SW8010628_CURRENT PERMIT_20011105

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE
� CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

OF
co
5
O
Ms. Judy Core, Vice President
Heatherton Park Limited Partnership
2700 Wyciiff Road, Suite 312
Raleigh, NC 27607
Dear Ms. Core:
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carotins Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Wilmington Regional Office
November 5, 2001
Subject: Permit No. SW8 010628
Heatherton Park Apartments
High Density Stormwater Project
Onslow County
The Wilmington Regional Office received a complete Stormwater Management Permit Application for Heatherton
Park Apartments on November 5, 2001. 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 Permit No. SW8 010628 dated November 5, 2001, for the construction of Heatherton Park Apartments.
This permit shall be effective from the date of issuance until November 5, 2011, 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) 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 Linda Lewis, or
me at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/arl: S:IWQSISTORMWATIPERMIT1010628.NOV
cc: David Koss, P.E.
City of Jacksonville Building Inspections
Linda'Lewis .
Wilmington Regional Office
Central Files
NMENR
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 [phone] Fax [phone] Customer Service
800-523-7748

State Stormwater Management Systems .
Permit No. SW8 010628
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and
other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Heatherton Park Limited Partnership
Heatherton Park Apartments
Onslow 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 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 November 5, 2011 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 on page
3 of this permit, the Project Data Sheet. The stormwater control has.been designed to handle the runoff from
66,692 square feet of impervious area.
3. Approved plans and specifications for this project are incorporated by reference and -are enforceable parts
of the permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per
approved plans.
5. 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.
6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into
the forebay of the permitted stormwater control system. A permit modification must be submitted and
approved prior to the construction of additional built -upon area from outside of the approved drainage area.
2

Y
State Stormwater Management Systems
Permit No. SW8 010628
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Name of Receiving Stream/Index #:
Classification of Water Body:
Pond Depth, feet:
Permanent Pool Elevation, FMSL:
Drainage Area, acres:
Total Impervious Surfaces, ft2:
Offsite Area entering Pond, ft2:
Required Surface Area, ft2:
Provided Surface Area, ft2:
Required Storage Volume, ft3:
Provided Storage Volume, ft3:
Temporary Storage Elevation, FMSL:
Controlling Orifice:
iIVISION OF WATER QUALITY
ROdECT DESIGN DATA SHEET
Heatherton Park Apartments
SW8 010628
Onslow County
Ms. Judy Core, Vice President
Heatherton Park Limited Partnership
2700 Wycliff Road, Suite 312
Raleigh, NC 27607
November 5, 2001
White Oak / Sandy Run Branch 1 19-10-1
"SC NSW"
3.5
41.75
3.16
66,692
None, per Engineer
6,669
7,430
5,575
5,899
42.5
1.375" cp pipe
3

State Stormwater Management Systems y
Permit No. SW8 010628
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in it's entirety, vegetated and operational for its
inteiicled 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.
The permittee 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. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and 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
ofDWQ. The records will indicate the date, activity, name of person performing the work and what actions
were taken.
Decorative spray fountains will not be allowed in the stormwater treatment system.
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, 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.
8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior
to operation as a stormwater treatment device, and prior to occupancy of the facility.
9. A modification must be permitted prior to any construction. The following items will require a modification
to the permit. The Director may determine that other revisions to the project should require a modification
to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision, acquisition, or sale of the project area. The project area is defined as all property
owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the
approved plans, prior to construction. If the proposed BUA exceeds the pemitted amount, a modification
to the permit must be submitted and approved prior to construction.

