HomeMy WebLinkAboutSW6070401_CURRENT PERMIT_20070503STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW &�21oz
DOC TYPE
CURRENT PERMIT
(❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE�i
YYYYM M D D
9
�I
WA
Michael F. Easley, Governor
l
> 7
Mayl, 2007
I
Department of Lie Army, Fort Bragg
Attu: Gregory G. Bean, Directorate of Public Work;
Building 3-1634 Butner Road
Fort Bragg, NC 28310-5000
SUBJECT:
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Stormwater Permit No. SW607040i
SOF Rowe Training Facility Phase Camp NlacKall
Fligh Density Project
Camp NlacKall-Fort Bragg, Richmmd County
Dear Mr. Bean:
t`
Alan W. Klimek, P.F. Director
Division of Water Quality
The Fayetteville Regional Office of the Divisionof Water Quality received a complete
Stormwater Management Permit Application for the SOF Rowe Training Facility Phase V, Camp
MaeKall project on April 24, 2007. Staff review of the plans and specifications has determined that the
project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H
.1000. We are forwarding herewith Permit No. SW607f.401 dated May 3, 2007, for the construction and
maintenance of stormwater treatment facilities associates with the SOF Rowe Training Facility Phase
V, Camp MaeKall project.
This permit shall be effective from the date of issuance until May 2, 2017, and shall be subject to
the conditions and limitations as specified therein. Please pay special attention to the Operation and
Maintenance requirements in this permit. Failure to establish an adequate system for operation and
maintenance of the stormwater management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) calendar days following
receipt of this permit. This request must be in the form of,a written petition, conforming to Chapter
150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O.
Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and
binding.
If you have any questions, or need additional information concerning this matter, please contact
Mike Lawyer or myself at (910) 433-3300.
Sincerely,
_fD
Belinda S. Henson
Regional Supervisor
Surface Water Protection Section
BSI-1: ML/ml
cc: Richard E. Young, PE -Reynolds, Smith and Hills, Inc.
FRO -Surface Water Protection
Water Quality Central Files
Notr hCarolina
Alaturally
North Carolina Division of Water Quality 225 Green Street -Suite 714 Fayetteville, NC 28301 Phone (910) 433-3300 Customer Service
Internet: www_newteemnality ore Fax (910) 486-0707 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper
STATE OF NOR71 CAROLINA
DEPARTMENT OF ENN"IRONMEH' AND NATURAL RESOURCES
DIVISION OF WETER QUALITY
STATE STORIVIWAI NNAGEIVIENT PERMIT
I
HIGH DENSITY)EN'ELOPMENT
I
In accordance with the provisions of Article 21 of(hapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Re Ulatlons
PERMISSION IS HEEREBY GRANTED TO
Department of the Anny, Fort Bragg
SOF Romve Training Faulhy Phase V. Camp MacKall
Camp MacKoll-Tort Bragg, Richmond County
FOR T13E
construction, operation and maintenance of an infiltration basin in compliance with the provisions of
15A NCAC 211 .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater
management plans and specifications and other supporting data as attached and on file with and
approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until May 2, 2017, 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. on page 3 of this permit. The stormwater control has been designed to
handle the runoff from 24,213 square feet of impervious area. This basin must be operated with a
30' vegetated filter.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and
per approved plans.
4. Because all stormwater collection and treatment systems are located on federally owned land,
dedicated common areas or recorded easements are not required.
5. The runoff from all built -upon area within the permitted drainage area of this project must be
directed into the permitted stormwater control system.
6. The following design criteria have been provided in the infiltration basin and must be maintained
at design condition:
a.
Drainage Area, acres:
1.69
Onsite, W:
73,542
Offsite, ft2:
NA
b.
Total Impervious Surfaces, fe:
24,213
C.
Design Storm, inches:
3.06
d.
Basin Depth, feet:
1.9
C.
Bottom Elevation, FMSL:
333.5
f.
Bottom Surface Area, ft2:
6,708
g.
Bypass Weir Elevation, FMSL:
335.4
h.
