HomeMy WebLinkAboutSW8110326_CURRENT PERMIT_20210525STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 \\WLu
DOC TYPE
N CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
l0 2� 0 S 2'S
YYYYMMDD
ROY COOPER
Governor
DIONNE DELLI-GATT1
secretory
BRIAN WRENN
Director
May 25, 2021
Marine Corps Base Camp Lejeune
Attn: Neal Paul, Deputy Public Works Officer
1005 Michael Road
Camp Lejeune, NC 28547
NORTH CAROLINA
Envhonmenrat Qaattty
Subject: Permit Renewal
State Stormwater Management Permit No. SW8 110326
Pre -Trial Confinement Facility (P-1310)
Ouslow County
Dear Mr. Paul:
Effective August 1, 2013 the State Stormwater program has been transferred from the Division of Water Quality
(DWQ) to the Division of Energy, Mineral and Land Resources (DEMLR). All previous references to DWQ will
remain in older stormwater permits issued prior to August 1, 2013 until they are modified. Please note that this permit
will now reference DEMLR as the Division responsible for issuance of the permit.
The Wilmington Regional Office received a complete 8 year Stormwater Management Permit Renewal Application for
the subject project on May 17, 2021. The Division is hereby notifying you that permit SW8 110326 has been renewed
on May 25, 2021, and shall be effective until May 3, 2029. For your records, please find enclosed a renewed, updated,
and re -issued permit and a copy of the renewal application. Please keep this permit on file at all times. Please note that
the renewed, updated, and re -issued permit does not impose new or different terms; it merely restates some of the
previous terms to provide you with a better understanding of your obligations under the permit.
The renewal and reissuance of this stormwater permit does not imply that the site is currently in compliance with the
terms and conditions of this state stormwater permit. The plans originally approved on May 3, 2011 will remain in full
force and effect in accordance with the regulations set forth in Title 15A NCAC 2H.1000.
This permit is subject to the conditions and limitations as specified therein. Please pay special attention to the
conditions listed in this permit regarding the Operation and Maintenance of the BMP(s), recordation of deed
restrictions, procedures for changes of ownership, transferring the permit, and renewing the permit. Failure to establish
an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions,
to transfer the permit, or to renew the permit, will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an
adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written
petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed with the OAH within
thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a
filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or
via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit
shall be final and binding.
If you have any questions, need additional copies of the permit or approved plans, please contact Ashley Smith in the
Wilmington Regional Office, at (910) 796-7215 or ashleym.smith@ncdenr.gov.
Sincerely,
Cn_� Q
YO !4 X
.mow Brian Wrenn, Director
Division of Energy, Mineral and Land Resources
If ®rm Aft'- North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Wilmington Regional office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 2a405
wmv cwcuuru
910.796.7275
State Stormwater Permit No. SW8 110326
Page 2 of 2
Enclosures:
DES/ams:
cc:
Attachment C — Permitting History
Renewal Application Documents
\\\Stormwater\Permits & Projects\2011\I 10326 HD\2021 05 permit 110326
William Z. Shipman, PE
NCDEQ-DEMLR Wilmington Regional Office
Va QJli— North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources
Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 28405
910.796.7215
rvartv vaouru
State Stormwater Management Systems
Permit No. SW8 110326
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Marine Corps Base Camp Lejeune
Pre -Trial Confinement Facility (P-1310)
Duncan St & Sneads Ferry Rd, Camp Lejeune, Onslow County
FOR THE
construction, operation and maintenance of 2 bioretention basins in compliance with the provisions of
Session Law 2008-211 and 15A NCAC 2H .1000 (hereafter jointly and severally referred to as the
"stormwater rules") and the approved stormwater management plans and specifications and other
supporting data as attached and on file with and approved by the Division of Energy, Mineral and
Land Resources (the "Division" or "DEMLR") and considered an enforceable part of this permit.
This permit shall be effective from the date of issuance until May 3, 2029, and shall be subject to the
following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in
the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as
described in Section 1.6 of this permit. The stormwater controls have been designed to handle
the runoff from 98,970 and 20,716 square feet of impervious area, respectively.
3. The tract will be limited to the amount of built -upon area as indicated in Section 1.6 of this
permit, and per the application documents and the approved plans. The built -upon area for the
designated future development areas shown on the plans is limited to zero square feet.
4. The runoff from all built -upon area within the permitted drainage area of this project must be
directed into the permitted stormwater control system.
5. This permit does not allow for the subdivision and sale of any portion of the property, except
as noted herein. The subdivision of the property will require a permit modification prior to the
subdivision and sale of any lot from this project.
Page 1 of 5
State Stormwater Management Systems
Permit No. SW8 110326
6. The following design criteria have been met and provided in the bioretention basin and must
be maintained at design condition at all times:
a.
0
Drainage Area, acres:
Onsite, ft2:
Offsite, ft2:
Total Impervious Surfaces, ft2:
Onsite, ft2:
Offsite, ft2:
Design Storm, inches:
Max. Ponded Depth, feet:
TSS removal efficiency:
Seasonal High Water Table, fmsl:
Media Depth, feet:
Bottom Elevation, fmsl:
Permitted Storage Volume, ft3:
Temporary Storage Elevation, fmsl:
Surface Area at Sodded Elevation, ft2:
Drawdown Time, hours:
Type of cell:
Media depth, feet:
Underdrain Diameter, in:
Number of Clean Out Pipes Provided:
Receiving Stream/River Basin:
Stream Index Number:
Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
1
2.
