SW8140906_Historical File_20141014

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NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
October 14, 2014
LTC Rodney Newton
State of North Carolina through the NC Dept. of Public Safety, NC National Guard
1636 Gold Star Dr.
Raleigh, NC 27607
Subject: Stormwater Management Permit No. SW8140906
Wilmington Readiness Center Renovation North Carolina National Guard
High Density Commercial Infiltration Basin Project
New Hanover County
Dear LTC Newton:
John E. Skvada, III
Secretary
The Wilmington Regional Office received a complete State Stormwater Management Permit Application for Wilmington
Readiness Center Renovation North Carolina National Guard on October 13, 2014. Staff review of the plans and
specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in
Session Law 2008-211 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8140906 dated October 14,
2014, for the construction, operation and maintenance of the BMP's and built -upon area associated with the subject
project.
This permit shall be effective from the date of issuance until October 14, 2022, and shall be subject to the conditions and
limitations as specified therein. Please pay special attention to the conditions listed in this permit regarding the Operation
and Maintenance of the BMP(s), recordation of deed restrictions, certification of the BMP's, procedures for changing
ownership, transferring the permit, and renewing the permit. Failure to establish an adequate system for operation and
maintenance of the stormwater management system, to record deed restrictions, to certify the BMP's, to transfer the
permit, or to renew the permit, 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 by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must
conform to Chapter 150B of the North Carolina General Statutes, and must be filed with the OAH within thirty (30) days of
receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required)
and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-
3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Kelly Johnson in the
Wilmington Regional Office at [phone].
Sincerely,
4,�,Tracy D is, P.E., Director
Division of Energy, Mineral and Land Resources
GDS/kpj: G:\WQ\Shared\Stormwater\Permits & Projects\2014\140906 HD\201410 permit 140906
cc: Mr. Phillip G. Tripp, PE
Inspector, New Hanover County Building Inspections
New Hanover County Engineering
Division'of Coastal Management
Wilmington Regional Office Stormwater File
Division of Energy, Mineral, and Land Resources
Land Quality Section — Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 • (910) 796-72151 Fax: [phone]

State Stormwater Management Systems
Permit No. SW8140906
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY COMMERCIAL 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
State of North Carolina through the NC Department of Public Safety, NC National Guard
Wilmington Readiness Center Renovation North Carolina National Guard
2412 Infantry Rd, Wilmington, New Hanover County
FOR THE
construction, operation and maintenance of one (1) infiltration basin in compliance with the provisions of Session Law
2008-211 and 15A NCAC 2H .1000 (hereafter the "stormwaterrules'l and the approved stormwater management
plans and specifications and other supporting data as attached and on file with and approved by the Division and
considered a part of this permit.
This permit shall be effective from the date of issuance until October 14, 2022, and shall be subject to the following
specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater described in the application
and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described in
Section 1.8 of this permit. The stormwater control has been designed to handle the runoff from 148,565
square feet of impervious area.
3. The basin has been designed to handle the 10 year 24 hour design storm without discharging therefore
neither an LSNFS nor an of line bypass are required.
4. The tract will be limited to the amount of built -upon area indicated in Section 1.8 of this permit, and as shown
on the approved plans. The built -upon area for the future development is limited to 0 square feet.
5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into
the permitted stormwater control system.
6. The project shall provide a 50' wide vegetated buffer adjacent surface waters, measured horizontally from
and perpendicular to the normal pool of impounded structures, the top of bank of both sides of streams and
rivers, and the mean high water line of tidal waters.
7. Impervious area on the permitted plans that is outside of the drainage area line is not subject to State
Stormwater because it was existing development in place prior to 1988_
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8140906
8. The following design criteria have been permitted for the infiltration basin and must be provided and
maintained at design condition:
a.
Drainage Area, acres:
Onsite, ft2:
Offsite, ft2:
b.
Total Impervious Surfaces, ft2:
Onsite, ft2:
Offsite, ft2:
C.
Design Storm, inches:
d.
Basin Depth, feet:
e.
Bottom Elevation, FMSL:
f.
Bottom Surface Area, ft2:
g.
Max Stage Elevation of 10yr24hr storm, ft:
h.
Permitted Storage Volume (1.5inch), ft3:
ik.
Type of Soil:
j.
Expected Infiltration Rate, in/hr:
k.
Seasonal High Water Table, FMSL:
I.
Time to Draw Down, days:
M.
Receiving Stream/River Basin:
n.
Stream Index Number:
o.
Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
5.37
233,947
0
148,565
148,565
0
1.5
0.5
7.5
17,794
10.77
18,232
sand
1.20
5.5
0.43
UT to Smith Creek / Cape Fear
18-74-63
"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. If the stormwater system is 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.
3. The permittee shall follow the approved Operation and Maintenance Agreement in its entirety, and shall
provide and perform the listed operation and maintenance procedures at the specified intervals to assure
the permitted stormwater system functions at optimum efficiency.
d Records of maintenance activities must be kept for each permitted BMP. The reports will indicate the date,
activity, name of person performing the work and what actions were taken.
5. The facilities shall be constructed in accordance with the conditions of this permit, the approved plans and
specifications, and other supporting data.
6. All stormwater collection and treatment systems must be located in public rights -of -way, common areas or
easements. The final plats for the project will be recorded showing all such required rights -of -way, common
areas and easements, in accordance with the approved plans. Access to the stormwater facilities shall be
maintained via appropriate easements at all times.
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.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8140906
8. The permittee shall submit to the Director and shall have received approval for revised plans, specifications,
and calculations prior to construction, for any modification to the approved plans, including, but not limited
to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormwater management
measures, built -upon area, details, etc.
b. Redesign or addition to the approved amount of built -upon area or to the drainage area.
C. Further deveiopmeni, subdivision, acquisition, lease or sale of any, all or part of the project area.
d. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
e. The construction of any designated future BUA on the application.
9. The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written
time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall
provide copies of revised plans and certification in writing to the Director that the changes have been made.
III. GENERAL CONDITIONS
This permit is not transferable to any person or entity except after notice to and approval by the Director.
The permittee shall submit a completed and signed Name/Ownership Change Form, accompanied by the
supporting documentation as listed on the form, to the Division at least 60 days prior to any one or more of
the following events:
a. An ownership change including the sale or conveyance of the project area in whole or in part;
b. The sale or conveyance of the common areas to a Homeowner's or Property Owner's Association,
subject to the requirements of Session Law 2011-256;
c. Bankruptcy;
d. Foreclosure;
e. Dissolution of the partnership or corporate entity;
f. A name change of the current permittee;
g. A name change of the project;
h. A mailing address change of the permittee;
2. The permittee is responsible for compliance with all permit conditions until such time as the Division
approves the transfer request.
3. Approved plans, calculations, supplement forms, operation and maintenance agreements 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 at all times.
4. Any individual or entity found to be in noncompliance with the terms and conditions of this permit or with the
stormwater rules, is subject to enforcement action by the Division, in accordance with NCGS 143, Article 21.
5. 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.
6. In the event that the facilities fail to perform satisfactorily 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.
7. 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.
8. The permit issued shall continue in force and effect until revoked or terminated. The permit may be
modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification,
revocation and reissuance or termination does not stay any permit condition.
9. Unless specified elsewhere, permanent seeding requirements for the stormwater controls must follow the
guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8140906
10. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking
and reissuing the permit, or terminating the permit as allowed by the laws, rules and regulations contained in
Session Law 2008-211, Title 15A NCAC 2H. 1 000,.and NCGS 143-215.1 et. al.
11. The permittee shall submit a permit renewal application at least 180 days prior to the expiration date of this
permit. The renewal request must include the appropriate documentation and the processing fee.
Permit issued this the 14t^ day of October 2014.
NORT CAROLINA ENVIRON TAL MANAGEMENT COMMISSION
y Davis, .E., Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8140906
Wilmington Readiness Center Renovation North Carolina National Guard
Stormwater Permit No. SW8140906
New Hanover County
Designer's Certification
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.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8140906
Certification Requirements:
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 bypass structure weir elevation is per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the 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 pmvided.
12. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DEMLR Wilmington Regional Office
Inspector, New Hanover County Building Inspections
Page 7 of 7

f ,
DEMLR USE ONLY
Date Received
Fee Paid
Permit Number,
Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph H - Post Construction
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan
❑ Other WQ MgMt Plan:
State of North Carolina
Department of Environment and Natural Resources
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
1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Wilmington Readiness Center Renovation North Carolina National Guard
2. Location of Project (street address):
2412 Infantry Road
City:Wilmington County:New Hanover Zip:28405
3. Directions to project (from nearest major intersection):
From the intersection of US 74 Martin Luther King Jr. Parkway) and SR 1175 N. Kerr Ave. travel north
on N. Kerr Ave. approx. 0.8 mile. Turn left onto Control Tower Road and travel approx. 014 mile Turn left
onto Infantry Road and trave approx. 0.2 mile Site is on the left
4. Latitude:.34° 15' 47" N Longitude:770 53' 35" W of the main entrance to the project.
II. PERMIT INFORMATION:
1. a. Specify whether project is (check one): ®New []Modification ❑ Renewal w/ Modificationt
tRenewals with modifications also requires SWU-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 number , its issue date (if known) . 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 NHigh 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 xc ec r,
if assigned, and the previous name of the project, if diffe an cufently
proposed,
SEP 0 4
4. a. Additional Project Requirements (check applicable blanks; information on require to per can be
obtained by contacting the Customer Service Center at 1-877-623-6748): BY:
❑LAMA Major ®Sedimentation/Erosion Control:12 ar_ 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 W. http://portal.ncdenr.org/web/lr/rules-and-regulations
Form SWU-101 Version Oct. 31, 2013 Page 1 of 6

III. CONTACT INFORMATION
1. a. Print Applicant / Signing Officiars name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization:State of North Carolina through the NC Dept of Public Safe1y. NC National Guard
Signing Official & Title:LTC Rodney Newton
b. Contact information for person listed in item la above:
Street Address:1636 Bold Star Drive
City:Raleigh State:NC Zip:27607
Mailing Address (if applicable):
City:
Phone: (919 )_ 664-6062
Email:Rex.w.williams.nfggmail.mil
State: Zip:
Fax: ( 1
c. Please check the appropriate box. The applicant listed above is:
Z 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/Organization:
Signing Official & Title:
b. Contact information for person listed in item 2a above:
Street Address:
City: State: Zip:
Mailing Address (if applicable):
City:
Phone: ( )
Email:
State:Zip:
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:Construction and Facility Management Office NC National Guard
Signing Official & Title:Rex W. Williams, Senior Project Manager
b. Contact information for person listed in item 3a above:
Mailing Address:1636 Gold Star Drive Suite 2600
City:Ral fth State:NC Zip:27607
'hone: (919 ) 664-6062
Email:Rex.w.williams.nf @mail.mil
4. Local jurisdiction for building permits:
Fax: -Y, -
w.
un
SEP 0 4 2014
Point of Contact: Phone #:
Foram SWU-101 Version Oct. 31, 2013 Page 2 of 6

T.V. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Sheet flow into droll and curb inlets to a proposed infiltration basin
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 II - Post Construction
3. Stormwater runoff from this project drains to the Cape Fear River basin.
4. Total Property Area: 41.29 acres 5. Total Coastal Wetlands Area: 0 acres
6. Total Surface Water Area: 0 acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Area+:41.29 acres
+ TotaI project area shall be calculated to exclude the following: the normal pool of impounded structures, the area
between the banks of streams and rivers, the area below the Normal High Water (Nline or Mean High Water
(MHW) Iine, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BUA). Non -coastal wetlands landward of the NHW (or MHM line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 =18.28 %
9. How many drainage areas does the project have?1 (For high density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drainage Area 1
Drainage Area _
Drainage Area
Drainage Area
Receiving Stream Name
UT to Smith
Creek
_
_
Stream Class *
C;Sw
Stream Index Number *
18-74-63
Total Drainage Area (sf)
233,947
On -site Drainage Area (sf)
233,947
Off -site Drainage Area (sf)
-
Provosed Impervious Area** (sf)
148,565
% Impervious Area** total
63•5
Impervious" Surface Area
Drainage Area 1
Drainage Area _
Drainage Area
Drainage Area _
On -site Buildings/Lots (sf)
-
_
On -site Streets (sf)
-
On -site Parking (sf)
48,210
On -site Sidewalks (sf)
-
Other on -site (sf)
-
Future (s€)
59,950
Off -site (so
-
Existing BUA*** (sf)
40,405
Total (sf):
148,565
Stream Class and index Number can be determined at: http.aortal.ncdenr.org veb,4vVps csu/classifications
** Impervious area is defined as the built upon area including, but not limited to, buildings, roads; parfCix
sidewalks, gravel areas, etc. _ x.....
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6 OCT 03 214
sty

'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 BLIA.
11. How was the off -site impervious area listed above determined? Provide documentation. NA
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 stormwater requirements as per 15A 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://Dortal.ncdenr.org/web/wq/ws/su/bmv-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
ht!R://12ortal.ncdenr.org/web/wg/ws/su/­statesw/forms- dots. 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 athft://12ortal.ncdenr.org/web/IVA/ws/su/mal2s.)
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 hW2://portal.ncdenr.org/web/wg/ws/su/statesw/forms does.
U1. Original and one copy of the Stormwater Management Permit Application Form. Initials
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants JA
Form. (if required as per Part VII below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M mt i
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to 1GfW
http://www envhelp org/pages/onestolexpress 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 1/2 mile of the site boundary, include the 1/2
mile radius on the map.
7. Sealed, signed and dated calculations (one copy).
8. Two sets of plans folded to 8.5" x 1.4" (sealed; signed, & dated), including:Iq (y
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale.,.. ,•
g. Revision number and dates. E
h. Identify all surface waters on the plans by delineating the normal pool eleva o,r
impounded structures, the banks of streams and rivers, the MHW or NHW Out d � 2014 �
waters, and any coastal wetlands landward of the MHW or NHW lines.
Delineate the vegetated buffer landward from the normal pool elevation o impoundP�—
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.
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.
Form SWU-101 Version Oct. 31, 2013 Page 4 of 6

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 d1w_
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verify the SHWT prior
to submittal, [phone].)
10. A copy of the most current property deed. Deed book:1121 Page No: 0020
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 2H.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.
hft://www.secretary.state.nc.us/Corl2orations/CSearch.aVx
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 http://portal.ncdenr.org/web/lr/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.
VIII. 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:Phift G. Triyy, P.E.
Consulting Firm: Tft12 Engineering
Mailing Address:419 Chestnut Street
City:Wihni Zton
Phone: (910 ) 763-5100
Email:[e-mail]
State:NC Zip:28401
Fax: [phone]
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 1 a) 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 systerq; C E l `' ,
SEP042014
BY:
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
agenf (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.
Signature: Date:
a Notary Public for the State of . County of
do hereby certify that
personally appeared
before me this _ day of .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
I, (print or type name of person listed in Contact Information, item Ia) Rodney Newton
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of the
applicable stormwater rules under 15A NCAC 2H .1000 and any other applicable state stormwater requirements.
Signature: - A, / Date:
a Notary Public for the State of kho
Il Vv"-County of
do hereby certify that l( kA aa'k dbt personally appeared
before me this - day of ake\-t-I, and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal, �—
SEAL
P� A•
My commission expires MeLUA./�
E.
SEP 0 4 2014._
BY:
Form SWU-101 Version Oct. 31, 2013 Page 6 of 6

Permit No.�w-3 14 cA 0(o
(to be provided by DWQJ
op W ALe
WASTORMWATER MANAGEMENT PERMIT APPLICATION FORM
ICDENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION BASIN 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 of the required information.
I. PROJECT INFORMATION
Project Name Wilmington National Guard
Contact Person Phil Tripp
Phone Number 910-763-5100
Date 10/912014
Drainage Area Number 1
II. DESIGN INFORMATION
Site Characteristics
Drainage area
233,947.00
Impervious area
148,565.00
ftz
Percent impervious
63.50
%
Design rainfall depth
1.50
in
Peak Flow Calculations
1-yr, 24-hr rainfall depth
1-yr, 24-hr Intensity
Pre -development 1-yr, 24-hr discharge
Post -development 1-yr, 24-hr discharge
Pre/Post 1-yr, 24-hr peak flow control
Storage Volume: Non -SA Waters
Minimum design volume required
Design volume provided
Storage Volume: SA Waters
1.5" runoff volume
Pre -development 1-yr, 24-hr runoff volume
Post -development 1-yr, 24-hr runoff volume
Minimum required volume
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Basin Design Parameters
Drawdown time
Basin side slopes
Basin bottom elevation
Storage elevation
Storage Surface Area
Top elevation
Basin Bottom Dimensions
Basin length
Basin width
Bottom Surface Area
3.76
in
3.90
inlllr
0.92
f6sec
13.82
(t3lsec
12.90
01sac
18,172.00 ft
18,232.00 ft OK for non -SA waters
ft3
fl3
ft
ft
ft
sand
1.20
in/hr
5.50
fmsl
0.43
days OK
3.00
:1 OK
7.50
fmsl OK
8.00
fmsl
18,870.00
f?
13.00
fmsl
175.00
ft
130.00
ft
17,794.00
fe
EGEIVE�
OCT 18 2014
Form SV4401-Infiltration Basin-Rev.5 11Apr2011 Parts I. & II. Design Summary, Page 1 of 2

Permit No. ! A'-2 %Ogoko
(to be provided by DWQJ
Additional Information
Maximum runoff to each inlet to the basin?
2.00 ac-in
OK
Length of vegetative filter for overflow
na ft
OK
Distance to structure
35.00 it
OK
Distance from surface waters
1,300.00 It
OK
Disfarice from water supply well(s)
100+ fr
OK
Separation from impervious soil layer
2.00 fit
OK
Naturally occuring soil above shwt
2.00 fit
OK
Bottom covered with 4-in of clean sand?
y (Y or N)
OK
Proposed drainage easement provided?
y (Y or N)
OK
Capures all runoff at ultimate build -out?
y (Y or N)
OK
Bypass provided for larger storms?
na (Y or N)
OK
Pretreatment device provided
drop inlet
CCT 13 20%
Form SW401-Infiltration Basin-Rev.5 11Ap2011 Parts I. & II. Design Summary, Page 2 of 2

Permit Number: :5_11V Sl 17_d
(to be provided by�DWQ)
Drainage Area Number:
Infiltration Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- The drainage area will be carefully managed to reduce the sediment load to the
infiltration basin.
- Immediately after the infiltration basin is established, the vegetation will be
watered twice weekly if needed until the plants become established (commonly
six weeks).
- No portion of the infiltration basin will be fertilized after the initial fertilization
that is required to establish the vegetation.
- The vegetation in and around the basin will be maintained at a height of
approximately six inches.
After the infiltration basin is established, it will be inspected once a quarter 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
infiltration basin
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 lime and a
one-time fertilizer application.
The inlet device: pipe or
swale
The pipe is clogged (if
applicable).
Unclog the pipe. Dispose of the
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
swale (if applicable).
Regrade the swale if necessary to
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future rob! r
Ila
SEP042014
BY:
Form SW401-Infiltration Basin O&M-Rev.3 Page 1 of 3

BMP element:
The forebay
The main treatment area
The embankment
The outlet device
The receiving water
Potential
Sediment has accumulated
and reduced the depth to 75%
of the original design depth.
Erosion has occurred or
riprap is displaced.
Weeds are present.
A visible layer of sediment
has accumulated.
Water is standing more than
5 days after a storm event.
Weeds and noxious plants are
growing in the main
treatment area.
Shrubs or trees have started
to grow on the embankment.
An annual inspection by an
appropriate professional
shows that the embankment
needs repair.
Clogging has occurred.
The outlet device is
Erosion or other signs of
damage have occurred at the
cutlet.
How I will remediate the
Search for the source of the
sedan ent cnd remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Remove the weeds, preferably by
hand. If pesticides are used, wipe
them on the plants rather than
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BUT. Replace any media that
was removed in the process.
Revegetate disturbed areas
Replace the top few inches of filter
media and see if this corrects the
standing water problem. If so,
revegetate immediately. If not,
consult an appropriate professional
for a more extensive repair.
Remove the plants by hand or by
wiping them with pesticide (do not
Remove shrubs or trees
Make all needed repairs.
Clean out the outlet device. Dispose
of the sediment off -site.
Repair or replace the outlet device.
Contact the NC Division of Water
Quality 401 Oversight Unit at 919-
733-1786.
E%.EIV .
SEP042014
BY:
Form SW401-Infiltration Basin O&M-Rev.3 Page 2 of 3

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name: Wilmington Rediness Center Renovation North Carolina National Guard
BMP drainage area number:I
Print name:Rodney Newton
Title:Lieutenant Colonel, CFMO, NC National Guard
Address:_1.636 Gold Star Drive, Raleigh NC 27607
Date: 3J aK�&A a6y4
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, a Notary Public for the State of
I'AtACA County of &A do hereby certify that
5 )\)Q A personally appeared before me this.
day of l� , and acknowledge the due execution of the
forgoing infiltration basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires M6UA i (161,
SEP 0 4 20%
BY:
Form SW401-Infiltration Basin O&M-Rev.3 Page 3 of 3

