SW8080937_CURRENT PERMIT_20220715

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 0 % Oal 3'1
DOC TYPE
® CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2 0 22 01 15
YYYYMMDD

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
BRIAN WRENN
Director
July 15'", 2022
NORTH CAROLINA
£nvtronmer ral Quality
Thomas Concrete of South Carolina, Inc.
Attn: Jim Ryder, Vice -President / General Manager
124 Moats Fowler Road
Anderson, SC 29626
Subject: Permit Renewal
Post -Construction Stormwater Management Permit No. SW8 080937
Benton Rentals, LLC
Brunswick County
Dear Mr. Ryder:
The Division of Energy, Mineral and Land Resources received a complete 8-year Permit Renewal Application for
the subject permit on July 15th, 2022. The Division is hereby notifying you that permit SW8 080937 has been
renewed, updated, and re -issued on July 15', 2022, as attached. Please be aware that the renewal and re -issuance
of this stonmwater permit does not imply that the site is currently in compliance.
This permit shall be effective until December 30", 2029 and does not supersede any other agency permit that
may be required. The project shall be subject to the conditions and limitations as specified therein. This permit
does not impose new or increased stormwater control requirements; it clarifies the rules and requirements of this
program to provide you with a better understanding of your obligations under this permit. Failure to comply with
these requirements will result in future compliance problems. Please note that this permit is not transferable
except after notice to and approval by the Division.
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.
This project will be kept on file at the Wilmington Regional Office. If you have any questions concerning this
permit, please contact Dylan McPeake in the Wilmington Regional Office, at [phone] or
[e-mail].
Sincerely,
AZ Brian Wrenn, tree or
Division of Energy, Mineral and Land Resources
Enclosures: Attachment C — Permitting History
Renewal Application Documents
DES/DM: \\\Stormwater\Permits & Projects\2008\080937 HD\2022 07 permit 080937
cc: Wilmington Regional Office Stormwater File
10"K E QJM 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

Post -Construction Stormwater Management
Permit No. SW8 080937
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
POST -CONSTRUCTION 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
Thomas Concrete of South Carolina, Inc.
Benton Rentals, LLC
197 Barnhill Road NW, Brunswick County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with the
provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and as
outlined in the application, approved stormwater management plans, supplement, calculations,
operation and maintenance agreement, recorded documents, specifications, and other
supporting data (the "approved plans and specifications") as attached and/or on file with and
approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR").
The project shall be constructed, operated and maintained in accordance with these approved
plans and specifications. The approved plans and specifications are incorporated by reference
and are enforceable part of this permit.
This permit shall be effective from the date of issuance until December 30t", 2029 and shall be
subject to the following specified conditions and limitations. 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 condition. 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.
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
This stormwater system has been approved for the management of stormwater runoff as
described in Section 1.6 on page 3 of this permit. The stormwater control has been
designed to handle the runoff from 148,700 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans.
Page 1 of 6

Post -Construction Stormwater Management
Permit No. SW8 080937
7
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.
The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system.
CORRECTIONS NEEDED and SCHEDULE OF COMPLAINCE. To bring this project
into compliance with the Stormwater Regulations and design criteria, these deviations
will be corrected within the proposed schedule of compliance as documented in
Attachment D. The schedule must be adhered to unless an extension or revised plan of
action is submitted and approved by the Division.
The following design criteria have been provided in the wet detention pond and must be
maintained at design condition:
a. Drainage Area, acres:
Onsite, ft2:
Offsite, ft':
b. Total Impervious Surfaces, ft':
C. Design Storm, inches:
d. Pond Depth, feet:
e. TSS removal efficiency:
f. Permanent Pool Elevation, FMSL:
g. Permanent Pool Surface Area, ft':
h. Permitted Storage Volume, ft':
i. Temporary Storage Elevation, FMSL:
j. Controlling Orifice:
k. Permitted Forebay Volume, ft':
I. Fountain Horsepower, HP
M. Receiving Stream/River Basin:
n. Stream Index Number:
o. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
5.90
257,000
None
148,700
1.5
7ft (4ft avg)
90
41
13,322
19,236
42.2
2.5"0 pipe
8,965
1/6
UT to Williams Branch / Lumber
15-25-2-9-3
"C;Sw,HQW'
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.
The permittee shall at all times 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.
Page 2 of 6