Basin #1
Basin #2
238,404
51,244
238,404
51,244
0
0
98,970
20,716
98,970
20,716
0
0
1.5
1.5
1.0
1.0
85%
85%
21.0
23.5
2.0
2.0
24.0
26.0
17,020
3,868
27.0
29.0
14,920
3,213
8.59
16.93
Grass
Grass
2.0
2.0
2, 4"underdrains 2, 4"underdrains
25
5
UT to Cogdels Creek / White
Oak Basin
19-23
"SC; NSW'
The stormwater management system shall be constructed in its entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
During construction, erosion shall be kept to a minimum and any eroded areas of the system
will be repaired immediately.
Page 2 of 5
State Stormwater Management Systems
Permit No. SW8 110326
3. The permittee shall at all time provide the operation and maintenance necessary to assure the
permitted stormwater system functions at the design condition. The approved Operation and
Maintenance Plan must be followed in its entirety and maintenance must occur at the
scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and re -vegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch
basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon request to
authorized personnel of Division. The records will indicate the date, activity, name of person
performing the work and what actions were taken.
5. The facilities shall be constructed, operated and maintained in accordance with the provisions
of this permit, the approved plans and specifications, and the supporting documents attached
to this permit and on file with the Division.
6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to
operation of this permitted facility, a certification must be received from an appropriate
designer for the system installed certifying that the permitted facility has been installed in
accordance with this permit, the approved plans and specifications, and other supporting
documentation. Any deviations from the approved plans and specifications must be noted on
the Certification. A modification may be required for those deviations.
If the stormwater system BMP is used as an Erosion Control device during construction, more
frequent maintenance will be required during construction to maintain functionality. Once the
drainage area is stabilized and prior to occupancy of the facility, the BMP must be fully
restored to design condition.
8. Access to the stormwater facilities shall be maintained via appropriate recorded easements at
all times.
All stormwater collection and treatment systems must be located in public rights -of -way,
dedicated common areas or recorded easements. The final plats for the project will be
recorded showing all such required rights -of -way, common areas and easements, in
accordance with the approved plans.
Page 3 of 5
State Stormwater Management Systems
Permit No. SW8 110326
10. No person or entity, including the permittee, shall alter any component shown in the approved
plans and specifications. Prior to the construction of any modification to the approved plans,
the permittee shall submit to the Director, and shall have received approval for modified plans,
specifications, and calculations including, but not limited to, those listed below. For changes to
the project or SCM that impact the certifications, a new or updated certification(s), as
applicable, will be required and a copy must be submitted to the appropriate DEQ regional
office upon completion of the modification.
a. Any modification to the approved plans and specifications, regardless of size including
the SCM(s), BUA, details, etc.
b. Redesign or addition to the approved amount of BUA or to the drainage area.
C. Further development, subdivision, acquisition, lease or sale of any, all or part of the
project and/or property area as reported in the approved plans and specifications.
d. Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any
component of the approved SCM(s), the stormwater collection system and/or
vegetative conveyance shown on the approved plan.
e. The construction of any allocated future BUA.
f. The construction of any permeable pavement, #57 stone area, public trails, or
landscaping material to be considered a permeable surface that were not included in
the approved plans and specifications.
g. Other modifications as determined by the Director.
11. Prior to transfer of the permit, a file review and site inspection will be conducted by Division
personnel to ensure the permit conditions have been met and that the project and the on -site
stormwater system complies with the permit conditions. Any items not in compliance must be
repaired, replaced restored, or resolved prior to the transfer. Records of maintenance activities
performed to date may be requested.
12. The Director may notify the permittee when the permitted site does not meet one or more of
the minimum requirements of the permit. Within the time frame specified in the notice, the
permittee shall submit a written time schedule to the Director for modifying the site to meet
minimum requirements. The permittee shall provide copies of revised plans and certification in
writing to the Director that the changes have been made.
III. GENERAL CONDITIONS
Any individual or entity found to be in noncompliance with the provisions of a stormwater
management permit or the requirements of the stormwater rules is subject to enforcement
procedures as set forth in NCGS 143 Article 21.
The issuance of this permit does not preclude the permittee from complying with and obtaining
any other permits or approvals that are required for this development to take place, as
required by any statutes, rules, regulations, or ordinances, which may be imposed by any
other Local, State or Federal government agency having jurisdiction. Any activities undertaken
at this site that cause a water quality violation or undertaken prior to receipt of the necessary
permits or approvals to do so are considered violations of NCGS 143-215,1, and subject to
enforcement procedures pursuant to NCGS 143-215.6.
3. If the facilities fail to perform satisfactorily, the permittee shall take immediate corrective
actions. This includes actions required by this Division and the stormwater rules such as the
construction of additional or replacement on -site stormwater systems. These additional or
replacement measures shall receive a permit from the Division prior to construction.