N
i I W E
SITE S
\ ' CONTROL
TOWER DR.
\ 1 i
SITE DATA:
m
1
PROPERTY OWNER.
USA NEW HANOVER COUNTY AIRPORT LAND
1
R04200-001-025-000 \
PID No.: R04200-001-031-000
ZONING: A -I
TRACT AREA: 41.29 Ac. ALTERNATE # 1 REPLACE EXIST., 7'x
ADDRESS: 2412 INFANTRY RD. END ALTERNATE: CHAIN LINK FENCE `(560 LF PT LOVEMARKED
WILMINGTON NC 28405 ' Ix--x-x - x . 3.2dv,' , •� , r18.42 f' - - - / - R04200-001-026-001 \ \ M
7 CHAIN LINK FENCE (TYP) �+ .23.7, ,?.93 SD SH`EE , c� y f-
x as °S / f' �� • \ - / ,' \, `,'\ (DEED NOT IN SYSTEM) \ \ \
LIMITS OF DISTURBANCE: 12.0 Ac. +� ;,
i _ - - r \� ; '? / / ', �\ \ i \ 514 Market Street
ENO 2,.22 f' ; ��; r'`, /,- _ -`��`�4\ \ \ Wilmington, ' NC 28401
x r�82• �, „ ft ,' / / / _ _ 1 , \\\ 16" RCP FES , LOCATION MAP Tel [phone]
v, 56 ,E / - / / / / y -- ' ` ! t \ \\\ INV. ELEV, = 8.44 > \ PROPOSED DECORATIVE NOT TO SCALE ( ) x 3.30 22.82 - ? -' % / i
:' / /� __.�_ `, \,___ ,' Fax - [phone]
l ejs.50 / 169 .86% / % - - , SLIDING SECURITY
s - " M 16 RAP FES \\ /
2ss6 i I ,_ / r /f f INV. 'ELEV. = 8. 13 \ / �'
' `` ` ENT Y GATE
I Fc
x i r� � ' / I!. , % , f -_�` ..•z.Y t _\>>� ' � SEE HEET C3
NEW HANOVER COUNTY AIRPORT LAND
R04200-001-025-000� ! ~t\\\ /
P.O.L FMC I , _ I / ` f I / l ! l N - - / I
WET NDS POCKET "C"
NO LOCATION WORK x t I t R / ! /% 12,414 Sii. FT, ,� / 18" RCP
t 0.055 JACRES /
OR ELEVATIONS TAKEN i i `�\ i t i Ij / �/ / INV, ELEV. = 6.46 \ \
IN RESTRICTED AREA I \ ' i fl t1 \ \ i 1 /� 18" RC
x 1 , \ \ ! \ 1 1 4INV. EJ_E-�/'.' = 6.8 , n 14" GALV \ \ \ \
x I ` 1 l 1 ? \ \ \ 9 t 1 / = +� � `. • . � „ ,�. INV. ELEV.
CONTRACTOR SHALL CLEAR AND GRUB \ ' ' I ! / + INS ALL 21 LF
%IST. DI I x \ i \ \ / \, �\ \
STAND OFF AREA RIM 21.51 I \ \ I 1 t , 1 \ \ \ J % �\\\ 1s cMP ,
f INV 18.46 I x ` ` \ ' , \ % ; ! \ \ \ ELEV. 9 \ 8 D CORATIVE SECURITY FENCE
20 CLEARING LIMITS (TYP) I `\ 1 I ' ` \ �� \ \ /,- �/ r 1 " cm `: \ ' %
22.4D \ \ i \ \ i / 1 _ \ s \ SEE C3 TRIPP ETGIlMMUNG P C
S EET \
?`- 1 I zz�96 \ \ \\ ' I \ 1 NO TRgS Lt CATED i 1 ? , I ! LV. r - \ • •
{ , - \ I P.O,L FNC \ \ \ \ t IN THIS AR \ 1 " i i - 2aawEi\_ ��\ u'• 419 Chestnut Street
AIN LINK - i \ { 70 CHERRY PINE \ \ \ \ l / +
1 CHAIN LINK x 1 \ `\ \ - , f _ _ . "� 8 Wilmington, North Carolina 28401
FENCE t E, \ \ \ \ \ ` \
I i n
x-x-x-x-x-x-x-x-x ! to cuMt ae . \ 1 j t S __ J! J r , t7 INE1 zPii \i\\\\ iY \ \
Phone [phone] Fax
4 3 0 MAPLE ` '� .� \\ \ \ \ \ \ ` ,` ``' « /' / .�-- \ j //� \ .� \\\ • � \ \ 910-763-5631
t f 1 20 PINE . ,- - � \ \ \ \ .\ / 1 \ ��
- NC LICENSE No. C-1427
\ s 8 PINE \ \ ) \ / _
�.-'` 1 ! ! I' � \`il\\ � 2014 TRIPP ENGINEERING, P.C.
1\ i �5t 1 \ / ~1 ,9 PIN $ / / \ \ '\ \ /)/ / ~ \ / l / 1 SPINE
12 PINE / y20 IN - - 8 MAPLE ; �''47p MAPLE \ \ / ; - - 1 C71M �t 1 ! \ \\ \
t t XIST. DI 15PINE -� _ \ l / - CONC PAS / ry / �w 7 / 22 PINE 12 0 1 IN .:.6 PINE q°.. 20 PINE' FAO MAPLE - 4-10 OAK \ ♦ 1 _
1 \ t x RIM 19.85 / �2
18 PINE . �MA G 14
t 1 t t \ INV \ 18.20 f3 C `i"� i A 3 PINE ' 20 PINE �gy� \ \ _ ) / "' \ � ^ , i � �....� / / 12P 1 1 ) \ \\\ \ �• 'q \ ® \\\ ////
�' yzt3 PINE 18 PINE\,... Y v i / /'u'! t NE'
14 PINE 16 PI a PINE 6 PINE 1 PINE \ \ ` `
\ \ / 8 MAPLE \ ~ % f ! / % 6gIN IN�g
8 MAPLE OPINEQ7'" i i % e
"� 22 PINE i INEt4P 18 PIN -� \ "„1 _ / !I ! / / ti boAK
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1 , 2 PINE R `� .5• \_ { ~ \ / h \ v \ • •� • e . e .
t I 1 t 2f - 8PINE -'_. i
16 PINE 8PINE i PINE (� 18 PINS- -. .12PItJ
12 OAK '8 PINE '° MA ,.,...-..._. �. 1 i a INE
13 PINE CU ! 5 1 / / ! ' I ,.
,g x 20. PINE% k.��? iJ ^J.y A � � ,I I /, / / PINSB \ �/ \
tsT DI /\18 PINE i 4 PINE ( .8 MAPLE E•'` ' % / / i ? \ \\\\ \ \ �!._ \ S E A L '
,4�. M 6 PINE '42INEP"
�"`S MAPLE 20 PINE76 PFNE- \�%- \ / \ / .,......1 ! % 15�1 \\\
gIM 2.99 / \ 12 P E a ,y_{ kC" PINE / \ ! !, PIN ? \\ \ \ \ -
I t I t � - 75 PJE 14 PINEE� 16 PINE ; DAI�/A- `. ♦
INV 1 59 / ,, 18 PIN 8 OAK `Y / ( ' / 2 a `
1 ' 18 PINE 8 MAPLE 12.-PINE 18 PINE t /i FJ 1 /, I }60 8PIN1: "\\ ♦
\ 12 PINE 18 PINE„ \ %' ,' rr r,4P E INSTALL 440 LF �/\ \\�: PT LOVE \ \ 7374
I l 1 �- t �• v 8 OAK .� 14 NE 2PINE 141 tAl ". 6MAPLE 1 18 PINE t NE 1 0 YI _}I'I t
PIN 4 PINEi ; 4a. ,'v`"`�y\ • / '`' T J .r ,2P1 d t l \ \ i •• .�►
t 14 PINE o 14 PINE B i \` /
7 .1 \ 9 9 PINE _-'18PME; / 20 PINE OAK r J/' ,' . ? 'I % CHAIN LINK FENCE \, \� \ \ \ % < • �- \
e
14 P1fJE \ O 96 PINE \ R04200-001-024-002 •. F
94 INE ''fi _�+,g%
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N8 PI' i6 PINE. 0 PINE r,. / fl 18 %""E`. / , SEE SHEET C3 \ . ♦ \ \ \ %l�j� •e!�it••.•'`\\\\ "
18 PINE - r 14 PINE .-4 PINE ! ` / 20'PIN� 'I u I \ DB 1337 712 , \
? \ 12 PINE •'2 /, / /..
14 PINE 12 PI 2PINE• 8 OAKw18 PINE / ,, • 18 .PIN / \ \� \ // �REG4� \\
=I t 1 \ Z 1 \ 18 PI 4 •. ,�^" - 12 PINE 16 - INE 4 �%\\
( �. 16 I1JE 16 PINE ' 4 PINE i8 PINE
18 PINE 12 PINE 16� PINE/ 8PINE
•.( 1 •'�.' ��. .i8 PINE '•., 16 PINE IOMA� \ 1 if / �PINE181NE EXIST. TREES
20 PINE - r - /.
'XtST. DI x 14 PIN � 'S PIN '�. �,, 3P NE�8MAPLE � 6 CUM 0 PINE ,6 INE 14 PINE
\ `Y'b aPINE 8 MAP ! / 16 PINE+.;T. {/ TO BE REMOVED
\33.01 17 PINEY f 17 PI 113P , E l PIN 4 PINE I ,2 PIN ,,;s�[i 2PINE 1 ,J \ ,' l / 1 PINE
N09°04'09>fW 1 1f t 'I ; ; I t INV 7.01 / 18 PINE �•r (TYP)
t , , I \ 1 1 � 77 PINE - \ 72 PINE' � � �q�` r 1 PINE 2 PINE2 PINE `i1• /'t / � ` � ` 1 1 P \\ \ \
399.07' I 1 \ 12 PINE 11 SnPINE.
1 + ( 3 �1 1 i 1 1 '\ 20 PIN 74 PINE - 20 PINE 78 PIN 8 PIN 1 \
t \_ 'N6 PIN 18 INE 1 PINE INE
t i i ,.. 1t +` \ I _'t i" ti \ 16 PINE ..,,�y..3J / 14 PINS: \ / n ! 4 `
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18 PINE 13 INE BPWE \\
- s 20 -PINE 6 PINE \ ) / ' 2,4 PINE P �_ It \ \
1 I f - t 1 I t i •,, \ XIST. DI 16 fkINE' .. 2PINE 15 PINNf20 PINE . , ' 4 ' -~. _ -•_ .-.... 440.69 \ \ \ O
EXIST. D I I t t 1 t 0 PINE 1 8 PME O. / "
w I \ \ t �, RIM 19.85 }8 N+ r �' :`18 PINE t8 PINE
` _.1 \ _^ - �_ - - ��• - ALTERNATE #.1 \ P*
RIM 19.38 } \ 1 1 1 I . , INV 15,66 \12 PIN 2PINE PINE 7 IN PIN r / ()NC PA t j��. •
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11 ,t 5 t `\ �,18 PINE 16 PIN / 12 PINE _ / BEGIN ALTEf��NATE: \
26 PINE' E'.�\,� PINE N -14 INE % ' / - \. t, �•�� , �',3 PINE I t\ 1 \ 18 PIN 17 PINE 'j2y8% PINE 14 PINE "'K2PINE / / j' \ DC R I i f
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12" RCP , : i EXIST. DI- 1 I l 1. 19 PIN R. .•� ! �Q , /I x " \ TYP m \
ELEV. = 16.54 /; / I'1 t i II\ \ 14 PINE 0 a BE/ REMbVEQ 8 HARDWOOD t PINE C ) e f ff \ 1
l t RIM 20.53 1 I x 1 t 1, !t 17 PINE h to E \ S 48C. 48 28 E \\ \ \ V
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1 � ` Ill i � l INV 17.6� IN 17.64 i 75 PINE
1 i ( t t 1 \ 1 PINE \ ' I 32 PINE
i\tltl.,Q'1} I x' I tt \ \ i !% 10' K � \ \
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/ lIII I f///� / �'� XIST. A ;! \ 1 ' .' 1 i 1 't' "� -- , ` \ �6 tO CHERRY 1 /1!( tM 21:4 ; , 1t1t1 11 s . \� 1 +�t 1 REMOVE EXIST. \\ / 'R�� e � ! „DAK FLOOD ZONE: X
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NEW HANOVER COUNTY AIRPORT LAND I !' i J ! - - _ �. 1 / I I 1 \ l \ INV IN 15.8s / r 1 ASPHALT OVERLAY 0 Q�
IST. D 1 �! i t v A � � !
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f/I / '�' � '' \ '� �'' : f///I ! ' • Q ,' � o � � � \\\ _ ,� ' -' I � \ )NE .;fiPl 1 (4) MOBILE UNITS `\\
EXIST, o / �. EXIST. DI \ _ _. _ - -_'-•� �'�/;r, r Iwl �1Pol \ P \� \ E WATER AND SEWER SERVICES Q� CC� ..�
RIM 14.54 INV / h `` \2o/i9 cua \
RIM 16.57/ �- Q \ R+
/ h
INV 11.25 / ,`'` , \ }�`v� \ ry '16 P , 6 E c
,t ,, '\ , P � ,�, ' , ., , 1 ,, TAN' OFF AREA `\ 1
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`a
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CONc \ > -_- _ �� +: / �, r.,� o \ r 20 CLEARING LIMITS TYP \
ti r---+
P M
/ / \ STEPS /�Ei�IST. zPIE \ \
-' �.x'� �/',�/''' '� fTENNIS � \ T�
CONCRETE DITCH /, t , \ Il -v X�i'" f / i I i r r ` :. SA \\ \\\\\'� COURT F� 1 5P11� XIST. TREES/ \ (�
/ �x �x / , /�
/ � A
TO BE RE�MbV � ►-i Z Q
iX.�x� ` r i \ \ \ j �. \ 4 \ 8 CHER [ (TYP)
1 �, t i \
-1� - PPROX.„ LOTION \\� \\ / I I t f I \ •'■Ij C, N s� O
12" RCP / l /' /.51 C1�AtN - ! / �' f 1 ;1 ' t /,/� EXIST. 8 W \ \ \�\ \\ \ G4,Q1 rr ll
1�
I.E. = 10.83 !C / ! t1N� i i \ !�
\� T PHONE C / / 1a /y1__`111tL
#OX. \\\' \ , >�OCATE LTERNATE \\ ' IST. SSMH BUILDING 1 DESTAL 1 12" c /4,� ATION �. -', , \\ »' »\ \ \ \ RIM 12501 XIST. 6" / 0� G �, I r 1 \ PL G EXIST. 6 W \ 1 �2 / PVC \\ ,\ ' INV NOT ACCESSIBLE FINISH FLOOR / \--_ » / \LLC/:'= �. 9 / i f�P ��• / 4 -><6 x8 TAPPING SLEE �- WATER SER�IG�\
EXIST. D "EaQST. SSM �' -- - / ,, t r' i Q � � / ,/ � . �2t# �,,;i,' y� '�_ „�iI "'TAPPING VALVE a . � � RtM ,�i8.51 \ `~ �
RIM 14.26 .65 / L / RIM 10.'71" �-~-_-. REMOVE IgT. / / % / `� h �, / r
'�' ` _ _ / ! , \ , / ! EU EXIST. FH / /
INV 10.93 /� r' "-iN' •-OU -&'= 2.z2-1� i i` �O op / It�V(N)15.01 ; \
LOC ON
--' �iOhl'Ci.T \��'i, �l o• /' % dNV(W)}1:4-, �\ / \, ' \ !"�
1FlV IN 6",...2 8Z.t� .,_ / _pI � , \
s• � � , x / I `I V`IN 8 4.22 .- ,•' % �, ... 1 �A / \ OJ�,�\� � ii / � . /'-tNG(E)11.71 PINE
EX1aT S/P4P \ \� c�� p�oQ / I �� \ / XIST. SSMH
XIST. , RAI COLLECTOR F WV $0 88 O ��
EXIST. SSMH---,I t / - V I ✓ ,' , % 7 R 17.61 , \ �� p /
\ R 1 RIM 14.27 f 1 / / / f t x► j Vw- 9 46 \ \ �Wj/ \ ��' / PR,9P K E l�f (TO/ REMAIN)
\ INV 8.81 _ / �t / OD -' - a 1 \ / / ? /� f \ \ \ ��� / XISTi. WATER T K - ,••l�
\ CONTRACTOR SHALL CLEAR AND GRUB / / I I I - _ j, 1 136" ,�,� ��„: , �� , ,' AND RESERV01 ,'� , p0, 7' CHAIN LINK FENCE (TYP)
\ \ STAND OFF AREA 7 f� '�\ , \ \ ,- - _' , r ff I.E.=S. _� ,,,� f I \ \ S / TO BE :DEMO ,�D� •�
\\ COMPUTED 20 CLEARING LIMITS (TYP) Cp• / ; \\ - _ _ ____13 _ - ., t\ _ i _ / ,' / �'\ , 0'), // '� �• NEW HANOVER COUNTY AIRPORT LAND
r i '" � LUG EX.\ w t
\ \ S21 °35 33 E �� \ .� O�E9 CHA �C �: I �-- ':� -I "- - - la" f + - QPCS Q` �- /' y`\ \ \ \\ \ S8MH UME \ /' !' �4, ��` �� / R04 .�
\ ~C L SLIDE G! / ++` \ LINE 1 ,: X c c
1 I XIST. SSM 200-001-025-000
\ 20.06 \- \ `1. SSE .�� C3/I LEPHONE J DI #20 I.E. 6 i _ ATE'/ \ \. / I 1 i 49
J \ t PEDESTAL - ~� 8 MAPLE 6 ! I 1 ? `IINVRIN\ 14`35 ck _ a�
V� O �l�� MONUMENTATION NOT SURVEYED GO�e �'�� - ~ ! ,' / I.E.= 7.00' / ' . _ \ 9 �R�,00D � .: 1 ! j ? "�7- 0 5.65� _ } \ �' P / T0`
COMP ALONG DASHED PROPERTY LINES •''J� FLOOD -ZONE r� '\E) i` ~ !/ /' i t t `t` E\HARDWOOD csS' v 1t IoAi� �q - - _/l \ ' f ,16 PINE XIST. CONC. FL E ooO
6 1 ° ED -�� :\ ! ' STEEL BLDG. -L. s ? i Ii / 10PLE t t t� D D �15 N_ : 4& "` /- \� _ 1 iN
10 2 0 O /� - 9.1 T �� o ANCE \� '� �.� T. ss � - t " t I / I � �� a� �I� 4�1 E T. T�E-E l-- - ~�;� �TO BE RE�Ib(OVED
7 2 ' \ / coNc. SLAB - 1 36 FES 1 $fi2HARDW00D G ?14 PINE - r ' PI
RIM
14.04 ELEV. =1 1.65 f - 1s
INV 1
-'�'' �e ,� • \ �. CB INACCESSIBLE \ uM •-'
J '� '/ nT / ., •t \ `` ./ / \ 1 r"'_ j ! , I \,\ 2HARDW D t i .; 6 PINE" /i 6 t7 #SCAR
Fc: % 7\\
STE L�LDG. J BUILDING I \ " "
J FWISt1 , 1 P f�t� 25 PINE y 10 R F ^ \ XIST. SSMH
� ce>�c. � #2 .i/VETLANDS (�tKET \ A \ 54 PINE �J
FLOOR 1 1 8,4-4a SQ. FT. ` e ,a„ P oD € W RIM 9.16 L
12.06' 1C E - - - 1 1 1 D.194 ACRES ..� i to - ,,.1 INV 0.1 1 AN
AR ) � ..�� p
\ ROVED
ASPHALT I A$TEI OIL 1 P ♦ P W f /' XIST. 8"SS
2J \ / / / I \ \ \ / J �Y/ r ! oR�GXI ` \ P - 6/6/6 DAK' t OVEWRONME
(J \ I N R - / / f J 1 '\ (C� j I 19 PINE 15 PINE/ 2 P 1 -, , PIN 1 I OAK REM
,-_� \ 1 , I INTAL
- 7 �' TO BE REMOVED � � CAS
__ ._ _ _ _ . �` .� '� �' t \ CONC PAD 1 i � ' I E .'+ p{ _ 9 OAK 7 PINE vw__-- �i 6 PIN 9 EXIST.
tJ 2\ \ (I N - AC C E Qx _ !t GENERATOR 1 i 15 PI 1 \ is PINE / 9 PINE / ! � O
r'
GrF��� OT ' E 1 INE PI 15" RCP -
Q � .". -" � �. /'' '- / { (WA - r- � I I i 1 -•- _" '/ tl ,1�, CJTfV►1 /1 PI'TMpJP THE �5 PINEt1 2. '� ` 12�' E .....���. 7 PttlE ! .
O w. 10\8- MAPLE " 12 L{-... \ r / / , 1 1 ~ .. 1. .. I I 11[ �E_ 15`PJ P . ` a u h vy8 p `_ '' A _
! / _ _ % tt \ �i��9 7 PI ,4\12 INE 14 INE 2 PIN 'E /
4 MAG �~�---- __ S - sEFr" BlU - ROPOSED INFILTRATION BASIN F-
R1 5 0 2D 1>4 - -FLOOD ZON _. �' ' , ;1 ,9PfIC� 1, NE _ ` j N f- Ll.�
-_� _ t� a sty -
-.
4i, ffi 4 ,2 OAK i 12PINE i7PINE t At EL 8 `-- _ , `,_ ', / �\ ;5 PINE '_- .. ` - XIST. TREES
17PINE b 8 CUM , ELEC. '`• - / 1 / -.�'� 15 PINE 4 P .;n, w.
2� �i6 PIN 2PINE \( HIGH VOLTAGE J \ 18 E
1 `.�'� 14 PINE I / - 1 PINE
�Ay t4\70\8 POPLAR GUM 1 , ; ,`gol.w , a 5 TO BE REMOVED Cn
° 2_` Q C10 14 PINE M i5 PIN 9-GUM l / "- - _ J •� Q>o on' 12 INE - i \I r 5 PINE `- -
-(EMAPLE -_ . /� •..Y '- f - P"'� -_ .. 8 0 xwT2 PIN
8 UM "- i �.ho� 7. MAC ,�. Lt15 HARD - s f NE
i� GG 4 -Pfp18
6 V M 2io r • 0 i4 AfO \ •a^ 9 GUM \ (TYP)
GO A 4 PINE+ / - 14 HARDW00 ry E
G K ;?s t 12 POP PINE fit... SPIN Cy 1 PINE 12PINE __C' t t`
r�
\ 14 HARDWOOD 20PIN .a n
r a 17PINE �' % � 0\12MAPLE 'y; - ---' "' � � .5' 4 PINE .. XIST. .S SSMH
I 10 \6 P 14 ak r p , 10 Gt�ki.. '�, 6�E MAPLE tt8 PINE �76 P` IN -ESA 8 0 PINE
ii RI 10.78JOB NUMBER
.. . ...... IN 14PINE -�F v i... 24PINE. 22PIN 1>3 PINE 76 PINE
-EXIST. �fREES �° �, a / 12POPs<`f.` / \ V� to MAPLE -E INV 1.13
" ", - � PINE
i8 PIN m 22 PINE / } INV IN 3.11
\ TO BE REMOVE ""--' 6\13 C' - -'1 _ 13 PIN �d 13 PINE `t PINE1 PISUIE
�- 15\'f3MAG " \7 7 K i i MAP Yv 8PINE tu, DRAWN B Y
Cni'�) \ 9\COMA . I `+• � � . a 1 CUM � �/ 4/4/6 M � � -
11�- 5P
_.. - ��19 PINE .'.78 "" ,v / f2 HARDWOOD r "�
e f ff ......_ �_. _._ � - ._ � __ - WOOD' SPIN e � 6 MAPL � e - e f ff
MA AE FLOOD ZONE 82 55 50 V S73 03 39 W
955 f W "'XIST. TREES XIST. TREES ONTRACTOR SHALL CLEAR AND GRUB
44 (TOTAL) TO BE REMOVE ETLAND POCKET a R1 a TO BE REMOVED 476.29 STAND OFF AREA EJW
0 R 1 ) 5,9 1 SQ. FT. XIST. SSMH CHECKED BY
(TYP) 0. 37 ACRES FLOOD ZON RIM 11.57 (TYP) 20 CLEARING LIMITS (TYP)
CONTRACTOR SHALL CLEAR AND GRUB AE (EL 8) INV 6" 4.39
PGT
STAND OFF AREA
20' CLEARING LIMITS (TYP) LEGEND DATE
NEW HANOVER COUNTY AIRPORT LAND
R04200-001-025-000 OU-17-14
------------ PROPERTY LINE REVISIONS
UPDATED FENCE LINETYPE
NEW HANOVER COUNTY AIRPORT LAND
R04200-001-025-000
R1 FOR ALTERNATE #1, REVISED
DECORATIVE SECURITY FENCE CLEARING LIMITS NOTE FOR
7' CHAIN LINK FENCE (TYP) APLAN CONSISTENCY AND REMOVED
CHAIN LINK FENCE (BASE BiD) ALTERNATE #1 BEGIN ALTERNATE
FROM CHAIN LINK FENCE LABEL
CHAIN LINK FENCE (ALTERNATE #1) AROUND PROP: MOV PARKING AREA
W.
I
SH`TIAMBEi
SITE PLAN
U.
10
SEP 0 3 201 c 1
100, 50' 0' 100' 200' 300'