Permitted Storage Volume, ft':
18,727
L
Type of Soil:
WcB (Wakulla and Candor)
j_
Expected Infiltration Rate, in/hr:
15.38
k.
Seasonal High Water Table, FMSL:
328.6
1.
Time to Draw Down, horns:
48
In.
Receiving Stream/River Basin:
Drowning Creek/Lumber
u.
Stream Index Number:
14-2-(10.5)
o.
Classification of Water Body:
"C;Sw,HQW"
11. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety and operational for its
intended use prior to the construction of any built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will
be repaired immediately.
3. The permittec shall at all times provide the operation and maintenance necessary to assure the
permitted stormwater system functions at optimum efficiency. The approved Operation and
Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled
intervals including, but not limited to:
a. Semi-annual scheduled inspections (every 6 months).
b. Sediment removal.
C. Immediate repair of eroded areas.
d. Maintenance of all slopes in accordance with approved plans and specifications,
including 2" depth of NCDOT No. 57 stone used for cover.
e. Debris removal and unclogging of bypass structure, infiltration media, catch basins,
piping and No. 57 stone cover.
f. A clear access path to the bypass structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon request to authorized
personnel of DWQ. The records will indicate the date, activity, name of person performing the
work and what actions were taken.
The facilities shall be constructed as shown on the approved plans. This permit shall become
voidable unless the facilities are constructed in accordance with the conditions of this permit, the
approved plans and specifications, and other supporting data.
Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior
to operation of this permitted facility, the attached Designer's 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 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. The permittee shall submit to the Director and shall have received approval for revised plans,
specifications, and calculations prior to construction, for any modification to the approved plans,
including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormvater
management measures, built -upon area, details, etc.
b. Project name change.
c. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project
area is defined as all property owned by the permittee, for which Sedimentation and
Erosion Control Plan approval or a CAMA Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
The permittee shall submit final site layout and grading plans for any permitted future areas
shown on the approved plans, prior to construction.
10. A copy of the approved plans and specifications shall be maintained on file by the Permittee for
a minimum of ten years from the date of the completion of construction.
] 1. The Director may notify the permittee when the permitted site does not meet one or more of the
mininnun requirements of the permit. Within the time frame specified in the notice, the permittee
shall submit a written time schedule to the Director for modifying the site to meet minimum
requirements. The permittee shall provide copies of revised plans and certification in writing to
the Director that the changes have been made.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director. In the event of
a change of ownership, or a name change, the permittee must submit a formal permit transfer
request to the Division of Water Quality, accompanied by a completed name/ownership change
form, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may not be
approved. The pernuttee is responsible for compliance with all permit conditions until such time
as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the Division of Water Quality, in accordance with North
Carolina General Statute 143-215.6A to 143-215.6C.
The issuance of this permit does not preclude the Permittee from complying with any and all
statutes, rules, regulations, or ordinances, which may be imposed by other government agencies
(local, state, and federal) having jurisdiction.
4. - In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be
required by this Division, such as the construction of additional or replacement stormwater
management systems.
The permittee grants DENR Staff permission to enter the property during normal business hours
for the purpose of inspecting all components of the permitted stormwater management facility.
The permit may be modified, revoked and reissued, or terminated for cause. The filing of a
request for a permit modification, revocation and reissuance, or termination does not stay any
permit condition.
Unless specified elsewhere, permanent seeding requirements for the stonnwater control must
follow the guidelines established in the North Carolina Erosion and Sediment Control Planning
and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address changes within
30 calendar days.
Permit issued this the third day of May 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Gt� n7
Alan W. Klimek, P. E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit No. SW6070401
SOF Rowe Training Facility Phase V, Camp MacKall
Stoi inwater Permit. No. S W 6070401
Camp MacKall-Fort Bragg, Richmond County
Designer's Certification
1, as a duly registered
Carolina, having been authorized to observe (periodically/ weekly/ full time)
project,
(Project)
in the State of North
the construction of the
for (Project. Owner) hereby state that, to the best of my
abilities, due care and diligence was used in the observation of the project construction such that the
construction was observed to be built within substantial compliance and intent of the approved plans and
specifications.