Permit Transfer: This permit is not transferable to any person or entity except after notice to
and approval by the Director. The permittee shall submit a completed and signed "Permit
Transfer Application Form" (available on the Division website) accompanied by the required
fee and supporting documentation as listed on the form, to the Division at least 60 days prior
to any one or more of the following events:
a. The sale or conveyance of the project area in whole or in part, except in the case of an
individual lot sale that is made subject to the recorded deed restrictions and protective
covenants;
b. Dissolution of the partnership, corporate, or LLC entity, subject to NCGS 55-14-05 or
NCGS 57D-6-07 and 08;
C. Bankruptcy,
d. Foreclosure, subject to the requirements of Session Law 2013-121;
Page 4 of 5
State Stormwater Management Systems
Permit No. SW8 110326
5. Current Permittee Name or Address Changes: The permittee shall submit a completed
"Permit Information Update Application Form" (available on the Division website) to the
Division within 30 days to making any one or more of the following changes:
a. A name change of the current permittee;
b. A name change of the project,
C. A mailing address change of the permittee;
6. The permittee is responsible for compliance with all terms and conditions of this permit until
the Division approves the transfer request. Neither the sale of the project, in whole or in part,
nor the conveyance of common area to a third party constitutes an approved transfer of the
permit.
7. The permittee grants Division Staff permission to enter the property during normal business
hours to inspect all components of the permitted project.
8. The permit issued shall continue in force and effect until the permittee files a request with the
Division for a permit modification, transfer, renewal, or rescission; however, these actions do
not stay any permit conditions.
9. Approved plans, application documents, supplements, calculations, operation and
maintenance agreement, and specifications for this project are incorporated by reference and
are enforceable parts of the permit. A copy of this permit, application, supplements, operation
and maintenance agreement, and approved plans and specifications shall be maintained on
file by the permittee.
10. Unless specified elsewhere, permanent seeding requirements for the on -site stormwater
system must follow the guidelines established in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
11. 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 for cause as allowed by the
laws, rules, and regulations contained in Title 15A NCAC 2H.1000 and NCGS 143-215.1 et.al.
12. A permit renewal request must be submitted at least 180 days prior to the expiration date of
this permit. The renewal request must include the appropriate application, documentation and
the processing fee as outlined in Title 15A NCAC 02H.1045(3).
Permit renewed, updated and reissued this the 25 day of May 2021.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
CR.pP
BnanW re�nn,Uirect r
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 5 of 5
Attachment C - Permitting History
Pre Trial Confinement Facility P 1310
Permit No. SW8 110326
Approval
Date
Permit
Action
BIMS
Version
Description of the Changes
5/3/201 1
Original
Approval
1.0
5/25/2021
Renewal
2.0
DEMLH USF UNLY
Date ecei ed
Fee Paid
Permit Number
I . (
I Eteciroroc, ryrnt. p�a
NC DEQ Division of Energy, Mineral and Land Resources ECE t V E ``
fi
STATE STORMWATER: MAY 1 in '" )
PERMIT RENEWAL APPLICATION FORMt
In accordance with 15A NCAC 2H.1045(3), the current permit holder shall renew their high density permit 180 days
prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781)
Section 60.(c). This application form is for permit renewals only.
A. PROJECT INFORMATION
1. State Stormwater Permit Number: SW8 110326
2. Project name: Pre -Trail Confinement Facility (P-1310) High Density Commercial Bio-Retention Project
3. Project street address: XXX
City: MCB Camp Leieune County: Onslow
ZIP: 28542
4. What, if any, changes have been made to the project as permitted? N/A
If the project has changed from the original approved plans, please complete SWU-101 fora Major
Modification or Minor Modification Application form available at: https:Hdeg.nc.gov/about/divisions/energv-
mine ral-land-resou rces/ene rqv-m i neral-land-rules/stormwater-prog ram/post-construction.
B. PERMITTEE INFORMATION
If changes to the permittee or project name have been made, please complete either the Permit Update form
or the Permit Transfer form available at: https://deg.nc.gov/about/divisions/energy-mineral-land-
resources/energy-mineral-land- rules/stormwater-program/post-construction. State Stormwater Permits do not
automatically transfer with the sale of the property.
1. Current Permit Holder's Company Name/Organization: MCB Camp Leieune
2. Signing Official's Name: Neal Paul
3. Signing Official's Title: Deputy Public Works Division
4. Mailing Address: MCB Camp L,ejeune 1005 Michael Rd.
City: MCB Camp Leieune State: NC
ZIP: 28547-2521
5. Street Address:
City: State:
6. Phone: (910) 451-2213 Email: neal.paul@usmc.mil
ZIP :
MAY 17 2021
Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018
C. SUBMITTAL REQUIREMENTS
Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR
Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that
include all required items listed below will be accepted and reviewed.
Initial each item below to indicate that the required information is provided in the application package:
HEB 1. A permit application processing fee of $505.00 payable to NCDEQ.
HEB 2. One original signed hard copy and one electronic copy of this completed form. The signing official
named on this application to represent the current permittee must meet one of the following:
a. Corporation — a principle executive officer of at least the level of vice-president;
b. Limited Liability Company (LLC) — a manager or company official as those terms are defined
in G.S. 57D "North Carolina Limited Liability Company Act;"
c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee;
d. Partnership or limited partnership — the general partner;
e. Sole proprietor; or
I. Letter of authorization signed by one of the signatories noted in a — e above authorizing the
signature of another entity.