x \__X-X--X-X-x _x
N
XIST. DI
SITE DATA: 1RIM 19.85
'` i i ' ,, i INV\ 18.20 �\_ ~ 1 � - ' '` �
PROPERTY OWNER: USA
PID No.: R04200-001-031 -000 ' i r ' r f' ti \
ZONING: A-1 y ` ' } ' ' \ , / , i r
f
TRACT AREA: 41.29 Ac. '' \ \ ,o _ ^ ... __ f ' f i I
ADDRESS: 2412 INFANTRY RD.
�,.
WILMINGTON, NC 28405 X I SDI
RIM 32.99
LIMITS OF DISTURBANCE: 5.0 Ac. _�\59 '0�
INV 1
IMPERVIOUS AREAS
C)
EXISTING BUILDING 23,560 SF #' ' `, , `} ;' it't'} ',` �, /- �,; \ I r� r` �/ / ` ; , I
It
if . -,/� 11 1, 11 ' * / .1 / / / /-,
EXISTING ASPHALT 145,730 SF I
EXISTING CONCRETE
45,955 SF
0
TOTAL EXISTING IMPERVIOUS -7
215,245 SF
PROPOSED BUILDING 0 SF
PROPOSED ASPHALT 48,210 SF 2 , f 't I { i i= i '� �` /' j< \ i / ' ,r / I
PROPOSED CONCRETE 0 SF �IST. 01
'R 14 \33,01
TOTAL PROPOSED IMPERVIOUS 48,210 SF V
it INV 1�7.01
TOTAL FUTURE IMPERVIOUS 59,950 SF i i° + ! ' ! \ ; k ' i - / \
TOTAL IMPERVIOUS AREA 323,405 SF �{ ; ' ,y i, ' 1, \
(EXISTING+ PROPOSED+ FUTURE)
�,' `, !', 1 " t j,1 i _ _ 1 \ _ __ __ __......_ _._ ._ __.._ _ / \ ; I \
PERCENTAGE OF IMPERVIOUS SURFACE 17.98% t 1XIST. DI
, \
EXIST. D \
Designer's Plan Certification: RIM 19.38 1 RIM 19.85
INV 15.66
INV 16.83 1 1 k,
"I hereby certify that this plan has been prepared in accordance with the latest New Hanover
County Ordinances and Storm Water Design ManuaL"
Signature:i _ i ;'t t / / �, ' ; t \
Printed Name and Title: Phillip G. Tho. P.E.
Date:
�
Registration Number: 17374 SEAL i 2\ RCP
FLEV. 15.03-
V
12" RCP
4 I ! ; , "` ! ,, ii 1 '- , i ;, SJ
EXIST. I D
Property Owner Certification: ELEV. 1 6.5 4 4 V
RIM 20.53
"I (We) hereby certify that I (we) am (are) the current owner of the property and that upon XIST.\ DI 4
INV 15.4
receipt of "Authorization -To -Construct" any clearing, grading, construction or development, \R\l M 29\04
New Hanover County, the State of North Carolina and the Federal Government and its
will be performed in accordance with this plan and that the applicable ordinances and rules of If It IN� 17. 6`4
agencies which are hereby made part of this plan. As the owner, I (we) accept full
(`If
responsibility for the construction and operation and maintenance of the proposed facilities. I X
`'ti ' - / \ //X/
I i, ! \ \ r j j 1 ,! // , j `
We) will not attempt to transfer of this responsibility without the written authorization of
/ ;/ f XIST. D v�
N
WE--
SITE S
CONTROL
TOWER DR,
M
S, M�K PKWY / 'y
LOCATION MAP
NOT TO SCALE
New Hanover County."
IM 20.W St ,1 36" FES
\1 I. M FLOOD ZONE:
INV 15.4, ?n 20.18 V 12.0
Signature: CL
Printed Name and Title:
FUTURE
DEVELOPMFkT
Date: 1, j I x 1. 1 '1
EXIST. bl--
XIST. DI 3
RIM 18.2
NEW HANOVER COUNTY I )11!1�
RIM 19.16
AIRPORT LAND "--NV 15.6
EXIST. No. 4 INV IN 15.86
P1\
R14 20.94\ `6 6
R04200-001 -025-000 1 / / i INV OUT 1-2
EXIST. D INV 17 91 6
RIM 14 54 EXIST. DI 1\�. 9% 1LO)
0
`RIM 16.57 - _� -::. 7 ­w� - , -.,- , - I I Z . -4 ' . . 11 1 1 1� 4
INV 11.25 'IN
f N 6'
INV 12,
E 1 EXIST. D, �5 �, r / ' /
19 RIM 18.,,? __4
I I IAn INV.,-1 9
SDM
IM 1� I.E.
F\ , i r l r r / /
--I -&% 'I r.- _� / /
R-C
-7
O�L.
VE AL NATE # 1
NEW HANOVER COUNTY AIRPOR
CORE D I
H(;p
P H INK EM_0VE--56?` D V �,5
if SE6
__ __ ___ _1 - _W 11._", - - EX. S
CANTILE S _A 1,6'\x 1 8.5-xl 8 E. -001 -025-000
Sr C3 -18 XIST, INV. T 5 R04200
amw ` 6
! ' EXIST. SSM EXTEND '1� APPROX. LOCATION
RCP x
FN 7
RIM-;g,.60
r- A. .P., LTERNATE 1 EX. 3 PUBLIC UTILITY
L y DI W20t PIM
71/ ELEV.=9. �f�QP30_�ED CHAINLINK OF ­EjR­AI N- PROP. PRI EASEMENT
C,1W
1 1/ 1: ',1 1 4,NV OtPF,. 5.65 OLLOCT-O�
"5LIDE GATE UTILITY T 20
1 6 4-.-E. 4---Z 0D_
S
FLOOD- 270-N[E- S HEET,.,C 3
12 F,� E... - . 4/ (P
o CI -36 `RCP / f --- ------ ��'o
X,
ANCE EXIST. SSM` 4R4M -44.3- INV. C.
'FE
1-2.04 _W/5Nx5--x12'-- X,-3 &L ; h �. � P
kiM
INV 11.3
I 1�1,.�,_MP
INV 6 E. D. INV. 6. 0 I.1E. = 4.8 4
.74,- "" ""I
2 iW/PROPOSED 7 T
UIDNGLi x/U'x24E.D. 110C-47-IL 1
-
i '")-,X -- zWCFPUA PROJECT # 313806.002/ G w - _.._/ __'� ``.':: \ I F/N/SH FI !WETLANDS POCKET\AXIST. SSMHOOFI I 8,44a SQ. -1. -- -- -- - - RIM 9.16
n:­ I 194
U IV] IN 0. 1.1
171
A
__j RI 9.5 INV IN 0.11 LEGEND
/ / - \ 1 , INV 7 2 EXIS
EXIST. SS
X
RIM 6.61 V X PRO
IINV 1.7
\SAWCUT�: EXIST. ASPHALT OBSERVATION WELL
LIMI
(SEE DETAIL)
�kt ESTO/I`�C TO -ORIGINAL GRADE V
� I TSF TSF
-FLOOD ZONE-- S�E- OPEN CUT DETAIL PROPOSED INFILTRATION BASIN X_ X_ X_ x TEM
BOT ELEV: 7.5
26.84
AE\{EL 8,)/ EXIS
TOB VARIES: 13-19
PRO
\ _ \ �,i # 1t �' - 10' GRASSED WEIR
EL. 11.5
PRO
10' GRASSED EMERGENCY SPILLWAY
XIST. SSMH STO
Z RIM 10.78 EL. 12.0
C.1cp INV 1.13
INV IN 3.11 SKIMMER (SEE DETAIL) PRO
NOTES:
1) CONTRACTOR SHALL FIELD VERIFY SIZE, MATERIAL, INVERTS _ - ~ - - \' //
AND LOCATION OF ALL EXISTING UTILITIES PRIOR TO ORDERING
OR 11N31/ALL11NIU t-MUrU,-.)r_U UTILITIES.
2) NON -.METALLIC PIPES, OTHER THAN GAS LINES SHALL BE
IDENTIFIED BY DETECTABLE WARNING TAPE, MINIMUM 2" WIDE,
WITH LETTERING TO IDENTIFY BURIED LINE BELOW. INSTALL AT A
DEPTH OF 12
WETLANDS POCK
5,951 SQ. �
0. 1.37 AC
VE ALTERNATE #1
INSTALL 890 , LF
7' CHAIN LINK FENCE (TYP)
4/A101
F "B"
FLOOD ZONE \--ZXIST. SSMH
RIM 11.57
AE (EL 8) INV 6" 4.39
NEW HANOVER COUNTY AIRPORT LAND
R04200-001 -025-000
514 Market Street
Wilmington, NC 28401
Tel [phone]
Fax [phone]
TORP , 1 MI-ING P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone [phone] Fax
910-763-5631
@ NC LICENSE No. C- 1427
2014 TRIPP ENGINEERING. P.C.
ess,
S E A L
17374
......... .
o
00
0
al
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p
o
0 Po
UZ�
OPM14
Z
H
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OPM4
C)
U
U
0
�t
0 Uj
Z (9
0 < Z
0 Z Z <
F_ <
TING CONTOUR
JOB NUMBER
13031
PERTY LINE
DRAWN BY
FS OF DISTURBANCE
EJW
PORARY SILT FENCE
CHECKED BY
PGT
TING SPOT ELEVATION
DATE
POSED SPOT ELEVATION
08-17-14
POSED INLET W/INLET PROTECTION
REVISIONS
UPDATED FENCE LINETYPE
RMWATER RUNOFF DIRECTION
FOR ALTERNATE #1, ADDED
ALTERNATE 49 TO ASPHALT
POSED ASPHALT AREA
OVERLAY, WATER AND SEWER
SERVICE LABELS FOR CLARIFICATION
ADDED ENERGY DISSIPATERS, SKIMMEF
& IMPERVIOUS AREAS TO SITE DATA
REV. SAN. SEWER. TIE IN AND INFIL.
BASIN TO PRESERVE SIGNIFICANT TREE
AND TO CLEAR EX. UTILITY ESMT
VALUE ENGINEERING
SITE] PLAN SHEET NUMBER
fe
DA71 E PRINTED 60'
OCT 0 2 20% 1il
60' 30' 0* 60' 120' 180'

SITE WORK NOTE
CAST IRON BOX WITH 4• war. VARIES (6'-8' MIN.) 1. THE CONTRACTOR SHALL VISIT THE SITE AND BECOME FAMILIARIZED WITH EXISTING
LOCKABLE CAP 19-GAUGE HARDWARE CLOTH
(1/4 MESH OPENINGS) AS DIR. BY ENG. CONDITIONS BOTH ON AND IMMEDIATELY ADJACENT TO THE SITE.
SURFACE SEAL A A 2. CLEARING: CONTRACTOR SHALL REMOVE ALL TREES AND VEGETATION WITHIN LIMITS
BASIN BOTTOM_ z _ �_ -- -- ---- STEEL POST
OF CONSTRUCTION UNLESS OTHERWISE DESIGNATED TO REMAIN.
_ _ __- _ _ _ _ _ _ _ _ __- - - _ _ - NCDOT #5 OR # 5ii0%
STEEL POSTS } *. t ., , _ �-r- -r - ; ' ;- - - 3. GRUBBING AND STRIPPING: CONTRACTOR SHALL RAKE AND REMOVE ROOTS, STUMPS,
11-1 I I-111-1 H I,, -1 11-1 I I-1 I L-1 I I I i-1 I I WASHED STONE
v a. WIRE FABRIC VEGETATION, DEBRIS, EXISTING STRUCTURES ABOVE AND BELOW GRADE, ORGANIC
' r�i__-
v v ,�, j T ,� MATERIAL OR ANY OTHER UNSUITABLE MATERIAL WITHIN LIMITS OF CONSTRUCTION.
v(01ti1 Tx „ s FILTER FABRIC 4. MUCKING: CONTRACTOR SHALL COORDINATE WITH OWNER AND THEIR GEOTECHNICAL
V NCDOT #5 OR # 57 _.. rtt l , -_. Z. „ MIN. 12-1 2 GA. o In
CLEAN WASHED COARSE E - - -,_ . `' �r�`1-- �'--- i Q REPRESENTATIVE TO COORDINATE REMOVAL OF ANY SOFT AREAS.
WASHED STONE ''_ '-_._._�.---._.__ INTERMEDIATE WIRESI i<.
SAND OR FINE GRAVEL �.._
_ :_.
- -
'NJiT----f-�-'----M5. DISPOSAL: CLEARED, GRUBBED, STRIPPED OR OTHER WASTE MATERIAL SHALL BEo ;, _REMOVED FROM SITE AND DISPOSED OF IN A PROPERLY PERMITTED FACILITY.GROUNDWATER -3-- ¢ ; - �6. FILL AND COMPACTION SHOULD COMPLY WITH GEOTECHNICAL REPORT.4 0 PERFORATED PVC PIPE I fl�
f I �'- 7. THE CONTRACTOR SHALL NOTE THAT THE GRADING PLAN MAY NOT REPRESENT A BALANCED
SEE PLAN EARTHWORK CONDITION. THE CONTRACTOR SHALL BE RESPONSIBLE FOR CUT AND "
3- N FILL QUANTITIES AND COMPLETE INSTALLATION TO SPECIFIED GRADES. s �'
ANCHOR FABRIC SKIRT 8. THE CONTRACTOR SHALL FURNISH SUITABLE BORROW MATERIAL FROM AN OFF -SITE
BOREHOLE (6" �) CONSTRUCTION SPECIFICATIONS: o AS DIRECTED BY ENGINEER PROPERLY PERMITTED FACILITY AS REQUIRED.n
1. UNIFORMLY GRADE A SHALLOW DEPRESSION APPROACHING 9. THE CONTRACTOR IS RESPONSIBLE FOR THE LOCATION AND PROTECTION OF ALL
SEE PLAN THE INLET. EXISTING UTILITIES DURING CONSTRUCTION. BEFORE COMMENCING ANY EXCAVATIONS
FILTERED
2. DRIVE 5-FOOT STEEL POSTS 2 FEET INTO THE GROUND WATE IN OR ALONG ROADWAYS OR RIGHT-OF-WAYS, PUBLIC AREAS OR IN PRIVATE 514 Market Street
SURROUNDING THE INLET. SPACE POSTS EVENLY AROUND
TILT R FABRIC THE PERIMETER OF THE INLET, A MAXIMUM OF 4 FEET APART. EASEMENTS, THE CONTRACTOR SHALL NOTIFY ALL APPROPRIATE PERSONNEL OF Wilmington, NC 28401
SECTION_ A - A MIRAFI 100 X OR 3. SURROUND THE POSTS WITH WIRE MESH HARDWARE CLOTH.
PPROVED EQUAL) THEIR INTENT TO EXCAVATE, IN WRITING, NOT LESS THAN 10 DAYS PRIOR TO EXCAVATING. Tel - [phone]
SECURE THE WIRE MESH TO THE STEEL POSTS AT THE TOP,
MIDDLE, AND BOTTOM. PLACINGA 2-FOOT FLAP OF WIRE MAINTENANCE: NOTES: 10. THE CONTRACTOR SHALL BE RESPONSIBLE TO COORDINATE DISCONNECTION/ Fax - [phone]
ENERGY DISSIPATOR MESH UNDER THE GRAVEL FOR ANCHORING IS RECOMMENDED.RECONNECTION AND/OR THE RELOCATION OF ALL EXISTING UTILITIES WITH
4. PLACE CLEAN GRAVEL (NCDOT #5 OR #57 STONE) ON A 2:1 INSPECT INLETS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT G INCH 1 . FENCE FABRIC SHALL BE - A MIN. OF 32 IN WIDTH AND APPROPRIATE PERSONNEL.
W OF ANY DEBRIS
SLOPE WITH A HEIGHT OF 16 INCHES AROUND THE WIRE, AND OR GREATER) RAINFALL EVENT. CLEAR THE MESH IRE SHALL HAVE A MIN. OF SIX LINE WIRES WITH 12 STAY
NTS SMOOTH TO AN EVEN GRADE. OR OTHER OBJECTS TO PROVIDE ADEQUATE FLOW FOR SUBSEQUENT RAINS. 11. EXISTING SURVEYING PERFORMED BY DANFORD AND ASSOCIATES AND SUPPLIED BY THE OWNER.
5. ONCE THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED, TAKE CARE NOT TO DAMAGE OR UNDERCUT THE WIRE MESH DURING SPACING. 12. THE CONTRACTOR SHALL FIELD VERIFY ALL DIMENSIONS AT THE SITE. FURTHERMORE
REMOVE ACCUMULATED SEDIMENT, AND ESTABLISH FINAL GRADING ELEVATIONS. SEDIMENT REMOVAL. REPLACE STONE AS NEEDED. 2. FABRIC SHALL BE FOR EROSION CONTROL AND MIN. OF THE CONTRACTOR SHALL REPORT ALL DISCREPANCIES OR QUESTIONS TO THE ENGINEER
6. COMPACT THE AREA PROPERLY AND STABILIZED IT WITH GROUNDCOVER. 36" IN WIDTH. FABRIC SHALL BE FASTENED PRIOR TO INSTALLATION.
OBSERVATION WELL DETAIL. ADEQUATELY TO THE WIRE FABRIC AS DIRECTED BY THE 13. THE CONTRACTOR SHALL PROVIDE ANY AND ALL LAYOUT REQUIRED TO CONSTRUCT '
HARDWARE CLOTH AND GRAVEL INLET PROTECTION ENGINEER. HIS WORK UNLESS OTHERWISE DIRECTED BY OWNER.
NTS N1s 3. STEEL POST SHALL BE 5'-0 IN HEIGHT AND BE OF THE 14. ALL PVC UTILITY MAINS SHALL BE INSTALLED WITH A MINIMUM OF 36" COVER
SELF -FASTENER STEEL ANGLE TYPE. AT FINAL GRADE.
TOP VARIES 15. ALL SERVICE CONNECTIONS SHALL BE INSTALLED TO MEET ALL LOCAL AND STATE CODES.
.� 10' 10'
_ METERS, TAPS, MATERIALS, WORKMANSHIP AND ALL FEES SHALL BE THE RESPONSIBILITY
SEE PLAN
_ _ TEMPORARY SILT -FENCE OF THE CONTRACTOR AND SHALL COMPLY WITH ALL REQUIREMENTS.
16. ALL PAVEMENT, BASE AND SUBGRADE SHALL CONFORM TO NCDOT STANDARDS INCLUDING
- S<p .1 G I I ! NTS WORKMANSHIP, MATERIALS AND EQUIPMENT. APPROPRIATE BARRICADES, SIGNS, LIGHTS
BOTTOM 7.5 TOP OF BANK 13.0 OR OTHER TRAFFIC CONTROL DEVICES SHALL BE PROVIDED IN ACCORDANCE WITH NCDOT p ChestnP C
3 1 BOTTOM OF SPILLWAY 12.0 �P� TO MAINTAIN SAFETY AND TWO WAY TRAFFIC. 419 Chestnut Street
BOTTOM OF WEIR 11.5 Q, Wilmington, North Carolina 28401
17. ALL AREAS SHALL BE GRADED FOR POSITIVE DRAINAGE. THE CONTRACTOR SHALL REPORT
NOTE: 4" OF CLEAN SAND TO BE PLACED IN 2 v ANY DISCREPANCIES TO THE ENGINEER PRIOR TO INSTALLATION. ALL AREAS SHALL BE Phone [phone] Fax
BOTTOM OF INFILTRATION BASIN AT ELEVATION 7.17 Q�� 910-763-5631
SLOPED TO DRAIN AWAY FROM BUILDINGS AT ALL TIMES. NC LICENSE No. C-1427
S� 18. CONCRETE STORM DRAINAGE PIPE SHALL BE CLASS III WITH RUBBER GASKETED JOINTS © 2014 TRIPP ENGINEERING, P.C.
INFILTRATION BASIN DETAIL TOP F BANK AND INSTALLED IN ACCORDANCE WITH MANUFACTURERS REQUIREMENTS.
0 0 19. USE WHITE LANE MARKING PAINT FOR ALL PAVEMENT MARKINGS. PAINT SHALL BE A
NTS GRASSED LINED FS TT-P-115 TYPE 111 FACTORY MIXED QUICK DRYING
BOTTOM OF SPILLWAY Q�J CHLORINATED RUBBER ALKYD,
ARM ASSEMBLY BOTTOM OF WEIR ` NON BLEEDING. REFLECTIVE MATERIAL MAY BE ADDED AT OWNER'S OPTION FOR
.. 3 - NIGHT REFLECTING. 'pkE��gti,•.
3 � _Y
1 +� 11 6 MI 20. DUCTILE IRON SHALL BE CLASS 50. �Q�
"C" ENCLOSURE ,,;,- III- III- i i I=,,,� _
„--,- 2" - 3" ���' 21. CONCRETE FOR WALKS, CURBS AND DRIVES SHALL HAVE A MINIMUM COMPRESSIVE _ S E A L = •
COARSE AGGREGATE- STRENGTH OF 3000 PSI 0 28 DAYS - AIR ENTRAINED.-
:: 22. FIELD TESTING SHALL BE DONE BY AN INDEPENDENT TESTING LABORATORY PAID FOR ;y 17374-\ ,®-
.. COMPACTED SUBGRADE BY THE OWNER. FURTHER TESTING REQUIRED DUE TO A FAILED TEST WILL BE
PAID FOR BY THE CONTRACTOR. 1<1 40'' i ''•���
23. SEE GEOTECHNICAL REPORT NO. DATED BY ORE
WEIR AND EMERGENCY SPILLWAY DETAIL TEMPORARY GRAVELLED -G4
TOP VIEW WATER ENTRY UNIT NTS FOR ADDITIONAL REQUIREMENTS. `' �i i I ► I I I t t t��`
SCEHDULE 40 CONSTRUCTION ENTRANCE CONSTRUCTION SEQUENCE
PVC PIPE VENT PVC PIPE 1. NO CUT SLOPE OR FILL SLOPE SHALL EXCEED A RISE OR FALL OF ONE FOOT FOR
PVC END CAP PVC ELBOW NTS EVERY RUN OF 3 FEET (1 VERTICAL TO 3 HORIZONTAL).
2. NO SEDIMENT WILL BE ALLOWED TO EXIT THE SITE. ALL EROSION SHALL BE CONTROLLED
SITE AREA STABILIZATION STABILIZATION INCLUDING SIDE SLOPES DURING AND AFTER CONSTRUCTION.
WATER SURFACE DESCRIPTION TIMEFF2AME TIMEFRAME 3. INSTALL PRIMARY EROSION CONTROL MEASURES BEFORE BEGINNING CONSTRUCTION INCLUDING
BUT NOT LIMITED TO GRAVELED CONSTRUCTION ENTRANCE, SILT FENCE, CHECK DAMS, ETC. •O
INSTALL ALL EXCEPTIONS
PO
SCHEDULE 40 PERIMETER DIKES, 7 DAYS NONE CONSTRUCTION.
EROSION CONTROL MEASURES AS SOON AS POSSIBLE AFTER BEGINNING �
PVC END CAP PVC PIPE SWALE$, DITCHES 4. ALL EROSION CONTROL MEASURES TO BE INSPECTED AFTER EACH RAIN.
PVC TEE ORIFICE PLATE AND SLOPES SILT FENCE AND INLET PROTECTION ARE TO BE CLEANED WHEN 0.5 FEET OF SEDIMENT HAVE
PVC PIPE �" HOLES
IN UNDERSIDE PVC TEE NOTE1. CONTRACTOR MAY USE BRICK WITH MAX. CORBEL 1" PER COURSE HIGH DUALITY 7 DAYS NONE ACCUMULATED IN FRONT OF THE DEVICE OR WHEN THEY LEAK OR FAIL. SEDIMENT TRAPS ARE Q
FLEXIBLE HOSE 2. CONTRACTOR MAY USE ECCENTRIC M.H. UNIT WATER (HQW) CLEANED OUT AS STATED OR WHEN HALF FULL. 0 O
CONNECTED TO ORIFICE 2 STRAND BARB WIRE ZONES 5. IF APPLICABLE, CONSTRUCT PROPOSED INFILTRATION BASIN TO ACT AS A SEDIMENT BASIN 4
6 W/ 4 POINT BARBS DURING CONSTRUCTION. REMOVE ACCUMULATION OF SILT AS REQUIRED TO ALLOW PROPER
2"X2" AL. SQ. UPRIGHT 4" DIA. ROUND CAP SLOPES STEEPER 7 DAYS IF SLOPES ARE 10' OR FUNCTIONING. RESTORE BASIN TO DESIGN LEVELS Al THE COMPLETION OF CONSTRUCTION. a 00
51'-e BEYOND TYP. AND POST THAN 3:1 LESS IN LENGTH AND 6. IF APPLICABLE, INSTALL DROP INLETS WITH INLET PROTECTION TO ACT AS SILT TRAPS
o , „ OVERALL LENGTH , " ARE NOT STEEPER THAN DURING CONSTRUCTION. REMOVE ACCUMULATED SILT AS NEEDED TO PREVENT SILT FROM
'S COUNTERBALANCE 2:1, 14 DAYS ARE ALLOWED. ENTERING STORM DRAIN PIPING. A
FRONT VIEW 7. A 4" LAYER OF TOPSOIL SHALL BE APPLIED TO ALL NEW AREAS TO BE GRASSED. •A
o ----- GALVANIZED ALUMINUM SLOPES 3:1 OR 14 DAYS 7 DAYS FOR SLOPES ~
END VIEW I CHAIN LINK FENCE FLATTED GREATER THAN 50 FEET 8. ALL DISTURBED AREAS WILL BE STABILIZED WITHIN 21 DAYS OF CEASE OF PHASE OF . 1
PROVIDE LOCKABLE IN LENGTH ACTIVITY. THIS INCLUDES SLOPES, SHALES, STOCKPILES AND OTHER UNSTABILIZED AREAS. O
FAIRCLOTH SKIMMER DETAI L ,� LATCH ASSEMBLY 9. MAINTAIN ALL EROSION CONTROL MEASURES UNTIL PROJECT IS COMPLETE. O O
o � ALL OTHER AREAS 14 DAYS NONE (EXCEPT FOR ��
NTS � _-_ TURNeucKLE 10. MORE STRINGENT ME��SURES MAY BE REQUIRED TO HALT EROSION IF THOSE ON THIS �
P�
WITH SLOPES PERIMETERS AND PLAN PROVE TO BE LESS EFFECTIVE.
�� t1 p , ASSEMBLY FLATTER THAN 4:1 HQW ZONES)al
4 SKIMMER W/3•� bRIFICE oa o 11. REMOVE ALL TEMPORARY EROSION CONTROL MEASURES UPON COMPLETION OF CONSTRUCTION. 0i U
SECURE TRAC CANTILEVER SLIDE GATE I _1_ �-, ALL PERMANENT MEASURES SHALL BE WELL ESTABLISHED PRIOR TO PROJECT COMPLETION. C�
ELEVATION OUTSIDE LOOKING NPDES GROUND STABILIZATION CRITERIA MAINTENANCE PLAN o
SUPPORT RO POST
TO WIRE TO UPPORT PO -CONCRETEi'_4" ANCHORAGE 1. ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CHECKED FOR STABILITY AND
PREVENT SAGGING 24" INTO BOTTOM STAKE TO SUPPORT OPERATION FOLLOWING .EVERY RUNOFF -PRODUCING RAINFALL, BUT IN NO CASE, LESS THAN
OR SIDE WIRE CH AI N LI N K CAN 11LEVER &LI DE GATE LATE %INTER & EARLY SPRING ONCE EVERY WEEK AND WITHIN 24 HOURS OF EVERY HALF INCH RAINFALL.
NTS x TEMPORARY GRASSING DETAIL 2. ALL POINTS OF EGRESS WILL HAVE CONSTRUCTION ENTRANCES THAT WILL BE PERIODICALLY
TOP -DRESSED WITH AN ADDITIONAL 2 INCHES OF 4 STONE TO MAINTAIN PROPER DEPTH. �
PLAN m SEEDING MIXTURE #
THEY WILL BE MAINTAINED IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM LEAVING • 0 N .,
STD. M.H. RING &COVER PRECAST 4" RISER RING m RATE �Ib f aCre� � �� Q
MIN WEIGHTS:. o'er THE SITE. IMMEDIATELY REMOVE OBJECTIONABLE MATERIAL SPILLED, WASHED OR TRACKED
FRAME 208 LBS. � o Rye (grain) 120
COVER: 120 LBS. \�ARSr`f'
AST M.H. UNITS WITH „ v _j Annual lespedeza (Kobe in ONTO THE CONSTRUCTION ENTRANCE OR ROADWAYS. 0 O
a IN P1C� STEPS O 12 OC Piedmont and Coastal Plain, 3. SEDIMENT WILL BE REMOVED FROM HARDWARE CLOTH AND GRAVEL INLET PROTECTION, BLOCK ._
U R Korean in Mountains 50
oT APP o� ) AND GRAVEL INLET, ROCK DOUGHNUT INLET PROTECTION AND ROCK PIPE INLET PROTECTION
omit annual lespedezo when duration of temporary cover is not to extend WHEN THE DESIGNED STORAGE CAPACITY HAS BEEN HALF FILLED WITH SEDIMENT. ROCK WILL
V,,,_, beyond June. BE CLEANED OR REPLACED WHEN THE SEDIMENT POOL NO LONGER DRAINS AS DESIGNED. � �1
r�of&R SAP--- m(n SEEDING DATES: DEBRIS WILL BE REMOVED FROM THE ROCK AND HARDWARE CLOTH TO ALLOW PROPER ' t�
z DRAINAGE. SILT SACKS WILL BE EMPTIED ONCE A WEEK AND AFTER EVERY RAIN EVENT.
OIR MESH OR SIMILAR, STAPLES OR 2"­ Mountains -Above 2500 ft: Feb. is -May i5
FRAME AND GRATE Below 250o ft: Feb. 1-May 1 SEDIMENT WILL BE REMOVED FROM AROUND BEAVER DAMS, DANDY SACKS AND SOCKS Q �
TRENCHED INTO BOTTOM OR SIDE NCDOT STD. NO.DEWEY BROS. MODEL CH-BN-2001 Piedmont - Jan. 1-M 1
„ cn 1 ONCE A WEEK AND AFTER EVERY RAIN EVENT.
M H. STEPS 1 - 1 w 840.15.0 OR OR EQUAL Coastal Plain - Dec. i-Apr. t5
1`-0" oC APPROVED EQUAL ASPHALT PAVEMENT 4. DIVERSION DITCHES WILL BE CLEANED OUT IMMEDIATELY TO REMOVE SEDIMENT OR OBSTRUCTIONS
CROSS SECTION OF POROUS BAFFLE GRO SOIL AMENDMENTS FROM THE FLOW AREA. THE DIVERSION RIDGES WILL ALSO BE REPAIRED. SWALES MUST BE .�.�
TEMPORARILY STABILIZED WITHIN 21 CALENDER DAYS OF CEASE OF ANY PHASE OF
2 NTS ELEV. VARIES Follow recommendations of soil tests or apply 2.000 lb/acre ground ogricul- •�
turol limestone and 750 lb/acre 10-10-10 fertilizer. ACTIVITY ASSOCIATED WITH A SWALE.
CONC. M.H. i i� Iij
10
BAFFLE CONSTRUCTION SPECIFICATION: eLoc.K " " " 5. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCE WHEN IT BECOMES HALF FILLED, �y
1. GRADE THE BASIN SO THAT THE BOTTOM IS LEVEL FRONT TO BACK AND SIDE TO SIDE. 1" " MANH LE DIAM 5 3/4 MULCH THE SEDIMENT FENCE WILL BE REPAIRED AS NECESSARY TO MAINTAIN A BARRIER. STAKES MUST �
2. INSTALL POSTS OR SAW HORSES ACROSS THE WIDTH OF THE SEDIMENT TRAP. N - PRE -CAST CONC. V) BE STEEL. STAKE SPACING WILL BE 6 FEET MAX. WITH THE USE OF EXTRA STRENGTH •�
IARGE TN THE W APPLY 4,000 LB/ACRE STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING,
3. STEEL POSTS SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES SPACED A MAXIMUM OF 4 FEET 8 LARGE PIPE 8 OR A MULCH ANCHORING TOOL A DISK WITH BLADES SET NEARLY STRAIGHT CAN BE FABRIC WITHOUT WIRE BACKING. STAKE SPACING WILL BE 8 FEET MAX. WHEN STANDARD'
APART, AND INSTALLED UP THE SIDES OF THE BASIN AS WELL. THE TOP OF THE FABRIC SHOULD BE o FORM FLOW CHAN E FLOW USED AS A MULCH ANCHORING TOOL '
` > BE STEEL. STAKE SPACING WILL BE 8 FEET MAX. WHEN STANDARD STRENGTH FABRIC
6 INCHES HIGHER THAN THE INVERT OF THE SPILLWAY. TOPS OF BAFFLES SHOULD BE 2 INCHES 4" STANDARD STRENGTH FABRIC AND WIRE BACKING ARE USED. IF ROCK FILTERS ARE
LOWER THAN THE TOP OF THE BERMS. o MAINTENANCE DESIGNED AT LOW POINTS IN THE IN THE SEDIMENT FENCE THE ROCK WILL BE REPAIRED
apt..
4. INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE INLET AND OUTLET DISCHARGE POINT. _ '�' Refertilize if growth is not fully adequate. Reseed, refertilize and mulch im- OR REPLACED IF IT BECOMES HALF FULL OF SEDIMENT, NO LONGER DRAINS AS DESIGNED
BASINS LESS THAN 20 FEET IN LENGTH MAY USE 2 BAFFLES. R `
00 3000 PSI CONC. mediately following erosion or other damage. OR IS DAMAGED.
a d.. a a
_ 5. WHEN USING POSTS, ADD A SUPPORT WIRE OR ROPE ACROSS THE TOP OF THE MEASURE TO a � "a� °� 00 6. SEDIMENT WILL BE REMOVED FROM SEDIMENT TRAPS WHEN THE DESIGNED STORAGE CAPACITY HAS
PREVENT SAGGING. " TEMPORARY SUMMER GRASSING DETAIL BEEN HALF FILLED WITH SEDIMENT. THE ROCK WILL BE CLEANED OR REPLACED WHEN 0
6. WRAP POROUS MATERIAL, LIKE JUTE BACKED BY COIR MATERIAL, OVER A SAWHORSE OR THE TOP 3'-3" MIN. 3 -1 3 MIN. THE SEDIMENT POOL NO LONGER DRAINS OR WHEN THE ROCK IS DISLODGED. BAFFLES
WIRE. HAMMER REBAR INTO THE SAWHORSE LEGS FOR ANCHORING. THE FABRIC SHOULD HAVE FIVE SEE PLAN FOR PIPE SEEDING MIXTURE WILL BE REPAIRED OR REPLACED IF THEY COLLASPE. TEAR, DECOMPOSE OR BECOME Z
ORIENTATION & SIZES
TO TEN PERCENT OPENINGS IN THE WEAVE. ATTACH FABRIC TO A ROPE AND A SUPPORT STRUCTURE C�NC.MH PRECAST MH RINGS �S� RATE INEFFECTIVE. THEY WILL BE REPLACED PROMPTLY. SEDIMENT WILL BE REMOVED WHEN
WITH ZIP TIES, WIRE, OR STAPLES. SECTION SECTION SPECIES
MILLET 40 DEPOSITS REACH HALF THE HEIGHT OF THE 1ST BAFFLE. FLOATING SKIMMERS WILL BE
7. THE BOTTOM AND SIDES OF THE FABRIC SHOULD BE ANCHORED IN A TRENCH OR PINNED WITH INSPECTED WEEKLY AND WILL BE KEPT CLEAN. (n W
8-INCH EROSION CONTROL MATTING STAPLES. IN THE PIEDMONT A10 MotnJTAiNs, ASMALL-STEMMED suNDANGRAss MAY 7. SEDIMENT WILL BE REMOVED FROM THE SEDIMENT BASIN WHEN THE DESIGN STORAGE CAPACITY HAS
1 SUBSTITUTED AT A RATE OF 50 LB/ACRE.
BASIN. CURB I N LET D ETAI L BEEN HALF FILLED WITH SEDIMENT. ROCK WILL BE CLEANED OR REPLACED WHEN THE SEDIMENT - O
8. DO NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE A STORM DRAIN MANHOLE DETAIL SEEDING NOTES POOL NO LONGER DRAINS OR IF THE ROCK IS DISLODGED. BAFFLES WILL BE REPAIRED OR G�
NTS NTS MouNrAlNs -MAY 15-AUG. 15
REPLACED IF THEY TEAR, DECOMPOSE OR BECOME INEFFECTIVE. THEY WILL BE REPLACED Z
WHERE RUNOFF IS DIRECTED PIEDMONT - MAY 1-AUG. 15 PROMPTLY. SEDIMENT WILL BE REMOVED FROM BAFFLES WHEN DEPOSITS REACH HALF W
AWAY FROM CURB GUTTER '- COASTAL PLAN - APR. 15-AUG. 15 THE HEIGHT OF THE 1ST BAFFLE. FLOATING SKIMMERS WILL BE INSPECTED WEEKLY AND
SHALL SLOPE AWAY( AS SHOW '-6» SEE PLAN FOR PIPE WILL BE KEPT CLEAN: C
CLASS A CONC. ORIENTATION SOIL AMENDMENTS 8. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND MULCHED ACCORDING
4" TYPE 1 19.0 B (NCDOT) R 1 ASPHALT Sr PE 3" , 3.,R s FOLLOW LIMESTONE E RECOMMENDATIONS
LB/ACRE TESTS
R APPLY
PP FERTILIZER.
TI2,00 . LB/ACRE GROUND AGRICUL- TO SPECIFICATIONS IN THE VEGETATIVE PLAN TO MAINTAIN A VIGOROUS, DENSE JOB NUMBER
TURAL.MD VEGETATIVE COVER. ALL SLOPES WILL BE STABILIZED WITHIN 21 CALENDER DAYS. ALL
10 ABC STONE (NCDOT) I AS REQUIRED OTHER AREAS WILL BE STABILIZED WITHIN 15 WORKING DAYS. 13031
' 1f8"R , •�� MULCH 9. FLOCCULANTS WILL BE USED TO ADDRESS TURBIDITY ISSUES. THE PUMPS, TANKS, HOSES AND DRAWN BY
• SUPERPAVE SF 9.5A ASPHALT Q� APPLY 4.00o LB/ACRE STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, INJECTION SYSTEMS WILL BE CHECKED FO PROBLEMS OR TURBID DISCHARGES DAILY,
CASTING OR A MULCH ANCHIORING TOOL A DISK WITH BLADES SET NEARLY STRAIGHT CAN BE SPRING -SUMMER EJW
DRAINAGE AWAY FROM CURB NOTE: USE DEWEY BROS. USED AS A MULCH ANCHORING TOOL
00 CRUSHED " 0 Q CH-BN 3A FOR CATCH
o �;`'`� o n s p o :. ^' BASINS AND CH-6N-47 PERMANENT GRASSING DETAIL
� o STONE o n o FOR YARD INLETS CHECKED BY
1=III=III= _ - BASE o MAINTENANCE SEEDING MIXTURE P G T
i I I -I i I -I 0-- " •• �`/� ti, ;,ill=„I [,�;�1i?;III„�III� jU�/T� CONC. COLLAR--------[L IF GROWTH IS NOT FULLY ADEQUATE. RESEED. REFERTILIZE AID MULCH IM- SPMES RATE Ab�d2W
NOTE: PAVEMENT SECTION MAY VARY /�/` MEDIATELY FOLLOWING EROSION OR OTHER DAMAGE.
�,�% COMPACTED ��y,�y,,�, FALL -WINTER PENSACOLA BA,IAGRASS 50 DATE
DEPENDING UPON FIELD CONDITIONS. CLASS A CONC. ��
CONTRACTOR SHALL COORDINATE ASPHALT SLOPE- S 3" „ 2" BACK FILL �,..�" COMMON AN �US 0
PERMANENT GRASSING DETAIL 08-17-14
ENGINEER 0 GEOTECHNICAL
� � .� � 0 TEMPORARY FALL GRASSING DETAIL SEEDING MIXTURE TALL FESCUE so
w a.... a .. ...: , .... +I PLAN REVISIONS
ACTUAL PAVEMENT SECTION. 1/8".°::: �FcP ,4. `- FOR STATE HAY. REPAIR: 2" SURFACE & 8" BASE 1'-0" SEEDING MIXTURE �►� �lltfa SEEDING NOTES R1 UPDATED MOV PAVEMENT SECTION
CONC. COLLAR ASPHALT PAVEMENT TALL FESCUE (BLEND of Iwo oR 1. WHERE A.NEAT APPEARANCE IS DESIRED OMIT SERICEk
FOR STREET &DRIVEWAYS: 2" SURFACE & 8" BASE BARBED WIRE PROVIDE GALVANIZED STEEL S RATE ��� THREE IMPROVED VARIETIES) 200 2. USE COMMON' BERUDAGRASS ONLY ON ISOLATED SITU WHERE IT CANNOT BE ADDED SKIMMER, BAFFLE, GRAVEL
MOV PAVEMENT SECTION DRAINAGE TOWARD CURB FOR PARKING LOT REPAIR: 2 SURFACE & 8 BASE BARB ARMS r ELEV. VARIES Rye (grain) 120 RYE (GRAIN) 25 COME A PEST BERMUDAGRASS MAY BE REPLACED WITH 5 lb/acre CENTIPEDEGRASS. CONSTRUCTION ENTRANCE AND
NTS 3' DIA.GALVANIZED toI I I -4
SEEDING DATES SDMH DETAILS, REV. WEIR ELEV.
PAVEMENT REPAIR DETAIL PSTEEL END CORNER SEEDING NOTES
JANUARY - APRIL SEEDING DATES
N GALVANIZED STEEL 2' 0" AucusT - o1cEMBER 3 VALUE ENGINEERING
MOUNTAINS -AUG. 15-DEC. 15 ARIL 1 -DULY 15
CURB
NTS GALv�i7.ED � BRICK MASONRY Z" t � COASTAL PLAN and PIEDMONT -AUG. 15-oEC 30
SOIL AMENDMENTS
APPLY LIME AND FERTILIZER ACCORDING TO SOIL TESTS. OR APPLY 3.ODD-5.000 lb/ocre SOIL AMENDMENTS
BRACE RAIL GROUND`"AGRICULTURAL LIMESTONE USE THE LOWER RATE ON SANDY SOILS) AND
SOIL AMENDMENTS
TENSION WIRE AS FLOW Q 1,000 Ib/acre 10-10-10 FERTILIZER' APPLY LIME AND FERTILIZER ACCORDING TO SOL TESTS, OR APPLY 3,� lb/acre
REQUIRED " >� FOLLOW SOIL TESTS OR APPLY 2,000 LB/ACRE GROUND AGRICULTURAL GROUND AGRICULTURE LIMESTONE AND 500 lb/acre 10-10-10 FERTILIZER.
! t� LIMESTONE AND 1,000 LB/ACRE 10-10-10 FERTILIZER.
EXISTING GRADE f
MULCH
MULCH
� '..: :..• '•' �•'..:..�••`� N APPLY 4,000 lb/acre GRAN STRAW OR EQtNVALENT COVER OF ANOTHER SURAB(.E MULCH
s MULCH. ANCHOWMRAW BY TACKING WITH -ASPHALT. ROVING, OR NETTING OR BY CRIMP-
3000 PSI CONC. ,• COI APPLY 4,000 LB/ACRE STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, ING WITH A MULCH ANCHORING TOOL. A DISK WITH BLADES SET NEARLY STRAGHT CAN SHEET NUMBER
" 4 i OR A MULCH ANCHORING TOOL A DISK WITH BLADES SET NEARLY STRAIGHT CAN BE APPLY 4.000 Ib/acre GRNN STRAWOR EQUIVALENT COVER OF ANOTHER SURABLE
BE USED AS A MULCH ANCHORING TOOL
c a c USED AS A MULCH ANCHORING TOOL MULCH. ANCHOR BY TACKING WITH ASPHALT, ROVING, OR NETTING OR BY CRIMPING
• WITH A MULCH ANCHORING TOOL A DISK WITH BLADES SET NEARLY STRAIGHT CAN BE -
s CONCRETE POST MAINTENANCE MAINTENANCE USED AS A MULCH ANCHORING TOOL
•_ " ANCHORAGE SECTION
x
MAX Repair and refertilize damaged areas immediately. Topdress with 50 lb/acre FERTILIZE ACCORDING' TO SOL TESTS OR APPLY 40 lblwv NITROGEN IN JA UARY $.
of nitrogen in March. If it is necessary to extend temporary cover and OR FEBRUARY, 40 lb IN SEPTEMBER AND 40 lb IN NOVEMBER, FROM A 12-4-8. MAINTENANCE
DROP IN LET DETAIL
C 3
June 15, overseed with 50 ib/acre Kobe (Piedmont and Coastal Plain 16-4-8, OR SIMILAR TURF FERTILIZER. AVOW FERTILIZER APPLICATIONS DURING
N or Korean (Mountains) lespedezo in tote February or eorly March. WARM WEATHER, AS THIS INCREASES STAND LOSSES TO DISEASE RESEED. FERTILIZE. REFERTILIZE THE FOLLOWING APRIL WITH 50 Ib/acre NITROGEN. REPEAT AS GROWTH a
CHAIN LINK FEN C E _ELEV O NTS AND MUULL D DAMAGED AREAS IMMEDIATELY. MOW TO A HEIGHT OF 2.5-3.5 INCHES REQUIRES. MAY BE MOWED ONLY ONCE YEW. WHERE A NEAT APPEARANCE IS §
DESIRED, OMIT SERKEA AND MOW AS OFTEN AS NEEDED. _
NTS