The checklist of items on page 2 of this form is a part of this Certification.
Noted deviations from approved plans and specifications:
SEAL
Signature
Registration Number
Date
Certification Requirements:
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the permitted amount of built -
upon area.
3. All the built -upon area associated with the project is graded such that the runoff drains to
the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The bypass structure weir elevation is per the approved plan.
6. The bypass structure is located per the approved plans.
7. A trash rack is provided on the bypass structure.
8. All slopes contain 2" of NCDOT No. 57 stone.
9. 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.
l 1. The permitted amounts of surface area and/or volume have been provided.
12. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
,_OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
-ZY-o
'Y o GAezk # 7Zo7'f
SW60-76yo
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original Z 4 2007
AYK
I. GENERAL INFORMATION
1. Applicants n/amee (specify the name of the corporation, individual, etc. who owns the project):
Uni ;'FG't `r�t- ,lcjC Ga\tPrn MPV%+ _ l t.S. A,?^. /
2. Print Owner/Signing Official's name and title (person legally responsible for
3. Mailing Address for person listed in item 2 abo
3Uo. 3-16343 LJ ner'
City:3�ct__e_cA� camMatt
Telephone
"C zip: 2,5_1L 5000
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Sod R F o<f � N( l �� 1 DW P_ Ir-s1.•.(na G.Ct V. utn Q.0 6
- 5. Location of Project (street address):
6. Directions to project (from nearest major intersection): tt I
U'__ w! dt k 3aa1�1 Cmm Abei'deeA ►V
tP rtti%-S
[ t
t
7. Latitude: 35cp2 5a•z 4 Longitude: �� 24�_ �J7 _ of project
8. Contact person who can answer questions about the project: Name:__Telephone Number: ( ^7' io 4 3 Z -7z l7
II. PERMIT INFORMATION: //
1. Specify whether project is (check one): V _New
Form SRrU-101 Version 3.99 Pagel of 4
___Renewal ___Modification
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number Al �/�and its issue date (if known)AVl
3. Specify the type of project (check one):
_Low Density _High Density develop _General Permit Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major ✓ Sedimentation/Erosion Control _404/401 Permit ✓ NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how Stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing
(s"tormwater management forthepgct . —
11E i tot Xq 6 l�04 c�euAon )v � S NrMWu ie1 ruN077 vt
2. Stormwater runoff from this project drains to the '/ eo w n I �lq �re�'`�.,, Rivenbasin.
3. Total Project Area: r b _acres 4. Project Built Upon Area: 3_2_.- 1
5. How many drainage areas does the project have?I
G. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin=Infdrmatimi, � rr y 'ry
r f4:,x, y+Dramage Areavl,.A;,
Receiving Stream Name
broCT P-
WA
Receiving Stream Class
%A QVI/ 14
Drainage Area
1.(09 CtC.
Existing Impervious' Area
O 21 Q%
Proposed Impervious�Area
Q , 5 (a O. Cr
% Impervious* Area (total)
32,Ci'7
IIm ervrous Suirfa_ce Area
Drain age Area 1 ?