HEB 3. One hard copy and one electronic copy of recorded documents required by the original permit that have
not yet been received by DEMLR, including: deed restrictions, protective covenants,
condominium/planned community declaration and easements. If the project has been built, include
documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If
the project has not been built, include a signed agreement that the final recorded deed restrictions
and protective covenants will be submitted at a later date.
HEB 4. O&M Agreements, Please select one:
® 1 have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to
keep this on file with the permit; or
❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am
requesting a copy be sent to me. I agree to keep this on file with the permit.
HEB 5. Designer Certifications, Please select one:
❑ A copy of the certification(s) confirming that the project was built in accordance with the
approved plans have been previously provided to the Division; or
® A copy of the certification(s) confirming that the project was built in accordance with the
approved plans are enclosed; or
❑ The project has not yet been built.
6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a
signed, sealed, and dated letter from a licensed professional stating that the SCMs have been
inspected, and that they have been built and maintained in accordance with the permit.
7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC):
Provide one hard copy and one electronic copy of documentation from the NC Secretary of State,
or other official documentation, which supports the titles and positions held by the persons listed in
Section C.2 per 15A NCAC 2H. 1043(3)(b).
https://www.sosnc._qov/online services/search/by title/ Business Registration
o ate.
MAY 17 202,
Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018
D. PERMITTEE'S N
1LERT FICATIIOI
I, DN�� A. /,.Xw le the person legally responsible for the permit, certify that I have
a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am
responsible for the performance of the maintenance procedures, and the site has been and will be maintained
according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs
or built -upon area and to sub mi proper forms to modify or transfer the permit prior to any changes to the
project, SCM r ownership II in rmation provided on this permit renewal application is, to the best of my
knowledge, o e and cc plete.
Signature: / Date: 21
L)
NOTARIZATION:
1, I UV5an a Notary Public for the State of
N,YA�t ,County of Cnt2lzi / ,dohereby certify
that J2s jLA LbvsdLr personally appeared before me
this the T day of ry) 1 20�, and acknowledge the due
execution of the forgoing instrument. Witness my hand and official seal,
(Notary Seal)
\V ERSO�'
(V,'NOTARY ,
Notary Signature:
c , ' PUBL_;
My commission expires t� JT �� %� '%�l�S� •. ���
',/,low COJ� �.
Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018
Permit Number:
(to be provided by DWQ)
Drainage Area Number: I
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.
D
Stone verge is clogged or
Remove sediment and clogged
IVLi
Cri'
covered in sediment (if
stone and replace with clean stone.
\\
applicable .
MAR 2011
B 1'
Form S W401-Bioretention O&M-Rev.3
Page 1 of 4
BMP element:
Potentialproblems:
How 1 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
ossible.
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.
4
Form SW401-Bioretention O&M-Rev3 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.i
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:Pre-Trial Confinement Facility (P-1310)
BMP drainage area
Print name: Carl Pq�e✓
Title: WbeCeil
Address: 1005' 0;c.letacl F—A.I GnvwD Lej<0. 0- 1-kC 286-q
Date: —( 1
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.
*iI, � ( i OL— No r r s a Notary Public for the State of
IVO(rl' C0-�(-0 1 �1(L, County of Q r) -3(,ov i do hereby certify that iiN
�t oL I Y)CAQ'(— personally appeared before me this J l—
day ofa- 01( , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SYLVIA NORRIS
NOTARY PUBLIC
ONSLOW COUNTY,
MY COMMISSION EXPIRES t 3 ca
SEAL
My commission expires
Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4
Permit Number:
(to be provided by DWQ)
Drainage Area Number: 7—
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 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 sedime f
stone and replace with clean stone.
a licab �—
MAR 2 4 PZ F:C;ETVED
� MAR 0 4 2011
gY�
Form SW401-Bioretention O&M-Rev.3 Ire Y Page 1 of 4
BMP element:
Potentialproblems:
How 1 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 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:
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
Re air 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.
t,
11V�_dt:•i �
4 2011
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:Pre-Trial Confinement Facility (P-1310)
BMP drainage area number:$ y
Print name: Ca+r l &+
Date: '-� —I ?,—I f
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I,,SVI VV I G. 1 o (f 15 a Notary Public for the State of
KO(-tCCa
�. nnO\ (' V) . County of n h SI O W , do hereby certify that U
0-0.0 1� U(1\l�e (^ personally appeared before me this
day of'� eand acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SYLVIA NORRIS
NOTARY PUBLIC
ONSLOW COUNTY,
MY COMMISSION EXPIRES
SEAL
My commission expires M,.L J' -( 4ZO/s
Form SW401-Bioretention 1&M-Rev. 2 Page 4 of 4
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the
infiltration basin.
— Immediately after the infiltration basin is established, the vegetation will be
watered twice weekly if needed until the plants become established (commonly
six weeks).
— No portion of the infiltration basin will be fertilized after the initial fertilization
that is required to establish the vegetation.
— The vegetation in and around the basin will be maintained at a height of
approximately six inches.
After the infiltration basin is established, it will be inspected once a quarter and within
24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
infiltration basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe or
The pipe is clogged (if
Unclog the pipe. Dispose of the
swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
� �.�1~:�:l���vl✓�
I MAR 0 4 2011
Form SW401-Infiltration Basin O&M-Rev.3 � l` X. ___ P ige 1 of 3
i : .
