SW8061028_CURRENT PERMIT_20061218

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
CURRENT PERMIT
r
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
/�o2
YYYYMMDD

TRANSMITTAL LETTER
TROUTMAN
1 y--- -TANNER
TO
FROM
LINDA LEWIS
Mark T Arcun, PE
COMPANY
DATE
NCDENR - Stormwater
November 20, 2007
ADDRESS
CTT 8 PROJECT NUMBER
127 Cardinal Drive Extension
5724 - NCDENR Stormwater Permit
Wilmington, NC 28405
PHONE NUMBER
CLIENTS REFERENCE NUMBER
910-796-7215
RE
Alliance Credrt Union
Permit # SW8061028 - Designer's Certrfication
WETRANSMIT I] ATTACHED © UNDER SEPARATE COVER ❑ HAND CARRIED BY O UPS/FEDEX
THE FOLLOWING' ❑ TRACINGS []PRINTS ❑ INSPECTION REPORT ❑ SHOPORAWINGS ❑ SPEaFICATioNB ❑ OTHER
COPIES
DATE
SHEET NO
DESCRIPTION
REMARKS
1 ORIG
11-20-07
STORMWATER CERTIFICATION
NOTES/COMMENTS
CTT File (one copy of all)
RECEIVED
NOV 2 6 2007
„ jet
CRISER TROUTMAN TANNER CONSULTING ENGINEERS
W ILMrNGTGN NC RAL8ION IIIC
P 0 Box 3727 Wilmington NC 28406 I 3809 Peachtree Ave Suite 102 Wilmington NC 284D3 p 910 397 2929 / 910 397 2971 cttengineering cam

State Stormwater Management Systems
Permit No SW8 061028
Alliance Credit Union
Stormwater Permit No SW8 061028
New Hanover County
Designer's Certification
1, A 1ZLi k-V-Gi n-I, PC.�, as a duly registered
in the State of North Carolina, having been authorized to observe (penodicall / weekly/
full time) the constrru-ction of the project,
Allarl ct
(Project)
for A—t l taACR CreS14 UIIZZI % (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
S EAL
Signature
Registration Number G 2A4 i
Date od.9 ZO _200`1
�,6v 24 1&0?
Page 6 of 7

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December 18, 2006
Mary Ann Petersen
Alliance Credit Union
3315 Almaden Expressway, Suite 55
San Jose, CA 95118
Subject Stormwater Permit No. SW8 061028
Alliance Credit Union
High Density Project
New Hanover County
Dear Ms Petersen
Michael F Easley, Governor
WilltannG Rossk,5ecretary
North Carolina Department of Environment and Natural Resources
Alan W Klimek, P E Director
Division of Water Quakily
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Alliance Credit Union on December 13, 2006 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 061028
dated December 18, 2006, for the construction of the subject project
This permit shall be effective from the date of issuance until December 18, 2016, 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 sixty (60) 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 0 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]
Sincerery,
ward Beck d�
Regional Supervisor
Surface Water Protection Section
S IWQSISTORMWATERIPERMIT1061028 dec06
cc Mark T Arcuri, Criser Troutman Tanner Consulting Engineers
Kelly Johnson, DWQ
Tony Roberts, New Hanover County Building Inspections
City of Wilmington Development Services
Beth E Wetherill, New Hanover County Engineering
Linda Lewis
Wilmington Regional Office N0M carp tna
Central Files , 'atumily
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional OfEice Internet wwwncwater uaht org Fax [phone].623-6748
An Equal OpportunttylAffirmattve Action Employer— 50% Recycled110% Post Consumer Paper

State Stormwater Management Systems
Permit No SW8 061028
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
Mary Ann Petersen, Alliance Credit Union
Alliance Credit Union
5620 Carolina Beach Road, Wilmington, New Hanover 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 December 18, 2016, 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 16 on page 3 of this permit The stormwater
control has been designed to handle the runoff from 36,001 square feet of
impervious area
3 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
4 The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system
Page 2 of 7