Post -Construction Stormwater Management
Permit No. SW8 080937
4. Records of maintenance activities must be kept and made available upon request to
authorized personnel of DEMLR. The records will indicate the date, activity, name of
person performing the work and what actions were taken.
Decorative spray fountains are allowed in the pond, subject to the following criteria:
a. The minimum permanent pool volume is 30,000 cubic feet.
b. The fountain must draw its water from less than 2' below the permanent pool
surface.
C. Separated units, where the nozzle, pump and intake are connected by tubing,
may be used only if they draw water from the surface in the deepest part of the
pond.
d. The fountain may not be placed into the forebay.
e. The falling water from the fountain must be centered in the main pond, away from
the shoreline.
f. The maximum horsepower for a fountain in this pond is 1/6horsepower.
6. 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.
If the stormwater system was used as an Erosion Control device, it must be restored to
design condition prior to operation as a stormwater treatment device, and prior to
occupancy of the facility.
8. Access to the stormwater facilities shall be maintained via appropriate easements at all
times.
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.
Page 3 of 6

Post -Construction Stormwater Management
Permit No. SW8 080937
13. It is the responsibility of the permit holder, Thomas Concrete of South Carolina, Inc.
("Lessee"), to notify the Division of any changes in ownership and request an
ownership/name change for the stormwater permit. However, if the lease agreement or
contract between the Lessee and Benton Rentals, LLC ("Property Owner") is dissolved,
cancelled or defaults, and the Division is not notified by the Lessee to transfer the
permit, then the responsibility for permit compliance reverts to the Property Owner. A
complete transfer request must be submitted to the Division within 30 days as described
below otherwise the Property Owner will be operating a stormwater treatment facility
without a valid permit which is a violation of NC General Statue 143-215.1. Failure to
transfer the permit may result in appropriate enforcement action in accordance with
North Carolina General Statute §143-215.6A through §143-215.6C being taken against
the Property Owner.
14. 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.
15. 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.
III. GENERAL CONDITIONS
1. CORRECTIVE ACTIONS REQUIRED. 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.
2. PERMIT RENEWAL. 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).
3. CHANGES TO THE PROJECT NAME, PERMITTEE NAME OR CONTACT
INFORMATION. The permittee shall submit a completed Permit Information Update
Application Form to the Division within 30 days to making any one of these changes.
4. TRANSFER. This permit is not transferable to any person or entity except after notice to
and approval by the Director. Neither the sale of the project and/or property, in whole or
in part, nor the conveyance of common area to a third party constitutes an approved
transfer of the permit.
a. TRANSFER REQUEST. The transfer request must include the appropriate
application, documentation and the processing fee as outlined in 15A NCAC
02H.1045(2). This request must be submitted within 90 days of the permit holder
meeting one or more of the following:
Page 4 of 6

