HomeMy WebLinkAboutSW8030405_CURRENT PERMIT_20030925STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW�(�'J
DOC TYPE
� CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD
OF W A r6y Michael F. Easley, Governor
p William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
c
Alan W. Klimek, P.E.,Director
0 Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
September 25, 2003
Mr. Dale Key
Medac Health Services, P.A.
3710 Shipyard Blvd.
Wilmington, NC 28403
Subject: Permit No. SW8 030405
Porters Neck Medac Health Services
High Density Stormwater Project
New Hanover County
Dear Mr. Key:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Porters Neck Medac Health Services on September 17, 2003. 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 030405 dated September 25, 2003, for the construction of Porters Neck Medac Health
Services.
This permit shall be effective from the date of issuance until September 25, 2013, 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
Laurie Munn. or me at (910) 395-3900.
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/:lsm S:IWQSISTORMWATTERMIT1030405.sept03
cc: C. Lawrence Sneeden, Jr., P.E.
New Hanover County Building Inspections
Beth E. Wetherill, New Hanover County Engineering
Laurie Munn
Wilmington Regional Office
Central Files
N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service — ?'
Wilmington Regional Office WiimingtoA� NC'28405 (910) 350-2004 Fax 1 800 623-77481GDEN
State Stormwater Management Systems
Permit No. SWS 030405
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
Medac Health Services, P.A.
Porters Neck Medac Health Services
New Hanover County
FOR THE
coustruc.tion, operation and maintenance of an infiltration basin and storage basin incompliance
with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules") and
the approved stormwater management plans and specification's 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 September 25, 2013, and shall be
subject to the following specified conditions and limitations:
I. 1i.1;4SfG3N 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 67,400 square feet of impervious area. A holding
basin has been designed to handle the runoff from 43,200 square feet of impervious area.
This volume of water will be pumped into the infiltration basin. The infiltration rate of
the infiltration basin must be greater than the pumping rate from the holding basin. This
pond and the storage basin must be operated with a 50' vegetated filter.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans.
4. AlI stormwater collection and treatment systems must be located in either dedicated
common areas or recorded casements. 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 ofthe approved drainage area.
2
State Stormwater Management Systems
Permit No. SNN18 030405
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Medac Health Services, P.A.
Permit Number:
SW8 030405
Location:
New Hanover County
Applicant:
Mr. Dale Key
Mailing Address:
Medac Health Services, P.A.
3710 Shipyard Blvd.
Wilmington, NC 28403
Application Date.
September 17, 2003
Receiving Stream/River Basin/Index #:
Cape Fear 1 Pages Creek 1 18-87-22
Classification of Water Body:
"SA"
Design Storm, inches:
1.5
Basin Identification
Basin 1, Infiltration Basin Basin 2 Storage Basin
Basin, Depth, feet:
2.0
4.0
Bottom Elevation, FMSL:
50.0
43.0
Drainage Area, acres:
2.13
1.54
Total Impervious Surfaces, ftz:
67,400
43,200
Offsite Area entering Pond, ftl,:
none
none
Required Storage Volume, ft':
8,200
5,460
Provided Storage Volume, ft':
8,720
5,470
Temporary Storage Elevation, FMSL:
51.5
45.6
Controlling Orifice:
bypass to 50'
bypass to 50'
veg. filter
veg. filter
Soil Type:
Sand
n/a
Seasonal High Water Table.
48.0
n/a
Expected Infiltration Rate:
33" per hour
n/a
Time to Draw Down, days:
0.07
1
(Draw Down < 5 days)
The runoff from Drainage Area 2 will drain by gravity through a piped system to an underground
lined storage basin, where it will be pumped via a 2" forcemain to the infiltration basin.
r
3
a
State Stormwater Management Systems
Permit No. SWS 030405
11. 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. ThQ 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.
C. Maintenance of all slopes in accordance with approved plans and specifications.
t: Debris removal and unclogging of outlet structure, orifice device, flow spreader,
catch basins and piping.
f A(,cess 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. Decorative spray fountains will not be allowed in the stormwater treatment system.
6. I'h: _facilities shall be constructed as shown on the approved plans. This permit shall
bl txonx, voidable unless the facilities are constructed in accordance with the conditions of
this; permit, the approved plans and specifications, and other supporting data.
7. Upon ,,ompletion 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
approptiate 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.
S. If the stormwater system was used as an Erosion Control device, it must be restored to
d,:,ign condition prior to operation as a stormwater treatment device, and prior to
occuptwcy of the facility.