State Stormwater Management Systems
Permit No SW8 061028
5 The following design criteria have been provided in the wet detention pond and
must be maintained at design condition
a DrainaArea, acres 1 26
gnsite, ft 2 54,918
Offsite, ft 0
b Total Impervious Surfaces, ft' 36,001
c Design Storm, inches 1
d Pond Depth, feet 35
e TSS removal efficiency 90%
f Permanent Pool Elevation, FMSI 245
g Permanent Pool Surface Areq, ft 4,141
h Permitted Storage Volume, ft 26,354
1 Temporary Storage Elevation, FMSL 2813
f Controlling Orifice 0 5" O pipe
k Permitted Forebay Volume, ft3 871
1 Receiving Stream/River Basin Mott Creek ! Cape Fear Basin
m Stream Index Number 18-82
n Classification of Water Body "C-SW"
II SCHEDULE OF COMPLIANCE
1 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
2 During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately
3 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 slopes and the vegetated filter
d Immediate repair of eroded areas
e Maintenance of all slopes in accordance with approved plans and
specifications
f Debris removal and unclogging of outlet structure, orifice device, flow
spreader, catch basins and piping
g Access to the outlet structure must be available at all times
4 Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ The records will indicate the date,
activity, name of person performing the work and what actions were taken
5 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
Page 3 of 7

State Stormwater Management Systems
Permit No SW8 061028
6 Decorative spray fountains will be allowed in the stormwater treatment system,
subject to the following criteria
a The fountain must draw its water from less than 2' below the permanent
pool surface
b 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
c The falling water from the fountain must be centered in the pond, away
from the shoreline
d The maximum horsepower for a fountain in this pond is 1/8 horsepower
7 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
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 Access to the stormwater facilities shall be maintained via appropriate
easements at all times
10 The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below
a Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc
b Project name change
c Transfer of ownership
d Redesign or addition to the approved amount of built -upon area or to the
drainage area
e Further subdivision, acquisition, lease or sale of all or part of the project
area The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought
f Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan
11 The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction
12 A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction
13 The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made
Page 4 of 7

State Stormwater Management Systems
Permit No SW8 061028
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 permittee 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.
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) having jurisdiction
4 In the event that the facilities fad 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 during normal
business hours 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
7 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
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 in writing of any name, ownership or
mailing address changes within 30 days
Permit issued this the 18t' day of December 2006
NORTH AROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for lime , rrector
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No SW8 061028
Alliance Credit Union
Stormwater Permit No SW8 061028
New Hanover Count
Designer's Certification
as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the protect,
(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
Page 6 of 7

State Stormwater Management Systems
Permit No SW8 061028
Certification Requirements
1 The drainage area to the system contains approximately the permitted
acreage
2 The drainage area to the system contains no more than the permitted
amount of built -upon area
3 All the built -upon area associated with the project is graded such that the
runoff drains to the system
4 All roof drains are located such that the runoff is directed into the system
5 The outlet/bypass structure elevations are per the approved plan
6 The outlet structure is located per the approved plans
7 Trash rack is provided on the outlet/bypass structure
8 All slopes are grassed with permanent vegetation
9 Vegetated slopes are no steeper than 3 1
10 The inlets are located per the approved plans and do not cause short-
circuiting of the system
11 The permitted amounts of surface area and/or volume have been
provided
12 Required drawdown devices are correctly sized per the approved plans
13 All required design depths are provided
14 All required parts of the system are provided, such as a vegetated shelf,
and a forebay
15 The required system dimensions are provided per the approved plans
cc NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
Page 7 of 7

