HomeMy WebLinkAboutSW6110903_CURRENT PERMIT_20110921STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
Al1, Z
YYYYMMDD
MDE R
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Division of Water Quality
Coleen H. Sullins
Director
September 21, 2011
Mr. David Heins, DPW/Environmental Division Chief
Fort Bragg
2175 Reilly Road Stop A
Fort Bragg, North Carolina 28310
Subject: Stormwater Permit No. SW6110903
JSOC, SOF Squadron HQ Addition
Cumberland County
Dear Mr. Heins:
®ENR—FRO
SEP 2 6 2011
®WQ
Dee Freeman
Secretary
The Stormwater Permitting Unit received a complete Stormwater Management Permit Application for the JSOC,
SOF Squadron HQ Addition on September 19, 2011. Staff review of the plans and specifications has determined
that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000
and Session Law 2006-246. We are forwarding Permit No. SW6110903, dated September 21, 2011, for the
construction, operation and maintenance of the subject project and the stormwater BMPs.
This permit shall be effective from the date of issuance until September 20, 2021, and shall be subject to the
conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance
requirements in this permit. Failure to establish an adequate system for inspection and maintenance of the
stormwater management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an
adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must
be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 2761 1-7447. Unless such demands are
made this permit shall be final and binding.
This project will be kept on file at the Fayetteville Regional Office. If you have any questions, or need additional
information concerning this matter, please contact Mike Randall at (919) 807-6374; or mike.randall@ncdenr.gov.
Sincerely,
for Coleen H. Sullins
cc: (Faytteville Regional Office
SPU Files
Wetlands and Stormwater Branch t.TOne !�
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 iv OrffiCarci
Phone:: 612 N. Salisbury St. 19-807- North Carolina 47604 a attune //y
Phone: 919A07-6300\FAX: 919b07-64941 Customer Service:l-877-623-6748 ��/K ` "
Internet: www.ncwaterquality.org
An Equal Oppodunily 1 Aarmabve Action Employer
State Stormwater Permit
Permit No. SWE.110903
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Fort Bragg
JSOC, SOF Squadron HQ Addition
Cumberland County
FOR THE
construction, operation and maintenance of four bioretention cell(s) in compliance with
the provisions of Session Law 2006-246 and 15A NCAC 2H .1000 (hereafter referred to
as the "stormwater rules') and the approved stormwater management plans and
specifications and other supporting data as attached and on file with and approved by
the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until September 20, 2021, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
This stormwater system has been approved for the management of stormwater
runoff as described in this permit. The stormwater control has been designed to
handle the runoff from the impervious area.
The tract will be limited to the amount of built -upon area as indicated in this
permit, and per the application documents and as shown on the approved plans.
All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
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 built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent surface waters.
7. The design criteria as provided in the per the application documents, bioretention
cell supplements and as shown on the approved plans must be maintained:
Page 1 of 4
State Stormv.ater Permit
Permit No. OW61 10903
II. SCHEDULE OF COMPLIANCE
During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
The permittee shall at all time provide the operation and maintenance necessary
to assure the permitted stormwater system functions at optimum efficiency. The
approved Operation and Maintenance Plan must be followed in its entirety and
maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowin.9 and re -vegetation of slopes and the filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans.
f. Debris removal and unclogging of all drainage structures, level spreader,
filter media, planting media, underdrains, catch basins and piping.
g. Access to the cell and outlet structure must be available at all times.
4. 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 permittee shall prepare an annual summary report of the maintenance and
inspection records for each BMP. The report shall summarize the inspection
dates, results of the inspections, and the maintenance work performed at each
inspection.
6. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
7. 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.
8. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
9. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
Page 2 of 4
State Stormwater Permit
Permit No. SW6110903
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
13. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a completed Name/Ownership Change form signed by both parties, to the
Division of Water Quality, accompanied by the supporting documentation as
listed on page 2 of the form. The approval of this request will be considered on
its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves a request to transfer the permit.
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
6. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
Page 3 of 4
State Stormwater Permit
Permit No. SW6110903
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Session Law 2006-
246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
12. The permittee shall submit a renewal request with all required forms and
documentation at least 180 days prior to the expiration date of this permit.
Permit issued this the 21st day of September, 2011.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Division of Water Quality
By Authority of the Environmental Management Commission
Page 4 of 4
State Stormwater Permit
Pr,rmit No. SW6110903
JSOC, SOF Squadron HQ Addition
Stormwater Permit No. SW6110903
Cumberland County
Designer's Certification
1, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
JSOC, SOF Squadron HQ Addition
(Project Name)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
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 1 of 2
State Stormwater Permit
Permit No. SW,3110903 '
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 outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation, per the vegetation plan.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Page 2 of 2
DWQUSEONLY
Date Received
Fee Paid
Permit Number
450 4 S 53o
I 6w to I t o q 0 3
Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph II - Post Construction
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan
❑ Other WQ Mgmt Plan:
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I *YZ.MW.WrOMO t r] i51:1tIILivi
1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
ISOC, SOF Squadron HQ Addition (LI 60821)
2. Location of Project (street address):
To the west of Malvesti Road approximately 450 feet after passingthrough hrough the main ISOC compound security
access gate off of Butner Road.
City:Fort Bragg County:Cuntberland Zip:28310
3. Directions to project (from nearest major intersection):
Proceed north on Malvesti Road. The developed site is situated at existing building number 3-3242. The
existing overflow parking is located to the south of the project site.