State Stormwater Management Systems
Permit No. SWS 010628
11. 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.
12. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days.
13. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities
shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale
of any portion of the property.
14. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area.
15. The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements ofthe permit. Within the time frame specified in the notice, the permittee shall submit awritten
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. In the event there is a desire for the facilities to change ownership, or there
is a name change of the Permittee, a formal permit request must be submitted to the Division of Water
Quality accompanied by an application fee, 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. Responsibility for compliance with all permit conditions remains with the Permittee
until such time as the Division approves the formal permit 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.
3. 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)
which have 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.
5. The permittee grants DENR Staff permission to enter the property for the purpose of inspecting all
components of the permitted stormwater management facility.
6. 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 stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual.
Permit issued this the 5th day of November, 2001.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
.-� Gregory J. Thorpe, Phi., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SWS 010628
5

State Stormwater Management Systems
Permit No. SW8 010628
Heatherton Park Apartments
Stormwater Permit No. SW8 010628
Onslow County
Designer's Certification
I, , as a duly registered
in
the State of North Carolina, having been authorized to observe (per)odically/weekly/full time) the construction of
the project,
(Project)
for (Project Owner) hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the project construction such that the construction was observed to be
built within substantial compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
63WSM
C1

State Stonnwater Management Systems
Permit No. SW8 010628
Hcatberton Perk Apartments
Storn1water Permit No.: SW8 010628
Onslow County
Designer's Certification
1, , as a duly registered in
the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of
the project,
(Project)
for (Project Owner) hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the project construction such that the construction was observed to be
built within substantial compliance and intent of the approved plans and specifications.
The checklist'of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
2

State Stormwater Management Systems
Permit No. SW8 010628
Certification Requirements:
l . 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. The outlet/bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack'is provided on the outlet/bypass structure.
7. All slopes are grassed with permanent vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-circuiting of the system.
10. The permitted amounts of surface area and/or volume have been provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf,•and a forebay.
14. The overall dimensions of the system, as shown on the approved plans, are provided.
cc: NCDENR-DWQ Regional Office
City of Jacksonville Building Inspections
7

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Date Received
Fee Paid
Permit Number
0/0& 2 Ry
State of North Carolina "
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This forn) may be photocopied for use as an original
1. GENERAL INFORMATION
I. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Heatherton Park Limited Partnership
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Gone- 01re, PAL's„oeas
3. Mailing Address for person listed in item 2 above:
2700 Wycliff Road, Suite 312
City: Raleigh State: N_C_ Zip: 27607
Telephone Number: (91 9 } 51 0 _ 9 60
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.).-
Heatherton Park Apartments
5. Location of Project (street address):
Commerce Road -
City: Jacksonville County: Onslow
G. Directions to project (from nearest major intersection):
From Jacksonville on US17 turn ri9hl on W_er_ksho.p_R
turn left on Commerce Road, Site is empty fi eld__on--the_r_i.ghr_—__-_
a Riti
7. Latitude: '34 -�tO -' Longitude: 7r - Z S ' l' of project
S'
8. Contact person who can answer questions about the project:
David M. Koss. PE
H. PERMIT INFORMATION:
1. Specify whether project is (check one)
Telephone Number: (__2_5_2__L2.3 7 41 3
X New
Form SWU-101 Version 3.99 Page 1 of
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 No and its issue date (if known)
3. Specify the type of project (check one):
Low Density High Density Redevelop General Permit Other
4. Additional Project Requjrements (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 stornwater management for the project .
bpvY f6oM 1 pgAyows. No C�t.c,�are o r►i A Wer QmT .N P-luv
�irWASVE I�At�s ��pM f�,�° r3 R , LAA do 6 Dui 4-%JcNAC .
2. Stormwater runoff from this project drains to the NL' 1 River basin.
3. Total Project Area: 4 •,Dc, acres
5. How many drainage areas does the project have?,
4. Project Built Upon Area: 39 %
6. . 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 Informatro'n _
: , 7;'Dralnage °Area 1 ;,
j lr'`�`,uDrainage Area
Receiving Stream Name
Receiving Stream Class
rGtt
Drainage Area
3.1b
Existing Impervious` Area
0
Proposed Impervious'Area
�, S3 AG
ImperviOLls; Area (total)
4 V,.
lrnpeivlous*,Surface Areak..
Dralriage Area 1
.`.Drainage Area 2
On -site Buildings
Zgj OSS kz
On -site Streets
_.
On -site Parking
3 CO 3 L
On -site Sidewalks
siCLVOtrr7
Other on -site
Off -site
Total lob L6 L 1.53 o
Total:
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4