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NEW HANOVER COUNTY XI RIM 19.16
/1' , I / I EXIST.SDI No. "-NV 17.64 /1
AIRPORT LAND 2\ 3 INV IN 15.86
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EXIST. D 1 9 z
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CANTILEV LIDE G, N, §'�K`18.5`x,18" E
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SEE k
RCPN. __ __ rVI I I- -< 1, A EXTEN0,-'EXIS/T. APPROX.LOCATION
EX. 30 PUBLIC UTILITY
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R WOO �E.�X #1 RINP-2,9.60 pv c
EX. DI #20
ELEV.- 0 EASEMENT HAINLINK i I tj INV Otk, 5.65 0 LL OCT-ak PROP. PRIVATE
SLIDE GATEZQ
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INV. 6.0 JE..=4.84INV 6.74, E.D. W'1 \ ;t t r ' = / / �V`PN, I p it
BU 2G x2 x24 E.D. /PROPOSED .\ 1 - _ ._ /
_-A
ILD11\4
/ / / / / '7 F'N/SH FLOoF� WETLANDS POCKET A
8, 4-4 -3� 'S Q. FT. \ \ - - - s " _
41ft
12-06' ---0.194 ACRES
'N
_j
EXIST. SS ` / -
^ ` , r `' \ \ !' } "J ` I RIM 6�
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--EXIST. SSMH
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RI 9.5 INV IN 0.11
INV
__ \ - I ' / ! 1-1 OBSERVATION WELL
-*CUT EXIST. ASPHALT
Z, ESTORE TO -ORIGINAL I (21RADE (SEE DETAIL)
SEES OPEN CUT; DETAIL
-FLGOD ZONE PROPOSED INFILTRATION BASIN
BOT ELEV: 7.5
0\
AE\ L% A
TOB VARIES: 13-19
/ f + \ / \ \ _ \ %l , -' 10GRASSED WEIR
EL. 12.0
10' GRASSED EMERGENCY SPILLWAY
000/ XIST. SSMH EL. 12.5
'N RIM 10.78
INV 1.13 SKIMMER (SEE DETAIL)
INV IN 3.11
NOTES: . ... .. .. . .... .
1) CONTRACTOR SHALL FIELD VERIFY SIZE, MATERIAL, INVERTS
AND LOCATION OF ALL EXISTING UTILITIES C DDInD TO ORDERING
OR INSTALLING PROPOSED UTILITIES.
2) NON-METALLIC PIPES, OTHER THAN GAS LINES SHALL BE
IDENTIFIED BY DETECTABLE WARNING TAPE, MINIMUM 2" WIDE,
WITH LETTERING TO IDENTIFY BURIED LINE BELOW. INSTALL AT A
DEPTH OF 12
WETLANDS POCK
5,951 SQ.
0.137 AC
�
VE ALTERNATE #1
INSTALL 890 LF
7' CHAIN LINK FENCE (TYP)
4/A101
L
B
FLOOD ZONE \\--EXIST. SSMH
RIM 11.57
AE (EL 8) INV 6" 4.39
NEW HANOVER COUNTY AIRPORT LAND
R04200-001 -025-000,.,
FOR DRAINAGE DIVIDE
PURPOSES ONLY
60' 30' Of
514 Market Street
Wilmington, NC 28401
Tel [phone]
Fax [phone]
TREPP ENGDOMMG, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone [phone] Fax
910-763-5631
@ NC LICENSE No. C-1427
2014 TRIPP ENGINEERING, P.C.
S E A L
17374
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EXISTING CONTOUR
JOB NUMBER
13031
PROPERTY LINE
DRAWN BY
LIMITS OF DISTURBANCE
MLV
TEMPORARY SILT FENCE
CHECKED BY
PGT
EXISTING SPOT ELEVATION
DATE
PROPOSED SPOT ELEVATION
09-22-14
PROPOSED INLET W/INLET PROTECTION
REVISIONS
STORMWATER RUNOFF DIRECTION
PROPOSED ASPHALT AREA
SITE PLAN SHEET NUMBER
1 60"
DDO2
60' 120' 180'
'N
RL
IN
R,
111
Bvi

Johnson, Kelly 1-0 Vf6 1P06J5(-
From: Tripp Engineering [[e-mail]]
Sent: Monday, October 13, 2014 2:31 PM
To: Johnson, Kelly
Cc: 'Monica Valsi; Phillip Tripp
Subject: Wilmington National Guard SW8140906
Attachments: N':DENR Rev Letter - Wilmington National Guard.pdf; Supplement_ Infiltration
Basin Rev.5.pdf; Email Wilmington National Guard.pdf; Wilmington National Guard 1981
Aerial.j pg
Kelly,
Attached please find our response letter to your October 7th comments, the revised infiltration basin supplement, 1981
aerial photo, and copy of an email.
Please let us know if any additional information is needed to proceed with the permit.
Thank you.
Della Baird
Tripp Engineering, P.C.
(p) 910.763,5100
(f) 910.763.5631
[e-mail]
NOTICE: This electronic correspondence and all attachments may contain privileged information intended only for the use of the
addressee. Any information contained within this correspondence is provided for your convenience. No assertion of accuracy is
made by Tripp Engineering, P.C. unless physical documents are obtained, sealed AND signed. User assumes all responsibility for use
of this digital information.