j'"' �' `'`:Drama e Area 2 , 7�g
On -site Buildings
0.46
On -site Streets
0.0 O 0. G
On -site Parking
G Q
On -site Sidewalks
p A CG
Other on -site
j Q C,
Off -site
O Cl,q.�
Total:r G � 0.G) 7
Total:
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
sV,r! � 11 r� s of (S
Form SWU-101 Version 3.99 Page 2 of
7. How was the off -site impervious area listed above derived? N (r�
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state storrnwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the storrnwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
Original and one copy of the Stormwater Management Permit Application Form
One copy of the applicable Supplement Form(s) for each BMP
Permit application processing fee of $420 (payable to NCDENR)
Detailed narrative description of stormwater treatment/management
Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
Scale
Revision number & date
Mean high water line
Dimensioned property/project boundary
Location map with named streets or NCSR numbers
Original contours, proposed contours, spot elevations, finished floor elevations
Details of roads, drainage features, collection systems, and stormwater control measures
Wetlands delineated, or a note on plans that none exist
Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
Drainage areas delineated
Vegetated buffers (where required)
VIL AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section. ' , r /) r
Designated agent (individual), Ior firm):
N MailingAddress:_2235 . Gour
Phone:
VIII. APPLICANT'S CERTIFICATION
rd
. State: rt qq r7ip: 3ZZg53
Fax: ('�ZI ) 453' ®4*43
1, (print or type name of person listed in General Information, item 2) lam « Q GP1 G - 'Re-0.A
certify that the information i e on this permit application form is, tot be t of my knowledge, correct and
that the projec�will be strut[ m conformance with the approved plans, that the required deed restrictions
and protective ants wi] e recorded, and that the proposed project complies with the requirements of 15A
NCAC /
Form SWU-101 Version 3.99
Page 4 of 4
Permit No.
(to be provided by D IVQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
n � t
Project Name: p�SO` icowe `�a'0.tM1i✓cC{ To-fk�'ty Cam? 1��Ge��aA
Contact Person: ,c."Ut-A Phone Number: (qto) 43l
r
This worksheet applies to: Basin No. I oS?--DUCL4P6D in Drainage Area 1• 6 q aG
(as identified m plans) (from Form SWU-101)
II. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be
based upon an actual field investigation and soil borings. County soil maps are not an acceptable source
of soils information. All elevations shall be in feet mean sea level (finsl).
Soils Report Summary
Soil Type
Infiltration Rate
SIIWT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
FormSWU-103 Rev3.99
\Ae in/hr]
Z15. 3 8 or ef/hr/sf (circle appropriate units)
.J S- G.O fmsl (Seasonal High Water Table elevation)
5 O 60 inch
i� I Z 7 c. f.
2 days
30 ft. X
$02 c.f.
333, 5 finsl
53S.4 fmsl
33(0.0 fmsl
(1.5 inch event for SA waters, l inch event for others)
223. G ft. _ 1 0 S sq. ft. (bottom dimensions)
Page I of 3
111. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
Yb. System is located at least 100 feet from water supply wells.
YC. Bottom of system is at least 2 feet above the seasonal high water table.
i
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
Yt e. System is not sited on or in fill material or DWQ approval has been obtained.
N - YED. LAnt3 f System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
Yg. Drainage area for the device is less than 5 acres.
Yh. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
Yi. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for
areas draining to SA waters ). Design volume and infiltration calculations attached.
j. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage. Calculations attached.
k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
Y1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
Ym. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or
0.4 M . 44 dense vegetative cover is provided.
G�aetC n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
\ length is 50 feet for SA waters, 30 feet for other waters).
9 o. Flow distribution mechanism within the basin is provided.
p. A benchmark is provided to determine the sediment accumulation in the pretreatment device.
A' q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
Yr. System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days. A soils report and all
pertinent draw -down calculations are attached.
Ys. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
Fonn SWU-103 Rev 3.99 Page 2 of 3
IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion,
trash accumulation, vegetative cover, and general condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, snow
vegetated cover to maintain a maximum height of six inches, and remove trash as needed.
3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved design
specifications.
4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth
in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the
original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed. Removed
sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will
adversely impact water quality (i.e. stockpiling near a stormwater treatment device orstream, etc.).
A benchmark shall be established in the pretreatment unit. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the design depth reads �31'� feet in the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
5. If the Division determines that the system is failing, the system will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater
control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the five
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.
Print Name and
Address:
Phone:
T ,11sr
.WP,2i..19
!U
Note: The legall responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident the subdivision has been named the president.
a Notary Public for the State of
do hereby certify that
day of , and acknowledge
Witness my hand and official seal, '
SEA wad My commission
rtew
o e.�'stip offi ca.,A.
Form SNAFU-103 Rev 3.99 44t Page 3 of 3
personally appeared before me this_
of the forgoing infiltration basin maintenance requirements.