Post -Construction Stormwater Management
Permit No. SW8 080937
i. A natural person who is deceased;
ii. A partnership, limited liability corporation, corporation, or any other business
association that has been dissolved;
iii. A person or entity who has been lawfully and finally divested of title to the
property on which the permitted activity is occurring or will occur through
foreclosure, bankruptcy, or other legal proceeding.
iv. A person or entity who has sold the property, in whole or in part, on which the
permitted activity is occurring or will occur;
V. The assignment of declarant rights to another individual or entity;
vi. The sale or conveyance of the common areas to a Homeowner's or Property
Owner's Association, subject to the requirements of NCGS 143-214.7(c2),
b. TRANSFER INSPECTION. 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. Records of maintenance activities performed to date
may be requested. Projects not in compliance with the permit will not be
transferred until all permit and/or general statute conditions are met.
COMPLIANCE. The permittee is responsible for compliance with the terms and
conditions of this permit until the Division approves the transfer request.
a. APPROVED PLANS AND SPECIFICATIONS. A copy of this permit, approved
plans, application, supplement, operation and maintenance agreement, all
applicable recorded documents, and specifications shall be maintained on file by
the permittee at all times.
b. DIVISION ACCESS. The permittee grants Division Staff permission to enter the
property during normal business hours to inspect all components of the permitted
project.
C. ENFORCEMENT. 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.
d. ANNUAL CERTIFICATION. The permittee shall electronically submit to the
Division an annual certification completed by either the permittee or their designee
confirming the projects conformance with permit conditions
e. OBTAINING COMPLIANCE. 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 modified plans and certification
in writing to the Director that the changes have been made.
Page 5 of 6

Post -Construction Stormwater Management
Permit No. SW8 080937
OTHER PERMITS. 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.
Permit modified and reissued this the 15'1 day of July, 2022.
NORTH CAR•O,L(IINNA ENVIRONMENTAL MANAGEMENT COMMISSION
— li�
.�Xnan r nn, ecto
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 6 of 6

Attachment C - Permitting History
Benton Rentals, LLC
Permit No. SW8 080937
Approval
Date
Permit
Action
BIMS
Version
Description of the Changes
10/13/2008
Original
Approval
1.0
10/19/2020
Transfer
1.1
Transferred from Benton Ready Mix of
Brunswick to Thomas Concrete of South
Carolina, Inc. (lessee) and Benton Rentals,
LLC (property owner)
7/15/2022
Renewal
2.0
Expires 12/30/2029

Date R ceiv
Fee Paid
Permit Number
�15aa
15 —
su)�" 0Xo3
NC DEQ Division of Energy, Mineral and Land Resources
STATE STORMWATER:
PERMIT RENEWAL APPLICATION FORM
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 080937
2. Project name: Benton Rentals. LLC
3. Project street address: 197 Barnhill Road NW
City:
28462
County: Brunswick ZIP :
4. What, if any, changes have been made to the project as permitted?
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://deq,nc.gov/abouttdivisions/energy-
min eral-land-resources/energy-mineral-land-ru les/stormwater-prop 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 //deq nc goy/abouVdivisions/energy-mineral-land-
resnurceslenerav-mineral-land-rules/stormwater-Droaram/post-construction. State Stormwater Permits do not
automatically transfer with the sale of the property.
1. Current Permit Holder's Company Name/Organization: Thomas Concrete of South Carolina, Inc.
2. Signing Official's Name: Jim Ryder
3. Signing Official's Title: Vice -President / General Manager
4. Mailing Address: 124 Moats Fowler Road
City: Anderson State: SC ZIP: 29626
5. Street Address: 124 Moats Fowler Road
City: Anderson State: SC ZIP, 29626
6. Phone: [phone] x950 Email: iim ryderCaDthomasconcrete.com
z
JUL 15 2022
Stormwater Permit Renewal For 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:
i� 1. A permit application processing fee of $505.00 payable to NCDEQ.
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
f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the
signature of another entity.
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
TIC and protective covenants will be submitted at a later date.
`r, \ 4. O&M Agreements, Please select one:
® I 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.
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
A �/� ❑ The project has not yet been built.
v fn 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
n I 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).
his://www.sosnc.gov/online services/search/by title/ Business Registration
JUL 15 ZD22
Slonnwater Perini( Renewal Application Form Page 2 of 3 May 11, 2018

7
PERMITTEE'S CERTIFICATION
the person legally responsible for the permit, certify that I have
a copy of the Permitand 0&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 submit the proper forms to modify or transfer the permit prior to any changes to the
project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my
knowledge, correct and complete. 11
Signature Date:o`—
NOTARIZATION:
I h GLYI y 1 ri C I Cur V , a Notary Public for the State of
e County of F-F'Pt 17 4 %, om , do hereby certify
that ^r personally appeared before me
this the day of t A \ 20—zz and acknowledge the due
execution of the forgoing instrument. Witness my hand and official seal,
(Notary Seal)
Notary Signature: r'Jvla I Y 7 1 l -z'k.
My commission expires Apr I I 19. Zy 23
,111111111111"
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JUL 15 2022
BY. L",
Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018