4. Latitude:35° 09' 39.30" N Longitude:79° 00' 33.00" W of the main entrance to the project.
It. PERMITINFORMATION:
1. a. Specify whether project is (check one): ®New ❑Modification
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 ®High Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from DWQ
requesting a state stormwater management permit application, list the stormwater project number, if
assigned, N/A and the previous name of the project, if different than currently
proposed, N/A
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑LAMA Major
❑NPDES Industrial Stormwater
®Sedimentation/Erosion Control: 4.02 ac of Disturbed Area
❑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:
FormSWU-101 Version07Jun2010 Page I of
Ill. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization: Directorate of Public Works (DPW)
Signing Official & Title:Mr. David Heins, DPW/Environmental Division Chief
b.Contact information for person listed in item la above:
Street Address:2175 Reilly Road Stop A
City:Fort Bragg State:NC Zip:28310
Mailing Address (if opplicable):2175 Reilly Road Stop A
City:Fort Bragg State:NC Zip:28310
Phone: (910 ) 396-8207
Email:david.a.heins@us.army.mil
Fax: (910 ) 907-2420
c. Please check the appropriate box. The applicant listed above is:
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/I
Signing Official &
b. Contact information for person listed in item 2a above:
Street Address:
Mailing Address (if
Phone:
Fax:
Zip:
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: Mr. Lee Ward
Signing Official & Title:DPW / Water Management Branch (WMB)
b. Contact information for person listed in item 3a above:
Mailing Address:Bldg. 0-9125, McKellars Road
City:Fort Bragg State:NC Zip:28310
Phone: (910 ) 396-2301 x218
Email:lee.p.ward@us.army.mil
4. Local jurisdiction for building permits:
Fax: (910 ) 907-2420
Point of Contact: Phone #:
FormSWU-101 Vcrsion07Jun2010 Page2of6
IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Water quality and quantity will be provided by 4 proposed bioretention devices. Pretreatment will be
provided by gravel and grass filter strips for bioretention area #1 and riprap lined entrances for bioretention
areas #2, #3, and #4.
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:
It. 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
4. Total Property Area: 4.02 acres
River basin.
5. Total Coastal Wetlands Area: 0.00 acres
6. Total Surface Water Area: 0.00 acres
7. Total Property Area (4) -Total Coastal Wetlands Area (5) -Total Surface Water Area (6) = Total Project
Area':4.02 acres
Total project area slall be calculated to exclude thefollotoing. the normal pool of impounded structures, the area
between the banks of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHW)line, and coastal wetlands landward from the NHW (or MHW) line. Tire resultant / ro' ct area is used to
calculate overall percent built upon area (BUA). Non -coastal wetlands landward of the NHW (or MHW) line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 55 %
9. How many drainage areas does the project have?4 (For high density, count 1 for each proposed engineered
storrwater 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 2
Drainage Area 3
Drainage Area 4
Receiving Stream Name
Tank Creek
Tank Creek
Tank Creek
Tank Creek
Stream Class *
C
C
C
C
Stream Index Number *
18-23-27
18-23-27
18-23-27
18-23-27
Total Drainage Area (sf)
13986
9131
12867
4208
On -site Drainage Area (so
7936
9131
9580
4208
Off -site Drainage Area (st)
6050
0
3287
0
Pro osed Impervious Area** (so
7005
7260
8460
2001
Impervious Area** total
50
80
66
48
Impervious— Surface Area
Drainage Area 1
Draina e'Area 2
Drainage Area 3
Drainage Area 4
On -site Buildings/Lots (sf)
0
6860
0
0
On -site Streets (so
0
0
0
0
On -site Parking (so
3971
0
'4358
1645
On -site Sidewalks (sf)
238
400
150
356
Other on -site (so
0
0
0
0
Future (so
0
0
0
0
Off -site (so
2796
1 0
3287
1 0
Existing BUA*** (so
0
1 0
665
0
Total (so:
7005
1 7260
8460
2001
Stream Class and Index Number can be determined at: Irttp://portal.rrcdenr.org,web/wq/ps/csu/classi cations
Form SWU-101 Version 07Iun2010 Pace 3 of
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Report only that amount of existing BUA that will rentain after development. Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
11. How was the off -site impervious area listed above determined? Provide documentation. Field survey and
Projects in Union County: Contact DWQ Central Office staffto check ifthe project is located within a Threatened &
Endangered Species watershed that may be subject to more stringent stormwater requirements as per NCAC 02B .0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) foam
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from http://portal.ncdenr.org/web/wq/ws/su/ban-manual.
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. A detailed application instruction sheet and BMP
checklists are available from http//portal.ncdenr.org/web/wq/ws/su/statesw/forms does. The complete
application package should be submitted to the appropriate DWQ Office. (The appropriate office may be
found by locating project on the interactive online map at http://portal.ncdenr.org/web/wq/ws/su/maps.)
Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions
for each submitted application package from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms does.
nitials
1. Original and one copy of the Stormwater Management Permit Application Form. -3�S •S•
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form. (if required as per Part VII below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envlielp.org/12ages/`onestopexi2ress.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/management
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1/2
mile radius on the map.
7. Sealed, signed and dated calculations.
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
I. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
N /A
7-S.S.
7.J.S,
for
3S.J,
Form S WU-101 Version 07Jun2010 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 $, $•
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 DWQ to verifij the SHWT prior
to submittal, (910) 796-7378.)
10. A copy of the most current property deed. Deed book: Page No:
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC /d��}
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item la, 2a, and/or 3a per NCAC 21-1.1003(e). The
corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
http://www.secretary.state.nc.us/Corporations/CSearch.aspx
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be
provided as an attachment to the completed and notarized deed restriction form. The appropriate deed
restrictions and protective covenants forms can be downloaded from
http://portal.ncdenr.org/web/wq/ws/su/statesw/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 DWQ and that they will be recorded prior to the sale of any lot.
V III. 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.Mr. Jason Sesler, P.E.
