SW8031207_HISTORICAL FILE_20040518

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE
El CURRENT PERMIT
❑ APPROVED PLANS
I� HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
aqD�DS1Ff
YYYYMMDD

01
State Stormwater Management Systems
Permit No SW8 031207
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
Jonathan L Mason, White Oak, LLC, White Oak Apartments, LP
White Oak Apartments
New Hanover County
FOR THE
construction, operation and maintenance of a non -discharging infiltration basin 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 May 18, 2014, 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 83,195 square
feet of impervious area
3 The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans
4 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
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 A permit
modification must be submitted and approved prior to the construction of
additional built -upon area from outside of the approved drainage area
Page 2 of 8

+ State Stormwater Management Systems
Permit No SW8 031207
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name
White Oak Apartments
Permit Number
SW8 031209
Location
New Hanover County
Applicant
Jonathan L Mason, Member/Manager
Mailing Address
White Oak, LLC, General Partner
White Oak Appartments, LP
PO Box 10284
Wilmington, NC 28404
Application Date March 9, 2004
Receiving Stream/River Basin Pages Creek / Cape Fear
Stream Index Number CPF24 18-87-1-(1)
Classification of Water Body "SA"
Drainage Area, @cres
Onsite, f Z
Offsite, ft
Total Impervious Surfaces, ft2
Basin Depth, feet
TSS removal efficiency
Bottom Elevation, FMSL
Permitted Surface Area, ft2
Permitted Storage Volume, ft3
Temporary Storage Elevation, FMSL
Type of Soil
Expected Infiltration Rate, in/hr
Seasonal High Water Table Elev
Time to Draw down, hours
673
293,158
0
83,195
1 75
90% (no filter is required)
29
17,979@Bottom
36,036
3075
Fine -Medium Sand
07
27 0 FMSL
47
Page 3of8

State Stormwater Management Systems
Permit No SW8 031207
ll. SCHEDULE OF COMPLIANCE
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 Mowinq 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, flow spreader, catch
basins and piping
g Access to the infiltration basin and 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 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
6 Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation Any deviations from the
approved plans and specifications must be noted on the Certification A
modification may be required for those deviations
7 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 At least 30 days prior to the sale or lease of any portion of the property, the
permittee shall notify DWQ and provide the name, mailing address and phone
number of the purchaser or leasee 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 or lease of any portion of the
property
Page 4 of 8

State Stormwater Management Systems
Permit No SW8 031207
9 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, 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
Pilling
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 amount permitted under this permit, a modification to the
permit must be submitted and approved prior to construction
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 must maintain compliance with the proposed built -upon area and
ensure that the runoff from all the built -upon is directed into the permitted
system
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
14 The permittee must maintain the current permitted drainage area No additional
runoff from outside of the permitted drainage area boundary may enter the
permitted stormwater facilities without first applying for and receiving a permit
modification
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 The
dissolution of the limited partnership and/or limited liability company does not
preclude the permittee from complying with all permit conditions
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
Page 5of8

State Stormwater Management Systems
Permit No SW8 031207
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 during normal
business hours for the pur ose 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 any name, ownership or mailing address
changes within 30 days
Permit issued this the 18th day of May, 2004
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W Klime�'71—iirector
Z Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

�CF WA 7�9p Michael F Easley, Governor
William G Ross Jr, Secretary
S PA North Carolina Department of Environment and Natural Resources
> Alan W Klimek, P E ,Director
p -r Division of Water Quality
Coleen H Sullins, Deputy Director
Division of Water Quality
FAX COVER SHEET
Date:
February 16, 2004
To:
Phil Tripp, P E.
Company
Tripp Engineering
FAX #.
763-5631
No of Pages: 1AV
From: Linda Lewis
Water Quality Section - Stormwater
FAX # [phone]
Phone # [phone]
DWQ Stormwater Project Number SW8 031207
Project Name: White Oak Apartments
MESSAGE:
Dear Phil
The Division of Water Quality received a stormwater management permit application for
White Oak Apartments on December 3, 2003 The application is not complete at this
time Please submit the following items by March 16, 2004, to continue the review
1 The soils report only provides the current groundwater elevation at the time the
investigation was conducted This does not equate to the Seasonal High Water
Table, which the soils report prepared by S& ME indicates could be higher or
lower Please provide an accurate estimate of the SHWT elevation
2 The requirement for a vegetated filter is waived since the system provides
storage for over 3 times the minimum design storm volume of 10,449 cubic feet
Therefore, you need not initial item (n) on the supplement
3 Please show the proposed flow distribution system in the infiltration basin, as
indicated has been provided in item (o) of the supplement
4 Since Mr Mason has signed all the paperwork as "Jonathan L Mason", I have
revised the application to show his full name
5 Please dimension the building, parking, walks and access road
6 Please show the volume calculation The calculations indicate the volume is
determined by "LxWxD", but I think is for a trench system Please show all
calculations to support your conclusion that 36,036 cubic feet has been provided
RSSlarl S1WQSISTORMWATIADDINF0120041031207 feb04
N C. Division of Water Quality 127 Cardinal Drive Extension [phone]
Wilmington Regional Office Wilmington NC 28405 [phone] Fax
Customer Service
1 800 623-7748
X ��
ion
—Ni