BMP element:
Potentialproblem:
How I will remediate theproblem:
The forebay
Sediment has accumulated
Search for the source of the
and reduced the depth to 75%
sediment and remedy the problem if
of the original design depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred or
Provide additional erosion
riprap is displaced.
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticides are used, wipe
them on the plants rather than
spraying.
The main treatment area
A visible layer of sediment
Search for the source of the
has accumulated.
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP. Replace any media that
was removed in the process.
Revegetate disturbed areas
immediately.
Water is standing more than
Replace the top few inches of filter
5 days after a storm event.
media and see if this corrects the
standing water problem. If so,
revegetate immediately. If not,
consult an appropriate professional
for a more extensive repair.
Weeds and noxious plants are
Remove the plants by hand or by
growing in the main
wiping them with pesticide (do not
treatment area.
spray).
The embankment
Shrubs or trees have started
Remove shrubs or trees
to grow on the embankment.
immediately.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-infiltration Basin O&M-Rev.3 Page 2 of 3
Permit
(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:Pre-Trial Confinement Facility (P-1310)
BMP drainage area number:
Print name: C
t
Address: {� Ids 10015— H,, haf I K el; COM42 Le j,011P 1,1 C.- 2,851
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, &J1 V (Cx- tt) i f'f S 1 , a Notary Public for the State of
�r((�y#1 CWnA 1 ntu , County of U n 40 w do hereby certify that
l�Glf 1 I�UK2 C' personally appeared before me this
day of 'fN ,9_0(1 > and acknowledge the due execution of the
forgoing infiltration basin maintenance requirements.
Witness my hand and official seal,
SYLVIA NORRIS
NOTARY PUBLIC
ONSLOW COUNTY,
MY COMMISSION EXPIRES '
SEAL
My commission expires <.2 0L15
MAR 0 4 2011
Form SW40 I -Infiltration Basin O&M-Rev.3
Page 3 of 3
Permit No.
(to be nmvided by DWQ)
N" �ws o� FwnfphO`
kTXA > � 9
STORMWATER MANAGEMENT PERMIT APPLICATION FORM ION
MCDENR 401 CERTIFICATION APPLICATION FORM < -
INFILTRATION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 1/1) must be printed, filled out and submitted along with all of the required information.
Contact Person
Zak Shipman, PE
Phone Number
(919) 8664937
Date
1/1412011
Drainage Area Number
1
Site Characteristics
Drainage area
60,315.00
f"
Impervious area
37,486.00
ft2
Percent impervious
0.62
%
Design rainfall depth
1,00
in
Peak Flow Calculations
1-yr, 24-hr rainfall depth
3,70
in
1-yr, 24-hr intensity
in/hr
Pre -development 1-yr, 24-hr discharge
0.00
ft'Isec
Post -development 1-yr, 24-hr discharge
0.00
ft'Isec
Pre/Post 1-yr, 24-hr peak Flow control
0.00
ft'Isec
Storage Volume: Non -SA Waters
,Animum design volume required
3,050.00
ft'
Design volume provided
15,131.00
ft'
OrC no.) -EA ware,z
Storage Volume: SA Waters
1.5' runoff volume
h'
Pre -development 1-yr, 24-hr runoff volume
ft'
Post -development 1-yr, 24-hr runoff volume
ft'
Minimum required volume
ft'
Volume provided
ff
Soils Report Summary
Sail type
Sand (SM)
Infiltration rate
1.25
in/hr
SHWT elevation
24.80
final
Basin Design Parameters
Drawdown time
0.25
days
Ok
Basin side slopes
3.00
:1
Or
Basin bottom elevation
27.00
fmsl
GY
Storage elevation
29.00
fmsl
Storage Surface Area
9,159.00
it
fmsl
+,'V�i�
Top elevation
29.50
Basin Bottom Dimensions
7.MAR
0 4 2011Basin
Basin length
230.00
ft
width
26.00
it
Bottom Surface Area
6,029.00
ft2Y
--
Form SW401-Infiltration Basin-Rev.4 Parts I. & it. Design Summary, Page 1 or 2
Permit No.
(to be provided by DWO)
Additional Information
Maximum runoff to each inlet to the basin?
NIA
ac-in
Length of vegetative filter for overflow
N/A
fit
Distance to structure
N/A
it
Distance from surface waters
250.00
ft
Distance from water supply well(s)
N/A
ft
Separation from impervious soil layer
N/A
ft
Naturally occuring soil above shwt
1.87
It
Bottom covered with 4-in of clean sand?
Y
(Y or N)
Proposed drainage easement provided?
N/A
(Y or N)
Capures all runoff at ultimate build -out?
Y
(Y or N)
Bypass provided for larger storms?
N/A
(Y or N)
Pretreatment device provided
N/A
Maximum of 2 acre.inches allowed
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Form SW401-Infiltration Basin-Rev.4 Parts I. & II. Design Summary, Page 2 of 2
Permit Number:
(to be provided by DWQ)
OF NAr�
O;� O
bLua,
p NC=- <
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 Ill) must be printed, filled out and submitted along with all of the required information.