OFFICE USE ONLY w
PateReceived Fee Paid Permit Number
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 orlgfnal
I GENERAL INFORMATION
1 Applicants name (Specify the name of the corporation, individual, etc who owns the project)
2 Print Owner/Signing Official s name and title (person legally responsible for facility and compliance)
tAA-V—`I' fNtN r _-
3 Mailing Address for person listed in item 2 above
C1ty Sw.A IDS _ - _ _ -- _ _-- -- State -- - zip ....951 1
Telephone Number ( 4-06 ) "'; __-
4 Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans
specifications, letters operation and maintenance agreements, etc)
_ A u. t .� LINti _ - ---_ — __ ---- -
5 Location of Project (street address)
City — _ W 1 L.M I (�11k" _ _--- ----- County _L4 1 Lkt N�V E
6 Directions to project (from nearest major intersection)
024: M 11,E6 '%'t� f �• 'S +ZV tCC T IZ 11T_`n le 2-5011:2r t
7 Latitude L4 40
� 1 it Longitude U� 1 `� �J3 of project
8 Contact person who can answer questions about the project
Name ,(�!lpt �A�f"'c _Lu R-{ P _ -- Telephone Number ( Ql 1
ll PERMIT INFORMATION
1 Specify whether project is (check one) —_ C New Renewal --,_, Modification
Form SWU-101 Vernon 3 99 Page I of 4

2 If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number- 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 Requirements (check applicable blanks)
_— CAMA Major X 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 stormwater management for the project__ {�
/xot.-S -W#.f> V.4n v;Li tnrn% di v 0 eLC dl" fbv,4-PA 4-a
1_. . 1'_' _ . ._. r_. _ 1_ 1 _ 11 _ --L-
2 Stormwater runoff from this project drains to the Cie& V—gw, River basin
3 Total Project Area z- . 0 3 acres 4 Project Built Upon Area %
5 How many drainage areas does the project have? I
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 Information,
Drainage'Area 1 _
Diainage Area 2
Receiving Stream Name
—
Receiving Stream Stream Class
Drainage Area
5 l
Existing Impervious* Area
Q
Proposed Impervious*Area
'Zj(p Q e l
% Impervious* Area (total)
11
Impervious" Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
•� Qp �-�
On -site Streets
On -site Parking
On -site Sidewalks
16
Other on -site
Off -site
Total '726,p©1
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

7 How was the off -site Impervious area listed above derived? MA
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
Na 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 t•1 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 permitted stormwater 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 alI 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

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
Initials
• Original and one copy of the Stormwater Management Permit Application Form _ M't'Ar
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of,%4261payable to NCDENR) ;
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, includingT�-
-
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
-t'r_4>u.TMAt!
Designated agent (individual or firm) M MZAd - -T.'
Mailing Address__S909 AeJE
City --AA-t tL-Ak%lUfr t�t�----------- _ State t4C_ Zip
Phone ( '�t 10 ) 3A 9 - 2.'121 Fax ( 91 !0 )_ -39,119 n i
VIII APPLICANT'S CERTIFICATION
1, (print or type name of person listed in General Information item 2) MPR No-r—J ' _1e_rE 5
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 1000 Q
SigndtureA�� _ Date
Form SWU-101 Version 3 99 Page 4 of 4

Permit No '5WyC)&10eZ3
(to he provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality fi
STORMWATER MANAGEMENT PERMIT APPL,ICATIO
WET DETENTION BASIN SUPPLEIV
This form inay be photocopied for Use as an original
�oe�Q
DEC 1 3 2006
DWQ 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 ALA— I A NC L C fz f-1>r T (AM► ON
Contact Person M . ✓. P Phone Number (It0_)_9i`!-.S"/_S/
For projects with multiple basins, specify which basin this worksheet applies to
elevations
Basin Bottom Elevation 2). ft
Permanent Pool Elevation 2.en%, ft
Temporary Pool Elevation Z 90. 3 ft
areas
Permanent Pool Surface Area �'� 1� ] sq ft
Drainage Area ac
Impervious Area 0• 73 ac
volumev
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA1
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
Fonn S WU-102 Rev 3 99
% cu ft
_ U)354 _ cu ft
V / cu ft
(floor of the bavin)
(elevation of the orifice)
(elevation o, the discharge Structure overflow)
(water surface area at the orifice elevation)
(on -site and off -title drainage to the basin)
(on -Site and off -Site drainage to the basin)
(combined vohtin e of main basin and Joi ebay)
(volume detained above the permanent pool)
(approximately 20% of total volume)
(surface area to drainage area ratio from DWQ table)
D, ,5 in (2 to S day temporary pool draw -down required)
in
90 % (minimum 85% required)
Page 1 of 4

