.
L _5b2
3. Section view of the wetland (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Wetland layers
All wetlands: Shallow land depth, shallow water depth, deep pool depth
Option 1, no clay liner: SLWT depth
Option 2, clay liner: Depth of topsoil on top of liner, liner specifications
Z) 6Q— 502 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing
- A variety of several suitable species (not including cattails),
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
5. A construction sequence that shows how the wetland will be protected from sediment until the entire
drainage area is stabilized.
�
(1
hd.tf.of�`+
6. The supporting calculations (including drawdown calculations).
pb iz
ne�
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
Prkc r-0
8. A copy of the deed restrictions (if required).
9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not
an acceptable source of soils information.
SW401-Wetland-Rev.6-11/16/09 Part III, page 1 of 1

Project:
Camden County: P.U.D. Eco Business Park
Drainage Area:
Drainage Area # 1
Date:
10/11/2010
BMP Type:
Stormwater Wetland
Design Calculations
Drainage Area (DA = Acres):
10.47
Proposed Impervious Area (IR):
50%
Design Storm (RD = Inches):
1.5
Runoff Volume (Simple Method) (ft3)
Rv=0.05+0.9'Iq= 0.50
VRequired (ft3) = 3630 x RD x Rv x DA = 28,505
Required Surface Area (ft2l
Depth (Water) Plants (D,I,gr, = f*1
1.00
SARequired =VRequired (ft3) / Dpi,°r: (ft) =
28,505
Required Wetland Zones (ft z)
Non-Forebay (10% of SAR, „fired)=
2,850
Forebay (10% of SARequired) =
2,850
Low Marsh (40% of SARe mrea) =
11,402
High Marsh (40% of SAR,qui„d) =
11,402
Volume Check
Surface Area Provided (SAPrgwded = ft 3 ) =
28,505
Dpi,,,� (ft) =
1.00
VPrq°iced (ft 3) =
28,505
VRequired (ft 3) =
28,505
Water Quality Outlet Design
User Input
Calculated
[18" - 36" Depth)
(18" - 36" Depth)
3" - 6" Depth)
,Temporary Permanent Pool Depth = Dpi,qu)
Volume Check : Volume Check is Good
Drawdown Time (TDr,w&o n = Days) =
3
oDesi n (cfs) = VPrwided / TDre.d.v =
0.11
Ho = DPiants / 3 =
0.33
A (ft') = 0.60 x 01ev, n x (2gHo)"' =
0.31
Orifice Diameter (Inches) =
5
Planting Requirements (Minimum)
Low Marsh (50 - 4-inch container per 200 ft):1 2,850 (4 - inch' Container Plants on 2400t centers)
High Marsh (50 - 4-inch container per 200 ft'):l 2,850 (4 - inch' Container Plants on 2-foot centers)
[Can be substituted for 8 (1-gallon) Shrubs on 5 ft centers
OR 1 (3-gallon) Tree and 40 (4-inch') Container Plants; all
per 200 W]

ECO Industrial Park— Camden County, NC
Job No. 10.01411
May 11, 2011
STORMWATER WETLAND #2
CALCULATIONS

AA o20p W A7' 9;q
/�i
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WETLAND SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all the required information.
Project name
Contact name
Phone number
Date
Drainage area number
Dave
April2l 2011
2
II..,DESIGN,'INFORMATION ai"�-` :
Site Characteristics
Drainage area
Impervious area
Percent impervious
Design rainfall depth
Peak Flow Calculations
1-yr, 24-hr rainfall depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr runoff
r velopment 1-yr, 24-hr runoff
F, st 1-yr, 24-hr peak control
Storage Volume: Non -SA Waters
Minimum required volume
Volume provided (temporary pool volume)
Storage Volume: SA Waters Parameters
1.5' runoff volume
Pre -development 1-yr, 24-hr runoff volume
Post -development 1-yr, 24-hr runoff volume
Minimum volume required
Volume provided
Outlet Design
Depth of temporary pool/ponding depth (DPu.u)
Drawdown time
Diameter of orifice
Coefficient of discharge (Co) used in orifice diameter
calculation
Driving head (H.) used in the orifice diameter calculation
815,443.00 ftz
407,721.50 ftz
50.0% %
1.50 inch
in
in/hr
ft3/sec
ft3/sec
ft3/sec
50,965.20 ft3
50,965.20 ft3 OK
ft3
ft3
ft3
ft3
ft3
12.00 in OK
3.00 days OK
8.00 in OK
0.10 (unitless)
1.00 ft OK
CAR0ii���
:ae SEAL
033635 .
Form SW401-Wetland-Rev.6-11/16/09 Parts I and II. Project Design Summary, Page 1 of 3

�11il;�ifU/j�
� ,i.�''11�� Fr."'
�C. 5 �I.
.. i'G:� `
Si\ V��
::��}7 �•
'! atl�'.',. ,