Project name
Contact name
Phone number
Date
Drainage area number
Site Characteristic:
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-yi, 24-hi intensity
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yi, 24-hr peak control
Storage Volume: Non•SA Waters
Minimum volume required
Volume provided
StorageVolume: 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
Fording depth of water
Funding 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-eiorelention-Rev.e
June 25, 2010
Pre -Trial
PE
193,326 ft2
61,282 ft2
31.7% %
1.0 inch
Y (Y or N)
3.7 in
in/hi
0.000 ft'tsec
0.000 h'/sec
0.000 ff'/sec
5,400.0 fl'
17,020.0It' OK
0 ft'
0 ft'
o It'
0 ff
0 ff'
OK
12 inches OK
1.00 ft
24,223.0 ft2 OK
it
it
It
4,52 hr OK
8.59 hr OK
13.11 hr
0.32 in/hr Insufficient Increase infiltration rate or include undo
�F4';�r�YV1C
2.00 in/hr OK
85% OK MAR 0 4 2011
12% OK
3% OK '---- - --
Total: 100%
20 (unitless) OK
Parts 1 and 0. Design Summary, Page 1 of 2
Permit Number. r '\ b
(to be provided by D WQ)
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 filter?
What is the length of the vegetated filter?
Does the design use a level spreader to evenly distribute flow?
is the BMP located at least 30 feel 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)
27.00 fmsl
Y (Y or N) OK
N (Y or N)
26 fmsl
2 inches OK
24 fmsl
2h
0.33 it
� m►ll
25 OK
10 OK
lit
22.67 fmsl
20 fmsl
2.67 it OK
N (Y or N)
fmsl
26 it
0
0
0 Recommend more species.
N (Y or N) Excess volume must bypass cell.
N/A (Y or N) Enter Dale
it
N (Y or N) Show how Flow is evenly distributed.
Y (Y or N) OK
N/A (Y or N) Enter Data
y (Y or N) OK
N/A (Y or N) Insufficient ROW location.
11/sec
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
(8 inches gravel followed by 3-5 It of grass)
Grassed swale
Forebay
Other
X OK
Form SW401-Bioretention-Rev.8
June 25. 2010 Parts 1 and If. Design Summary, Page 2 of 2
.i
r , Pertnn No:
(to be assigned by DWQ)
Ill. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional Information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
L' • o 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
- Biorelention cell layers (ground level and slope, pre-treatment, pending depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone d applicable), #57 stone, underdrains (if applicable),
SHWT level(s), and overflow structure)
/!
4. A sails 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 DWO, 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 I% sand, % fines. % organic), and
P-index.
5. A detailed planting plan (I' = 20' or larger) prepared by a qualified individual showing:
- 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.
6. A construction sequence that shows how the hioretention cell will be protected from sediment until the
` entire drainage area is stabilized.
r
a,, :.- _ 7. The supporting calculations (including underdrain calculations, if applicable).
8. A copy of the signed and notarized inspection and maintenance (1&M) agreement.
t1.2 •'.. 9. A copy of the deed restriction.
Forrn SW 401-Sioretenfion-Rev.7 Part III, Page 1 of 1,
Permil
®MA
NCDENR
Ito be provided by D WQ)
�F INA rt
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 (Pad Ill) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name Pre -Trial Confinement Facility (P-1310)
Contact name Zak Shipman, PE
Phone number (919) 86GA937
Date January 14, 2011
Drainage area number 3
II. DESIGN INFORMATION
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, 24hr peal; 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, 24hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Cell Dimensions
Forcing 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
Planling media soil:
Soil permeability
Soil composition
• Sand (by volume)
% Fines (by volume)
• Organic (by volume)
Phosphorus Index (P-Index) of media
Form S W 401-eioretention-Rev.8
June 25. 2010
51,244 ft'
20,672 Rr
40.3% %
1.0 inch
Y (Y or N)
3.7 in
in/hr
0.000 ft'/sec
0.000 ft'/sec
0.000 ft'/sec
1,765.0 ft'
3,819.0 ft' OK
0 ff'
0 ft'
0 ft'
o ft'
o fl'
OK
12 inches OK
1.00 it
4,460.0 ft1 OK
It
it
I
8.06 hr
OK
15.32 hr
OK
23.38 hr
0.10 in/hr
Insufficient.
Increase infiltration rate or include underdrains,
i ` _�'.� �%
2.00 in/hr
OK
�. • - r�'
85%
OK
MAR 0 4 2011
12%
OK
3%
OK
Total: 100%
�—'--
20 (unitless)
OK
Parts I and II. Design Summary, Page 1 of 2
Permit Number. 1'1% >
(to 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 lop 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 filter?
What is the length of the vegetated filter?
Does the design use a level spreader to evenly distribute Flow?
Is the BMP located at least 30 feet from surface waters (50 feet if
SA waters)?
Is the BMP located at least 100 feel 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
(8 inches gravel followed by 3-5 it of grass)
Grassed swale
Forebay
Other
29.00 fmsl
Y (Y or N)
N (Y or N)
28 fmsl
2 inches
26 fmsl
24
0.33 ft
OK
OK
Y (Y or N)
5 OK
10 OK
1 It
24.67 fmsl
22.5 fmsl
2.17 it OK
N (Y or N)
Intel
28 ft
0
0
0 Recommend more species.
N (Y or N) Excess volume must bypass cell.