r s .
Footnotes
When using the Division SA/DA tables, the correct SA/DA ratio for permanent 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
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal
II. 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
M- A- a The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet)
Ar b The forebay volume is approximately equal to 20% of the basin volume
V� � �'c c The temporary pool controls runoff from the design storm event
d The temporary pool draws down in 2 to 5 days
N� _ e If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
M t f
The basin length to width ratio is greater than 3 1
Nei Ar g
The basin side slopes above the permanent pool are no steeper than 3 1
NL L _ h
A submerged and vegetated perimeter shelf with a slope of 6 1 or less (show detail)
M"CA~ _ i
Vegetative cover above the permanent pool elevation is specified
^-Mr T ]
A trash rack or similar device is provided for both the overflow and orifice
e k
A recorded drainage easement is provided for each basin including access to nearest right-
of-way
_ PNtA 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
11hft _ m A mechanism is specified which will drain the basin for maintenance or an emergency
III. 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)
This system (check one)
0 does oes not
0 does 4oes not
incorporate a vegetated fdter at the outlet.
incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3 99 Page 2 of

Maintenance activities shall be performed as follows
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
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
Inspect and repair the collection system (i a 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 feet in the main pond, the sediment shall be removed
When the permanent pool depth reads 2.62- feet in the forebay, the sediment shall be removed
BASIN DIAGRAM �{0
Gill in the 6lcrnks) ,��'"
k2
57
V Permanent Pool Elevation Zy.
Sedimen7Rei oval El V. p %� 75 o 'ZI. I
-------------- -- Sediment Removal Elevatioii-i+' -9413 75%
BOt'0ll] ElC dtlOn 1.O °Io -----------------------------------------------n_--
Bottorn Elevation Z i. O 25 /o
FOREBAY 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
6 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 4

A
7 All components of the wet detention basin system shall be maintained in good working order
1 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 name A Aggy A.44 1,j i� Tc2� G>til
Title E u l C-,F— T''IZ rSti taC—ram"
Address A LMADckI CsP:Re S5, WA)C 92!A1 9.S�►L, c-A 9 SI 116
Phon
Sign
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, a Notary Public for the State of ,
County of , do hereby certify that
personally appeared before me this day of , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements Witness my hand and official seal,
SEAL
My commission expires
See A+lachzd G?r-Gfica4e,
Form SW U-102 Rev 3 99 Page 4 of 4

CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT
State of Californniia,-,
County of L2,rilQ Clam ss
On q `Z q—CXA , before me,
Date m�andlTitle of Offi (e g Jane Notary Public }
personally appeared W Ann T� �
%personally known to me
—evell
to be the persol whose nameog ll
MARYMAll subscribed to the within instrument and
Coraaynisisl)n 1
IfblarY PubNc • C�anwildo acknowledged to me that del he rl Y executed
Santo Claraeounly the same in er Wr authorized
MyComrn EVhwJan20,2l capacity(i�6)r and that by er tl�+e(r
signatureO on the instrument the person(¢, or
the entity upon behalf of which the person(,'
acted, executed the instrument
WITNESS my hand and icial seal,
✓
Place Notary Seal Above
SI ure of Not ubllc
OPTIONAL
Though the information below is not required by law it may prove valuable to persons relying on the document
and could prevent fraudulent removal and reattachment of this form to another document
Description of Attached Docu en
'n
Title or Type of Document h,
A
Document
L
4
Date —on date
Number of Pages
Signer(s) Other Than Named Above
l �t"f TLT
Capacity(ies) Claimed by Signer
Signer's Name
❑ Individual
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❑ Corporate Officer — Title(s)
❑ Partner — ❑ Limited ❑ General
❑ Attorney in Fact
❑ Trustee
❑ Guardian or Conservator
❑ Other
Signer Is Representing
0 1999 Wilmot Notary Ass ailon l De Sato Ave Po Box 2402 Chatsworth CA 91313 2402 w natinnelootery org Prod No W7 Reorder Call Toll Free 1 800 876-827

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