Surface Areas of Wetland Zones
f Area of Entire Wetland
50,965.20 ft2
OK
S. ./ Land
20,386.08 ft'
OK
The shallow land percentage is:
40% %
Shallow Water
20,386.08 ft2
OK
The shallow water percentage is:
40% %
Deep Pool
Forebay portion of deep pool (pretreatment)
5,096.52 ft2
OK
The forebay surface area percentage is:
10% %
Non-forebay portion of deep pool
5,096.52 ft2
OK
The non-forebay deep pool surface area percentage is:
10% %
Total of wetland zone areas
50,965.20 ft2
OK
Add or subtract the following area from the zones
0.00 ft2
Topographic Zone Elevations
Temporary Pool Elevation (TPE)
Shallow Land (top)
14.50 ft amsl
Permanent Pool Elevation (PPE)
Shallow Water/Deep Pool (top)
13.50 ft amsl
Shallow Water bottom
13.00 ft amsl
Most shallow point of deep pool's bottom
12.00 ft amsl
Deepest point of deep pool's bottom
10.50 ft amsl
Design must meet one of the following two options:
This design meets Option #1,
Y (Y or N)
Top of PPE is within 6" of SHWT, If yes:
SHWT (Seasonally High Water Table)
13.00 ft amsl
OK
This design meets Option #2,
(Y or N)
and has liner with permeability < 0.01 in/hr, If yes:
:pth of topsoil above impermeable liner
in
Topographic Zone Depths
Temporary Pool
Shallow Land
12.00 in
OK
Permanent Pool
Shallow Water
6.00 in
OK
Deep Pool (shallowest)
18.00 in
OK
Deep Pool (deepest)
36.00 in
OK
Planting Plan
Are cattails included in the planting plan?
N (Y or N)
OK
Number of Plants recommended in Shallow Water Area:
Herbaceous Wcubic-inch container)
5,100
Number of Plants recommended in Shallow Land Area:
Herbaceous (Ccubic-inch container), OR
5,100
Shrubs (1 gallon or larger), OR
816
Trees (3 gallon or larger) and Herbaceous (4+ cubic -inch)
102 and
4,080
Number of Plants provided in Shallow Water Area:
Herbaceous (4'cubic-inch container)
5,100
OK
Number of Plants provided in Shallow Land Area:
Herbaceous Wcubic-inch container)
5,100
OK
Shrubs (1 gallon or larger)
816
OK
Trees (3 gallon or larger) and
Grass -like Herbaceous (4+ cubic -inch)
Form SW401-Wetland-Rev.6-11/16/09 Parts I and II. Project Design Summary, Page 2 of 3

Additional Information
C- `9 design volume be contained?
Y
(Y or N)
OK
oject drain to SA waters? If yes,
N
(Y or N)
Excess volume must pass through filter.
vwat is the length of the vegetated filter?
fl
Are calculations for supporting the design volume provided in the
Y
(Y or N)
OK
application?
Is BMP sized to handle all runoff from ultimate build -out?
Y
(Y or N)
OK
Is the BMP located in a recorded drainage easement with a
Y
(Y or N)
OK
recorded access easement to a public Right of Way (ROW)?
The length to width ratio is:
12.10 :1
OK
Approximate wetland length
847.00 ft
Approximate wetland width
70.00 It
Approximate surface area using length and width provided
59,290.00 It
This approx. surface area is within this number of square feet
of the entire wetland surface area reported above:
Will the wetland be stabilized within 14 days of construction?
Y
(Y or N)
OK
Form SW401-Wetland-Rev.6-11/16/09 Parts I and II. Project Design Summary, Page 3 of 3

Permit No.
(to be provided by DWI
III REQUIREf) ITEMSiCHECKLrI§T€ " s� sa's"� �i-I,b +b ^'1,
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.
Initials Page/ Plan
Sheet No.
E)139- G I o 1 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),
- Wetland dimensions (and length to width ratio),
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
2.
Plan details (1" = 50' or larger) for the wetland showing:
- Wetland dimensions (and length to width ratio)
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Overflow device, and
- Boundaries of drainage easement.
—5 r5Z 3.
Section view of the wetland (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Wetland layers
All wetlands: Shallow land depth, shallow water depth, deep pool depth
Option 1, no clay liner: SLWT depth
Option 2, clay liner: Depth of topsoil on top of liner, liner specifications
�i3tL C_ 502 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing:
- A variety of several suitable species (not including cattails),
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
2 G' 103 5. A construction sequence that shows how the wetland will be protected from sediment until the entire
drainage area is stabilized.
R �dfo'f�i 6. The supporting calculations (including drawdown calculations).
eb 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
V PA lG neti 8. A copy of the deed restrictions (if required).
13'(2� AAkW 9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not
an acceptable source of soils information.