N/A (Y or N) Enter Dal@
fl
N (Y or N) Show how now is evenly distributed,
Y (Y or N) OK
N/A (Y or N) Enter Data
Y (Yor N) OK
N/A (Y or N) Insufficient ROW location.
ft/sec
N (Y or N) OK
N (YorN) OK
Y (Y or N) OK
X OK
Form SW401-Bioretention-Rev.8
June 25, 2010
Parts I and 11. Design Summary, Page 2 of 2
Peril No:
(to be assigned by D WQ)
III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An Incomplete submittal package
will result in a request for additional Information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met, If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
1. Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- 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
7
3. Section view of the biorelention cell (1" = 20' of larger) showing.
- Side slopes, 3:1 or lower
- Underdrain system (if applicable), and
- Bioretention cell layers (ground level and slope, pre-treatment, pone ing 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 DWO, 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 (rmst). Results of soils tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
- Soil composition (% sand, % fines, %, organic), and
P-index.
5, A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing:
- 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.
6. A construction sequence that shows how the bioretenlion cell will be protected from sediment until the
'
entire drainage area is stabilized. ,
-:0_11
7. The supporting calculations (including underdrain calculations, if applicable).
n
B. 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
Part III, Page 1 or 1
- Permit Number:
(to be provided by DWO)
���
02 4 WATfgoL
y
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.
rrolecl name
rue-i nal uomm
Contact name
Zak Shipman, F
Phone number
( 119) 866A937
Date
April 18, 2011
Drainage area number
1
II. DESIGN INFORMATION
Site Characteristics
Drainage area
238,404 ft'
Impervious area
98,970 ftz
Percent impervious
41.5% %
Design rainfall depth
1.5 inch
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-SAWaters
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
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)
Phosphorus Index (P-Index) of media
Form SW401-Biorelenlion-Rev.8
June 25, 2010
N (Y or N)
3.7 in
in/hr
0.000 ft'/sec
0.000 ft'/sec
0.000 ft'/sec
12,616.0 ft'
17,020.0 ft'
0 ft'
0 ft'
0 ft'
0 ft'
0 ft'
12 inches
1.00 ft
14,920.0 ftZ
ft
ft
ft
4.52 hr
8.59 fir
13.11 fir
0.32 m/hr
2.00 in/hr
OK
OK
OK
OK
OK
)"1I9,, eor IS 5WLFh c-/{"kT pv,,_mjt ; c4E1s7jokt.
Insufficient. Increase infiltration rate or include underdrains.
OK
85% OK
12% OK
3% OK
Total: 100%
20 (unitless) OK
APR 2 1 2011
Parts I and II. Design Summary, Page 1 of 2
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 safely 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 lop 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 Now evenly distributed
through a vegetated filter?
What is the length of the vegetated filter?
Does the design use a level spreader to evenly distribute flow?
Is the BMP located at least 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
(8inches gravel followed by 3-5 It of grass)
Grassed Swale
Forebay
Other
Permit Number:
(to be provided by E WQJ
21.00 IS-Nc Et ralpmua AT -Tpr� TT I VLI COL. Jcvr. Na--
27.00 fmsl ^1'E� 6-.-a_-TY 10u me To CL.
Y (Y or N) OK
N (Y or N)
26 fmsl
0 inches Insufficient mulch depth, unless installing grassed cell.
24 fmsl
2 It
0.33 ft
Y (Y or N)
25 OK
10 OK
1 It ACLAX 4.-rtp,-r,. = Et_. V+ 7 zl To SH`ar
22.67 fmsl
21 fmsl
1.67ft Insufficient distance to SHWT.
N (YorN)
fmsl
26 ft
0
0
0 Recommend more species.
N (Y or N) Excess volume must bypass cell.
N (Y or N) Excess volume must pass through filter.
It
N (Y or N) Show how flow is evenly distributed.
Y
(Y or N)
OK
Y
(Y or N)
OK
Y
(Y or N)
OK
N
(Y or N)
Insufficient ROW location.
ft/sec
N
(Y or N)
OK
N
(Y or N)
OK
Y
(Y or N)
OK
X OK APR 21 2011
Form SW401-Bioretenlion-Rev.8
June 25, 2010
Parts I and It. Design Summary, Page 2 of 2
Permit No:
(to be assigned by DWO)
III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
c.— 16 5 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.
�` C—ea-1 2. Plan details If" = 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 bioretenlion 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)
A 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,
L _ 100 - Soil composition (% sand, % fines, % organic), and
-index.
� d
5. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing:
- A variety of suitable species, 7PA�e
- Sizes, spacing and locations of plantings,- Total quantity of each type of plant specified,�f-Aplantingdetail, R 21 2011
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation. B
6. A construction sequence that shows how the bioretention cell will be protected from sediment until'
v_ entire drainage area is stabilized.
l7 7. The supporting calculations (including underdrain calculations, if applicable).
LL— 8. A copy of the signed and notarized inspection and maintenance (AM) agreement.
T _4N_ 9. A copy of the deed restriction.
Fonn SW401-13ioretendon-Rev.7 Part III, Page 1 of 1
Permit
(to be provided by D WQ)
m2OF WATPgOr
NCDENR C
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.