Consulting Firm: Greenhorne & O'Mara inc
Mailing Address:5565 Centerview Drive, Ste. 107
City:Raleigh State:NC Zip:27606
Phone: (919 ) 325-4777
E mai I: isesle r@g-and-o. c om
Fax: (919 ) 851-8393
IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this
section)
I, (print or hjpe name of person listed in Contact Information, item 2a) I certify that I
own the property identified in this permit application, and thus give permission to (print or hjpe name of person
listed in Contact Information, item la) with (print or hjpe name of organization listed in
Contact Information, item la) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Form SWU-101 Version 07Jun2010 Page 5 of
As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to
me, the property owner. As the property owner, it is my responsibility to notify DWQ 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 p alf s/o up to $25,000 per day, pursuant to NCGS 143-215.6. �7 /
Signature :Gini Date: 1 °�
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
X. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in Contact Information, item la) Mr. David Heins
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 2I-1 .1000, SL 2006-246 (Ph. II - Post Construction) or SL 2008-211.
Signature:
I, 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
Form SWU-101 Version 07Jun2010 Page 6 of 6
GREENHORNE & O'MARA, INC. &-0 Lo 1 k 0 103 5530
Phone:919-851-1919
5565 Centerview Drive Suite 107 66-0521531
Raleigh, NC 27606 Q BRANCH Irma
Date Slit) I'I
to the—N C D
III WACHOVIA
WacMNa Bank. a dWISIOn al MCA Farpa Bank. N.A.
FOR_C(tr M % Pro���� CAL449Q
11'00553011' i:0531016261:
2000000 3 2 5 2u'
Ft. Bragg, SOF Squadron HQ Addition Project
Stormwater Management Narrative
The proposed project known as Fort Bragg JSOC Squadron HQ Building Addition
consists of a new 2-story building addition to the existing 2-story building (Building 3-
3242), associated parking and utilities, and bioretention stormwater management
devices. This report presents the stormwater management calculations for the project
The property is located on Fort Bragg in Cumberland County, North Carolina with
access to the site off of Malvesti Street. The SOF Squadron HQ Addition is located in
the Southwest section of the Joint Special Operations Command (JSOC) compound
between Malvesti Street to the east and the JSOC compound limits to the west. The
existing developed site is situated just north of the Butner Road security
checkpoint/JSOC Visitors Center. A large existing asphalt parking lot is located
directly south of the project site, which serves as general parking for the JSOC
compound. The existing parking areas located to the west and north of the existing
building are dedicated parking areas for Buildings 3-3242 and 3-3443. The scope of
work for the Squadron HQ Addition project includes civil site work and site utilities
design along with demolition of the existing site and utilities to support the construction
of the new SOF Squadron HQ Addition.
The project site is located on a developed site with areas of existing woods and
wetlands primarily to the north of the project site and areas of existing grass primarily
to the west. This project will disturb 0.041 Ac. of existing wetlands. Ft. Bragg has
already received the approved Army Corps of Engineers Nationwide Permit #39 for
approval to disturb the above mentioned wetlands. A copy of the approved Nationwide
Permit #39 is included in the civil calculation package. Most of the existing parking
areas and drive aisles serving this project will be removed and replaced with new
parking areas and drive aisles. There is an existing single story office trailer (Building
3-3443) and portions of the existing perimeter unpaved patrol road on the project site
that will be removed. The proposed site will disturb greater than 1.0 acre and the built
upon area will be greater than 24% of the site area, and is therefore considered a high
density project. The state of North Carolina's Stormwater Management Phase II Post
Construction ordinance requires new high density development projects to provide
stormwater management water quality treatment for the first inch of runoff for the
newly created impervious areas and to provide water quantity control for the 1-year
storm event. This project is also required to meet LEED accreditation; therefore, water
quantity control for the 2-year storm event will be provided.
Because this site is an existing developed site, and the stormwater management
requirements require only the new impervious areas to be treated, the site has been
broken down into one overall area for the purposes of determining the required
stormwater management volume requirements. The individual drainage areas for the
four bioretention devices have been provided to properly size each bioretention device
based upon the actual drainage area it receives. The new building addition's
Pagel of 2
. . 1
impervious area is treated in Bioretention Facility #2, and Bioretention Facility #1, #3,
and #4 primarily receive drainage from both existing and new parking lot impervious
areas. Both water quality and water quantity stormwater management are provided in
the four bioretention areas. Water quality control is provided for the first inch of runoff
and the bioretention areas provide 85% total suspended solids removal. Water
quantity control for the 1- and 2-year storm events is also provided in the proposed
bioretention devices such that development runoff rates are less than predeveloped
conditions for the project. The existing off -site impervious areas that drain to the
bioretention areas have been accounted for in the proposed bioretention areas with
respect to both the water quality and water quantity stormwater management
requirements.
The analysis followed the Simple method and other generally accepted engineering
practices. The Simple method was used to calculate the required stormwater
management volumes by subtracting the pre -developed runoff coefficient from the
post -developed runoff coefficient and inserting that value into the Simple method
formula, thus the volume associated with the newly created impervious areas is being
treated and accounted for. The developed site will add 19,773 sf of impervious area
and the bioretention areas receive and treat 24,726 sf of impervious areas. The
required 1-year quantity management is 4,746 cf and the bioretention devices provide
5,798 cf of storage. The drainage areas were delineated from field prepared
topographic survey. Existing impervious area calculations were based on existing
field surveys. Post development impervious areas were based on the proposed site
plan. A geotechnical engineer calculated the infiltration rates of the existing soils and
determined that the infiltration rate of the soils were expected to be significantly less
than 2.00" an hour; therefore, perforated underdrain piping in a stone layer is provided
at the bottom of all four bioretention areas. All four bioretention areas will have a
ponding depth of 12-inches with an overflow inlet structure connecting to the storm
drain outlet structure system. The overflow inlet structure's grate will be set at the
ponding depth elevation with adequate freeboard provided above the ponding depth
elevation. The four bioretention areas will be planted with grass, shrubs, and or trees
and will have either 2 or 4-feet of soil media beneath the planting material. The water
quality volume requirements will be provided in the surface ponding volume and the
water quantity volume requirements will be provided using a combination of the
surface ponding volume and the void space volume in the soil media and stone within
the limits of the bioretention areas. The bottom of the bioretention areas are at least
2.0' feet above the seasonal high water elevation as determined by the project
geotechnical engineer. The seasonal high water table was determined to be at
elevation 230.00 and the bottom of the bioretention areas vary from either 233.00 or
232.00. The design storm events 1, and 2-year were based on the rainfall data from
NRCS for Cumberland County, NC. Per conversations with NCDENR DWQ, the
stormwater management design approach as presented here is acceptable.