Project: Camden County: P.U.D. Eco Business Park
Drainage Area: Drainage Area If 2
Date: 10/11/2010
BMP Type: Stormwater Wetland
Design Calculations
Drainage Area (DA = Acres):.
,. 18:72
Proposed Impervious Area (IA):
'50%
Design Storm (RD = Inches):
1 1.5
Runoff Volume (Simple Method) (ft 3)
Rv=0.05+0.9*IA=
0.50
VRequlred (ft) =3630xRrxR,xDA=l
50,965
Required Surface Area (ft2)
Depth (Water) Plants (DPI,,,,,=ft): 1.00
SARe cored = VReouired (ft) / DPI,,,t, (ft) = 50,965.20
Required Wetland Zones (ftZ
Non-Forebay (10% of SAR,Ruired) =
5,096.52
Forebay (10%of SAR,quir,d) =
5,096.52
Low Marsh (40%of SAReQuir,d) =
20,386.08
High Marsh (40%of SARequired) =
20,386.08
Volume Check
Surface Area Provided (SAI,mded = ft3) =
50,965
DPI."u (ft) =
1.00
VP,.V,&d (ft 3) =
50,965
VR,.I,.d (ft 3) =
50,965
Water Quality Outlet Design
815443.2 User input
Calculated
(18" - 36" Depth)
(18" - 36" Depth)
(3" - 6" Depth)
(Temporary Permanent Pool Depth = DPI,,,t,)
Volume Check : Volume Check is Good
Drawdowln Time (T,,,wdew,� = Days) =
3
ll
`Design (cfs) = VPr vVded / TD.wd.w =
0.20
H. = DPl.nt / 3 =
0.33
A (ft') = 0.60 x %eM, x (2gH,)11= =
0.55
Orifice Diameter (inches) =
8
Planting Requirements (Minimum)
Low Marsh (50 - 4-inch container per 200 ft4):l 5,097 (4 - inch' Container Plants on 2-foot centers)
High Marsh (50 - 4-inch container per 200 ft): 1 5,097 (4 - inch' Container Plants on 2-foot centers)
[Can be substituted for 8 (1-gallon) Shrubs on 5 ft
centers OR 1 (3-gallon) Tree and 40 (4-inch') Container
Plants; all per 200 ft2]

ECO Industrial Park —Camden County, NC
Job No. 10.01411
May 11, 2011
STORMWATER WETLAND #3
CALCULATIONS

AOCDA
01p W A 7E9PG
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WETLAND 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 the required information
I. PROJECT- INFORMATION
Project name ECO-Industrial Park I,
Contact name Dave Richmond, P.E.
Phone number 828-328-2024
Date
Drainage area number
21.2011
IL DESIGN, INFORMATION
Site Characteristics
Drainage area
568,458.00 ftz
Impervious area
284,229.00 ftz
Percent impervious
50.0% %
Design rainfall depth
1.50 inch
Peak Flow Calculations
1-yr, 24-hr rainfall depth
in
1-yr, 24-hr intensity
in/hr
Pre -development 1-yr, 24-hr runoff
ft�/sec
'velopment 1-yr, 24-hr runoff
ft�/sec
A 1-yr, 24-hr peak control
ft�/sec
Storage Volume: Non -SA Waters
Minimum required volume
35,529.00 ft3
Volume provided (temporary pool volume)
35,529.00 ft3 OK
Storage Volume: SA Waters Parameters
1.5" runoff volume
W
Pre -development 1-yr, 24-hr runoff volume
W
Post -development 1-yr, 24-hr runoff volume
It
Minimum volume required
W
Volume provided
W
Outlet Design
��N ! C ARO
'FESS/ �y
Depth of temporary pool/ponding depth (Dp1 tJ
12.00 in OK
�� pQ •
_
�q 9
Drawdown time
3.00 days OK
• Q�
— ;a SEAL �.
Diameter of orifice
6.00in OK
— 033635 =
GI
Coefficient of discharge (Co) used in orifice diameter
0.10 (unitless)
��9L NE •' ��
calculation
Driving head (Ho) used in the orifice diameter calculation
1.00 ft OK
Lo
Form SW401-Wetland-Rev.6.11/16/09 Parts I and II. Project Design Summary, Page 1 of 3