f-"
* * * COMMUNICATION RESULT REPORT ( FEB 16 2004 11 37AM ) * * *
P 1
FILE MODE
247 MEMORY TX
J
OPTION
REASON FOR ERROR
E-1) HANG UP OR LINE FAIL
E-3) NO ANSWER
TTI NCDENR WIRO
ADDRESS (GROUP) RESULT PAGE
----------------------------------------------------
97635631 OK P 1-1
E-2) BUSY
E-4) NO FACSIMILE CONNECTION
Michael F. Easley, Govemor
W1Nlam C Ross Jr secretary
North Caroline Department of Environment and Natural i esoumes
FAX COVER SHEET
Date: February 16, 2004
To:, Phil Tripp, P.E.
Company: Tripp Engineering
FAX #: [phone]
Alan Al KlirneKt P,E ,Director
Dlvlsloil o water Qtaality
Golsen H Sullins, Deputy Q rector
Division of Water r uallty
No. of Pages: 1
From: Linda Lewis .�Av
Water Quality Section ^ Stormwater
FAX # [phone]
Phone # [phone]
DWQ Stormwater Project Number: SINS 031207
Project Name: White Oak Apartments
MESSAGE:
Dear Phil,
The Division of Water Quality received a stormwater management permit application for
White Oak Apartments on December 3, 2003, The application is not complete at this
time Please submit the following items by March 16, 2004, to continue the review -
I , The soils report only provides the current groundwater elevation at the time the
investigation was conducted. This does not equate to the Seasonal High Water
Table, which the soils report prepared by S& ME indicates could be higher or
lower Please omvide an nrrurate Qatirnata of thy, AHWT RlPvafinn

TRIPP ENGINEERING, P.C.
41 419 Che,,tnul Sheet
Wilmington, Noith Cmollna 28401
Phone [phone]'AX [phone]
March 9, 2004
NCDENR
Division Water Quality
127 Cardinal Dave
Wilmington, NC 28405-3845
Attn: Ms Linda Lewis
Re. White Oak Apartments
Project No. SW8 031207
TE 003084
Dear Linda
In response to your correspondence dated February 16, 2004, we offer the following
1 As per the site visit with Vincent Lewis October 6, 2003, the SHGWT was
determined at 5' from existing elevation (See enclosed letter dated October
7, 2003 )
2 A new page I and 2 of the infiltration basin supplement has been enclosed
3 A flow distribution system has been provided along with a detail
4 Thank you
5 Dimensions have been provided
6 A correct formula has been provided on the calculation sheet
Please review for approval and contact us with any questions, comments or if you
need additional information Thank you
Sincerely,
Tripp Engineering, P.C.
C;4�J�2�f�
Charles D Cazier, E.I
CDC dcb
Eric
too? 6 _ am

61
TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone [phone] • FAX [phone]
October 7, 2003
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn. Ms. Linda Lewis
Re- White Oak Development
New Hanover County, NC
TE 03084
Dear Linda
FOR L a 100
T met Vincent Lewis, Monday, October 6, 2003, on the above referenced site and
we put in three (3) observation holes We enclose and 8'hxl 1 portion of the survey along
with a vicinity map for your use We determined an area as outlined will be suitable for
infiltration with a seasonal high ground water table at 5' and an allowable trench bottom
at 3'
We will be submitting a plan in the near future including the design of an
infiltration system Please contact us with any questions, comments or if you need
additional information Thank you
Sincerely,
Ti
P1
PGT dcb
Eric
g, P C
P.E.
cc Vincent Lewis

I1
CA
mum
sfit

Dec 05 03 08:50a
Phillip Tripp
910-763-5631
P.1
0
Job No d'3"?
Date 12= c5'423
TRIPP ENGINEERING, P.C.
419 Chestnut Street Wilmington, NC 28401
Phone [phone] • FAX [phone]
Email trippeng@ec rr com
` LETTER OF TRANSMr TAL
To-'''+i2--- - -- - - - -
Attention
Subject In��j-1r fiL- �Y�1�C
�<AXTRANSMITTAL NUMBER OF PAGES INCLUDES COVER
I am sending you ( ) ATTACHED ( ) UNDER SEPARATE COVER
( ) Prints ( ) Tracings ( ) Copy of letter ( ) Specifications ( ) Other
Copies Item No- _-- - -- - - - Description _ ---
These are transmitted as Checked below
( ) For Approval ( ) For Your Use ( ) Sign & Return ( ) Review
Remarks _ 5E- - IkA&Lom -rgi5 1,4 kArro -rur- - -
cc
Signed C gPez----�

Dec 05 03 08:50a Phillip Tripp 910-763-5631 p.2
vn..-..�—r.s acr rrcvn*�onn wtLntNtri N IU-bIWzWUv5S9 PAGE 1/4
?Xf
Since 1973
December 4, 2003 AM Decades... Tkw Reasons
We listerre. Wir reapond ft solae
Wlute Oak Apartments, LP
Post Office Box 10284
Wilmington, North Carolina 29404
Attention Mr Jon Mason
Reference Double Ring ]hfiltrometer Tmng
White oak Apartments
Darden Road
Wilmington, North Carolina
Job No 1063-03-980
Dees I& Mason
As requested, S&MB personnel have recently conducted double-rmg mfiltrommer testing of the
surf cial sorts at the subject site at the approxmime locations shown m Figure I Specifically, our
representatives performed the following work items on December 3, 2003
1 Advanced one hand-augered boring near the infiitrometer test
location in order to visually classify the in -place soils
Conducted double -ring mfiltrometer testing at a depth of 12
inches below the existing ground swface Tius testing was
conducted in general accordance with American Society for
Testing and Materials (ASTM) procedure D-3385 entitled,
"Infiltration Rate of Soils in Field Using Double-Rsng
lnfzltrometer"
Based on our field classifications of the excavated soils as discussed in our November 19, 2003
letter, the in -place soils generally consisted of approximately 32 inches of silty sand with some
organics This upper soil layer was underlain by about 14 inches of silty sands or clayey sands
Slightly silty sands were then noted at a depot of approximately 46 inches and extended to the
completed boring depth of 52 inches below the adstimg ground surface Water was encountered in
the borehole on December 3, 2003, at a depth of 51 inches below the exrst,ng gro e
site water level will fluctuate %�
ower at other tunes of the year
J S&ME, tnc 1410j "9A44i
jl 6409 Amaterdom Way Build,% W 19101 7994938 fox
Wilmington Ni Ah Caiofino 28405 www.snwint tour
i may tx tugner or
2
5

Dec 05 03 08:51a Phillip Tripp
UGl.-10y-10.11 J I etl eNUJ 'U&MIJ WIL."INUTON
910-763-5631 p.3
ID,9107999988 PAGE 2/4
J
White Oak Apartments, LP
S&ME Job Number 1063-03-990
December 4, 2003
Page Two
The avemgc mfiltrauon rate at the test, locabon was approxunatcly b 0 inches per hour A suminmaty
of the field ten results is presented in Table 1.
S&ME appreciates the oppoitawty to provide our services dunng thus phase of the project Should
you have any questions after revicwing this letter, or if we can be of additional assistance, please do
not hesitate to contact its at your convcmcnce
Sincerely,
S&ME, INC.
C -i , A.J CI,..A-3r-
C Richard Connell, u
Senior Engineering Technician
Michael W Beheri, P E
Senior Geotechmcal Engineer
CRC hmvjjns
AVKIU U
Fax Tnpp Engtneertag, Mr Phil Tnpp, P E

Dec 05 03 08:51a Phillip Tripp
OCC-04--03 11 2e FROM 5814E WILMINGTON
910-763-5631 p.4
1O 9107989958 PAGE 3/9
TABLE 1
Doublc Ring Inf Itrometer Testing
Wh1tt Oak ApartMemts
Darden Road
Wilmmgtor , North Cvolma
Job No 1063-03-990
Date of Test December 3, 2003
Depth of Test Below Site Cwade 121nches
Depth of Water in Rings 5 5 incites
Inner Diameter of Inner Ring 11'/. inches
Inner Diameter of Outer Ring 22% inches
Depth to Watcr 5 l inches
Average Infiltration Rate_ 6 0 incim per hour
SOIL PROFILE
D§Zh
Ho
V
1 Des
0-32"
2 5 Y
2 5/1
Black Fine to Medimn SAND - Some Silt with Organics
32"-"'t
2 5 Y
3/1
Very Dark Gray Fine to Medium SAND - Some Silt and City
46 "-52"
2 5 Y
32
Very Dark Grayish Brown Fine to Medtturl SAND - Tmee of
Silt