Page 2 of 2
Permit Number:
(to be provided by DWD)
1
_
A.;Y
YlFifyOL
CLO
f
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
BIORETENTION CELL SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
L PROJECT INFORMATION_
Project name
JSOC SOF Squadron HO Addition (LI 60821)
-
Contact name
Jason Sesler
Phone number
(919) 325A777
-
Date
September 9, 2011
Drainage area number
Bioretention Area #1 (Drainage Area 1I
II.- DESIGN ,INFORMATION „
Site Characteristics
Drainage area
13,986 ft'
Impervious area
7,005 R'
Percent impervious
50.1% %
Design rainfall depth
-- 1.0 inch
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
Y _ (Y or N)
1-yr, 24-hr runoff depth
3.2 in
1-yr, 24-hr intensity
- 5.22 in/hr
Pre -development 1-yr, 24-hr peak flow
- ft'/sec
Post -development 1-yr, 24-hr peak flow
- - ft'/sec
Pre/Post 1-yr, 24-hr peak control
ft'/sec
Storage Volume: Non-SAWaters
Minimum volume required
581.0 ft'
Volume provided
- 606.0 ft'
OK
Storage Volume: SAWaters
1.5' runoff volume
ft'
Pre -development 1-yr, 24-hr runoff
ry'
1
Post -development 1-yr, 24-hr runoff
.. ry'
\\\n C ARO
Minimum volume required
0 ft'
"\Q. SSi ••;/y
�Q.•.9
Volume provided
ry3
_ . pF�
Cell Dimensions
= • a S E A Ei
Fording depth of water
12 inches
OK
- 2 1 7 7
Fording depth of water
1.00 ft
•• �.N :
Surface area of the top of the bioretention cell
-: 606.0 ftZ
OK
E
G I NLengthi
44 It
OK
7,/
Width:
- ft
OK
I1IIIS0S\\\\ Zol(
�•
-or- Radius
If
IS , rV
Media and Soils Summary
Drawdown time, ponded volume
9.6 hr
OK
Drawdown time, to 24 inches below surface
- 15.3 hr
OK
Drawdown time, total:
24.9 hr
In -situ soil..
Soil permeability
0.10 in/hr
Insufficient. Increase infiltration rate or include underdrains.
Planting media soil:
Soil permeability
0.52 in/hr
OK
Soil composition
• Sand (by volume)
85%
OK
• Fines (by volume)
10%
OK
• Organic (by volume)
5%
OK
Total
100%
Phosphorus Index (P-Index) of media
30 (unitless)
OK
Form SW401-aioretentlon-Rev.8
June 25, 2010
Parts I and II. Design Summary, Page 1 of 2
Basin Elevations
Permit Number:
(to be provided by DWQ)
Temporary pool elevation
239.00 fmsl
Type of bioretention cell (answer "Y' to only one of the two
following questions):
Is this a grassed cell?
(Y or N)
Is this a cell with trees/shrubs?
y (Y or N)
Planting elevation (top of the mulch or grass sod layer)
:. 238 fmsl
Depth of mulch
0 inches
Bottom of the planting media soil
= 234 first
Planting media depth
4 it
Depth of washed sand below planting media soil
- 0 ft
Are underdrains being installed?
Y
(Y or N)
How many clean out pipes are being installed?
4
What factor of safety is used for sizing the underdrains? (See
2
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
1 it
bottom of the cell to account for underdrains
Bottom of the cell required
233 fmsl
SHWT elevation
230 fmsl
Distance from bottom to SHWT
3 it
Internal Water Storage Zone (IWS)
Does the design include IWS
— N
`- (Y or N)
Elevation of the top of the upturned elbow
fmsl
Separation of IWS and Surface
238 ft
Planting Plan
Number of tree species
1
Number of shrub species
2
Number of herbaceous groundcover species
3
Additional Information
Does volume in excess of the design volume bypass the
Y
(Y or N)
bioretenlion cell?
Does volume in excess of the design volume flow evenly distributed
Y
(Y or N)
through a vegetated filter?
What is the length of the vegetated filter?
30 ft
Does the design use a level spreader to evenly distribute flow?
N
'' (Y or N)
Is the BMP located at least 30 feel from surface waters (50 feet if -
Y
(Y or N)
SA waters)?
Is the BMP located at least 100 feet from water supply wells?
" Y
(Y or N)
Are the vegetated side slopes equal to or less than 3:1?
Y
(Y or N)
Is the BMP located in a proposed drainage easement with access
Y
(Y or N)
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
1 ft/sec
Is the area surrounding the cell likely to undergo development in
N
(Y or N)
the future?
-
Are the slopes draining to the Norelention cell greater than 20%? N
Is the drainage area permanently stabilized?
Pretreatment Used
(Indicate Type Used with an "X' in the shaded cell)
Gravel and grass
(81inches gravel followed by 3-5 it of grass)
Grassed Swale
Forebay
Other
Y_
(Y or N)
(Y or N)
X
OK media depth
Insufficient mulch depth, unless installing grassed cell.