10

Surface Areas of Wetland Zones
Area of Entire Wetland
35,529.00 ft2
OK
/ Land
14,211.00 ft2
OK
The shallow land percentage is:
40% %
Shallow Water
14,211.00 ft'
OK
The shallow water percentage is:
40% %
Deep Pool
Forebay portion of deep pool (pretreatment)
3,553.00 ft2
OK
The forebay surface area percentage is:
10% %
Non-forebay portion of deep pool
3,553.00 ftz
OK
The non-forebay deep pool surface area percentage is:
10% %
Total of wetland zone areas
35,528.00 ft2
Enter data into the shaded cells in this section.
Add or subtract the following area from the zones
-1.00 ft2
Topographic Zone Elevations
Temporary Pool Elevation (TPE)
Shallow Land (top)
14.50 ft amsl
Permanent Pool Elevation (PPE)
Shallow Water/Deep Pool (top)
13.50 ft amsl
Shallow Water bottom
13.00 ft amsl
Most shallow point of deep pool's bottom
12.00 ft amsl
Deepest point of deep pool's bottom
10.50 It amsl
Design must meet one of the following two options:
This design meets Option #1,
Y (Y or N)
Top of PPE is within 6" of SHWT. If yes:
SHWT (Seasonally High Water Table)
13.00 ft amsl
OK
This design meets Option #2,
(Y or N)
"and has liner with permeability < 0.01 in/hr, If yes:
�pth of topsoil above impermeable liner
in
Topographic Zone Depths
Temporary Pool
Shallow Land
12.00 in
OK
Permanent Pool
Shallow Water
6.00 in
OK
Deep Pool (shallowest)
18.00 in
OK
Deep Pool (deepest)
36.00 in
OK
Planting Plan
Are cattails included in the planting plan?
N (Y or N)
OK
Number of Plants recommended in Shallow Water Area:
Herbaceous (4'cubic-inch container)
3,600
Number of Plants recommended in Shallow Land Area:
Herbaceous (4'cubic-inch containerl. OR
3,600
Shrubs (1 gallon or larger), OR
576
Trees (3 gallon or larger) and Herbaceous (4+ cubic -inch)
72 and
2,880
Number of Plants provided in Shallow Water Area:
Herbaceous (4'cubic-inch container)
3,600
OK
Number of Plants provided in Shallow Land Area:
Herbaceous (4'cubic-inch container)
3,600
OK
Shrubs (1 gallon or larger)
576
OK
Trees (3 gallon or larger) and
Grass -like Herbaceous (4+ cubic -inch)
Form SW401-Wetland-Rev.6-11/16/09 Parts I and II. Project Design Summary, Page 2 of 3

Additional Information
r �e design volume be contained?
Y
(Y or N)
OK
roject drain to SA waters? If yes,
N
(Y or N)
Excess volume must pass through filter.
..net is the length of the vegetated filter?
ft
Are calculations for supporting the design volume provided in the
Y
(Y or N)
OK
application?
Is BMP sized to handle all runoff from ultimate build -out?
Y
(Y or N)
OK
Is the BMP located in a recorded drainage easement with a
Y
(Y or N)
OK
recorded access easement to a public Right of Way (ROW)?
The length to width ratio is:
12.77 :1
OK
Approximate wetland length
715.00 ft
Approximate wetland width
56.00 ft
Approximate surface area using length and width provided
40,040.00
flz
This approx. surface area is within this number of square feet
of the entire wetland surface area reported above:
Will the wetland be stabilized within 14 days of construction?
Y
(Y or N)
OK
Form SW401-Wenand-Rev.6-1 vi 6/09 Parts I and 11. Project Design Summary, Page 3 of 3

Permit No.
(to be provided by DWQ)
III.FiREQUIREDIITEMSiCHECKLIST =-
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.
Initials
Pagel Plan
Sheet No.
G I o I
1. Plans (V - 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),
- Wetland dimensions (and length to width ratio),
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
D H
2. Plan details (V = 50' or larger) for the wetland showing:
- Wetland dimensions (and length to width ratio)
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Overflow device, and
- Boundaries of drainage easement.
L —562
3. Section view of the wetland (1' = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Wetland layers
All wetlands: Shallow land depth, shallow water depth, deep pool depth
Option 1, no clay liner: SLWT depth
Option 2, clay liner: Depth of topsoil on top of liner, liner specifications
�Ci2
�^ 5D2
4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing:
- A variety of several suitable species (not including cattails),
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
5. A construction sequence that shows how the wetland will be protected from sediment until the entire
drainage area is stabilized.
Re Pof
6. The supporting calculations (including drawdown calculations).
�e�
7. A copy of the signed and notarized operation and maintenance (O&M) agreement.
P&&t
8. A copy of the deed restrictions (if required).
� �
A60
9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not
an acceptable source of soils information.

Project:
Camden County: P.U.D. Eco Business Park
Drainage Area:
Drainage Area # 3
Date:
10/11/2010
BMP Type:
Stormwater Wetland
Design Calculations
Drainage Area (DA = Acres):
13.05
Proposed Impervious Area (Ip):
50%
Design Storm (RD = Inches):
1.5
Runoff Volume (Simple Method) (ft)
Rv=0.05+0.9'Ip=
0.50
VR,q i,ed (ft)= 3630 x RD x Rv x DA =
35,529
Required Surface Area (ft')
Depth (Water) Plants (DPI,,,=ft):
1 1.00
SARequired = VRequlred (ft) / DpI.,, (ft) =1
35,528.63
Required Wetland Zones (ft')
Non-Forebay (10% of SARa ,ired) =
3,553
Forebay (10% of SARaqulrad) =
3,553
Low Marsh (40% of SARequlred) =
14,211
High Marsh (40% of SARequlred) =
14,211
Volume Check
Surface Area Provided (SAPrgydgd = ft3) =
35,529
DPl,nb (ft)
VPr.vIded (ft 3) =
35,529
3
VRegmree (ft) =
35,529
Water Quality Outlet Design
568458 Useringut
Calculated
(18" - 36" Depth)
(18" - 36" Depth)
(3" - 6" Depth)
(Temporary Permanent Pool Depth = DII,na)
Volume Check: Volume Check is Good
Drawdown Time (TDrawdgwn = Days) =
3
w
`♦Design (Cfs) = VPmNded / TD.a d.x =
O.14
Ho = DPlenu / 3 =
0.33
A (ft') = 0.60 x ODe,lgn x (2gHo)1,' =
0.38
Orifice Diameter (inches) =
6
Planting Requirements (Minimum)
Low Marsh (50 - 4-inch container per 200 ft`): 3,553 (4 - inch' Container Plants on 2-foot centers)
High Marsh (50 - 4-inch container per 200 ft'): 3,553 (4 - inch Container Plants on 2-foot centers)
[Can be substituted for 8 (1-gallon) Shrubs on 5 ft
centers OR 1 (3-gallon) Tree and 40 (4-inch') Container
Plants; all per 200 ft']