CD
c

TRIPP ENGINEERING, P.C.
41 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
October 13, 2014
NCDENR
Division of Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Kelly Johnson
Re: Wilmington Readiness Center Renovation North Carolina National Guard
Project No. SW8140906
TE 13031
Dear Kelly:
In response to your comments dated October 7, 2014. we offer the following:
1. Supplement:
a. Storage Elevation/Area: Revised supplement is enclosed.
b. Peak Flow: Data has been provided.
2. Plans:
a. Surface Waters: None on site.
b. Existing Impervious Outside the Drainage Area: Please see attached
aerial photo from 1981.
3. Applicant: This is a state not federal facility. LTC Rodney Newton is the
Construction and Facilities Management Officer for the NC National Guard.
Please see the attached email.
Please review for approval and contact us with any questions. comments or if
you need additional information. Thank you.
Sincerely,
Tripp Engineering,. P.C.
6vd,,;
Monica L. Valsi, E.I.
MLV:dcb
Enc.
EGA
OCT 13 2014

RE: Wilmington Readiness Center Renovation North
Carolina National Guard; Stormwater Permit
(UNCLASSIFIED)
Monday, October 13, 2014 1:35 PM
Sul., RE: Wilmington Readiness Center Renovation North Carolina National Guard; Stormwater
Permit (UNCLASSIFIED)
From Williams. Rex W NFG NG NCARNG (US)
To Tripp Engineering
Sent Wednesday, October 08, 2014 3:35 PM
Classification: UNCLASSIFIED
Caveats: NONE
Della:
I think the proper response to Item #3 is as follows. This statement, or something like it, can be inserted
in your comment responses.
"LTC Rodney Newton is the Construction and Facilities Management Officer (director of facilities) for the
North Carolina National Guard. He is legally and fiscally responsible for maintenance, repair and
renovations, and new construction for over 100 National Guard facilities statewide and is the signature
authority for this type of action. Also, this project is at a state-owned facility on state-owned land, not a
federal facility."
Let me know if you think this is OK or suggest something else. Thanks!
Rex W. Williams
Senior Project Manager
North Carolina National Guard
Construction and Facility Management Office
1536 Gold Star Drive, Suite 2600
Raleigh, North Carolina 27607
1-800-621-4136 Ext.46062
Office Phone: [phone]
Mobile Phone: [phone]
Email: [e-mail]
No virus found in this message.
Checked by AVG - www.ave.com
Version: 2014.0.4765 / Virus Database: 4037/8348 - Release Date:10/08/14
ECEIVE
OCT 13 2014
raw

AfflitIMMAWA
RCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Govemor
October 7, 2014
RTC Rodney Newton
State of North Carolina through the
1636 Gold Star Dr.
Raleigh, NC 27607
NC Dept. of Public Safety, NC National Guard
Subject: Request for Additional Information
Stormwater Project No. SW8140906
Wilmington Readiness Center Renovation North Carolina National Guard
New Hanover County
Dear RTC Newton:
John E. Skvada, III
Secretary
The Wilmington Regional Office received and accepted a State Stormwater Management Permit Application for Wilmington
Readiness Center Renovation North Carolina National Guard on September 4, 2014. A preliminary in-depth review of that
information has determined that the application is not complete. The following information is needed to continue the
stormwater review:
Supplement:
Storage Elevation/Area: The supplement shows that at 8.5msl the area is 18,670sf, but this appears to
be the area at 8.0ms1 per the calculations. Please make any necessary corrections.
•-b. Peak Flow: Please provide the data in the peak flow section.
2. Plans:
"•a Surface Waters: If surface waters are present, please show them on the plan with the appropriate
buffer.
Existing Impervious Outside the Drainage Area: There are buildings and other constructed areas
outside of the drainage area to the BMP, and that was likely done because they were probably built in
such a way that a permit was not required and their drainage has been routed around the infiltration
basin. Please verify that the existing impervious area did not need a permit either because it was built
prior to 1988 or because it was built incrementally since 1988 such that it did not require a State
Stormwater permit. This is usually done by providing aerial photographs or building permits, but there
could be other methods.
Applicant: For Federal facilities the individual in charge of the facility signs the permit application, or that
individual can appoint someone to sign on his/her behalf by submitting a letter to that effect. LTC Rodney Newton
has signed the application. Please clarify his role at the facility in order to ensure that he is the appropriate
individual to sign the application and submit supporting documentation.
Please remember that a change to one number may have a domino effect on other numbers. Please check all plans,
calculations and forms to ensure that the numbers are consistent throughout.
Please note that this request for additional information is in response to a preliminary review. The requested information
should be received in this Office prior to November 7, 2014or the application will be returned as incomplete. The return of
a project will necessitate resubmission of all required items, including the application fee.
If you need additional time to submit the information, please mail, email or fax your request for a time extension to the
Division at the address and. fax number at the bottom of this letter. The request must indicate the date by which you expect
to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the
permit.
Division of Energy, Mineral, and Land Resources
Land Quality Section — Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 - [phone] / Fax: [phone]

SW8140906
October 7, 2014
The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion
Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A.
Please reference the State assigned project number on all correspondence. Any original documents that need to be
revised have been sent to the engineer or agent. All original documents must be returned or new originals must be
provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910)
796-7215 or email me at [e-mail].
GDS/kpj: G:1WQ1SharedlStormwaterlPermits & Projects120141140906 HD1201410 addinfo 140906
cc: Phil Tripp, PE
Wilmington Regional Office Stormwater File
Page 2 of 2

10; J112014 Wilmington National Guard
M.'?,J CN and C Values
13031
PRE DEVELOPMENT
Determine Composite CN Value from TR-55 Table 2-2 *Soil Type: Sand
Description HSG
CN
A (ac)
CN x A
Impervious (on -site) -
98
0.00
0.00
Wooded A
45
1.57
70.66
1.57
70.65
Composite CN Value =
45
Pre Development Composite Runoff Coefficient
Description C
A (ac)
C x A
Impervious 0.95
0.00
0
Wooded 0.15
1.57
0.2355
1.57
0.2355
Composite C Value = 0.15
POST DEVELOPMENT
Determine Composite CN Value from TR-66 Table 2-2 *Soil Type: Sand
Description HSG
CN A (ac)
CN x A
Impervious
98 3.41
334.18
Open Space (Fair) A
39 1.96
76.44
5.37
410.62
Composite CN Value = 76
Post Development Composite Runoff Coefficient
Description C A (ac) C x A
Impervious 0.95 3.41 3.2395
Lawns, sandy soil, flat 0.15
1.96 0.294
5.37 3.5335
Composite C Value = 0.66
Total Drainage Area
s . ft.
acres
233,947
5.37
Post Development Im ervious Area
Land Use
-sq. ft.
acres
Proposed Impervious
48,210
1.11
Existing Impervious
40,405
0.93
Future Impervious
59,950
1.38
Total
148, 665
3.41
01110111111
CAR 04 ��i,�
���•........... �N
`� � •.• �SS(QN .• 9 ii
314
(o-o1• t4
% impervious = 0.635
= 63.5%
EC%EIVE
OCT 032014 x
BY. .,
G:IJOBS12013113031-Wilmington National Guard\Calcs%CN & C Value Calcs

10/01/2014 Wilmington National Guard MV: Simple Method -1.5" Storage Volume Calculations 13031
Storage Volume - Non SA Waters - Minimum Volume Required
Volume of Runoff = V = (3630) (Design Rainfall Depth) (Rv) (Drainage Area)
where
Rv= 0.05+0.009(IA)
Rv = Runoff Coefficient = storm runoff (inches) / storm rainfall (inches)
IA = Impervious Fraction = Impervious portion of the drainage area (acres) / Drainage area (acres)
IA= 63.5 %
Rv = 0.62
Design Rainfall Depth = 1.50 in.
Drainage Area = 5.37 acres
Volume Required = 18.172 ff'
Volume Provided = 18.232 ft'
G:VOBS\2013\13031-Wilmington National Guard\Calcs\13031-Storage Volume Calcs 1.5inch

r �
10/1/2014
MLV
WATERSHED DATA
BEFORE DEVELOPMENT
WATERSHED AREA
1.57 ACRES
RUNOFF COEF. 'C'
0.15
TIME OF CONCEN R
10.00 MIN
INTENSITY 10 YR
6.43 IN/HR
Qa = 1.51 CFS
Qa = PRE -DEVELOPED PEAK DISCHARGE
COMPUTE DEPTH OF RUNOFF
P = 7 INCHES 10yr, 24hr PRECIPITATION
CN = 76
S = (1000/CN)-10
S = 3.16
Depth (D) = (P-0.2S)A2/(P+0.8S)
D = 4.26 IN - 10yr, 24hr RUNOFF DEPTH
SET VOLUME AND COMPUTE TIME TO PEAK
Tp = [(43.5)(D)(Area)] / Qp
Tp = 38.81 MINUTES
Storage Volume Req'd = (Qp-Qa)•Tp"1.39'60
78,039 cu.ft.
CALCULATE Ks AND b
BOTTOM INFILTRATION ELEVATION Al 7.50 feet
Wilmington National Guard
Stormwater Infiltration Basin Routing
10-year 24hr Storm
Half infiltration rate
AFTER DEVELOPMENT
WATERSHED AREA
5.37 ACRES
RUNOFF CIDER 'C'
0.66
TIME OF CONCENTR
5.00 MIN
INTENSITY 10 YR
7.23 IN/HR
Qp = 25.62 CFS
Op = POST -DEVELOPED PEAK DISCHARGE
S
Z
CONTOUR
INCR
ACCUM
CONTOUR
AREA
VOL
VOL
STAGE
In S
In Z
Z est
(sq ft)
(cu ft)
(cu ft)
(ft)
(ft)
7.50
17794
0
0
0
0
0
0
8.00
18670
18,232
18,232
0.5
9.8109-0.69314718
0.55
9.00
20482
19,576
37,808
1.5
10.5403
0.4055
1.33
10.00
22374
21,428
59,236
2.5
10.9893
0.9163
2.27
11.00
24347
23,361
82,597
3.5
11.3217
1.2528
3.39
12.00
26400
25,374
107,970
4.5
11.5896
1.5041
4.68
13.00
28534
27,467
135,437
5.5
11.8163
1.7047
6.14
Regression Output:
==> Ks = 29874
b = 0.83
X Coefficient 10.30
.3031
G:U08MO13113031-Wilmington National Guard%Ca1cs113031 Infiltration Routing 10y24hr half:nfil

10/1/2014 Wilmington National Guard 13031
MLV Stormwater Infiltration Basin Routing
10-year 24hr Storm
Half infiltration rate
CHAINSAW METHOD FOR
RISER BARREL ROUTING
STORM DATA
Qa =
1.51 cis
QP =
25.62 cfs
* Infiltration rate 0 6 In/hr
*Half of Infiltration Rate shown to prove that
Tp =
38.8 min
(Per Soils Report)
system can
infiltrate without discharge to waive
dT =
BASIN DATA
4 min
Basin Drawdown Time = 3.03 days
the NCDENR offline bypass & vegetated filter
Ks =
29874
strip requirements
b =
0.83
Zo =
7.50 ft
Normal water eiev =
7.50 ft
Peak Outflow =
0.00 cfs
Weir Length =
ft
Peak Stage =
10.77 ft
Cw =
3.0
Maximum Storage =
80,058 cu ft
Zcr=
ft
Control Holes:
State Orifice:
Dia =
0.00 in
Dd =
in
Inv =
0.00 It
Cd =
0.6
Weir:
L =
120 in
ZI =
ft
Inv =
11.5 ft
Emergency Spillway L =
120 in
Inv =
12.00 ft
Emergency
Time
Inflow
Storage
Stage
Outflow W Riser Barrel
Spillway
Orifice
Weir
IFStore
Infiltrate
(min)
(Cis)
Cu ft)
(ft)
(cfs)
(cfs)
(Cfs)
(CIS)
(cfs)
(Cfs)
(cu ft)
(cf)
0
0.0
0
7.50
0
0
0
0.00
0
0.00
0.0
0.0
4
0.7
0
7.50
0
0.00
0
0.00
0
0.00
0.0
59.3
8
9 R
160
7.50
0.00
0.00
0.0
0.00
0.00
0.00
41.2
118.6
12
5.6
782
7.51
0.00
0.00
0.0
0.00
0.00
0.00
604.4
177.9
16
9.3
2122
7.54
0.00
0.00
0.0
U.00
0.00
0.00
1885.2
237.3
20
13.4
4361
7.59
0.00
0.00
0.0
0.00
0.00
0.00
4064.0
296.6
24
17.5
7584
7.68
0.00
0.00
0.0
0.00
0.00
0.00
7227.7
355.9
28
21.0
11776
7.81
0.00
0.00
0.0
0.00
0.00
0.00
11360.8
415.2
32
23.7
16822
7.98
0.00
0.00
0.0
0.00
0.00
0.00
16347.3
474.5
36
25.3
22516
8.19
0.00
0.00
0.0
0.00
0.00
0.00
21982.4
533.8
40
25.6
28587
8.42
0.00
0.00
0.0
0.00
0.00
0.00
27993.8
593.1
44
24.5
34723
8.67
0.00
0.00
0.0
0.00
0.00
0.00
34070.1
652.4
48
22.2
40605
8.92
0.00
0.00
0.0
0.00
0.00
0.00
39893.3
711.8
52
19.5
45943
9.14
0.00
0.00
0.0
0.00
0.00
0.00
45171.6
771.1
56
17.0
50619
9.35
0.00
0.00
0.0
0.00
0.00
0.00
49788.6
830.4
60
14.9
54709
9.53
0.00
0.00
0.0
0.00
0.00
0.00
53819.1
889.7
64
13.0
58286
9.69
0.00
0.00
0.0
0.00
0.00
0.00
57336.8
949.0
68
11.4
61414
9.83
0.00
0.00
0.0
0.00
0.00
0.00
60406.0
1008.3
72
10.0
64150
9.95
0.00
0.00
0.0
0.00
0.00
0.00
63082.8
1067.6
76
8.7
66543
10.06
0.00
0.00
0.0
0.00
0.00
0.00
65416.5
1127.0
80
7.6
68636
10.16
0.00
0.00
0.0
0.00
0.00
0.00
67450.2
1186.3
84
0.7
70467
10.24
0.00
0.00
0.0
0.00
0.00
0.00
69221.4
1245.6
88
5.8
72008
10.32
0.00
0.00
0.0
0.00
0.00
0.00
70763.1
1304.9
92
5.1
73468
i U.38
0.00
0.00
0.0
0.00
0.00
0.00
72104.0
1364.2
96
4.5
74693
10.44
0.00
0.00
0.0
0.00
0.00
0.00
73269.3
1423.5
100
3.9
75764
10.49
0.00
0.00
0.0
0.00
0.00
0.00
74281.1
1482.8
104
3.4
76701
10.53
0.00
0.00
0.0
0.00
0.00
0.00
76158.5
1542.1
108
3.0
77520
10.56
0.00
0.00
0.0
0.00
0.00
0.00
75918.5
1601.5
112
2.6
78237
10.60
0.00
0.00
0.0
0.00
0.00
0.00
76576.7
1660.8
116
2.3
78863
10.62
0.00
0.00
0.0
0.00
0.00
0.00
77143.1
1720.1
120
2.0
79411
10.65
0.00
0.00
0.0
0.00
0.00
0.00
77631.9
1779.4
124
1.7
79891
10.67
0.00
0.00
0.0
0.00
0.00
0.00
78052.0
1838.7
128
1.5
80310
10.69
0.00
0.00
0.0
0.00
0.00
0.00
78411.9
1898.0
132
136
1.3
80677
10.70
0.00
0.00
0.0
0.00
0.00
0.00
78719.3
1957.3
1.2
80997
10.71
0.00
0.00
0.0
0.00
0.00
0.00
78980.7
2016.7
140
1.0
81278
10.72
0.00
0.00
0.0
0.00
0.00
0.00
79201.9
2076.0
144
0.9
81523
10.73
0.00
0.00
0.0
0.00
0.00
0.00
19387.9
2135.3
148
0.8
81738
10.74
0.00
0.00
0.0
0.00
0.00
0.00
79543.2
2194.6
152
0.7
81925
10.75
0.00
0.00
0.0
0.00
0.00
0.00
79671.5
2253.9
156
0.6
82090
10.75
0.00
0.00
0.0
0.00
0.00
0.00
79776.3
2313.2
160
0.5
82233
10.76
0.00
0.00
0.0
0.00
0.00
0.00
79860.5
2372.5
164
0.5
82359
10.76
0.00
0.00
0.0
0.00
0.00
0.00
79926.8
2431.8
168
172
0.4
82468
10.76
0.00
0.00
0.0
0.00
0.00
0.00
79977.3
2491.2
176
0.3
82564
10.76
0.00
0.00
0.0
0.00
0.00
0.00
80014.0
2550.5
180
0.3
82648
10.76
0.00
0_0o
0.0
0.00
0.00
0.00
80038.7
2609.8
184
0.3
82722
10.77
0.00
0.00
0.0
0.00
0.00
0.00
80052.8
2669.1
0.2 82786
GM08M2013113031-Wilmington National Guardr,81os113031
10.77 0.00 0.00
Infilta"on Routing 10y24hr half Infll
0.0
0.00
0.00
0.00
80067.7
2728.4
__11 LL
Cr-

10/1/2014 Wilmington National Guard 13031
MLV Stormwater Infiltration Basin Routing
10-year 24hr Storm
Half infiltration rate
192
196
0.2
0.2
82891
10.77
0.00
0.00
0.0
0.00
0.00
0.00
80044.4
2847.0
200
0.1
82934
82972
10.76
10.76
0.00
0.00
0.00
0.0
0.00
0.00
0.00
80028.1
2906.4
204
0.1
83005
10.76
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
80006.4
2965.7
208
0.1
83034
10.76
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
79979.9
3025.0
212
0.1
83059
10.76
0.00
0.00
0.0
0.00
0.00
0.00
0.00
79949.4
79915.2
3084.3
3143.6
216
220
0.1
0.1
83081
10.76
0.00
0.00
0.0
0.00
0.00
0.00
79877.9
3202.9
224
0.1
83100
83117
10.76
10.75
0.00
0.00
0.0
0.00
0.00
0.00
79837.8
3262.2
228
0.1
83132
10.75
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
79795.3
3321.5
232
0.0
83144
10.75
0.00
0.00
0.0
0.0
0.00
0.00
0.00
79750.7
3380.9
236
0.0
83156
10.75
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
79704.3
3440.2
240
0.0
83166
10.74
0.00
0.00
0.0
0.00
0.00
0.00
79656.2
79606.8
3499.5
3558.8
244
248
0.0
0.0
83174
10.74
0.00
0.00
0.0
0.00
0.00
0.00
79556.1
3618.1
252
0.0
83182
83188
10.74
10.74
0.00
0.00
0.0
0.00
0.00
0.00
79504.3
3677.4
256
0.0
83194
10.73
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
79451.6
3736.7
260
0.0
83199
10.73
0.00
0.00
0.0
0.0
0.00
0.00
0.00
79398.0
3796.1
264
0.0
83204
10.73
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
79343.7
79288.8
3855.4
268
272
0.0
83207
10.73
0.00
0.00
0.0
0.00
0.00
0.00
79233.4
3914.7
3974.0
276
0.0
0.0
83211
10.72
0.00
0.00
0.0
0.00
0.00
0.00
79177.4
4033.3
280
0.0
83214
83216
10.72
10.72
0.00
0.00
0.0
0.00
0.00
0.00
79121.1
4092.6
284
0.0
83219
10.71
0.00
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
79064.3
4151.9
288
0.0
83220
10.71
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
79007.3
78949.9
4211.2
292
296
0.0
83222
10.71
0.00
0.00
0.0
0.00
0.00
0.00
78892.3
4270.6
4329.9
300
0.0
0.0
83224
10.71
0.00
0.00
0.0
0.00
0.00
0.00
78834.5
4389.2
304
0.0
83225
83226
10.70
10.70
0.00
0.00
0.0
0.00
0.00
0.00
78776.5
4448.5
308
0.0
83227
10.70
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
78718.4
4507.8
312
0.0
83228
10.69
0.00
0.00
0.0
0.0
0.00
0.00
0.00
78660.1
4567.1
316
0.0
83229
10.69
0.00
0.00
0.0
0.00
0.00
0.00
78601.6
4626.4
320
0.0
83230
10.69
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
78543.1
78484.5
4685.8
324
328
0.0
83230
10.09
0.00
in nn
0.0
0.00
0.00
0.00
78425.7
4745.1
4804.4
332
0.0
0.0
83231
83231
10.68
0.00
0.00
0.0
0.00
0.00
0.00
78366.9
4863.7
336
0.0
83231
10.68
10.68
n.nn
0.00
0.00
0.00
0.0
0.00
0.00
0.00
78308.1
4923.0
340
0.0
83232
10.67
0.00
0.00
0.0
0.0
0.00
0.00
0.00
78249.2
4982.3
344
0.0
83232
10.67
0.00
0.00
0.0
0.00
0.00
0.00
78190.2
5041.6
348
0.0
83232
10.67
0.00
0.00
0.0
0.00
0.00
0.00
78131.2
5100.9
352
0.0
83233
10.67
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
78072.1
78013.1
5160.3
5219.6
356
360
0.0
0.0
83233
10.66
0.00
0.00
0.0
0.00
0.00
0.00
77953.9
5278.9
364
0.0
83233
83233
10.66
10.66
0.00
0.00
0.0
0.00
0.00
0.00
77894.8
5338.2
368
0.0
83233
10.65
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
77835.6
5397.5
372
0.0
83233
10.65
0.00
0.00
0.0
0.0
0.00
0.00
0.00
0.00
77776.5
5456.8
376
0.0
83234
10.65
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
77717.3
77658.1
5516.1
5575.5
380
384
0.0
0.0
83234
10.65
0.00
0.00
0.0
0.00
0.00
0.00
77598.8
5634.8
388
0.0
83234
83234
10.64
10.64
0.00
0.00
0.0
0.00
0.00
0.00
77539.6
5694.1
392
0.0
83234
10.64
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
77480.4
5753.4
396
0.0
83234
10.63
0.00
0.00
0.0
0.0
0.00
0.00
0.00
77421.1
5812.7
400
0.0
83234
10.63
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
77361.8
77302.6
5872.0
5931.3
404
408
0.0
0.0
83234
10.63
0.00
0.00
0.0
0.00
0.00
0.00
77243.3
5990.6
83234
10.63
0.00
0.00
0.0
0.00
0.00
0.00
77184.0
6050.0
G:UOBS12013\13031-Wilmington National GuaMlCalcAll3031 Infiltration Routing 10y24hr haU intiii

9/2a/2014 Wilmington National Guard 13031
MLV Stormwater Infiltration Basin Routing
25-year 24hr Storm
WATERSHED DATA
BEFORE DEVELOPMENT
WATERSHEDAREA
1.57 ACRES
RUNOFFCOEF.'C'
0.15
TIME OF CONCENTR
10.00 MIN
INTENSITY 25 YR
7.22 IN/HR
Qa = 1.70 CFS
Qa = PRE -DEVELOPED PEAK DISCHARGE
COMPUTE DEPTH OF RUNOFF
P = 8.05 INCHES 25yr, 24hr PRECIPITATION
CN = 76
S = (1000/CN)-10
S = 3.16
Depth (D) = (P-0.2S)A2/(P+0.8S)
D = 5.20 IN - 25yr, 24hr RUNOFF DEPTH
SET VOLUME AND COMPUTE TIME TO PEAK
Tp = [(43.5)(D)(Area)] / Qp
Tp = 42.08 MINUTES
Storage Volume Req'd = (Qp-Qa)'Tp'1.39'60
95,405 cu. ft.
CALCULATE Ks AND b
BOTTOM INFILTRATION ELEVATION Al 7.50 feet
AFTER DEVELOPMENT
WATERSHED AREA
5.37 ACRES
RUNOFF COEF. 'C'
0.56
TIME OF CONCENTR
5.00 MIN
INTENSITY 25 YR
8.15 IN/HR
Qp = 28.89 CFS
Qp = POST -DEVELOPED PEAK DISCHARGE
S
Z
CONTOUR
INCR
ACCUM
CONTOUR
AREA
VOL
VOL
STAGE
Ins
In Z
Z est
(sq ft)
(Cu ft)
(cu ft)
(ft)
(ft)
7.50
17794
0
0
0
0
0
0
8.00
18670
18.232
18,232
0.5
9.8109-0.69314718
0.55
9.00
20482
19,576
37,808
1.5
10.5403
0.4055
1.33
10.00
22374
21,428
59,236
2.5
10.9893
0.9163
2.27
11.00
24347
23.361
82,597
3.5
11.3217
1.2528
3.39
12.00
26400
25,374
107,970
4.5
11.5896
1.5041
4.68
13.00
28534
27,467
135,437
5.5
11.8163
1.7047
6.14
Regression Output:
==> Ks = 29874
b = 0.83
X Coefficient 10.30
G:UOBS12013113031-Wilmington National GuarMC2lcs113031 Infiltration Routing 25yr24hr