OK
OK
Cl:
OK
79
OK
Show how flow is evenly distributed
OK
OK
OK
OK
OK
OK
OK
OK
y
Form SW401-Bioretention-Rev.8
June 25, 2010 Parts I and II. Design Summary, Page 2 of 2
Permtt No:
Ito be assigned by DWQJ
IIf- REQUIRED ITEMS .CHECKLISTT'�.��'"
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials
Ts's'
Sheet No.
-4107.
1. Plans (1' - 50' or larger) of the entire site showing:
C61o$
- Design at ultimate build -out,
C-S.il
-Off-site drainage (if applicable),
C- r f 3
- Delineated drainage basins (include Rational C coefficient per basin),
- Cell dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
ux1.
G-1 iL
2. Plan details IV = 30' or larger) for the bioretention cell showing:
G SIB
Cell dimensions
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
Indicate the P-Index between 10 and 30
3. Section view of the bioretention cell IV = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Underdrain system (if applicable), and
- Biorelention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
SHWT level(s), and overflow structure]
�f'f-
_
Sn1
4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
WALT
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information. All
elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
LJ 161
- Soil composition (% sand, % fines, % organic), and
- P-index.
5. A detailed planting plan (I" = 20' or larger) prepared by a qualified individual showing:
L49 So
A variety of suitable species,
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
Ti. jr,
6. A construction sequence that shows how the bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
�rJrf.
GgCu
7, The supporting calculations (including underdrain calculations, if applicable).
5 3 S•
'I TflC tq E98
A copy of the signed and notarized inspection and maintenance (I&M) agreement.
z f S,
r lQ
9. A copy of the deed restriction.
Form SW401-13ioretemw-Rev 7 Part III, Page 1 of 1
permit Number:
(to be provided by DWQ)
Drainage Area Number:
Bioretention 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 operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice.weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a .
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of
BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Plow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Resaabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic lime shall be applied as
pUl has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form SW401-Bioretention Od M-Rev.3 Page 2 of 4
BMP element:
Potentialproblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Fonn SW401-Bioretention O&M-Rev.3 Page 3 of 4
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to.the system or responsible party.
Project name:JSOC, SOF Squadron FIO Addition (LI 60821)
BUP drainage area number:
Print name:Mr. David Heins
Title:DPW/Environmental Division Chief'
Address:2175 Reilly Road Stop A, Fort Bragg, NC 28310
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.
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
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SEAL
My commission
Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4
Permit Number:
(to be provided by DWQ)
®RWA o=eF wATE9Of
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
BIORETENTION CELL 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 JSOC, SOF Squadron HQ Addition (1-I60821)
Contact name Jason Sesler
Phone number
Date
Drainage area number
(919) 325-4777
September 9, 2011
Bioretenllon Area #2 (Drainage Area #2) -
II. DESIGN INFORMATION_ "
Site Characteristics
Drainage area
Impervious area
Percent impervious
Design rainfall depth
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak control
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5' runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Cell Dimensions
Pending depth of water
Pending depth of water
Surface area of the top of the bioretention cell
Length.
Width:
-or- Radius
Media and Soils Summary
Drawdown time, ponded volume
Drawdown time, to 24 inches below surface
Drawdown time, total:
In -situ soil:
Soil permeability
Planting media soil:
Soil permeability
Soil composition
• Sand (by volume)
• Fines (by volume)
• Organic (by volume)
Phosphorus Index (P-Index) of media
Form SW401-Bioretention-Rev.8
June 25, 2010
9,131 ftz
7,260 ftz
79.5% %
1.0 inch
Y (YorN)
3.2 in
5.22 in/hr
ft'/sec
ft'/sec
587.0 ft'
1
615.0 ft'
OK
J��� \ C A
W
_ SEAL 9
2177�
Off'
`
lIISIHIS0S\���
-- 12inches
OK
1.00 If
15 f
615.0 ft2
OK
33 ft
OK
--' 19ft
OK
It
8 hr OK
12.8 hr OK
20.8 hr
0.10 in/hr Insufficient. Increase infiltration rate or include underdrains.
0.52 Whir OK
85% OK
10% OK
5% OK
Total: 100%
30 (unilless) OK
201,
Parts I and II. Design Summary, Page 1 of 2
Permit
(to be provided by DV✓Q)
t
Basin Elevations
Temporary pool elevation
236.00 fmsl
Type of bioretention cell (answer'Y' to only one of the two
following questions):
Is this a grassed cell?
Y (Y or N)
Is this a cell with trees/shrubs?
,- - '(Y or N)
Planting elevation (top of the mulch or grass sod layer)
235 fmsl
Depth of mulch
0 inches
. Bottom of the planting media soil
- 233 fmsl
Planting media depth
2 If
Depth of washed sand below planting media soil
0 ft
Are underdrains being installed?
'. Y '- (Y or N)
How many clean out pipes are being installed?
3
What factor of safety is used for sizing the underdrains? (See
2
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
1 ft
the bottom of the cell to account for underdrains
Bottom of the cell required
232 fmsl
SHWT elevation
230 fmsl
Distance from bottom to SHWT
2 It
Internal Water Storage Zone (IWS)
Does the design include IWS
N (Y or N)
Elevation of the top of the upturned elbow
fmsl
Separation of IWS and Surface
235 ft
Planting Plan
Number of tree species _
Number of shrub species
Number of herbaceous groundcover species _
Additional Information
Does volume in excess of the design volume bypass the
bioretention cell?
Does volume in excess of the design volume Flow evenly distributed
through a vegetated filler? -
What is the length of the vegetated filter?
Does the design use a level spreader to evenly distribute flow?
OK
Insufficient mulch depth, unless installing grassed cell.