I. PROJECT INFORMATION
Project name
Pre -Trial Confinement Facility (P-1310)
Contact name
Zak Shipman, PE
Phone number
(919) 8664937
Date
April 19, 2011
Drainage area number
2
II.: DESIGN INFORMATION
Site Characteristics
Drainage area
51,244 ft'
Impervious area
20,716 ft2
Percent impervious
40.4% %
Design rainfall depth
1.5 inch
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
N (Y or N)
1-yr, 24-hr runoff depth
3.7 in
1-yr, 24-hr intensity
in/hr
Pre -development 1-yr, 24-hr peak flow
0.000 ft'/sec
Post -development 1-yr, 24-hr peak flow
0.000 ft'/sec
Pre/Post 1-yr, 24-hr peak control
0.000 ft'/sec
Storage Volume: Non -SA Waters
Minimum volume required
2,649.0 ft'
Volume provided
3,868.0 It' OK
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
Ponding depth of water
Forcing 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)
oW
0W
0 fh
0 ftr
0 W
OK
12 inches OK
10f1 g^13Sr IS S,,aA CC- At CA " RgNTINC�
3,213.00
,213.3.0 ftZ OK t
ffYATIou
ft
ft
9.67 hr OK
16.93 hr OK
26.6 hr
0.10 in/hr Insufficient. Increase infiltration rate or include underdrains.
2.00 in/hr OK
85% OK
12% OK
3% OK
Total: 100%
APR 2 1 2011
Phosphorus Index (P-Index) of media
Form SW401-Bioretention-Rev.8
June 25, 2010
20 (unitless) OK
Parts I and II. Design Summary, Page 1 of 2
J
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
Permit Number:
(m be provided by DWD)
G`f•o0 IS EtLJwT oa OF-r.F fASeE.S74c,tTMt '
29.00 fmsl WC-MO1-YdbT62 DU--TY ySL,, < ST7�ES Tp
lii�l-, 'LB. ba
Y (Y or N)
N (Y or N)
28 fmsl
0 inches
26 fmsl
2 it
n11rf
Are underdrains being installed?
Y
(Y or N)
How many clean out pipes are being installed?
5
What factor of safety is used for sizing the underdrains? (See
10
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
24.67 fmsl
SHWT elevation
23.5 first
Distance from bottom to SHWT
1.17 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
28 ft
Planting Plan
Number of tree species
0
Number of shrub species
0
Number of herbaceous groundcover species
0
Additional Information
Does volume in excess of the design volume bypass the
N
(Y or N)
bioretention cell?
Does volume in excess of the design volume flow evenly distributed
N
(Y or N)
through a vegetated filter?
What is the length of the vegetated filter?
It
Does the design use a level spreader to evenly distribute flow?
N
(Y or N)
Is the BMP located at least 30 feet from surface waters (50 feel 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
N
(Y or N)
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
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 bioretenlion cell greater than 20%?
N
(Y or N)
Is the drainage area permanently stabilized?
Y
(Y or N)
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
X
Forebay
Other
OK
Insufficient mulch depth, unless installing grassed cell.
OK
Na
6.+ .� 6T MG-b14 = e-2- � 21 -r,,> SI�b.JT�
Insufficient distance to SHWT.
Recommend more species.
Excess volume must bypass cell.
Excess volume must pass through filter
Show how Flow is evenly distributed
OK
OK,
OK
Insufficient ROW location.
OK
OK
OK
OK
APR 21 2011
Form SW401-Bioretention-Rev.8
June 25, 2010
Parts I and IL Design Summary, Page 2 of 2
Permit No:
(to be assigned by DWO)
III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided
to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials
Sheet No.
1. Plans (1' - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- 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.
C-_J5"g
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.
c-0
- 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),
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 DWO, 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 (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
L"1O"
-P-index.
5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing:
- 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.
QaL 'i
6. A construction sequence that shows how the bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
7. The if R.F��. �i' IVED
^~�
�
supporting calculations (including underdrain calculations, applicable).
8. A copy of the signed and notarized inspection and maintenance (I&M) agreement. APR 21 Nil
9. A copy of the deed restriction
Form SW401-Bioretention-Rev.7 Part III, Page 1 of 1
State Stormwater Management Systems
Permit No. SW8 110326
Pre -Trial Confinement Facility (P-1310)
Stormwater Permit No. SW8 110326
Onslow Countv
Designer's Certification
I, as a duly registered 1714ch in the
State of North Carolina, having been authorized to observe penodicall weekly/
full time) the construction of the project,
(Project Name)
for Mno . <C � CA. tkl6wdt- (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 (/VA/v(�•��-
Registration Number _)1r>os:?
Date IIII`1I?,
-
Page 7 of 8
,�i H I CgRO
OFESS/p��y��
4� SEAL GINOy:9
Q -
Z 8N�0P?\\\`
RAY
State Stormwater Management Systems
Permit No. SW8 110326
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.
�,Y 4. All roof drains are located such that the runoff is directed into the system.
iljf%if>`, 5. The outlet/bypass structure elevations are per the approved plan.
4)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 and located per the
approved plans.
I-A<113. All required design depths are provided.
14. All required parts of the system are provided, such as plantings, a forebay
filter media and a vegetated filter.
17-
& 15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Inspector, Onslow County Building Inspections
MAY 172021
Page 8 of 8