9126'12914 Wilmington National Guard
MLV Stormwater Infiltration Basin Routing 13031
25-year 24hr Storm
CHAINSAW METHOD FOR
RISER BARREL ROUTING
STORM DATA
Qa =
1.70 cfs
QP =
28.89 cis
' inffitration rate 1.2 in/hr
TP =
42.1 min
(Per Soils Report)
dT =
4 min
BASIN DATA
Basin Drawdown
Time = 1.85 days
Ks =
29874
b =
0.83
Zo =
7.50 ft
Normal water elev =
7.50 It
Peak Outflow=
0.23cfs
Weir Length =
ft
Peak Stage =
11.52 It
Cw =
3.0
Maximum Storage =
95,187 cu It
Zcr =
It
Control Holes:
State Orifice: Dia -
0.00 in
Dd =
in
Inv
0.00 ft
Cd =
0.6
Weir: L
120 in
Zi =
It
Inv
11.5 ft
Emergency Spillway L
120 in
Inv =
12.00 It
Emergency
Time
(min)
Inflow
Storage
Stage
Outflow
W Riser
Barrel
Spillway
Orifice
Weir
IFStore
Infiltrate
(cfs)
(cu ft)
(ft)
(Cfs)
(cfs)
(cfs)
(cfs)
(Cfs)
(Es)
ICU ft)
(0
0
4
0.0
0.6
0
7.50
0
0
0
0.00
0
0.00
0.0
0.0
8
2.5
0
153
7.50
7.50
0
0.00
0.00
0.00
0
0.00
0
0.00
0.0
118.6
12
5.4
753
7.51
0.00
0.00
0.0
0.0
0.00
a nn
0.00
0.0
237.3
16
9.1
2054
7.53
0.00
0.00
0.0
0.00
n.r)n
0.00
0.00
0.00
0.00
397.6
1579.4
355.9
474.5
2u
24
13.3
17.6
4246
7.58
0.00
0.00
0.0
0.00
0.00
0.00
3653.3
593.1
26
21.6
7444
11670
7.67
7.B0
0.00
0.00
0.00
0.0
0.00
0.00
0.00
6732.1
711.8
32
25.0
16857
7.97
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
10839.4
830.4
36
27.4
22854
8.18
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
15908.2
21785.9
949.0
40
44
28.7
29435
8.44
0.00
0.00
0.0
0.00
0.00
0.00
28248.8
1067.6
1186.3
48
26.7
27.5
36326
43223
8.71
9.00
0.00
0.00
0.0
0.00
0.00
0.00
35020.9
1304.9
52
25.1
49822
9.28
0.00
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
41799.2
1423.5
56
22.2
55847
9.54
0.00
0.00
0.0
0.00
0.00
0.00
48279.9
1542.1
60
19.6
61180
9.78
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
54185.8
1660.8
64
17.4
65894
10.00
0.00
0.00
0.0
0.00
0.00
0.00
n fin
59400.9
63996.0
'1779.4
1898.0
68
72
15.3
13.6
70060
73741
10.19
0.00
0.00
0.0
0.00
0.00
0.00
68043.2
2016.7
76
12.0
76995
10.36
10.51
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
71606.1
2135.3
80
10.6
79870
10.64
0.00
0.00
0.0
0.0
0.00
0.00
0.00
0.00
74741.0
2253.9
84
9.4
82411
10.76
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
77497.8
79920.3
2372.5
2491.2
88
92
8.3
7.3
84657
10.86
0.00
0.00
0.0
0.00
0.00
0.00
82047.4
2609.8
96
6.5
86642
88396
10.96
11.04
0.00
0.00
0.0
0.00
0.00
0.00
83913.5
2728.4
100
5.7
89946
11.11
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
85548.8
2847.0
104
5.0
91316
11.17
0.00
0.00
0.0
0.0
0.00
0.00
0.00
86980.3
2965.7
108
4.5
92527
11.22
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
0.00
88231.6
89323.6
3084.3
112
116
3.9
3.5
93596
11.27
0.00
0.00
0.0
0.00
0.00
0.00
90274.9
3202.9
3321.5
120
3.1
94542
95378
11.31
11.35
0.00
0.00
0.0
0.00
0.00
0.00
91101.8
3440.2
124
2.7
96116
11.38
0.00
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
91 R1 R R
3558.8
128
2.4
96769
11.41
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
92438.7
3677.4
132
2.1
97346
11.43
0.00
0.00
0.0
0.00
0.00
0.00
0.00
92972.7
93430.9
3796.1
3914.7
136
140
1.9
1.7
97855
11.45
0.00
0.00
0.0
0.00
0.00
0.00
93822.0
4033.3
144
1.5
98306
98704
11.47
0.00
0.00
0.0
0.00
0.00
0.00
94153.9
4151.9
148
1.3
99056
11.48
11.49
0.00
0.00
0.00
0.0
0.00
0.00
000
94433.4
4270.6
152
1.1
99367
11.50
0.02
0.00
0.00
0.0
0.0
0.00
0.00
0.00
94666.6
4389.2
156
1.0
99637
11.51
0.10
0.00
0.0
0.00
0.00
0.02
94858.9
4507.8
160
0.9
99857
11.52
0.17
0.00
0.0
0.00
0.00
0.00
0.00
0.10
0.17
95010.9
4626.4
164
0.8
100031
11.52
0.21
0.00
0.0
0.00
0.00
0.21
95111.8
95167.1
4745.1
4863.7
168
172
0.7
100169
11.52
0.23
0.00
0.0
0.00
0.00
0.23
95186.7
4982.3
176
0.6
0.5
100281
100375
11.52
11.52
0.23
0.00
0.0
0.00
0.00
0.23
95180.1
5100.9
180
0.5
100457
11.52
0.20
0.17
0.00
0.00
0.0
0.0
0.00
0.00
0.20
95155.5
5219.6
184
0.4
100531
11.51
0.14
0.00
0.0
0.00
0.00
0.17
95118.6
5338.2
G:UOBS12013X13031-Wilmington National GuardlCalcs%l
3031 infiltration Routing 25y24hr
0.00
0.00
0.14
95073.7
5456.8

9/26/2014 Wilmington National Guard
MLV Stormwater Infiltration Basin Routing 13031
25-year 24hr Storm
192
196
0.3
0.3
100664
11.51
0.07
0.00
0.0
0.00
0.00
0.07
94970.1
5694.1
200
0.3
100727
100787
11.51
11.50
0.04
0.02
0.00
0.0
0.00
0.00
0.04
94914.1
5812.7
204
0.2
100846
11.50
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.02
94856.1
5931.3
20B
0.2
100901
11.50
0.00
0.00
0.0
0.00
0.00
0.00
94795.9
6050.0
212
0.2
100950
11.49
0.00
0.00
0.0
0.00
0.00
0.00
94732.2
6168.6
216
0.2
100993
11.49
0.00
0.00
0.0
0.00
n nn
0.00
94662.3
6287.2
220
0.1
101031
11.49
0.00
0.00
0.0
0.00
0.00
0.00
94686.7
6405.8
224
0.1
101064
11.48
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
94506.2
6524.5
228
0.1
101094
11.48
0.00
0.00
0.0
0.00
0.00
0.00
0.00
94421.2
94332.3
6643.1
232
236
0.1
101120
11.47
0.00
0.00
0.0
0.00
0.00
0.00
94236.9
6761.7
6880.3
240
0.1
0.1
101143
101164
11.47
11.46
0.00
0.00
0.0
0.00
0.00
0.00
94144.5
6999.0
244
0.1
101182
11.46
0.00
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
94046.4
7117.6
24B
0.1
101198
11.45
0.00
0.00
0.0
0.00
0.00
0.00
93945.9
7236.2
252
0.1
101212
11.45
0.00
0.00
0.0
0.00
0.00
0.00
93843.3
7354.9
256
0.0
101225
11.44
0.00
0.00
0.0
0.00
0.00
0.00
93738.8
7473.5
260
0.0
101236
11.44
0.00
0.00
0.0
0.00
0.00
0.00
93632.7
7592.1
264
0.0
101246
11.43
0.00
0.00
0.0
0.00
0.00
0.00
93525.1
7710.7
268
0.0
101254
11.43
0.00
0.00
0.0
0.00
0.00
0.00
93416.2
7829.4
272
0.0
101262
11.42
0.00
0.00
0.0
0.00
0.00
0.00
93306.3
7948.0
276
0.0
101269
11.41
0.00
0.00
0.0
0.00
0.00
0.00
93195.3
8056.6
280
0.0
101275
11.41
0.00
0.00
0.0
0.00
0.00
0.00
0.00
93083.4
8185.2
284
0.0
101280
11.40
0.00
0.00
0.0
0.00
0.00
0.00
0.00
92970.7
8303.9
288
0.0
101285
11.40
0.00
0.00
0.0
0.00
0.00
0.00
0.00
92857.4
92743.4
8422.5
292
0.0
101289
11.39
0.00
0.00
0.0
0.00
0.00
0.00
92628.9
8541.1
8659.7
296
300
0.0
101292
11.39
0.00
0.00
0.0
0.00
0.00
0.00
92513.9
8778.4
304
0.0
0.0
101295
101298
11.38
11.37
0.00
0.00
0.0
0.00
0.00
0.00
92398.5
8897.0
308
0.0
101301
11.37
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
92282.7
9015.6
312
0.0
101303
11.36
0.00
0.00
0.0
0.0
0.00
0.00
0.00
92166.6
9134.3
316
0.0
101305
11.36
0.00
0.00
0.0
0.00
0.00
0.00
92050.2
9252.9
320
0.0
101307
11.35
0.00
0.00
0.0
0.00
0.00
0.00
91933.5
9371.5
324
0.0
101308
11.34
0.00
0.00
0.0
0.00
0.00
0.00
91816.6
9490.1
328
0.0
101310
11.34
0.00
0.00
0.0
0.00
0.00
0.00
91699..S
9608.8
332
0.0
101311
11.33
0.00
0.00
0.0
0.00
0.00
0.00
91582.2
9727.4
33E
0.0
101312
11.33
0.00
0.00
0.0
0.00
0.00
0.00
0.p0
91464.8
9846.0
340
0.0
101313
11.32
0.00
0.00
0.0
0.00
0.00
0.00
0.00
91347.2
9964.6
344
0.0
101314
11.31
0.00
0.00
0.0
0.00
0.00
0.00
0.00
91229.5
91111.7
10083.3
348
352
0.0
101314
11.31
0.00
0.00
0.0
0.00
0.00
0.00
90993.8
10201.9
10320.5
356
0.0
0.0
101315
101316
11.30
11.30
0.00
0.00
0.0
0.00
0.00
0.00
90875.9
10439.1
360
0.0
10131E
11.29
0.00
0.00
0.00
0.00
0.0
0.00
0.00
0.00
90757.8
10557.8
364
0.0
101317
11.28
0.00
0.00
0.0
0.0
0.00
0.00
0.00
90639.7
10676.4
368
0.0
101317
11.28
0.00
0.00
0.0
0.00
0.00
0.00
0.00
90521.5
10795.0
372
0.0
101317
11.27
0.00
0.00
0.0
0.00
0.00
0.00
0.00
90403.3
10913.7
376
0.0
101318
11.27
0.00
0.00
0.0
0.00
0.00
0.00
0.00
90285.0
11032.3
380
0.0
101318
11.26
0.00
0.00
0.0
0.00
0.00
0.00
90166.7
90048.3
11150.9
384
388
0.0
101318
11.26
0.00
0.00
0.0
0.00
0.00
0.00
89929.9
11269.5
11388.2
392
0.0
0.0
101318
101318
11.25
11.24
0.00
0.00
0.00
0.0
0.00
0.00
0.00
89811.5
11506.8
396
0.0
101319
11.24
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
89693.1
11625.4
400
0.0
101319
11.23
0.00
0.00
0.0
0.00
0.00
0.00
89574.6
11744.0
404
0.0
101319
11.23
0.00
0.00
0.0
0.00
0.00
0.00
89456.1
11862.7
408
0.0
101319
11.22
0.00
0.00
0.0
0.00
0.00
0.00
89337.6
11981.3
0.00
0.00
0.00
89219.1
12099.9
G:U08S12013X13031-Wilmington National GuarMCalcM13031 Infiltration Routing 25y24hr

9/26/2,014 Wilmington National Guard 13031
MLV Stormwater Infiltration Basin Routing
50-year 24hr Storm
No Infiltration
WATERSHED DATA
BEFORE DEVELOPMENT
WATERSHED AREA
1.57 ACRES
RUNOFF CIDER 'C'
0.15 11
TIME OF CONCENTR
10.00 MIN
INTENSITY (50 YR)
7.85 IN/HR
Qa = 1.85 CFS
Qa = PRE -DEVELOPED PEAK DISCHARGE
COMPUTE DEPTH OF RUNOFF
P = 9 INCHES 50yr, 24hr PRECIPITATION
CN= 76
S = (1000/CN)-10
S = 3.16
Depth (D) = (P-0.2S)42/(P+0.8S)
D = 6.08 IN - 50yr, 24hr RUNOFF DEPTH
SET VOLUME AND COMPUTE TIME TO PEAK
Tp = [(43.5)(D)(Area)] / Qp
Tp = 45.15 MINUTES
Storage Volume Req'd = (Qp-Qa)'Tp'1.39'60
111,405 cu. ft.
CALCULATE Ks AND b
BOTTOM INFILTRATION ELEVATION Al 7.50 feet
AFTER DEVELOPMENT
WATERSHED AREA
5.37 ACRES
R.UNOFFCOEF.'C'
0.66
TIME OF CONCENTR
5.00 MIN
INTENSITY 50 YR
8.87 IN/HR
Qp = 31.44 CFS
Qp = POST -DEVELOPED PEAK DISCHARGE
S
Z
CONTOUR
]NCR
ACCUM
CONTOUR
AREA
VOL
VOL
STAGE
In S
In Z
Z est
(sq ft)
(cu ft)
(cu ft)
(ft)
(ft)
7.50
17794
0
0
0
0
0
0
8.00
18670
18,232
18,232
0.5
9.8109-0.69314718
0.55
9.00
20482
19,576
37.808
1.5
10.5403
0.4055
1.33
10.00
22374
21,42E
59,236
2.5
10.9893
0.9163
2.27
11.00
24347
23,361
82.597
3.5
11.3217
1.2528
3.39
12.00
28400
25,374
107.970
4.5
11.5896
1.5041
4.68
13.00
28534
27,467
135,437
5.5
11.8163
1.7047
6.14
Regression Output
Ks = 29874
b = 0.83
X Coefficient 10.30
G:U0BSW13113031-Wilmington National GuarcRC8IC5113031 Infiltration Routing 50y24hr no infil

9/26/2914 Wilmington National Guard 13031
MLV Stormwater Infiltration Basin Routing
50-year 24hr Storm
No Infiltration
CHAINSAW METHOD FOR
RISER BARREL ROUTING
STORM DATA
Qa =
1.85 cis
Qp =
31.44 cfs
• Infiltration rate In/hr
Tp =
45.1 min
(Per Soils Report)
dT =
4 min
BASIN DATA
Ks =
29874
b =
0.83
Zo =
7.50 ft
Normal water elev =
7.50 ft
Peak Outflow =
8.24 cfs
Weir Length =
It
Peak Stage =
11.72 It
Cw =
3.0
Maximum Storage =
99,093 cu ft
Zcr =
it
Control Holes:
State Orifice: Dia =
0.00 in
Dd =
in
Inv =
0.00 it
Cd =
0.6
Weir: L =
120 in
Zi =
It
Inv =
11.5 ft
Emergency Spillway L =
120 in
Inv =
12.00 It
Emergency
Time
Inflow
Storage
Stage
Outflow
W Riser
Barrel
Spillway
Orifice
Weir
IFStore
Infiltrate
(min)
(cfs)
(cu ft)
(ft)
(cfs)
(cfs)
(cfs
(cfs)
(cfs)
(cfs)
(cu ft)
(CO
0
0.0
0
7.50
0
0
0
0.00
0
0.00
0.0
0.0
4
0.6
0
7.50
0
0.00
0
0.00
0
0.00
0.0
0.0
8
2A
145
7.50
D.00
0.00
0.0
0.00
0.00
0.00
145.2
0.0
12
5.2
715
7.51
0.00
0.00
0.0
0.00
0.00
0.00
714.8
0.0
16
8.8
1955
7.54
0.00
0.00
0.0
0.00
0.00
0.00
1955.4
0.0
20
12.9
4062
7.59
0.00
0.00
0.0
0.00
0.00
0.00
4061.9
0.0
24
17.3
7163
7.68
0.00
0.00
0.0
0.00
0.00
0.00
7162.5
0.0
28
21.5
11309
7.81
0.00
0.00
0.0
0.00
0.00
0.00
11309.0
0.0
32
26.3
16472
7.99
0.00
0.00
0.0
0.00
0.00
0.00
16472.5
0.0
36
28.4
22546
8.21
0.00
0.00
0.0
0.00
0.00
0.00
22546.0
0.0
40
30.4
29352
8.48
0.00
0.00
0.0
0.00
0.00
0.00
29352.3
0.0
44
31.4
36B58
8.78
0.00
0.00
0.0
0.00
0.00
0.00
36657.9
0.0
48
31.1
44191
9.10
0.00
0.00
0.0
0.00
0.00
0.00
44190.8
0.0
52
29.7
51662
9.43
0.00
0.00
0.0
0.00
0.00
0.00
51661.5
0.0
56
27.2
58785
9.75
0.00
0.00
0.0
0.00
0.00
0.00
58785.4
0.0
60
24.2
65304
10.06
0.00
0.00
0.0
0.00
0.00
0.00
65304.4
0.0
64
21.6
71123
10.33
0.00
0.00
0.0
0.00
n n0
0.00
71122.7
0.0
68
19.3
76308
10.58
0.00
0.00
0.0
0.00
0.00
0.00
76308.0
0.0
72
17.2
80929
10.81
0.00
0.00
0.0
0.00
0.00
0.00
80929.2
0.0
76
15.3
85048
11.01
0.00
0.00
0.0
0.00
0.00
0.00
85047.6
0.0
80
13.6
88718
11.19
0.00
0.00
0.0
0.00
0.00
0.00
88718.0
0.0
84
12.1
91989
11.36
0.00
0.00
0.0
0.00
0.00
0.00
91989.0
0.0
88
10.8
94904
11.51
0.04
0.00
0.0
0.00
0.00
0.04
94904.1
0.0
92
9.6
97493
11.6,!
4.10
0.00
0.0
0.00
0.00
4.10
97493.3
0.0
96
8.6
98826
11.71
7.48
0.00
0.0
0.00
0.00
7.48
98825.5
0.0
100
7.7
99093
11.72
8.24
0.00
0.0
0.00
0.00
8.24
99092.9
0.0
104
6.8
98954
11.71
7.84
0.00
0.0
0.00
0.00
7.84
98953.7
0.0
108
6.1
98710
11.70
7.16
0.00
D.0
0.00
0.00
7.16
98710.0
0.0
112
5.4
98451
11.69
6.46
0.00
0.0
0.00
0.00
6.46
98451.4
0.0
116
4.8
98202
11.67
5.81
0.00
0.0
0.00
0.00
5.81
98201.6
0.0
120
4.3
97967
11.66
5.22
0.00
0.0
0.00
0.00
5.22
97966.7
0.0
124
3.8
97748
11.65
4.69
0.00
0.0
0.00
0.00
4.59
97747.5
0.0
128
3.4
97544
11.64
4.21
0.00
0.0
0.00
0.00
4.21
97543.5
0.0
132
3.0
97354
11.63
3.78
0.00
0.0
0.00
D.00
3.78
97353.9
0.0
136
2.7
97178
11.62
3.40
0.00
0.0
0.00
0.00
3.40
97177.7
0.0
140
2.4
97014
11.61
3.06
0.00
0.0
0.00
0.00
3.06
97014.0
0.0
144
2.2
96862
11.61
2.75
0.00
0.0
0.00
0.00
2.75
96861.9
0.0
148
1.9
96721
11.60
2.47
0.00
0.0
0.00
0.00
2.47
96720.6
0.0
152
1.7
96589
11.59
2.22
0.00
0.0
0.00
0.00
2.22
96589.2
0.0
156
1.5
96467
11.59
2.00
0.00
0.0
0.00
0.00
2.00
96467.1
0.0
160
1.4
96354
11.58
1.80
0.00
0.0
0.00
0.00
1.80
96353.7
0.0
164
1.2
96248
11.57
1.62
0.00
0.0
0.00
0.00
1.62
96248.2
0.0
168
1.1
96150
11.57
1.46
0.00
0.0
0.00
0.00
1.46
96160.2
0.0
172
1.0
96059
11.56
1.32
0.00
0.0
0.00
0.00
1.32
96059.0
0.0
176
0.9
95974
11.56
1.19
0.00
0.0
0.00
0.00
1.19
95974.3
0.0
180
0.8
95895
11.56
1.07
0.00
0.0
0.00
0.00
1.07
95895.5
0.0
184 0.7 95822 11.55 0.97 0.00
G:U0BS12013113031-Wi1mington National GuardlCalcs113031 Infiltration Routing 50y24hr no infil
0.0
0.00
0.00
0.97
95822.2
0.0

912612.014
Wilmington National Guard
MLV
Stormwater Infiltration Basin Routing
13031
50-year 24hr
Storm
No Infiltration
192
0.5
95691
11.55
0.79
0.00
0.0
0.00
0.00
0.79
95690.5
0.0
196
0.5
95631
11.54
0.71
0.00
0.0
0.00
0.00
0.71
95631.5
0.0
200
0.4
95577
11.54
0.64
0.00
0.0
0.00
0.00
0.64
95576.6
0.0
204
0.4
95525
11.54
0.58
0.00
0.0
0.00
0.00
0.58
95525.4
0.0
208
0.3
95478
11.54
0.63
0.00
0.0
0.00
0.00
0.53
95477.8
0.0
212
0.3
95434
11.53
0.48
0.00
0.0
0.00
0.00
0.48
95433.5
0.0
216
0.3
95392
11.53
0.43
0.00
0.0
0.00
0.00
0.43
95392.3
0.0
220
0.2
95354
11.53
0.39
0.00
0.0
0.00
0.00
0.39
95353.8
0.0
224
0.2
95318
11.53
0.35
0.00
0.0
0.00
0.00
0.35
95318.0
0.0
228
0.2
95285
11.53
0.32
0.00
0.0
0.00
0.00
0.32
95284.7
0.0
232
0.2
95254
11.52
0.29
0.00
0.0
0.00
0.00
0.29
95253.6
0.0
236
0.2
95225
11.52
0.27
0.00
0.0
0.00
0.00
0.27
95224.6
0.0
24D
0.1
95198
11.52
0.24
0.00
0.0
0.00
0.00
0.24
95197.6
0.0
244
0.1
95172
11.52
0.22
0.00
O.D
0.00
0.00
0.22
95172.4
0.0
248
0.1
95149
11.52
0.20
0.00
0.0
0.00
0.00
0.20
95148.9
0.0
252
0.1
95127
11.52
0.18
0.00
0.0
0.00
0.00
0.18
95127.0
0.0
256
0.1
95107
11.52
0.17
0.00
0.0
0.00
0.00
0.17
95106.5
0.0
260
0.1
95087
11.52
0.15
0.00
0.0
0.00
0.00
0.15
95087.4
0.0
264
0.1
95070
11.51
0.14
0.00
0.0
0.00
0.00
0.14
95069.6
0.0
268
0.1
95053
11.51
0.13
0.00
0.0
0.00
0.00
0.13
95052.9
0.0
272
0.1
95037
11.51
0.11
0.00
0.0
0.00
0.00
0.11
95037.4
0.0
276
0.0
95023
11.51
0.10
0.00
0.0
0.00
0.00
0.10
95022.9
0.0
280
0.0
95009
11.51
0.10
0.00
0.0
0.00
0.00
0.10
95009.3
0.0
284
0.0
94997
11.51
0.09
0.00
0.0
0.00
0.00
0.09
94996.6
0.0
288
0.0
94985
11.51
0.08
0.00
0.0
0.00
0.00
0.08
94984.7
0.0
292
0.0
94974
11.51
0.07
0.00
0.0
0.00
0.00
0.07
94973.6
0.0
296
0.0
94963
11.51
0.07
0.00
0.0
0.00
0.00
0.07
94963.2
0.0
300
0.0
94954
11.51
0.06
0.00
0.0
0.00
0.00
0.06
94953.5
0.0
304
0.0
94944
11.51
0.06
0.00
0.0
0.00
0.00
0.06
94944.4
0.0
308
0.0
94936
11.51
0.05
0.00
0.0
0.00
0.00
0.05
94935.9
0.0
312
0.0
94928
11.51
0.05
0.00
0.0
0.00
0.00
0.05
94927.9
0.0
316
0.0
94920
11.51
0.04
0.00
0.0
0.00
0.00
0.04
94920.4
0.0
320
0.0
94913
11.51
0.04
0.00
0.0
0.00
0.00
0.04
94913.4
0.0
324
0.0
94907
11.51
0.04
0.00
0.0
0.00
0.00
0.04
94906.8
0.0
328
0.0
94901
11.51
0.03
0.00
0.0
0.00
0.00
0.03
94900.6
0.0
332
0.0
94895
11.51
0.03
0.00
0.0
0.00
0.00
0.03
94894.8
0.0
336
0.0
94889
11.51
0.03
0.00
0.0
0.00
0.00
0.03
94889.4
0.0
340
0.0
94884
11.50
0.03
0.00
0.0
0.00
D.00
0.03
94884.2
0.0
344
0.0
94879
11.50
0.03
0.00
0.0
0.00
0.00
0.03
94879.4
0.0
348
0.0
94875
11.50
0.02
0.00
0.0
0.00
0.00
0.02
94874.9
0.0
352
0.0
94871
11.50
0.02
0.00
0.0
0.00
0.00
0.02
94870.7
0.0
356
0.0
94867
11.50
0.02
0.00
0.0
0.00
0.00
0.02
94866.7
0.0
360
0.0
94883
11.50
0.02
0.00
0.0
0.00
0.00
0.02
94862.9
0.0
364
0.0
94859
11.50
0.02
0.00
0.0
0.00
DAO
0.02
94859.4
0.0
368
0.0
94B56
11.50
0.02
0.00
0.0
0.00
0.00
0.02
94856.0
0.0
372
0.0
94853
11.50
0.02
0.00
0.0
0.00
0.00
0.02
94852.9
0.0
376
0.0
94850
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94849.9
0.0
380
0.0
94847
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94847.1
0.0
384
0.0
94844
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94844.5
0.0
388
0.0
94842
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94B42.0
0.0
392
0.0
94840
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94839.6
0.0
396
0.0
94837
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94837.4
0.0
400
0.0
94835
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94835.3
0.0
404
0.0
94833
11.50
0.01
0.00
0.0
0.00
0.00
0.01
94833.3
0.0
408
0.0
94831
11.50
0.01
0.00
0.0
O.on
0.00
0.01
94831.4
0.0
G:1JOEISVO13113031-Wilmington National GuardtC21CSt13031 Infiltration Routing 50yf14hr no infil