OK
C07.6
-Y (Y or N) OK
Y (YorN) OK
if) ft
N (Y or N) Show how flow is evenly distributed.
Is the BMP located at least 30 feel from surface waters (50 feet if
Y -
(Y or N)
OK
SA waters)?
Is the BMP localed at least 100 feet from water supply wells?
- Y
(Y or N)
OK
Are the vegetated side slopes equal to or less than 3:1?
Y
(Y or N)
OK
Is the BMP located in a proposed drainage easement with access-
Y
(Y or N)
OK
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
_
1 fYsec
OK
Is the area surrounding the cell likely to undergo development in
N
(Y or N)
OK
the future?
Are the slopes draining to the bioretention cell greater than 20%?
N
(Y or N)
OK
Is the drainage area permanently stabilized?
Y
(Y or N)
OK
Pretreatment Used
(Indicate Type Used with an'X' in the shaded cell)
Gravel and grass
(flinches gravel followed by 3-5 ft of grass)
Grassed Swale -
#VALUE!
Forebay
-
Other
X
Form SW401-Bioretention-Rev.8
June 25, 2010 Parts I and II. Design Summary, Page 2 of 2
Permft No:
(to be assigned by DWQ)
1113:REgUIREDITEMSCHECKLIST `
t^
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Sheet No.
TInitials
J�JO.
CGI 01
1. Plans (1- - 50' or larger) of the entire site showing:
66109
- Design at ultimate build -out,
p Z
- Off -site drainage (if applicable),
gl)
- Delineated drainage basins (include Rational C coefficient per basin),
- Cell dimensions,
- Pretreatment system,
- High Flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
SJ.J.
s'IL
2. Plan details (1' = 30' or larger) for the bioretention cell showing:
Cell dimensions
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
_
�.J. f•
G SI Z
- Indicate the P-Index between 10 and 30
3. Section view of the bioretention cell (1' = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Underdrain system (if applicable), and
- Bioretention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
Sr'f
j,
SHWT level(s), and overflow structure)
4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information. All
elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
- Soil composition (%sand, %fines, % organic), and
f
4�
pL
- P-index.
5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing:
SO
- Avarietyofsuitablespecies,
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
_
54
6. A construction sequence that shows how the bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
7. The supporting calculations (including underdrain calculations, if applicable).
TbJ.
QT—,414
8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
J,
. / r
M /a
9. A copy of the deed restriction,
Form SW401-Bioretention-Rev.7 Part III, Page 1 of 1
Permit Number.
(to be provided by DWQ)
Drainage Area Number:
Bioretention 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 operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How 1 will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe,
stone verge 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
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4
BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Plow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hardwood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic lime shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form SW401-Bioretention O&M-Rev.3 Page 2 of 4
BMP element:
Potentialproblems:
flow I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-13ioretention O&M-Rev.3 Page 3. of 4
Permit Number:
(to be provided by DIVQ)
1 acknowledge and agree by my signature below that 1 am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project narne:.ISOC, SOF Squadron HO Addition (LI 60821)
BMP drainage area
Print name:
Title:DPW/Environmental Division Chief
Address:2175 Reilly Road Stop A, Fort Bra"—, NC 28310
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.
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
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SEAL.
My commission expires
Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4
Permit Number'
(to be provided by DWQ)
AM o�eF wArs i
g
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
BIORETENTION CELL 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.
Is PROJECT. -INFORMATION = >_.
Project name JSOC, SOF Squadron HQ Addition (LI 60821)
Contact name Jason Sesler
Phone number (919) 325-4777
Date September 9, 2011 _
Drainage area number Bioretenbon Area #3 (Drainage Area #3) -
II. DESIGN, INFORMATION:'
Site Characteristics
Drainage area 12,867 112
Impervious area 8,460 ft2
Percent impervious 65.7% %
Design rainfall depth 1.0 inch
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
': Y' ":. (Y or N)
1-yr, 24-hr runoff depth
3.2 in
1-yr, 24-hr intensity
5.22 in/hr
Pre -development 1-yr, 24-hr peak flow
ft'/sec
Post -development 1-yr, 24-hr peak flow
ft3/sec
Pre/Post 1-yr, 24-hr peak control
ft'/sec
Storage Volume: Non -SA Waters
Minimum volume required
701.0 fl3
Volume provided
734.0 ft'
Storage Volume: SA Waters
1.5' runoff volume
ft3
Pre -development 1-yr, 24-hr runoff
: ft3
Post -development 1-yr, 24-hr runoff
ft3
Minimum volume required
0 ft3
Volume provided
ft3
Cell Dimensions
Ponding depth of water
Ponding depth of water
Surface area of the top of the bioretention cell
Length:
Width:
-or- Radius
Media and Soils Summary
Drawdown time, ponded volume
Drawdown time, to 24 inches below surface
Drawdown time, total:
In -situ soil:
Soil permeability
Planting media soil.
Soil permeability
Soil composition
% Sand (by volume)
• Fines (by volume)
• Organic (by volume)
12 inches
1.00 1t
734.0 ftz
50 ft
16 ft
ft
9.6 hr
15.3 hr
24.9 hr
0.10 in/hr
0.52 in/hr
OK
An
OK
OK
OK
OK
OK
CARO�ii��
.� p`r 'FESS/O • �?' ��
Q SEAL
2 1777
GINE�
S
7;OAIIIIIIS�S\\\\ 2oI�
/jam f
Insufficient. Increase infiltration rate or include underdrains.
85%
OK
10%
OK
5%
OK
Total: 100%
Phosphorus Index (P-Index) of media 30 (unitless) OK
Form SW401-Bioretention-Rev.8
June 25, 2010
Parts I and II. Design Summary, Page 1 of 2
Permit Number:
(to be provided by DV✓Q)
r
Basin Elevations
Temporary pool elevation
238.00 fmsl
Type of biorelention cell (answer *Y" to only one of the two
following questions):
Is this a grassed cell?