ECO Industrial Park — Camden County, NC
Job No. 10.01411
May 11, 2011
STORMWATER WETLAND #4
CALCULATIONS

CD
020E WATE9PG
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WETLAND 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 the required information.
I. PROJECT INFORMATION:
Project name ECOlndustrial Park
Contact name
Phone number
Date
Drainage area number
2011
II.�'-DESIGNINFORMATION ::•:.; , , , r:.r;p " rS.„:° r 1 _"1c Ya;rr . ` _1 n.;.`.:' 4.... d_ . ! 1'_.. 'xas .t
Site Characteristics
Drainage area
604,177.00 ft2
Impervious area
302,088.50 ft2
Percent impervious
50.0% %
Design rainfall depth
1.50 inch
Peak Flow Calculations
1-yr, 24-hr rainfall depth
in
1-yr, 24-hr intensity
in/hr
Pre -development 1-yr, 24-hr runoff
ft3/sec
r 'evelopment 1-yr, 24-hr runoff
ft3/sec
it 1-yr, 24-hr peak control
ft3lsec
Storage Volume: Non -SA Waters
Minimum required volume
37,761.08 ft3
Volume provided (temporary pool volume)
37,761.08 ft3 OK
Storage Volume: SA Waters Parameters
1.5" runoff volume
rya
Pre -development 1-yr, 24-hr runoff volume
ft3
Post -development 1-yr, 24-hr runoff volume
ft3
Minimum volume required
ft3
Volume provided
ft3
Outlet Design
Depth of temporary pool/ponding depth (DPis,tJ
12.00 in
OK
Drawdown time
3.00 days
OK
Diameter of orifice
6.00 in
OK
Coefficient of discharge (CD) used in orifice diameter
0.10 (unitless)
calculation
Driving head (Ho) used in the orifice diameter calculation
1.00 ft
OK
1CARO
\�2OFEss/p
4 SEAL
033635 =
INIC
Ede �O
1
b-15'k4
Form SW401-Wetland-Rev.611/16/09 Parts I and II. Project Design Summary, Page 1 of 3

,,
:.r,
-.
T`�-'�-
_
ti��
�
r•�
s ^-
�'
-�
;j
�'': _
ti_:
.
. "�.'

Surface Areas of Wetland Zones
Area of Entire Wetland
37,761.08 ft'
OK
Land
15,104.43 ft'
OK
The shallow land percentage is:
40% %
Shallow Water
15,104.43 ft'
OK
The shallow water percentage is:
40% %
Deep Pool
Forebay portion of deep pool (pretreatment)
3,776.11 ft'
OK
The Forebay surface area percentage is:
10% %
Non-forebay portion of deep pool
3,776.11 ff'
OK
The non-forebay deep pool surface area percentage is:
10% %
Total of wetland zone areas
37,761.08 ft'
OK
Add or subtract the following area from the zones
0.00 ft'
Topographic Zone Elevations
Temporary Pool Elevation (TPE)
Shallow Land (top)
14.50 ft amsl
Permanent Pool Elevation (PPE)
Shallow Water/Deep Pool (top)
13.50 It amsl
Shallow Water bottom
13.00 ft amsl
Most shallow point of deep pool's bottom
12.00 ft amsl
Deepest point of deep pool's bottom
10.50 ft amsl
Design must meet one of the following two options:
This design meets Option #1,
Y (Y or N)
Top of PPE is within 6" of SHWT, If ves:
SHWT (Seasonally High Water Table)
13.00 it amsl
OK
This design meets Option #2,
(Y or N)
'and has liner with permeability < 0,01 in/hr, If ves:
,epth of topsoil above impermeable liner
in
Topographic Zone Depths
Temporary Pool
Shallow Land
12.00 in
OK
Permanent Pool
Shallow Water
6.00 in
OK
Deep Pool (shallowest)
18.00 in
OK
Deep Pool (deepest)
36.00 in
OK
Planting Plan
Are cattails included in the planting plan?
N (Y or N)
OK
Number of Plants recommended in Shallow Water Area:
Herbaceous Wcubic-inch container)
3,800
Number of Plants recommended in Shallow Land Area:
Herbaceous Wcubic-inch container). OR
3,800
Shrubs (1 gallon or larger), OR
608
Trees (3 gallon or larger) and Herbaceous (4+ cubic -inch)
76 and
3,040
Number of Plants provided in Shallow Water Area:
Herbaceous (4'cubic-inch container)
3,800
OK
Number of Plants provided in Shallow Land Area:
Herbaceous Wcubic-inch container)
3,800
OK
Shrubs (1 gallon or larger)
608
OK
Trees (3 gallon or larger) and
Grass -like Herbaceous (4+ cubic -inch)
Form SW401-Wetland-Rev.6-11116109 Parts I and II. Project Design Summary, Page 2 of 3