9/26/2p14 Wilmington National Guard 13031
MLV Stormwater Infiltration Basin Routing
100-year 24hr Storm
WATERSHED DATA
BEFORE DEVELOPMENT
(WATERSHED AREA
1.57 ACRES
RUNOFF CIDER 'C'
0.15
TIME OF CONCENTR
10.00 MIN
INTENSITY (100 YR)
8AB IN/HR
Qa = 2.00 CFS
Qa = PRE -DEVELOPED PEAK DISCHARGE
COMPUTE DEPTH OF RUNOFF
P = 10 INCHES 100yr, 24hr PRECIPITATION
CN = 76
S = (1000/CN)-10
S = 3.16
Depth (D) _ (P-0.2S)A2/(P+0.8S)
D = 7.01 IN-100yr, 24hr RUNOFF DEPTH
SET VOLUME AND COMPUTE TIME TO PEAK
Tp = [(43.5)(D)(Area)] / Qp
Tp = 48.10 MINUTES
Storage Volume RegA = (Qp-Qa)"Tp'1.39'60
128,490 cu. ft.
CALCULATE Ks AND b
BOTTOM INFILTRATION ELEVATION Al 7.50 feet
AFTER DEVELOPMENT
WATERSHED AREA
�5.37S
RUNOFF COEF.'C'
0.66
TIME OF CONCENTR
5.00 MIN
INTENSITY 100 YR
9.60 IN/HR
Qp = 34.02 CFS
Qp = POST -DEVELOPED PEAK DISCHARGE
S
Z
CONTOUR
(NCR
ACCUM
CONTOUR
AREA
VOL
VOL
STAGE
In S
In Z
Z est
(sq ft)
(cu ft)
(cu ft)
(ft)
(ft)
7.50
17794
0
0
0
0
0
0
8.00
18670
18,232
18,232
0.5
9.6109-0.69314718
0.55
9.00
20482
19,576
37,808
1.5
10.5403
0.4055
1.33
10.00
22374
21,428
59,236
2.5
10.9693
0.9163
2.27
11.00
24347
23,361 '
82,597
3.5
11.3217
1.2528
3.39
12.00
26400
25,374
107,970
4.5
11.5896
1.5041
4.68
13.00
28534
27,467
135,437
5.5
11.8163
1.7047
6.14
Regression Output:
Ks = 29874
b = 0.83
X Coefficient 10.30
G:VOBSU013113031-Wilmington National GuardlCalcs113031 Infiltration Routing 100y24hr

9/20/2614 Wilmington National Guard
MLV Stormwater Infiltration Basin Routing 13031
100-year 24hr Storm
CHAINSAW METHOD FOR
RISER BARREL ROUTING
STORM DATA
Qa =
2.00 Cfs
Qp =
34.02 cfs
' infiitration rate 1.2 1n/hr
Tp =
48.1 min
(Per Soils Report)
dT =
4 min
BASIN DATA
Ks =
29874
b =
0.83
Zo =
7.50 It
Normal water elev =
7.50 It
Peak Outflow= 13.12 cfs
Weir Length =
It
Peak Stage =
11.80 it
Cw =
3.0
Maximum Storage =
100,647 cu It
Zcr=
It
Control Holes:
State Orifice: Dia =
0.00 in
Dd =
in
Inv =
0.00 It
Cd =
0.6
Weir: L =
120 in
ZI
it
Inv =
11.5 it
Emergency
Spillway L =
120 in
Inv =
12.00 It
Time
Inflow
Storage
Stage
Outflow
W Riser
Emergency
Barrel Spillway
Orifice
Weir
IFStore
(min)
(ems)
(cu ft)
(ft)
(Cfs)(CIS)
(s)
WS)
(Cfs)
(cfs)
Infiltrate
0
0.0
0
7.50
0
0
0
(cu it)
(Cf)
4
0.6
0
7.50
0
0.00
0
0.00
0
0.00
0.0
0.0
8
2.3
139
7.50
0.00
0.00
0.0
0.00
0
0.00
0.0
118.6
12
5.0
683
7.50
0.00
0.00
0.0
0.00
n nn
0.00
0.0
237.3
16
8.5
1B74
7.53
0.00
0.00
0.0
0.00
0.00
0.00
327.3
355.9
20
12.6
3908
7.57
0.00
0.00
0.0
0.00
0.00
0.00
1399.7
474.6
24
17.0
6923
7.65
0.00
0.00
0.0
0.00
0.00
0.00
3314.5
593.1
28
21.3
10992
7.77
0.00
0.00
0.0
0.00
0.00
0.00
6210.8
711.8
32
25.5
16116
7.94
0.00
0.00
0.0
0.00
0.00
0.00
10161.2
830.4
36
29.0
22224
8.16
0.00
0.00
0.0
0.00
0.00
0.00
15166.6
949.0
40
31.7
29179
8.42
0.00
0.00
0.0
0.00
0.00
0.00
21156.3
1067.6
44
33.4
36786
8.73
0.00
0.00
0.0
0.00
0.00
0.00
27992.8
1186.3
48
34.0
44806
9.07
0.00
0.00
0.0
0.00
0.00
0.00
35481 A
1304.9
52
33.5
52972
9.42
0.00
0.00
0.0
0.00
0.00
0.00
43382.8
1423.5
56
31.8
61006
9.78
0.00
0.00
0.0
0.00
0.00
0.00
51429.9
1542.1
60
29.1
68641
10.13
0.00
0.00
0.0
0.00
0.00
0.00
59345.7
1650.8
64
26.2
75636
10.46
0.00
0.00
0.0
0.00
0.00
0.00
66862.0
1779.4
68
23.5
81921
10.76
0.00
0.00
0.0
0.00
0.00
0.00
73737.8
1898.0
72
21.1
87563
11.03
0.00
0.00
0.0
0.00
0.00
0.00
79904.8
2016.7
76
18.9
92626
11.28
0.00
0.00
0.0
0.00
0.00
0.00
85427.7
2135.3
80
17.0
97171
11.50
0.00
0.00
0.0
0.00
0.00
0.00
90372.6
2253.9
84
15.3
101250
11.70
7.30
0.00
0.0
0.00
0.00
0.00
94798.7
2372.5
88
13.7
103160
11.79
12.79
0.00
0.0
0.00
0.00
7.30
98758.8
2491.2
92
12.3
103376
11.80
13.12
0.00
0.0
0.00
0.00
12.79
100549.8
2609.8
96
11.0
103177
11.78
12.06
0.00
0.0
0.00
0.00
13.12
100647.5
2728.4
100
9.9
102929
11.76
10.88
0.00
0.0
0.00
0.00
12.06
100329.6
2847.0
104
8.9
102694
11.75
9.78
0.00
0.0
0.00
0.00
10.88
99963.6
2965.7
108
8.0
102480
11.73
8.78
0.00
0.0
0.00
0.00
9.78
99609.8
3084.3
112
7.2
102287
11.71
7.88
0.0111
0.0
0.00
0.00
8.78
99276.9
3202.9
116
6.4
102114
11.70
7.06
0.00
0.0
0.00
0.00
7.88
98965.3
3321.5
120
5.8
101961
11.68
6.33
0.00
0.0
0.00
0.00
7.06
98674.1
3440.2
124
5.2
101825
11.67
5.67
0.00
0.0
0.00
0.00
6.33
98401
3677.4
128
4.6
101705
11.66
5.08
0.00
0.0
0.00
0.00
5.08
97909.0
3796.1
132
4.2
101601
11.65
4.54
0.00
0.0
0.00
0.00
97686.2
3796.1
136
3.7
101511
11.64
4.06
0.00
0.0
0.00
0.00
4.54
4.06
97477.7
140
3.4
101434
11.63
3.63
O.DO
0.0
0.00
0.00
4.0E
97282.5
4033.3
4151.9
144
3.0
101370
11.62
3.23
0.00
0.0
0.00
0.00
3.23
97099.7
4151.6
148
2.7
101318
11.61
2.88
0.00
0.0
0.00
0.00
3.88
96928.3
4270.E
152
2.4
101276
11.60
2.56
0.00
0.0
0.00
0.00
2.56
96767.7
4507.2
156
2.2
101243
11.59
2.27
0.00
0.0
0.00
0.00
2.5E
96767.7
4507.8
160
2.0
101221
11.59
2.02
0.00
0.0
0.00
0.00
2.27
96617.0
4626.4
164
1.8
101206
11.58
1.78
0.00
0.0
0.00
0.00
2.02
96475.6
4745.1
168
1.6
101200
11.57
1.57
0.00
0.0
0.00
0.00
1.78
96342.7
4863.7
172
1.4
101201
11.57
1.38
0.00
0.0
0.00
0.00
1.57
96217.8
4982.3
176
1.3
101209
11.56
1.21
0.00
0.0
0.00
0.00
1.3E
96100.3
5100.9
180
1.1
101223
11.56
1.06
0.00
0.0
0.00
0.00
1.21
95989.5
5219.6
184
1.0
101243
11.55
0.92
0.00
0.0
0.00
0.00
1.06
95885.1
5338.2
G:UOBS12013113031-Wilmington National GuardlCalcs113031 Infiltration
Routing
100y24hr
0.00
0.00
0.92
95786.5
5456.8

9/�6/2014
Wilmington National Guard
MLV
Stormwater Infiltration Basin Routing
13031
100-year 24hr Storm
192
196
0.8
0.7
101299
11.54
0.68
0.00
0.0
0.00
0.00
0.68
95605.1
5694.1
200
0.7
101334
101373
11.54
11.53
0.58
0.00
0.0
0.00
0.00
0.58
95521.3
5812.7
204
0.6
101416
11.53
0.49
0.40
0.00
0.00
0.0
0.0
0.00
0.00
0.49
95441.7
5931.3
208
0.5
101462
11.53
0.33
0.00
0.0
0.00
0.00
0.40
95365.8
6050.0
212
0.5
101511
11.52
0-26
0.00
0.0
0.00
0.00
0.00
0.00
0.33
95293.3
616B.6
216
0.4
101563
11.52
0.21
0.00
0.0
0.00
0.00
0,26
0.21
95223.7
95156.8
6287.2
220
224
0.4
101617
11.52
0,15
0.00
0.0
0.00
0.00
0.15
96092.1
6405.8
6524.5
228
0.3
0.3
101672
11.51
0.11
0.00
0.0
0.00
0.00
0.11
95029.2
6643.1
232
0.3
101729
101787
11.51
11.51
0.07
0.04
0.00
0.0
0.00
0.00
0.07
94967.7
6761.7
236
0.3
101845
11.50
0.01
0.00
0.00
0.0
0.0
0.00
0.00
0.04
94907.0
6880.3
240
0.2
101902
11.50
0.00
0.00
0.0
0.00
0.00
0.01
94846.3
6999.0
244
0.2
101956
11.50
0.00
0.00
0.0
0.00
0.00
0.00
94784.7
7117.6
248
0.2
102005
11.49
0.00
0.00
0.0
0-00
O.00
0.00
0.00
0.00
94720.1
7236.2
252
0.2
102048
11.49
0.00
0.00
0.0
0.00
0.00
0.00
0.00
94850.0
94574.9
7354.9
7473-5
256
260
0.1
0.1
102087
11.49
0.00
0.00
0.0
0.00
0.00
0.00
94495.4
7592.1
264
0.1
102123
102154
11.48
11.48
0.00
0.00
0.00
0.0
0.00
0.00
0.00
94411.8
7710.7
268
0.1
102182
11.47
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
94324.7
7829.4
272
0.1
102208
11.47
0.00
0.00
0.0
0.00
0.00
0.00
94234.3
7948.0
276
0.1
102230
11.46
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
94141.0
8066.6
280
0.1
102251
11.46
0.00
0.00
0.0
0.00
0.00
0.00
0.00
94045.1
93946.9
8185.2
8303.9
284
288
0.1
0.1
102269
11.45
0.00
0.00
0.0
0.00
0.00
0.00
93846.6
8422.5
292
0.1
102286
102300
11.45
11.44
0.00
0.00
0.00
0.0
0.00
0.00
0.00
93744.5
8641.1
296
0.0
102314
11.44
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
93640.6
8659.7
300
0.0
102326
11.43
0.00
0.00
0.0
0.00
0.00
0.00
0.00
93535.2
8778.4
304
0.0
102336
11.43
0.00
0.00
0.0
0.00
0.00
0.00
0.00
93428.5
8897.0
308
0.0
102346
11.42
0.00
0.00
0.0
0.00
0.00
0.00
0.00
93320.6
93211.5
9015.6
9134.3
312
316
0.0
0.0
102354
11.41
0.00
0.00
0.0
0.00
0.00
0.00
93101.5
9252.9
320
0.0
102362
11.41
0.00
0.00
0.0
0.00
0.00
0.00
92990.6
9371.5
324
0.0
102369
102375
11.40
11.40
0.00
0.00
0.0
0.00
0.00
0.00
92878.9
9490.1
328
0.0
102381
11.39
0.00
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
92766.5
9608.8
332
0.0
102386
11.39
0.00
0.00
0.0
0.00
0.00
0.00
0.00
92653.4
9727.4
336
0.0
102390
11.3a
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
92539.8
9846.0
340
0.0
102394
11.37
0.00
0.00
0.0
0.00
0.00
0.00
92425.7
92311.1
9964.6
10083.3
344
348
0.0
0.0
102398
11.37
0.00
0.00
0.0
0.00
0.00
0.00
92196.1
10201.9
352
0.0
102401
102404
11.36
11.36
0.00
0.00
0.00
0.0
0.00
0.00
0.00
92080.7
10320.5
356
0.0
102407
11.35
0.00
0.00
0.00
0.0
O.0
0.00
0.00
0.00
91965.0
10439.1
360
0.0
102409
11.35
0.00
0.00
0.0
0.00
0.00
0.00
91849.0
10557.8
364
0.0
102411
11.34
0.00
0.00
0.0
0.00
0.00
0.00
91732.7
10676.4
36B
0.0
102413
11.33
0.00
0.00
0.0
0.00
0.00
0.00
0.00
0.00
91616.2
10795.0
372
0.0
102415
11.33
0.00
0.00
0.0
0.00
0.00
0.00
0.00
91499.5
91382.6
10913.7
11032.3
376
380
0.0
0.0
102416
102418
11.32
11.32
0.00
0.00
0.0
0.00
0.00
0.00
91265.5
11150.9
384
0.0
102419
11.31
0.00
0.00
0.00
0.00
0.0
0.0
0.00
0.00
0.00
91148.2
11269.5
388
0.0
102420
11.30
0.00
.0.00
0.0
0.00
0.00
0.00
0.00
0.00
91030.8
11388.2
392
0.0
102421
11.30
0.00
0.00
0.0
0.00
0-00
0.00
0.00
90913.3
90795.6
11506.6
396
400
0.0
102422
11.29
0.00
0.00
0.0
0.00
0.00
0.00
90677.9
11625.4
11744.0
404
0.0
0.0
102423
102423
11.29
11.28
0.00
0.00
0.00
0.0
0.00
0.00
0.00
90560.1
11862.7
408
0.0
102424
11.27
0.00
0.00
0.00
0.0
0.00
0.00
0.00
90442.2
11981.3
0.0
0.00
0.00
0.00
90324.2
12099.9
G:UOBS12013113031-Wilmington National Gu2rd%Ca1cs113031 Infiltration Routing 100yr24hr

PFDS: Contiguous US Page 1 of 2
www.nws.noaa.gov
NOAA's National Weather Service
HydrometeorologicalDesign Studies C{
Precipitation
Home Site Map News Organization Search !F'^ NWS i All NOAA Go
General Info NOAA ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES: NC
Homepage
Current Projects DATA DESCRIPTION
FAQ
Glossary Data type: {`precipitation depth UnOs: ' english Time series type: j partial duration
Precipitation Frequency
y (PF) SELECT LOCATION
PF Data Server 1. Manually:
• PF in GIS Format 0 .---
submit
a) Enter location (decimal degrees, use'-" fors and W): latitude: longitude:' --
on Rude:
• PF Maps ------------ --------- -----.. __ ......_
• Temporal Dieu. b) Select station (click here for a list of stations used in frequency analysis for No): VALMINGTON 7 N (31-9467)
• Time Series Data 2. Use reap:
• PFDS Perform.
PF Documents Sanl id S^+lh!`eid
Probable Maximum - • Goldsboro
Precipitation PMP '� a) Select location
P ( 1 D ;�" (move erosshair or double elide)
aifn.2T) Forest i(:R51cn
PMP Documents Pinehersl b) Click on station icon
Miscellaneous SwDrem?mFayette�rJie
Pines New ,OEM (L-ishow stations on map)
Publications Raeford o ciratan
AEP storm Analysis Rackrrgham II.utb V ew
Record 4ays!ock
Precipitation ----. Leurionburg Jacksonville .�JF
Morehead City
Sarmettsv8l�e� Lumbrtan - -
, Ca^ p Leieune
Inquiries Dioon"-
Ile \ 17han'.sk Es -
pale -List -server 7arlington
Florence Marion
/LtRrtimtr�(C;a
� j��
*Y�:.aSaiG:no
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Conwrov eLdN:arvc-
Mu7lOs T',
Georgrc:vr
LOCATION INFORMATION:
Name: Castle Hayne, North Carolina
US•
Station Name: WILMINGTON 7 N
Site to: 31-9467
Latitude: 34.3167•
Longitude:-77.9167-
Elevation: 40 it
20 xm �I' source: Google Maps
POINT PRECIPITATION FREQUENCY (PF) ESTIMATES
WITH 90% CONFIDENCE INTERVALS AND SUPPLEMENTARY INFORMATION
NOAA Atlas 14, Volume 2, Version 3
ffl Print Page
PDS-based precipitation frequency estimates with 90% confidence intervals (in inches)'
Duration Average recurrence interval (years)
1 2 5 10 25 50 100 200 Sao 1000
5-min
O519
0.616
0.721
0.803
0.9D7
0.984
1.07
1.25
1.39
(OA84-0.559)
I (0.574-O.W4)
1 (0.671-0.775)
1 (0.745-0.53)
(O.B37-0.972)
(0.905-1.06)
1 (0.973-1.14)
(1.04-1.23)
(1.12-1.35)
(1.19-1.44)
10-min
0.829
0.985
1.15
1.26
1.45
1.57
1.69
1.81
1.97
2.10
0.773-0.8
0.918-1.06)
1 (1.07-1.24)
(1.19-1.38)
(1.33-1.55)
(1.44-1.68)
(1.55-1.82) 11
(1.5-1.95) 11
(1.77-2.13)
(1.87-2.2
15-min
(0.95 4.12)
(1.169�33)
(1.36-1.57)
(1. 16.75
(1.B9 1�88)
(1. 292.13) 11
(1. ®2.30)
1 (2.08-2.
(2.3582.84
sD-min
(1.33 1.53)
(1.60-1.84
1.93-2.29
.18-52.53
S7 2.91
: 5 321
(2.98�3.52)
(32353.83)
(3. 5-26)
.8 -4.5)
60-min
1.77
(195-1.91)I
2.15
R•00-2.31) J1
2.66
(2.48-286)
3.06
1 (2.84-329)
3.61
1 (3.34-3.87)
405
(3.72-4.35)
4.51
(4.12-4.84)
5.00
(4.54-5.37)
5.67
(5.103.11)
fi.29
(5.55-8.72)
2-hr
2.10
(1.94-229)
2.58
a.36-2.79)
3.28
(3.01-3.55)
9.85
(333-4.19)
4.69
(429-6.11)
5.42
(4.93-5.90)
5.21
5.2-8.78)
7.08
(8.38-7.89)
L37
Q.43-9.11)
9.48
(8.35-10.4)
3-hr
(2: 8-2
(2.5272.99
(9.223.8
.814.54)
(4.89115.eo)
(5.4409.54)
(6.2897.58)
(7: 808.72)
(8.516 0.5)
(9. 5' 12.1)
6-hr
2.78
(2.57-3.05)
3-JO
(3.123.71)
4.39
(3.99-4.74)
5.18
(4.73-5.64)
8.40
(5.83-6.97)
7.49
(0.78-6.1a)
8.72
(7.84-9A8)1
10.1
(8.97-11.0)
12.2
(10.7-13.
14.1
(12.2-15.3)
12-hr
3.25
(2.98-3.59)
3.96
(3.62-4.36)
5.11
(4.67-5.63)
6.12
(5.56-6.72)
7.65
(6.89-8.38)
9.01
(8.07-9.85)
10.5
(9.38-11.5
12.3
00.8-13.4)
15.0
(13.0-18.4)
17.4
(14.9-19.0)
24 hr
A494.28
5.1895.21
.40-6
AB'8.05
: 3010.1
(9A1- 1.9)1
(10.9-14.0)
1 (12.6 6.4)
151720.2)
(173023.8)
24ay
4S0
SA4
8.97
8.31
10.9
12.1
14.2
16.5
19.9
29.0
http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=nc 10/6/2014

09/26/14
Stormwater & Erosion Control Narrative
Wilmington Readiness Center Renovation
North Carolina National Guard
New Hanover County, NC
TE 13031
The Wilmington Readiness Center Renovation North Carolina National Guard is an airport
industrial site in New Hanover County, Parcel ID# R04200-001-03 1 -000, owned by USA, and
contains approximately 41.29 acres. The project is new development and is located on Infantry
Road. Wetlands exist on the site.
The Wilmington Readiness Center Renovation North Carolina National Guard is proposing to
construct one (1) asphalt parking area; relocation of a sanitary sewer main and an infiltration
basin for storm water management for the square footage of the new (proposed) asphalt parking
area and future development in addition to some existing impervious area that is within the
drainage area. There is one (1) Alternate proposed with this plan. Alternate # 1 is chain link
fencing and gates within the proposed MOV parking area. Existing buildings, roads, asphalt
parking and access areas, tennis court, memorial monument, utilities and storm drain systems are
located on the property, most of which will remain with the exception of minor storm drain and
utilities. New impervious area for this project is 48,210 sf with 59,950 sf for future
development. The existing impervious area for this project is 215,245 sf. After project
completion, the total amount of impervious area for the site will be 323,405 sf or 7.42 acres,
which is 17.98% impervious coverage over the project site. The estimated amount of disturbed
area is 5 acres.
The drainage area for the new (proposed) impervious area and future development in addition to
some existing impervious area is 5.37 acres and provides sufficient storm water management,
with an infiltration basin, to meet the State's 1.5" requirement and alternately sized for the 25-yr
and analyzed for the 100-yr storm event. An emergency spillway has been designed such that in
the
RECf mA/E
OCT 0 3 2014
BP

09/26/14 TE 13031
event of a system failure (assuming no infiltration) during the 50-year storm event, storm water
will be conveyed to an existing drainage way. Calculations have also been provided to
demonstrate that the 10-yr 24-hour ;tu rl—fi event can be inf itrated without discharging the system
�gn
using an infiltration rate of one-half of the infiltration rate reported in the soils report, therefor a(
waiving the State required off-line bypass and vegetated filter strip. Per the attached soils report, #�
the SHWT occurs at 102 inches (8.5 feet) below existing grade. The elevation of the ground
surface at the bore location is approximately elevation 14. The bottom of the infiltration basin
has been set at elevation 7.5.
Prior to beginning the redevelopment of the site, two (2) gravel construction entrances, inlet
protection around existing inlets and temporary silt fence will be installed. Then the site will be
cleared to the limits shown. After these measures occur, the infiltration basin will be constructed
followed by the installation of the storm drain collection system with inlet protection around the
drop inlets. The proposed asphalt area will be graded and poured. Final site grading and
stabilization of the site will then occur. Temporary erosion control measures will remain in place
until such time as when areas are stabilized. Permanent measures include permanent stands of
grass. Specific measures and directions to the contractor are noted on the plans.