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.
C. 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 flan approval or a CAMA.Major permit was
sought.
is Tilling in, altering, or piping of any vegetative conveyance shown on the approved
plan.
4
State Stormwater Management Systems
Pen -nit No. SW8 030405
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
Permittec for a minimum of ten years from the date of the completion of construction.
12. 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.
13. 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.
14. 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.
15. 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.
111. 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) 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 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..
r
State Stormwater Management Systems
Permit No. SNP S 030405
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.
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 25th day of September, 2003.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
6
State Stormwater Management Systems
Permit No. SWS 030405
Porters Neck Medac Health Services
Stormwater Permit No. SW8 030405
New Hanover 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:
MM_0
Signature
Registration Number
Date
State Stormwater Management Systems
Permit No. SW8 030405
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. The outlet/bypass structure elevations are per the approved plan.
S. 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.
S. 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.
µ12. 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
New Hanover County Building Inspections
8
A&K #02146
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc, who owns the project):
Medac Health Services, P.A.
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Dale Key, Administrator
3. Mailing Address for person listed in item 2 above:
3710 Shipyard Blvd._
City: Wilmington State: NC Zip: 28403
Telephone Number: (910) 452-1400
4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Porters Neck Medac Health Services
5. Location of Project (street address):
8115 Market Street
City: Wilmington County:
6. Directions to project (from nearest major intersection):
New Hanover
US Hwy. 17 North approximately 1,800 feet southwest of intersection with SR 1402 (Porters Neck
7. Latitude: N34° 17' 50"
Longitude: W770 47' 50"
of project
8. Contact person who can answer questions about the project:
Name: C. Lawrence Sneeden, Jr., P.E. Telephone Number: (910) 343-9653
If. PERMIT INFORMATION
Specify whether project is (check one)
X New
Form SWU-101 Version 3.99 Page 1 of 4
Renewal Modification
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
Existing permit number NIA And its issue date (if known) NIA
3. Specify the type of project (check one):
Low Density X 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
I 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.
Infiltration Basins
2. Stormwater runoff from this project drains to the Cape Fear River Basin.
3. Total Project Area: 3.97 AC 4. Project Built Upon Area: **69 %
5. How many drainage areas does the project have? 2
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 I
Drainage Area 2
Receiving Stream Name
Pages Creek
Pages Creek
Receiving Stream Class
SA
SA
Drainage Area
92,800 SF 12.13 AC
67,300 SF 1 1.54 AC
Existing Impervious * Area
0
0
Proposed Impervious* Area
67,400SF
43,200 SF
Impervious* Area (total)
73%
64%
Impervious* Surface Area
,, . Drainage;Area l-, -
;_ E- . Drainage Area 2 ;
On -site Buildings
13,500 SF
9,500 SF
On -site Streets
0
0
On -site Parking
47,900 SF
31,000 SF
On -site Sidewalks
6,000 SF
2,700 SF
Other on -site
0
0
Off -site
0
0
Total: 67,400 SF
Total: 43,200 SF
Impervious area is dejined as the hunt upon area including, but not limited to, buildings, roads, parking areas
sidewalks, gravel areas, etc.
**Includes 8,300 SF of Pavement Draining Off -Site REviy6o y'%Ic%7
Form SWU-101 Version 3.99 Page 2 of 4 e,4s
7. How was the off -site impervious area listed above derived? NIA
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.
The following covenants are intended to ensure ongoing compliance with state stormwater management permit
number NIA 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 NIA square feet of arty 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.
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 all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for
each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for
the status and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 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.
l . 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 we
One copy of the applicable supplement form(s) for each BMP aK-
Permit application processing fee of $420 (payable to NCDENR) lk l
Detailed narrative description of stormwater treatment / management ILL
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
- 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.
C. Lawrence Sneeden, Jr., P.E.
Designated agent (individual or firm): Andrew & Kuske Consulting Engineers, Inc.
Mailing Address:
902 Market Street
City: Wilmington State: NC
Phone: (910) 343-9653
VIII. APPLICANT'S CERTIFICATION
Fax: (910) 343-9604
Zip: 28401
1, (pant or type name of person listed in General Information, item 2) Dale Key, Administrator ,
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 I SA NCAC
2 H.1000.
Signature:
Form SWU-101 Version 3.99 Page 4 of 4
Date: Ski ?aa ^
A&K #02146
Permit No.