7, 1-low was the off -site impervious area listed above derived? N JA
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 stormwater management permit modification prior to
Construction.
5. All permitted runoff from outparcels or future development shall be directed into the permittedstormwater control
system. These connections to the stormwater 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 [phone] 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 4

•r ,
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.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
itials
• 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)
VII. 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.
Designated agent (individual or firm): fa4kX4 s Pkarf,rl , DAJ Id A kv-%S. A
Mailing Address: 'P o. 6c Y- J boS - 12 s W. aA 4 N 0 ST&V
City: W I LSA►J State: hJe' Zip: Z1 v
Phone: ( Z 52 ) z$7- 4131a
Fax: ( 252 ) 237-4m
VIII. APPLICANT'S CERTIFICATION 1
I, (print or type name of -person listed in General Information, item Z) �V�V
certify that the information included on this permit application form is, to the Best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H _Innn_ n /1
Signature:
Form SWU-101 Version 3.99 Page 4 of 4
Date: V

Permit No. 5w $ D 10 (0ts
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: kSA'TAE�'1'oN PA/)e— AMAT.{Emrgr,
Contact Person: D AUW AA. kAss , PE Phone Number: (ZS-L) 23 -4136
For projects with multiple basins, specify which basin this worksheet applies to: P)A
elevations
Basin Bottom Elevation 3$.2S ft, (floor of the basin)
Permanent Pool Elevation A1.15 ft. (elevation of the orifice)
Temporary Pool Elevation 42.so ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area . 14so sq. ft. (water surface area at the orifice elevation)
Drainage Area 3.1l0 ac. (on -site and off -site drainage to the basin)
Impervious Area 1.S�b ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volkrmc
Forebay Vol unic
Other parameters
SA/DA
Diameter of On f icc
Design Rainfall
Design TSS Removal Z
11130$ cu. fi. (combined volume of main basin and forebay)
S99a cu. ft. (volume detained above the permanent pool)
S6$7- cu. ft. (approximately 20% of total volume)
4.6 (surface area to drainage area ratio.from DWQ table)
1.3'1S in. (2 to 5 day temporar)J pool draw-dorvrr required)
in.
90 % (minimum 85% required)
Dorm SWU-l02 Rev 3.99 Page l of 4

Footnotes:
1 When using the Division SA/DA tables, the correct SA/DA ratio for pennanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement ror a vegetative filter may be waived irthe wet detention basin is designed to provide
90%TSS removal. The NCDFNR BAIP manual provides design tables for both 85% TSS removal and 90%TSS removal.
11. 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 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. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
MA e. If required, a 30-foot vegetative f lter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3: 1.
g. The basin side slopes above the permanent pool are no steeper than 3: L
h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage casement is provided for each basin including access to nearest right-
of-way. (014kE"ACLL43 fgoAA P AIC-i oz, AA M )
1. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
tm. A ;mechanism is sped fled which will drain the basin for maintenance or an emergency.
Ill. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
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) 0 does does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does Xdoes not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
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 3.0 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 2.2 S feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 4 1'1 5
Sediment Re oval El. 3q•So 75 ° 36,75
_____________ __ Sediment Removal Elevation 75%�
--
Bottom Ele alion 311.1S %-------------------=------------------------- -
Bottom Elevation 38 25 25/°
3
FORF RAY MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
G. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of

7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
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
Title:
Addri
Phony
Signature:
--6
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
i, c-7 a71 �'}a r7 n , a Notary Public for the �State of _111pr I'J (04,
County of 0a,IC,V-- , do hereby certify that
personally appeared before me this 11-4 dayof—MaU ' OO , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
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e
PUBLIC
rC O U��,,`���
SEAL
My commission expires q- ri - 0,00-5-
Fonn SWU-102 Rev 3.99 Page 4 of 4