(Y or N)
Is this a cell with trees/shrubs?
Y (Y or N)
OK media depth
Planting elevation (top of the mulch or grass sod layer)
237 fmsl
Depth of mulch -
0 inches
Insufficient mulch depth, unless installing grassed cell.
Bottom of the planting media soil
233 fmsl
Planting media depth
4 it
Depth of washed sand below planting media soil
0 If
Are underdrains being installed?
Y (Y or N)
How many clean out pipes are being installed?
1
OK
What factor of safety is used for sizing the underdrains? (See
2
OK
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
1 ft
the bottom of the cell to account for underdrains
Bottom of the cell required
232 fmsl
SHWT elevation
230 fmsl
Distance from bottom to SHWT
2 it
OK
Internal Water Storage Zone (IWS)
Does the design include IWS N (Y or N)
Elevation of the top of the upturned elbow fmsl
Separation of IWS and Surface 237 it
Planting Plan
Number of tree species 1
Number of shrub species 2
Number of herbaceous groundcover species 3 OK
Additional Information
Does volume in excess of the design volume bypass the - Y (Y or N) OK
biorelention cell?
Does volume in excess of the design volume flow evenly distributed Y (Y or N) OK
through a vegetated filter? _.....
What is the length of the vegetated filler? 30 it
Does the design use a level spreader to evenly distribute flow? N (Y or N) Show how flow is evenly distributed
Is the BMP located at least 30 feet from surface waters (50 feet if
-Y
(Y or N)
OK
SA waters)?
-
Is the BMP localed at least 100 feet from water supply wells?
Y
(Y or N)
OK
Are the vegetated side slopes equal to or less than 3:1?
Y
(Y or N)
OK
Is the BMP located in a proposed drainage easement with access
Y
(Y or N)
OK
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
-
1 f 1sec
OK
Is the area surrounding the cell likely to undergo development in
N
(Y or N)
OK
the future?
Are the slopes draining to the bioretention cell greater than 20%? N: (Y or N) OK
Is the drainage area permanently stabilized? Y (Y or N) OK
Pretreatment Used
(Indicate Type Used with an "X' in the shaded cell)
Gravel and grass
(8inches gravel followed by 3-5 ft of grass)
Grassed swale #VALUE'
Forebay
Other X
Form SW401-Bioretention-Rev.8
June 25, 2010 Parts I and II. Design Summary, Page 2 of 2
Permit No:
(to be assigned by D WQ)
IIU!,REQUIRED'i1TEMS CHECKLIST"
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials
Sheet No.
�•J •(•
CC101
1. Plans (1' - 50' or larger) of the entire site showing:
cc, 0?
- Design at ultimate build -out,
G`SI2
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
G-Sty
-Celldimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
2. Plan details (1' = 30' or larger) for the Bioretention cell showing:
Sty
G'
-Celldimensions
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
_
SI Z
- Indicate the P-Index between 10 and 30
3. Section view of the bioretention cell (P = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Underdrain system (if applicable), and
- Bioretention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
Sa:Ls
SHWT level(s), and overflow structure]
U J.
4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
Wd-T
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information. All
elevations shall be in feel mean sea level (first), Results of soils tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
- Soil composition (% sand, % fines, % organic), and
fL
LP101
- P-index.
5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing:
LPIOL
- A variety of suitable species,
�Qy DI
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
7,14.
(6101
6. A construction sequence that shows how the Bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
7 The supporting calculations (including underdrain calculations, if applicable).
a J • J.
Arr"I, e+fd
B. A copy of the signed and notarized inspection and maintenance (AM) agreement.
S S• J.
1J1eq
g, A copy of the deed restriction.
Form SW401-Bioretention-Rev.7 Part III, Page 1 of 1
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Bioretention 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 operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will betaken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide time and a
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4
BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Flow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has Floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use .
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic time shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form SW401-Bioretention O&M-Rev.3 Page 2 of 4
BMP element:
Potentialproblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Bioretention O&M-Rev.3 Page 3 of 4
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:,ISOC, SOP Squadron 1-10 Addition (LI 60821)
6MP drainage area
Print name:Mr. David Heins
Title:DPW/Enviromnental Division Chief
Address:2175 Reilly Road Stop A, Port Bragg, NC 28310
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, , a 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
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SEAL
My commission
Form SW401-Dioretention 1&M-Rev. 2 Page 4 of
Permit Number:
(to be provided by DWQ)
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
BIORETENTION CELL SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
Project name JSOCI. SOF Squadron HQ Addition (LI 60821)
Contact name Jason Sesler
Phone number (919) 325-4777
Date September 9 2011 -
Drainage area number Bioretention Area #4 (Drainage Area #4) -
Site Characteristics
Drainage area 4,208 ft'
Impervious area -- 2,001 ftz
Percent impervious 47.6% %
Design rainfall depth - 1.0 inch
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak Flow required? Y (Y or N)
1-yr, 24-hr runoff depth 3.2 in
1-yr, 24-hr intensity . 5.22 inthr
Pre -development 1-yr, 24-hr peak flow - ft'/sec
Post -development 1-yr, 24-hr peak flow ft'/sec
Pre/Post 1-yr, 24-hr peak control ft'/sec
Storage Volume: Non -SA Waters
Minimum volume required 175.0 ft' \Vky(111II!/y/
Volume provided 193.0ft' OK \\��CARO7i��i
Storage Volume: SA Waters
1.5' runoff volume ft'Z7?, �OF G�'9�Q}"•9
Pre -development 1-yr, 24-hr runoff
ft' = SEAL/
Post -development 1-yr, 24-hr runoff ft' � 3 21 7 7
Minimum volume required 0 ft'
Volume provided ft' GINE�"F���
Cell Dimensions iii N S. SE
Ponding depth of water 12inches OK 7jr/IIIll1�\�1 ��l
Ponding depth of water 1.00 it l r
Surface area of the lop of the biorelention cell 193.0 ftZ OK
Length: 20 ft OK
Width: 10 ft OK
-or-Radius ft
Media and Soils Summary
Drawdown time, ponded volume
8 hr
OK
Drawdown time, to 24 inches below surface
12.8 hr
OK
Drawdown time, total:
20.8 hr
In -situ soil:
Soil permeability
0.10 in/hr
Insufficient. Increase infiltration rate or include underdrains.