Additional Information
Can the design volume be contained?
Y
(Y or N)
OK
I) •oject drain to SA waters? If yes,
N
(Y or N)
Excess volume must pass through filter.
is the length of the vegetated filter?
ft
Are calculations for supporting the design volume provided in the
Y
(Y or N)
OK
application?
Is BMP sized to handle all runoff from ultimate build -out?
Y
(Y or N)
OK
Is the BMP located in a recorded drainage easement with a
Y
(Y or N)
OK
recorded access easement to a public Riqht of Way (ROW)?
The length to width ratio is:
9.15 :1
OK
Approximate wetland length
650.00 ft
Approximate wetland width
71.00 ft
Approximate surface area using length and width provided
46,150.00
fit'
This approx. surface area is within this number of square feetof
the entire wetland surface area reported above:
Will the wetland be stabilized within 14 days of construction?
Y
(Y or N)
OK
Form SW401-Wetland-Rev.6-11/16/09 Parts I and It. Project Design Summary, Page 3 of 3

Permit No.
(to be provided by DWQ)
IIIREQUIREDhTEMSCFiECKLIST' ter'"" �hd3s't'rd�xk*"
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.
Initials Pagel Plan
Sheet No.
Dc32� G 10 1
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),
- Wetland dimensions (and length to width ratio),
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
2. Plan details (1" = 50' or larger) for the wetland showing:
- Wetland dimensions (and length to width ratio)
- Pretreatment system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Overflow device, and
- Boundaries of drainage easement.
L —562 3. Section view of the wetland (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Wetland layers
All wetlands: Shallow land depth, shallow water depth, deep pool depth
Option 1, no clay liner: SLWT depth
Option 2, clay liner: Depth of topsoil on top of liner, liner specifications
06 fL C 502 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing:
- A variety of several suitable species (not including cattails),
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
T2 L l 03 5. A construction sequence that shows how the wetland will be protected from sediment until the entire
drainage area is stabilized.
VNe.Pof'­I1r
11 6. The supporting calculations (including drawdown calculations).
Siva - ftjWkCa 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
D (91Z, Pr4ttC1\4 8. A copy of the deed restrictions (if required).
Jb✓3_V� AiJAbLJ 9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not
an acceptable source of soils information.

Project:
Camden County: P.U.D. Eco Business Park
Drainage Area:
Drainage Area # 4
Date:
10/11/2010
BMP Type:
Stormwater Wetland
Desien Calculations
Drainage Area (DA = Acres):
1387
Proposed Impervious Area (IA):
50%
Design Storm (RD = Inches):
1.5
Runoff Volume (Simple Method) (ft 3)
Rt,=0.05+0.9'Iq=
0.50
VRegalred (ft 3) = 3630 x RD x Rv x DA =
37,761.08
Required Surface Area (ft)
Depth (Water) Plants (DPient,=ft): 1.00
6ARequired = Vaegm,ed (ft) / DPlaats (ft) = 137,761.08
Required Wetland Zones (ft2)
Non-Forebay (10% of SAReq,lred) =
3,776.11
Forebay (10% of SAReq„ I,ed) =
3,776.11
Low Marsh (40% of SARequl,ed) =
15,104.43
High Marsh (40% of SAR,,,i,ed) =
15,104.43
Volume Check
Surface Area Provided (SAP,ovided = ft) =
37,761
DPlaats (ft) =
1.00
VProvided (ft 3) =
37,761
VRe cored (ft3) =
37,761
Water Quality Outlet Design
604177.2 User Input
Calculated
(18" - 36" Depth)
(18" - 36" Depth)
(3" - 6" Depth)
(Temporary Permanent Pool Depth = DPlent,)
Volume Check: Volume Check is Good
Drawwdown Time (TDne down = Days) =
3
`;Design (cfs) = VPraNded / TDrawdown =
0.15
Ho = DPlaats / 3 =
0.33
A(ft')= 0.60 X%,,I, X(2911J"z=
0.40
Orifice Diameter (Inches) =
6
Planting Requirements (Minimum)
Low Marsh (50 - 4-inch container per 200 ft'):1 3,776 (4 - inch Container Plants on 2-foot centers)
High Marsh (50 - 4-inch container per 200 ft'):l 3,776 (4 - inch Container Plants on 2-foot centers)
[Can be substituted for 8 (1-gallon) Shrubs on 5 ft
centers OR 1 (3-gallon) Tree and 40 (4-inch') Container
Plants; all per 200 ft']