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Permit Number: 5(. e O o43 -�L
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
Of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
❑ does ® does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4
Page 1 of 4

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

4
Permit Number:
(to he provided by OWQ)
Drainage Area Number:
BM element:
Potentialproblem:
How 1 will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. (if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 37.0 feet in the main pond, the
sediment shall be removed.
When the permanent pool depth reads 38.0 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 41.0'
39.0 Pe mancn Pool
------------ -- Volume Sediment Removal Elevation 37.0
37.0 -ft Min. ---------------------------- -------------
Sediment Bottom Elevation 33.0
Storage
FOREBAY
M.UN POND
I -ft
Storage
Form SW401-Wet Detention Basin O&M-Rcv.4
Page 3 of 4

Permit Number: P� ._
(to be providedby'DWQ.) VE ' i
1 acknowledge and agree by my signature below that I am responsible for the I FEB r 12929 1
performance of the maintenance procedures listed above. I agree to notify DWQJo'f any
problems with the system or prior to an changes to the system or responsibleparty..-
Project
P Y p Y b Y p
nume:Benton Ready Mix of Brunswick SW8 080937
BMP drainage area number:
Print name:
Title:Vice President, Coastal Division, Thomas Concrete of South Carolina, Inc.
Address: 1 18 Pipemakers Circle, Suite 100, Pooler, GA 31322
Note: 'rhe 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, S h an n 0 A G o r k , a Notary Public for the State of
i n County of y F t �j �O�Yy� , do hereby certify that
1 / Y\(—
personally appeared before me this
day of br uca_r _, 2020, and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
SKORMOLAIN
NOTARV PU"
W AOMM
SEAL
My commission expires A Dr I I 17 tZOZ3
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

„> .., IT
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. (if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC -Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and 6ot'readily penetrate into
accumulated sediments. ,
When the permanent pool depth reads 37.0 feet in the main pond, the
sediment shall be removed.
When the permanent pool depth reads 38.0 feet in the forebay, the sediment
shall be removed.
BASIN DIAGRAM
Oill in the blanks)RAiJGTQ:PI9At�
Permanent Pool
Sediment Removal . 38.0 Pe manes Pool
-------------- -- Volume Sediment Removal Elevation 37.0 V01ume
Bottom Elcvatio 37.0 S Min.
---------------------------------------- �------
Scdimcnt Bottom Elevation 33.0 I-ft n.
Storage Sediment
Storage
FOREBAY AMAIN POND
Form SW401-Wet Detention Basin O&M-Rcv.4
Page 3 of 4