Planting media soil:
Soil permeability
0.52 in/hr
OK
Soil composition
• Sand (by volume)
85%
OK
• Fines (by volume)
10%
OK
• Organic (by volume)
5%
OK
Total: 100%
Phosphorus Index (P-Index) of media
30 (unitless)
OK
Form SW401-Bioretention-Rev.8
June 25, 2010
Parts I and II. Design Summary, Page 1 of 2
Permit Number'
(fa be Provided by DWQ)
Basin Elevations
Temporary pool elevation
Type of bioretention cell (answer "Y' to only one of the two
following questions):
Is this a grassed cell?
Is this a cell with trees/shrubs?
Planting elevation (top of the mulch or grass sod layer)
Depth of mulch
Bottom of the planting media soil
Planting media depth
Depth of washed sand below planting media soil
Are underdrains being installed?
How many clean out pipes are being installed?
What factor of safety is used for sizing the underdrains? (See
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
the bottom of the cell to account for underdrains
Bottom of the cell required
SHWT elevation
Distance from bottom to SHWT
Internal Water Storage Zone (IWS)
Does the design include IWS
Elevation of the top of the upturned elbow
Separation of IWS and Surface
Planting Plan
Number of tree species
Number of shrub species
Number of herbaceous groundcover species
Additional Information
Does volume In excess of the design volume bypass the
bioretention cell?
Does volume in excess of the design volume Flow evenly distributed
through a vegetated f Itef?
What is the length of the vegetated filter?
Does the design use a level spreader to evenly distribute Flow?
Is the BMP located at least 30 feet from surface waters (50 feet if
SA waters)?
Is the BMP located at least 100 feet from water supply wells?
Are the vegetated side slopes equal to or less than 3:1?
Is the BMP located in a proposed drainage easement with access
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
Is the area surrounding the cell likely to undergo development in
the future?
Are the slopes draining to the bioretention cell greater than 20%?
Is the drainage area permanently stabilized?
Pretreatment Used
(Indicate Type Used with an "X" in the shaded cell)
Gravel and grass
(Binches gravel followed by 3-5 ft of grass)
Grassed Swale
Forebay
Other
236.00 fmsl
Y (YorN)
(Y or N)
235 fmsl
0 inches
233 fmsl
2tt
Ott
Na
Insufficient mulch depth, unless installing grassed cell.
Y.. - (YorN)
2 OK
2 OK
1 ft
232 fmsl
230 fmsl
2 It OK
N (YorN)
fmsl
235 If
Y... (YorN) OK
Y (YorN) OK
30 It
N (Y or N) Show how Flow is evenly distributed.
Y (YorN) OK
Y (Y or N) OK
Y -. (YorN) OK
Y (Y or N) OK
1 fusee
N (Y or N)
N (YorN)
Y (Y or N)
X
OK
OK
OK
OK
#VALUE!
Form SW401-Biorelention-Reve
June 25, 2010
Parts I and II. Design Summary, Page 2 of 2
Permit No:
(to be assigned by DWQ)
III. REQUIRED`ITEMS CHECKLIST ...`i'
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Paget Plan
Initials Sheet No.
�.3. t C-GloB
jrf,I. L�sl'L
G-fit?
'art. S�
Sr J..J.
1. Plans (1' - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Cell dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Clean out pipe locations,
- Overflow device, and
Boundaries of drainage easement.
2. Plan details (1' = 30' or larger) for the bioretention cell showing:
- Cell dimensions
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
- Indicate the P-Index between 10 and 30
3. Section view of the bioretention cell (1' = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Underdrain system (if applicable), and
- Bioretention cell layers [ground level and slope, pre-treatment, pending depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
SHWT level(s), and overflow structure)
4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information. All
elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
- Soil composition (% sand, %fines, % organic), and
�1I - P-index.
U' 5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing:
LpSol-Avarietyofsuitablespecies,
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
CGI Of 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
CA L" 7. The supporting calculations (including underdrain calculations, if applicable).
/-(TI'Ad?Z9 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
9. A copy of the deed restriction.
Form SW401-Bioretention-Rev.7 Pan in, Page 1 of 1
Permit Number:
(to be provided by D IVQ)
Drainage Area Number:
Bioretention 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 operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How I will remediate theproblem:
The entire BMP
Trash debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the Swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4
BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Plow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic time shall be applied as
pl-I has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form SW40 I -Bioretention O&M-Rev.3 Page 2 of 4
BMP element:
Potentialproblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or re lace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Bioretention O&M-Rev.3 Page 3 of 4
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. 1 agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project naine:JSOC, SOF Squadron HO Addition (LI 60821)
6MP drainage area
Print name:Mr. David Heins
Title:DPW/Environmental Division Chief
Address:2175 Reilly Road Stop A, Fort Brag-, NC 28310
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, , a Notary Public for the State of
County of , do hereby certify that
personally appeared before me this
day of I , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SEAL
My commission expi
Form SW40 I -Bioretention I&M-Rev. 2 Page 4 of 4