ECO Industrial Park — Camden County, NC
Job No. 10.01411
May 11, 2011
MISCELLANEOUS
CALCULATIONS
and
APPENDIX

4/25/2011 Precipitation Frequency Data Server
NOAA Atlas 14, Volume 2, Version 3
LoraBon name: North Carolina US'
Coordinates: ion: 13, -76.3616 i
source on: 19 fr
• source Google Maps
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, T. Paaybok M Yeka, and 0. Riley
NOAA, National Weather service, Silver Spring, Maryland
PF tabular i PF graphical i Maps 8 aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inchesRlour)1
recurrence
rrence
interval
(years)
Duration
��00
200
500
1000
Overage
25
01
100
11.1
11.9
12.9
13.9
5-min
5.44
(4.94-6.00)
6.38
(S.BO-704)
7.22
(6.55-7.98)
8.24
(7.45-9.10)
9.29
(8.36-10.2)
10.2
(9.17-11.3)
(9.88-12.2)
(10.6-13.1)
(11.4-14.3)
(12.2-15.5)
8.79
9.44
10.2
11.0
10-min
4.34
(3.95.4.79)
5.10
(4.63-5.63)
5.78
(5.25-6.39)
6.59
(5.96-7.28)
7.a0
(6.66-8.16)
8.13
(7.30-8.96)
(7.B5-9.70)
(8.38-t0.4)
(9.01-11.3)
(9.58-12.2)
7.41
7.94
8.59
9.19
15-min
3.62
(3.29-3.99)
4.28
(3.88-4.72)
4.88
(4.425.39)
5.56
(5.03-6.14)
6.26
(5.63-6.89)
6.86
(6.16-7.56)
(6.61-8.17)
(7.04.876)
(7.56.9.50)
(8.01-10.2)
6.18
6.83
7.44
30-MIA
2.48
(2.26-273)
2.95
(2.68.3.26)
3.46
(3.14-3.83)
4.03
(3.64-4.45)
4.63
(4.17-5.11)
5.17
1 (4.64.5.70)
5.67
(S.Ofi-6.26)
(5.48-6.82)
(6.01.7.56)
(6.49-8.24)
4.33
47
5.43
60-min
1.55
(t.41-1.71)
1.85
(1.68.2.04)
2.22
(2.02-2.45)
2.62
(2.37-2.90)
3.08
(2.78-3.40)
3.50
(3.14-3.86)
3.91
(3,49.4.31)
(3.85-4.78)
(4,31-5.42)
(4.74-6.02)
2.50
2.81
3.24
3.65
2-hr
0.902
1.08
1.32
1.59
1.90
2.20
(0.814.1.00)
(0.976-1.20)
(t79-1.47)
(1.43-1.76)
(1.70-2.11)
(1.96-2.43)
(2.21-2.76)
(2.47-3.11)
(2.82-3.59)
(3.15A.04)
2.13
2.49
2.84
3-hr
0.646
0.775
0.950
1.15
1.39
1.63
1.87
(0.581-0.723)
(0.69fi-0.867)
(0.853-1.06)
(1.03-1.28)
(1.24-1.55)
(1.44-iB1)
(1.64-2.07)
(1.85.2.36)
(2.15.2.76)
(2.42-3.15)
1.30
1.53
1.75
�6-hr
0.389
0.465
0.572
0.693
0.844
0.989
1.14
(0.350-0.435)
(0.419.0.521)
(0.513-0,640)
(0.619-0.774)
(0.750.0.940)
(0.874-1.10)
(0.997-t26)
(1.13-1.44)
(1.31-1.70)
(1.49-L95)
0.686
0.791
0.939
1.08
�12-hf
0.227
0.272
0.336
0.409
0.501
0.592
(0.204-p255)
(0.243.0.306)
(0.300-0.377)
(0.363-0.459)
(0442-0.560)
(0.519-0.661)
(0.595-0.764)
(0.679.O.B80)
(0.795-1.05)
(0.905-1.21)
0.399
0.458
0.546
0.621
�24-hf
0.128
0.156
0.202
0.240
0.296
0.345
(0.118-0.140)
(0.144-0.171)
(0.185-0.220)
(0.220-0.262)
(0.270-0.323)
(0.311-0.375)
(0.356-0.433)
(0.404.0.498)
(0.474-0.596)
(0.531-0.681)
0.232
0.268
0.322
0.369
2aay
0.075
(0.069-0.082)
0.091
(0.084-0.099)
0.116
(0.108.0.127)
0.139
(0.127-0.15t)
0.172
(0.157-0.186)
0.200
(0.181-0.217)
(0.208-0.252)
(0.236.0.292)
(0.279.0.352)
(0.313-0.405)
0.160
0.183
0.218
0.249
3-day
0.053
(0.049.0.058)
0.064
(0.060.0.070)
0.082
(0.076-0,089)
0.098
(0.090-O.t05)
0.120
(0.110.0.129)
0.139
(0.126-0.150)
(0.144-0,173)
(0.163-0,198)
(0.190-0.237)
(0.214-0.273)
0.124
0.141
0.166
0.189
4-day
0.042
0.051
0.065
0.077
0.094
0.108
(0.040.0.046)
(0.048-0.055)
(0.061-0.070)
(0.071-0.083)
(0.087-0.10t)
(0.099-0.116)
(0.112-0.133)
(O.t26-0.152)
(0.148-0.180)
(0.164-0.207)
0.079
0.090
0.104
0.117
7-day
0.029
0.034
0.04J
0.051
0.061
0.070
(0.027.0.031)
(0.032-0.037)
(0.040-0.046)
(0.047.0.054)
(0.056-0.065)
(0.064-0.075)
(0.072.0.085)
(0.081-0.096)
(0.092-0.113)
(0.102-0.127)
0.060
0.011
0.078
1.087
10-day
0.023
0.027
0.134
0.039
0.047
0.053
(0.021.0.024)
(0,026-0.029)
(0.032-0.036)
(0.037-0.042)
(0.044.0.050)
(0.049-0.057)
(0.055-0.064)
(0.061-0.072)
(0.070-O.OB4)
(0.077-0.094)
0.030
0.034
0.038
0.042
0.048
0.053
20-day
0.015
(0.015-0.016)
0.018
(0.017-0.020)
0.022
(0.021-0.024)
0.026
(0.024.0.027)
(0.028-0.032)
(0.032-0.036)
(0.035-0.040)
(0.038-0.045)
(0.043-0.052)
(0.047-0.0$7)
0.032
0.036
0.039
30-da
0.013
0.015
0.018
0.021
0.024
0.027
0.029
(0.012-0.013)
(0.014-0.016)
(0.017-0.019)
(0.019A.022)
(0.022-0.025)
(0.025-0.028)
(0.027-0.031)
(0.030-0.034)
(0.033-0.039)
(0.035-0.042)
0.02z
0.024
9.027
O.O30
0.033
45-day
Q.o11
0.012
0.015
0.017
Q.ozo
(0.010-0.011)
(0.012.0.013)
(0.014.0.016)
(0.016-0.018)
(0.019-0.021)
(0.021-0.023)
(0.023-0.026)
(0.025.0.029)
(0.028-0.032)
(0.030-0.036)
0.021
0.022
0.025
0.027
60-day
0.009
0.017
0.013
O.o15
0.017
0.019
(0.0090.010)
(0.011.0.012)
(0.013-0.014)
(0.014-0.016)
(O.Ot6-0018)
(0018-0.020)
(0.079-0.022)
(0.021-0.024)
(0.023-0.027)
(Q.Q24-0.029)
1 Precipitation frequency (Ph7 estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90 %confidence interval. The probability that precipitation frequency estimates (for a
given duration and average recurrence interval) will be greater than the upper bound (or less than the low er bound) is 5%. Estill at upper bounds are not
checked against probable rneximunt precipitation (PMP) estimates and mey be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 docunent for mare inforrmtion.
..noaa.gov/hdsc/.../pfds_printpage.ht... 1/4