61
Permit No.- -qAri ne6b A17
(to be provided by D WQ)
Ar
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Pad III) must be printed, filled out and submitted along with all of the required information
PROJECT INFORMATION
Project name Benton Ready Mix of Brunswick, Inc.
Contact person Donald M. Covil, P.E.
Phone number [phone]
Dale 23-Sep-08
Drainage area number (only one)
IL'DESIGN INFORMATION'
Site Characteristics
Drainage area
257,000.00
ft'
Impervious area
148,700.00
f?
%impervious
57.86
%
Design rainfall depth
1.50
in
Storage Volume: Non -SR Waters
Minimum volume required
18,335.00
it'
Volume provided
19,236.00
fP
Storage Volume: SR Waters
1-yr, 24-hr runoff depth
(n/a)
in
Pre -development 1-yr, 24-hr runoff
it,
Post -development 1-yr, 24-hr runoff
to
Minimum volume required
It'
Volume provided
it,
Peak Flow Calculations
1-yr, 24-hr rainfall depth
(n/a) in
Rational C, pre -development
(unitless)
Rational C, post -development
(unitless)
Rainfall intensity: 1-yr, 24-hr storm
inmr
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 flow control
ft'/sec
Basin Elevations
Basin bottom elevation
33.00
It
Sediment cleanout elevation
34.00
If
Bottom of shelf elevation
40.50
It
Permanent pool elevation
41.00
ft
SHWT elevation
//II '',
ft �V6ricf 7•s r
Top of shelf elevation
41.50
it
Temporary pool elevation
42.20
ft
6W A TF'� C:
O ��Oi Y
Form SW401-Wet Detention Basin -Rev 4 Parts I. & II. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWDJ
II.%DESIGN INFORMATION 4
j.
Volume and Surface Area Calculations
SA/DA ratio
0.58
limitless)
Surface area at the bottom of shelf
10,589.00
fe
Volume at the bottom of shelf
38,120.00
fl'
Permanent pool, surface area required
13,081.00
ft'
Permanent pool, surface area provided
13,322.00
ft'
OK
Permanent pool volume
Average depth for SA/DA tables
44,098.00
—3.31
ft'
ft
( \
OK 4,0 CStt 4-fe_)
Surface area at the top of shelf
16,205.00
ft'
Volume at the top of shelf
51,479.00
it
!
Forebay volume
8,965.00
it'
Forebay % of permanent pool volume
20.33
%
OK
Temporary pool, surface area provided
17,666.00
f"
Drawdown Calculations
Treatment volume drawdown time
2.50
days
OK
Treatment volume discharge rate
(n/a; routed Bow)
ft'/s
Pre -development 1-yr, 24-hr discharge
4.00
ft'/s
Decrease rate to < pre -development 1yr,24hr storm
Post -development 1-yr, 24-hr discharge
0.00
ft'/s
OK
Additional Information
Diameter of orifice
2.32
in
Design TSS removal
90
%
Basin side slopes
3.00
:1
OK
Vegetated shelf slope
10.00
:1
OK
Vegetated shelf width
10.00
ft
OK
Length of flowpath to width ratio
6.00
:1
OK
Length to width ratio
6A0
:1
OK
Trash rack for overflow & orifice?
Y
(Y or N)
OK
Freeboard provided
Y
It
OK
Vegetated filter provided?
N
(Y or N)
Design must be based on 90% TSS removal
Recorded drainage easement provided?
(n/a)
(Y or N)
OK
Capures all runoff at ultimate build -out?
Y
(Y or N)
OK
Drain mechanism for maintenance or emergencies
Y (pump down)
Form SW401-Wel Detention Basin -Rev 4 Parts I. a II. Design Summary, Page 2 of 2

State Stormwater Management Systems
Permit No. SW8 080937
Benton Ready Mix of Brunswick
Stormwater Permit No. SW8 080937 `r)
Brunswick Countv I I X
/I U
Designer's Certification]
I, A elb' e�L AVOK nllvl , as a duly registered
in the State of North Carolina, having been authorized to observe eriodica � eekly/
full time) the construction of the project,
BENfU.✓ .�FADY-/Y1lY pG fiRtl/VSis/C/[
(Project)
for &t- n REA-py xhr " i a1ysY✓!CK , GLC (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 e2s
Date 9
By. R i 7oog
Page 6 of 7

' State Stormwater Management Systems _
Permit No. SW8 080937
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.
A4*,l 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.
-L�W`6_ The outlet/bypass structure elevations are per the approved plan.
-A" 6. The outlet structure is located per the approved plans.
2_/ Trash rack is provided on the outlet/bypass structure:
-A �'8. All slopes are grassed. with permanent vegetation.
-44Z9. Vegetated slopes are no steeper than 3:1.
-M�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.
�,l 2: Required drawdown devices are correctly sized per the approved plans.
-Aa4n./ 13. All required design depths are provided.
✓14.All required parts of the system are provided, such as a vegetated shelf,
and a;forebay.
5. The"'required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Brunswick County Building Inspections
Page 7 of 7