SW8060112_Current Permit_20080911

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins Director
Division of Water Quality
September 11, 2008
Takeru Kamiyama
True Worid Marine, LLC
1145 Sensation Weigh
Beaufort, NC 28516
Subject: Approved Plan Revision
Lot 10 - Jarrett Bay Industrial Park
1401 Sensation Weigh, Beaufort, NC
Stormwater Project No. SW8 060112 Plan Revision
Carteret County
Dear Mr. Kamiyama:
On August 11, 2008, the Wilmington Regional Office received a plan revision for
Stormwater Management Permit Number SW8 060112. The revisions include removal of a
factory that was never built. The factory and asphalt parking area were eliminated but the
stormwater management system was installed. In lieu of a factory, a gravel parking lot was
installed, creating an open boat storage and maintenance area. Only the sales office part of
the original building was constructed. The overall built -upon impervious area remains
unchanged. It has been determined that a formal permit modification is not required for the
proposed changes. We are forwarding you an approved copy of the revised plans for your
files. Please add the attached plans to the previously approved plan sheets.
Please be aware that all terms and conditions of the permit issued on March 20, 2006
remain in full force and effect. Please also understand that the approval of this revision to the
approved plans for the subject State Stormwater Permit is done on a case -by -case basis. Any
other changes to this project must be submitted to and approved through the Division of Water
Quality prior to construction. The issuance of this plan revision does not preclude the
permittee from complying with all other applicable statutes, rules, regulations or ordinances
which may have jurisdiction over the proposed activity, and obtaining a permit or approval prior
to construction.
If you have any questions concerning this matter, please do not hesitate to call me at
[phone].
Sincerely,
Steve G. Pusey
Environmental Engineer
ENB1sgp: WQSISTORMWATERIPERMIT1060112PR.sep08
cc: Greg Walker - W. E.C., LLC, PO Box 1923, Pawleys Island, SC 29585
Carteret County Building Inspections
Steve Pusey
Wilmington Regional Office
Central Files N"o"�e Carolina
dvatura!!r�
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional Office Internet: www.ncwatercuality.org Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

Permit No. S W 8 ®(p Q 1 j Z
(to be provided by DWQ)
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
DWQ 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
Project Name: True World Marine -Lot 10 Jarrett Bay
Contact Person: Shane Lippard Phone Number: 910-251-8544
This worksheet applies to: Basin No. 1 in Drainage Area 1
(as identified on 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 Tomotley
Infiltration Rate 1 ft/hr - horizontal
hVhr or cVhr/sf (circle appropriate touts)
SHWT Elevation 2.5 finsl (Seasonal High Water Table Elevation)
Basin Design Parameters
Design Storm 1.5 in.(1.5 inch event for SA waters, I inch event for others)
Design Volume -2 cL 1 � q O 3 c.f.
Drawdown Time 5 days
Basin Dimensions -7D
`?oo
Basin Size -� ft. x -69-
Basin Volume Provided 24;25r 2 1 01 c.f.
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
Form SWU-103 Rev 3.99
4.5 finsl
6.0 fmsl
7.0 fmsl
Page 1 of 3
f 3 "05z-
ft. _�� sq.ft. (bottom dimensions)

ill. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(NC 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
[N)Sl, a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
JA)�L_ _ b. System is located at least 100 feet from water supply wells.
lA L. c. Bottom of system is at least 2 feet above the seasonal high water table.
V%L d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon
WNI_ e. System is not sited on or in fill material or DWQ approval has been obtained.
V.1L, 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.
URI g. Drainage area for the device is less than 5 acres.
LZ 1, 4it h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
lit— i. 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 calculation attached.
k%(., 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.
OIL k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap provided.
m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches
or dense vegetative cover is provided.
ALA 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).
LJSI., o. Flow distribution mechanism within the basin is proved
yJd(� p. A benchmark is provided to determine the sediment accumulation in the pretreatment
device.
tr, q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
r. 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.
s. 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.
Form 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 infiltratiord.
stem f
trash accumulation, vegetative cover, and general condition. �,+
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetativeen a 2006
Vegetated cover to maintain a maximum height of six inches, and remove trash as need
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 specification.
4. Remove accumulated sediment form 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 or stream, 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 I.1 feet in the pretreatment unit, the sediment shall be
removed form 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 Title: Mr. T akeru Kamiyama, President
Address: A.% {, t/v7" 070-7
Phone: 412 � 'r — !� Date: JF ,:,6
Signature: i
Note: The legally responsi le 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, PaAWCaS CA- la'M 11-4 j6l a 9, ,a Notary Public for the State of N-e w Q:2 JeSrzl f , County of
do hereby certify that TCLQ e p_U -kAk41%" personally appeared before me this
day of "E►QvA S3 , 7-0�)bj , and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness my hand and official seal,
SEAL My commission expires: Pone ^ to
Form SWU-103 Rev 3.99 Page 3 of 3
pRANCESCA BAUSTRIERI
NOTARY PUBLIC OF NEW JERSEY
My Commission Expires Nov10 W10