4/25/2011 Precipitation Frequency Data Server
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PF graphical
PDS-based intensity -duration -frequency (IDF) curves
Coordinates: 36.5203,-76.3616
100.000
10.000
: :...:.....:.....J......:. _..:
. ................
_.:....._:_.:_....:._:...:.
1.000
°1
J
0.100
.....
.... - ...:...........:.... _.................
':..
.............
a
'u
y
.
0.001
E
E.� E 'E Hifi � L a
4yynyym
�n
m ?. T
V99m
o
Duration
100.000
IC 10.000
� 1000
c
0.100
8
S
u
0.010
0.001
1000
1 2
5
10
25
50
100
200
Soo
Average recurrence interval (years)
NOAA/NWS/OHD/HDSC Created (GMT): Mon Apr 25 15:50:37 2011
Average recunance
aeernal
(years)
— 1
2
5
10
25
50
100
— 200
Soo
1000
Duration
---- 5- ,n
— 2-day
— Iern
— 3-day
15+
— 4-day
— 704M
— 7-day
— 60-M
— 10-0ay
— 2fir
— 20-day
— 3-hr
— 3"ay
— 6-nr
— 45-day
— 12-hr
— 60-day
— 24 hr
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4/25/2011
Precipitation Frequency Data Server
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Maps & aerials
Small scale terrain
terrain
...noaa.gov/hdsc/.../pfds_printpage.ht... 3/4

4/25/2011 Precipitation Frequency Data Server
C•_L Dismal SWarnp Ts' Wa ®2011 Google -Terms of Use
arge scale map
1T
l ..
� Dismal Swamp 17 -
State Park
Map data,®2011 Google - Terms of Use
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US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Office of Hydrologic Development
1325 East West Highway
Silver Spring, MD 20910
Questions?: HDSC.Quesfionsanoaa.gov
Disclaimer
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