Job No. 13031
To:
Attention
Date: 10/03/14
TRIPP ENGINEERING, P.C.
419 Chestnut Street, Wilmington, NC 28401
Phone: [phone] • FAX: [phone]
Email: [e-mail]
NCDENR
Kelly Johnson
LETTER OF TRANSMITTAL
Subject: Wilmington Readiness Center Renovation North Carolina National Guard
FAX TRANSMITTAL: NUMBER OF PAGES INCLUDES COVER
I am sending you: ( X ) ATTACHED ( ) UNDER SEPARATE COVER
( X ) Prints ( ) Tracings ( ) Copy of letter ( ) Specifications ( X ) Other
Copies Item No. Description
2 C21 C3, DD1, DD2 Site Plan. Details and Drainage Area maps
1 Page 3 of the Application
1 Narrative
1 Infiltration Basin Sul2plement
1 Calculations
These are transmitted as checked below:
( X ) For Approval ( ) For Your Use ( ) Sign & Return ( X) Review
Remarks: As per our telephone conversation, please swap the enclosed olans and documents
for the ones previously submitted for review on September 4, 2014. Thank you.
81
�J
U'L; I U 3 Z014
Signed: Monica Valsi

Johnson, Kelly
From: Johnson, Kelly
Sent: Wednesday, October 01, 2014 1:12 PM
To: 'Monica Valsi'
Subject: RE: Wilmington National Guard
Monica,
Sure. Just mail them in or drop them off. I will put a note with the file that revised plans are coming in.
KJ
From: Monica Valsi [mailto:monica-trippengOec.rr.com]
Sent: Wednesday, October 01, 2014 10:50 AM
To: Johnson, Kelly
Subject: RE: Wilmington National Guard
Kelly,
Thanks so much for sharing the link ... very helpful information. One more question, due to budget restraints the
National Guard had to eliminate most of the improvements to the plan we submitted. Any chance we can substitute the
plans you have in hand with updated plans and still remain "in line"?
From: Johnson, Kelly[mailto:[e-mail]]
Sent: Wednesday, October 1, 201410:22 AM
To: Monica Valsi
Subject: RE: Wilmington National Guard
Importance: Low
Monica,
I was recently assigned to that one. I don't have an estimate on when it will be done, however. It is #14 on my list.
Also, just FYI, there is a website where you can see the status of any permit, http://portal.ncdenr.org/web/deao/permit-
tracker. You can enter the name or number of any permit and see who it is assigned to and the latest dates associated
with it.
KJ

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DUITTE ! 0F..5
t IE Y' ,..'.._
I Ec I !l 2--1 ' .,1� �•�
NORTH CAROLINA LOtt C IJR:'Y
a. -.; mx� r.
NEW HANOVER COUNTY 8mli21 WE 20 r Pv.- To.. It. C.
This deed, made 19 by and
between the COUNTY OF NEW HANOVER. a political subdivision of the State of
North Carolina, whose address is the Courthouse, Wilmington, North Carolina,
grantor, and the UNITED STATES OF AMERICA. grantee;
W ITNESS-ETA:
THAT, WHEREAS the Board of County Commissioners of the County of New
Hanover, State of North Carolina, in a meeting duly assembled, has heretofore
adopted a Resolution authorizing and directing the conveyance without con-
sideration pursuant to North Carolina General Statutes Section 160A-274, as
amended by House Bill 351, ratified 18 March 1977, of a tract of land here-
inafter described and comprising a portion of the New Hanover County Airport;
and
JUL WHEREAS, it has been determined by said Resolution that said tract Of
land is not necessary for the public purposes of Nev Hanover County, and that
It would be in the best interests of the aeonle of New Hanover County to convey
said tract of land upon said terms to the United States of America; and
WHEREAS, the United States of America has agreed that it is in its best
interests to accept said conveyances of land upon said terms;
NOW THEREFORE, in consideration of the premises and other benefits
occurring generally to the County of New Hanover and its people, the County of
New Hanover has given, remised, released, quitclaimed and conveyed, and by
these presents does hereby give, remise, release, quitclaim and convey unto
the United States of America, its successors and assigns all right, title,
Interest or estate of the County of New Hanover in and to the following -
described tract of land constituting a portion of New Hanover County Airport
(the former Bluethenthal Field) said land lying to the southeast of the north -
vest southeast runway (runway 34-16), and which is shown in red on a map attached
hereto and entitled Exhibit "A-1", and which Is more particularly described as
follows
IETURNE?' i • � �
PAGE 1 OF 3

eoorU2.1 wE
All that tract of land situate in New Hanover County, State of
North Carolina, being bound now or formerly on the north, east,.
south, and vest, by land of the New Hanover County Airport, and
being more particularly described as follows:
Beginning at a concrete monument having a coordinate value of
N 189,290.60 feet, E 2,3349409,98 feet, located B 160 40' 30"
w' 268.49 feet f"-" m amil mna cap in the centerline of SCSRt So.
1175; thence, from the point of beginning with the lands of New
Hanover County Airport the following courses and distances:
S 310 11' 33" W 440.70 feet to a concrete monument, S 480 51'
03" E 296.31 feet to a concrete monument S 410 OT' 13" W T30.34
feet to a concrete monument, B 730 01' 04" W 4T6.29 feet to a
concrete monument, N 820 58' 25" W 955.44 feet to a concrete
monument, S 680 3T' 29" W 183.43 feet to a concrete monument,
N 210 38' 08" W 100.01 feet to a concrete monument, S 680 21'
52" W 75.00 feet to a concrete monument, 1 530 38' 51" W 235.83
feet to a concrete monument, 1 680 21' 52" E 2D0.01 feet to a
concrete monument.S 210 38' 08" E 20.06 feet to a concrete monu-
ment, S 790 19, 48" 1 402.24 feet to a concrete monument, N 530
32' W' E 436.04 feat to a concrete monument, N 2TO 36' 35" E
397.64 feet to a concrete monument, N 090 06, 44" W 399.OT feet
to a concrete monument, N 550 26, 18" E 519.62 feet to a concrete
monument, S 820 59' 31" E passing a concrete monument at 676.11
feet in all 695.85 feet to an iron pipe having a coordinate value
of N 189,480.44 feet; E 2,334,232.42 feet located 7 feet southwest
of the centerline of a paved road; thence, leaving the road S 430
05' 06" E crossing the center of another paved road 259.94 feet to
the point of beginning and containing 41.2T acres more or less.
Said tract of land is described with more particularity in that
certain Survey Map drawn by William W. Blanchard, Inc., Surveyors,
of Wallace, North Carolina, dated 22 June 19T6, which map is
attached hereto and incorporated by reference herein as Exhibit "A".
The bearings and coordinates used herein includingthose used in
said map are based on the North Carolina Plane Coordinate System.
TO NAVE AND TO HOLD the aforesaid tract of land and all privileges
thereunto belonging or pertaining, to it, the said grantee, the UNITED STATES
OF AMERICA, and its successors and assigns, free and discharged from all right,
title, claim, estate or interest of any kind of the said grantor, the County
of New Hanover, North Carolina, or anyone claiming by, through or under it.
IN TESTIMONY WHEREOF, the said County of New Hanover has caused this
instrument to be signed in its name by the Chairman of its Board of Commissioners,
and attested thereto by the Clerk of the said Board of Commissioners, and the
.common seal or'New..Hanover County to be hereto affixed, all by order and
authority 'Of a Resolution duly adopted on the � - day of
•19^ �n� a Zeed-r meeting of said New Hanover County Board of Commissioners.
SEAL , COUNTY OF NEV HANOVEH, NORTH CAROLINA
ATTEST: BY
Chairman, Board of County C e®issioners
Clerk, Board of County Commissioners
PAGE 2 OF 3

MORN CAROLINA Boodi2 . PA(i 22
NEW HANOVER COUNTY
The E�:,,dsy of _ T76Ayr�t.Le� . 19 77 . personally appeared
before me_ [lip, .Jr%a Notary Public in
and for the County Of Nev Hanover, State of North Carolina, rl
21 A4k.L-x _ , vho is known to me and who being by me first duly
avorn, deposes and says as follova: Thatshe is personally acquainted with
.•d n►,�.+y N. . who is Chairman of the Hoard of County
Commissioners for the County of New Hanover, State of North Carolina, and that
She the said Qom_ ,K.�.. is Clerk of the Hoard
of County Commissioners for said New Hanover County, North Carolina, and that
jhek//��nows the common meal of said New Hanover County, thatsbe eau 'the said
Uaj,Of O'J/, � Idi. /H _ Chairman of the Board of County
Commissioners of said New Hanover County sign the foregoing instrument, and
thatjhe, the said /i0 d Q, Clerk to the said
Hoard, signed his name thereto in attestation thereof, and affixed the common
seal of said New Hanover County, North Carolina, all by authority duly given
by Resolution adopted by the New Hanover County Board of Commissioners, and
that the foregoing instrument is the act and deed of said Board of Commissioners
of New Hanover County, North Carolina, and is vithin the scope of its powers
as granted by lay.
Witness my hand and notarial seal this the �day
19 i 7
?tT '
tSPAI'._L1' Notary Public
EO' Commission Expires:Oi&L� /y� Y17?
PAGE 3 OF 3

60Ukf12l 4,;
RESOLUTION
WHEREAS, the County of New Hanover has no need in the foreseeable
future for the tract of land hereinafter described; and
WHEREAS, Bald tract of land comprises approximately 41.27 acres of
land of the New Hanover County Airport (formerly Bluethenthal Field), said
land being part of some 80 acres lying southeast of the northwest-soutbeast
runway formerly leased from New Hanover County by the United States Air Force;
and
WHEREAS, the United States Air Fbrce has declared that it no longer
needs said 80 acres of land; and
WHEREAS, the United States of America has expressed a need to retain
the hereinafter -described 41.27 acre tract of land on a permanent basis for
use by the United States Arm. National Guard; and
k
WHEREAS, it is deemed by this Board of Commissioners to be in the best
,. interests of New Hanover County and its people generally to convey said 41.27
acre tract of land to the Federal Government for said purpose; and
WHEREAS, the Board of Commissioners of New Hanover County has been
empowered and authorized by House Bill 351 ratified 18 March 1977 amending
F North Carolina General Statutes Section 16DA-274 to convey said tract of land
without consideration to the United States Government; and
WHEREAS, although said other conveyances bear no relationship to the
instant transaction, or to the consideration or lack of consideration thereof,
several other tracts of land and appurtenant facilities and equipment of
considerable value at said New Hanover County Airport have been or will be
conveyed without consideration by the Federal Government to New Hanover County;
and
WHEREAS, the tract of land which is the subject of this transaction is
more particularly described as follows:
All that tract of land situate in New Hanover County, State of
North Carolina, being bound now or formerly on the north, east,
south, and west, by land of the New Hanover County Airport, and
being more particularly described as follows:
n - PAGE 1 OF 3

Boadi2i. wi 24
Beginning.at a concrete monument having a coordinate value of
N 189,2g0.60 feet, E 2,33h,409.98 feet, located 8 160 40f 30"
W 268.49 feet from a nail and cap in the centerline of JCSR No.
2175, thence; from the point of beginning with the lands of New
Hanover County Airport the following courses and distances:
S 310 11' 33" W 440.70 feet to a concrete monument, S 480 $1'
03" B 296.31 feet to a concrete monument, 8 hlo 07' 13" W 730.34
feet to a concrete monument, 8 730 O1' 04" W 476.29 feet to a
concrete monument, N 820 58' 25" W 955.4h feet to a concrete
monument, S 680 37' 29" W 183.43 feet to a concrete monument,
N 210 38' 08" W 100.01 feet to a concrete monument, S 680 21'
52" W 75.00 feet to a concrete monument, N 530 38' 51" W 235.83
feet to a concrete monument, N 680 214 52" E 200.01 feet to a
concrete monument, S 210 38' 08" E 20.06 feet to a concrete
monument, S T90.1g' 48" N 402.24 feet to a concrete monument,
N 530 32' 40" E 436.04 feet to a concrete monument, N 270 36'
35" E 397.64 feet to a concrete monument, N 090 06' 44" W 399.OT
feet to a concrete monument, N 550 26' 18" E 519.62 feet to a
concrete monument. S 820 59' 31" E passing a concrete monument
at 676.11 feet in all 695.86 feet to an iron pipe having a
coordinate value of N 189,480.44 feet; E 2,334,232.42 feet located
7 feet southwest of the centerline of a paved road; thence, leaving
the road S 430 05' 06" E crossing the center of another paved road
259.94 feet to the point of beginning and containing hl.27 acres
more or less.
Said tract of land is described with more particularity in that
certain Survey Map drawn by William W. Blanchard, Inc., Surveyors,
of Wallace, North Carolina, dated 22 June 1976, which map is
attached hereto and incorporated by reference herein as Exhibit
"All
The bearings and coordinates used herein including those used in
said map are based on the North Carolina Plane Coordinate System.
NOW THEREFORE, BE IT RESOLVER that the Chairman of this Board of
Commissioners cf New Hanover County, North Carolina, be and hereby is authorized
and empowered by said Board of Commissioners to convey the hereinabove-described
tract of land on the above -discussed terms and conditions by Quitclaim Deed to
the United-StAyes of America.
•' :Eft:>' ..
SEAL:
;ATPEST: m
Clerk, Board of County Commissioners
COUNTY OF NEW HANOVER, NORTH CAROLMA
BY 1121,/l, U
Chairman, Board of County Commissioners
PACE 2 OF 3

NORM CAROL? xA BOoI ift FAv 25
NEW HANOVER COUNTY
The �day of 19. 917 personally appeared
before me aslAotary Pnb11c
in and for the �uny f Nev Hanover. State of North Carolina,
71 who is known to me and who being by we
first duly sworn, deposes and says as follows: Thatfhe is personally
acquainted with (It40- esl 0P.J."A0- , who is Chairman of
the Board of County Commissioners for the County of New Hanover, State of
North Carolina, and thatshe the said 11JAa -i
Is Clerk of the Board of County Commissioners for said Nev Hanover County,
North Carol ins, and that--ihe knows the common seal of said New Hanover County;
that.)he saw the said ('&AAd 0-_jLVdL 1y - . Chairman
of the Board of County Commissioners of said Nev Hanover County sign the fore-
going instrument, and thatJhe, the said (�r-" ,0. pla)'f�)
Clerk to the said Board, signed Ur name thereto in attestation thereof, and
affixed the common seal of said Nev Hanover County, North Carolina, all by
authority duly given by the Nev Hanover County Board of Commissioners, and
that the foregoing, instrument is the act and deed of said Board of Commissioners i
of Nev Hanover County, North Carolina, and is within the scope of its powers
as granted by law. ��,,,//�� i
Witness my hand and notarial seal this the d'"'day of � ,
1977.
a' (SEAL)- i - Notary Public
W Cbmmli ion Expires: Ve 4,—
STATE OF NORTH CAROLINA, New Hanover County ,
The Foregoing Cerificaic(s)ol __c3rayS2Lfllst?g._�1L4�drY-
------------------------------------------- (1c) csc -- -- ik - -- —
----------------------------------------------------
Mds---_'_2 ... d`Y of---DCQgmbeT -------- A.D..19_77_.
Drawn BY _CQShDSY- �omnjgBiongrs -------------- BY Lois C. LeRsy, lRegi(suy666ro-f D�eefds
Deputy
PACE 3 OF 3

R F7S
Soils Engineering and .Testing Services
January 14, 2014
VX-qw"�� C �- � '�L Goco.
Tripp Engineering, P.C.
411 Chestnut Street
Wilmington, North Carolina 28401.
Attention: Mr. Phil Tripp, P.E.
Reference: Seasonal High Watertable Estimate
Proposed National Guard Armory Expansion
Infrantry Road
Wilmington, North Carolina
RFTS Job No. 942-14
Dear .Mr. Tripp:
RFTS is. pleased to provide testing services during the design phase of the National Guard Armory
e1-Pansion project located off Infrantry, Road in i, 11mington, North Carolina. Specific site grading plans
had not been provided to us at the time this report was prepared..
DESC'RIPT ON OF ACTIVITIES A11i� Fj-LNDIN ;S
As requested, our staff visited the site on Januar} 8, 2014, to estimate the seasonal high watertable level at
one location in the area proposed for a proposed stormwater pond. The purpose of this testing was to
provide soil parameters for stormwater design.
Seasonal High: Watertable Estimate
A boring was advanced using a rotary drilling rig at 1 location to a depth of approximately 15 feet below
the existing ground surface in the proposed area. The encountered soils were logged and visually
classified by depth and a Munseil Soil Color Chart was used to determine the hue, value, and chroma of
tho visually distinct soil layers. Our soil logs are presented in Table 1.
Soils encountered at this boring location consisted of interbedded relatively clean sands (USCS Soils
Group `SP-SC') in the upper 30 inches below the existing site grade. From approximately .30 to 60 inches
clayey sand (USCS Soil Group `SC') was encountered. Below the depth of 60 inches clean sand (USCS
Soil Group `SP'.) %vere encountered to a depth of 90 inches below the ground surface. From 90 inches to
120 inches sand with clay (USCS Soil Group `SC') uas encountered, and from. 120 inches to the boring
termination depth of 180 inches clean sands (USCS Soil Group `SP') were again encountered.
Comparison of the soils to the Munseli Chart and observations made while on site suggests the presence
of a zone of perched water approximately 102 iirehes below the ground surface indicative of a perched
seasonal high water level during periods of extended or heavy rainfall. No groundwater was encountered
at the boring location through the depth investigated.
RFTS: PLLC Committed to Responsive Service 1305 3A Carolina Beach Ave N � iPhone: 910.470-7450
Carolina Beach, North Carolina 28428 a+wW.rftspllc:con: Email. davidwinstead0charter.net

Tripp Engineering, P.C.
RFTS Job No. 942-14
CLOSURE
January 1.4, 2014
Page Two
This estimate should. be reviewed by appropriate regulatory authorities before finalizing the details of any
civil design. Please find attached our field data and a sketch shoving the approximate test location. If you
have any questions after reviewing this letter, please do not hesitate to contact us at your convenience.
Sincerely,
Z S'
PLLC L. Winstead
Field Operations Manager
DLV'. d1w
Attachments

Table 1
Munsell Soil Classifications
National Guard Armory Expansion
Infrantry Road
Wilmington, North Carolina
RFTS Job No. 942-14
Loc Soil Description
1 Topsoil
Brownish. Yellow fine SAND.
trace of Clay
Brownish Yellow CIa:vey SAND
Yellow: fine to medium SAND
Light Gray fine SAND with Clay
Light Gray fine to medium
SAND
Hue
Value
Chroma
Depth Comments
(in.)
-
-
-
0-6 -
I OYR
6
6
6-30
IOYR
6
6
36-60
10YR
7
6
72-90
10YR
7
2
102-120 SHWT@,102"
10YR
7
1
162-180

P u i
�.r '�� - L
tR
All'..1 ZT
9716dYi22"1"-kiiC--:L.'IffA

71
RF[,S May 16, 2014
IRMEW
Soils Engineering and Testing Services
Tripp Engineering, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Attention: Mr. Phil Tripp, P.E.
Reference: Infiltration Testing
Proposed National Guard Armory Expansion
Infantry Road
Wilmington, North Carolina
RFTS Job No. 942-14
Dear Mr. Tripp:
RFTS is pleased to continue to provide testing services during the design phase of the
proposed National Guard Armory Expansion project located off Infantry Road in
Wilmington, North Carolina. Specific site grading plans had not been provided to us at
the time this report was prepared.
DESCRIPTION OF ACTIVITIES AND FINDINGS
As requested, our staff recently returned to the site to perform infiltration testing in the
area of the proposed stormwater infiltration basin as identified by you. The purpose of
this testing was to provide soil parameters for stormwater infiltration design.
Infiltration Testing
Infiltration testing was performed using a model 2800 Guelph Permeameter which is a
constant -head device which operates on the Mariotte siphon principle and is referenced in
ASTM D-5126. The permeameter is used to determine field saturated hydraulic
conductivity in centimeters per second for soil at a specified depth. This testing involves
advancing a borehole to the desired infiltration depth and introducing water at a constant
head to determine the steady state flow rate from which the hydraulic conductivity can be
calculated.
Our testing was performed approximately 70 inches below the existing ground surface.
The results of our permeameter testing are presented in Table 1.
SEP 0 4 2014
RFTS, PLLC Committed to Responsive Service Office: 910-456-1377
1305 3A Carolina Beach Ave N
Carolina Beach. North Carolina 28428 www.rftspllc.com Fax: [phone]

Tripp Engineering, P.C.
RFTS Job No. 942-14
RECOMMENDATIONS
May 16, 2014
Page Two
Based on the results of our field testing and soil classifications at the test location, we
offer the following recommendations for stormwater infiltration design:
At the test location INF-1 it is our opinion that in order to achieve the steady state flow
rate obtained during our testing; the areas of infiltration galleries or other infiltration
structures should introduce stormwater at approximately 70 inches below the existing
ground surface elevation. For purposes of sizing the structures we recommend an
ultimate application rate of 1.2 inches per hour. These recommendations should be
reviewed by appropriate regulatory authorities before finalizing the details of any civil
design.
CLOSURE
Please find attached our field data and a sketch showing the approximate test locations.
If you have any questions after reviewing this letter, please do not hesitate to contact us at
your convenience.
Sincerely,
RFTS,PLLC
Davi WLsteaA+
K7
Field Operations Manager
DLW:SDK/dlw
Attachments
Steven D. Kelly P.E.
Senior Engine
NC Registration No. 17638
k% CARgo"O "�,
EE3Sln .,.,9
9EA1
.7638
y
NG/ N0tW/-
*seems**
OALTMA •.••'
1b413.1.10 %

Table 1
Guelph Permeameter Test Results
National Guard Armory Expansion
Wilmington, North Carolina
Rr TS Job No. 942-14
Location
1
Depth (in.)
70
Hi (cm)
5
R, (cm/min)
4.2
Rls (cm/sec)
0.07
H2 (cm)
10
R2 (cm/min)
5.8
Res (cm/sec)
0.098
Kfs (cm/sec)
8.38x10
Kfs (in/hr)
1.2
Definition of Terms
R1,2 — Established 3 or more constant rate of water level change (cm/min)
RI s, 2s — Calculated steady state flow rates (cm/sec)
HI,2 — Maintained Head of H2O (cm)
Kfs — Calculated field saturated hydraulic conductivity (cm/sec)
Depth — Depth of well hole (in.)
Location — Test location identification number
Note: Diameter of well is 3.0 cm.

Casmer, Jo
From: Casmer, Jo
Sent: Monday, September 22, 2014 4:40 PM
To: 'rex.w.williams.nfgQmail.mil; Tripp Engineering'
Subiect: Wilmington Readiness Center Renovation North Carolina National Guard; Stormwater Permit
SW8 140906
The Wilmington Regional Office of the Division of Energy, Mineral, and Land Resources (Stormwater Section) received the
Stormwater Permit Application and $505.00 fee on September 4, 2014. Your project will be assigned to a staff member
and you will be notified if additional information is needed. Please be advised that the construction of built -upon area may
not commence until the Stormwater Permit is issued.
fo Casmer
Administrative Assistant for DEMLR/Stormwater Section
NC Department of Environment & Natural Resources
Division of Environmental Assistance & Customer Service
127 Cardinal Drive Extension
1Wiimington, NC 28405
Phone: [phone]
Fax: [phone]
Email mimspondence to and from this address may be subject to the North Carolina Public Records Law and may be disdosed to third
pa►ties

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
September 4, 2014
NCDENR
Division of Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Kelly Johnson
Re: Wilmington Readiness Center Renovation North Carolina National Guard
New Hanover County, NC
TE 13031
Dear Kelly:
Enclosed please find the following items for review:
• 2 sets of plans
• $505 check
• Narrative
• Stormwater application — one original and one copy
• Infiltration Basin Supplement
• Operation and Maintenance Agreement
• Calculations
• Soils Report
• USGS map
• Copy of the Deed
Please review for approval and contact us with any questions, comments or if
you need additional information. Thank you.
Sincerely,
Tripp Engineering, P.C.
l% Cr V�
Monica L. Valsi, E.I.
MLV:dcb
Enc.
�ECEIVEn
SEP 0 4 2014 � p
er:_ ��

4;t7fiD�ICaGnC'� eieirorcinr �,i�ci:R�1�i
Project Name: (r+�t,i,.. Received Date: 2e�
Project Location: a� Accepted Date:
��
Rule(s) 8 Coastal 1995 Coastal ®Phase II (WiRO) Universal ®1988 Coastal
00®
Type of Per ' : Ne or Mod or PR Existing Permit # (Mod or PR): ®PE Cert on File?
®ensity:.::-HD._._:..pr._.....:..LD_.:
hype::_.Corn-me.rci.a.l.—o.r-=---Residential--;
_._._.
--
NCG=
1(%
00)
1 Stream class.
I�SA
Map 1
I A �Oiisiie iu SW8
Subdivided?: Subdivision or Single Lot II IORW Map I I IExem
Paperwork Emailed Engineer on:
up ment(s) (1 original per BMP) BMP Type(s):
0&M with correct/original signatures (1 original per BMP except LS/VFS and swales)
p Tication with correct/original signatures eed
E]Corp or LLC: Sig. Auth. per SoS or letter Demail Address: Design Engineer
05 (within 6mo) it Address: Owner
0 oils Report with S+fV.VT- Note to Reviewer:
®Calculations (signed/sealed) �.,� �� f �r--� .¢- �,� F���-(�✓�'�'� `�
®No obvious errors 0" -'e-
®Density includes common areas, etc 1-M-
Deed Restrictions, if subdivided:
—ISiened & Notarized
Plans
Sets ails (roads, cul-de-sacs, curbs, sidewalks, BMPs, Buildings, etc)
h:Gra Wetlands: Delineated or No Wetlands
icinity Map ayout (proposed BUA dimensions)
egend ®DA Maps ®Project Boundaries
Infiltration
Soils Report
Bottom:
Additional Information:
Permitted
BUA (sf)
DA (sf)
PP (el)
SHWT (el)
Depth (ft)
SA (sf
Wet Pond
®Soils Report
SHWT:
PP:
Mite
MPE Cert for Master
®Deed Rest for Master
BUA Permitted (Master):
BUA Proposed (Offsite):
Lot #:
®Lot # Matches Master
sf
sf