State of North Carolina (to be provided by DWQ)
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 application form, 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: Porters Neck Medac Health Services
Contact Person: C. Lawrence Sneeden, Jr., P.E. Phone Number: (910) 343-9653
This worksheet applies to: Basin No. 2 in Drainage Area 2
(as identified on plan) (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 (frnsl).
Soils Report Summary
Soil Type
Infiltration Rate
SHWT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
S P-S M
33 (:In/h or cf/hr/sf (circle appropriate units)
47-48 msl (Seasonal Nigh Water Table elevation)
1.5 inch (L S inch event for SA waters, 1 inch event for others)
5,460 c.f.
1 Days
45 ft. x 77 ft. = 3465 sq. ft (bottom dimensions)
5470 c.f.
43.0 fmsl
45.6 fmsl
47.0 fmsl
g-E%.(" rev sltG t/03
Form SWU-103 Version 3.99 Page 1 of 3
Gc_ 5
III. 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
ec f a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
cc,/ b. System is located at least 100 feet from water supply wells.
C c/ c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
�cS e. System is not sited on or in fill material DWQ approval has been obtained.
w la cc/ 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.
C C/ g. Drainage area for the device is less than 5 acres.
C u h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
C c� 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 calculations attached.
C r/ j. System is sized to take into account the runoff at the ultimate built -out potential from all
cf surfaces draining to the system, including any off -site drainage. Calculations attached.
4'c.f k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
C �f 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swaie or
sediment trap is provided.
Gf 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
Ccf
Ce_-1
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
o. Flow distribution mechanism within the basin is provided.
Ce_,r p. A benchmark is provided to determine the sediment accumulation in the pretreatment
device.
C Lr q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
ce-/ 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.
CL f 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 Version 3.99 Page 2 of 3
*IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion,
trash accumulation, vegetative cover, and general condition.
Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow
vegetated cover to maintain a maximum height of six -inches, and remove trash as needed.
After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved
design specifications.
4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when
depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be
restored to the original design depth without over -excavating. Over -excavation 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.
L4
When the design depth reads 4&.-5-' feet in the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
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.
1 acknowledge and agree by my signature below that I am responsible for the performance of the five
maintenance procedures listed above. l 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: Dale Key, Administrator
Address: 3710 Shipyard Blvd. Wilmington, NC 28403
Phone: 910-452-1400 Date:
Signature:
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, ✓ rt n 9 v 03 c0 ✓( , a Notary Public for the State of Zr)e-1-4, %, no, County of
do hereby certify that %tea (� �� personally appeared before me this
27*-% day of f /(per _ 7 oQ3 , and acknowledge the due execution of the foregoing infiltration
basin maintenance requirements. Witness my hand and official seal. �,,���ti111tfp!!!llj��
SEAL comm ission ex ' es fI � 0CNCO
P ��u �.., 7 t Zb� j-$ �►��
Signature _ —� �O 0'1 AA } S
w *.too v
Form SWU-103 Version 3.99 Page 3 of 3 AU
'�',yAAvovE�```
A&K #02146
Permit No.
State of North Carolina (to be provided by DWQ)
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 application form, an
infiltration basin supplement for each system, design calculations, soils report and plans and
specifications showing all stormwater conveyances and system details.
1. PROJECT INFORMATION
Project Name:
Porters Neck Medac Health Services
Contact Person: C. Lawrence Sneeden, Jr., P.E. Phone Number: (910) 343-9653
This worksheet applies to: Basin No. 1 in Drainage Area 1
(as identified on plan) (from Dorm 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 (fmsl).
Soils Report Summary
Soil Type
Infiltration Rate
SHWT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
SP-SM
33 In/hr or cf/hr/sf (circle appropriate units)
47-48 fmsl (Seasonal High Water Table elevation)
1.5 inch
8,200 c.f.
0.07 Days
(1.5 inch event for SA waters, 1 inch event far others)
12
ft. x 304
8,720
c.f.
50.0
fmsl
51.5
fmsl
52.0
fmsl
Form SWU-103 Version 3.99 Page 1 of 3
ft. = 3,648 sq. ft (bottom dimensions)
M. 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
C L S a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
CG.f b. System is located at least 100 feet from water supply wells.
C c t c. Bottom of system is at least 2 feet above the seasonal high water table.
CZ- S d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
Lr e. System is not sited on or in fill material DWQ approval has been obtained.
£ 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.
C C P g. Drainage area for the device is less than 5 acres.
t_ f h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
Gc� 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 calculations attached.
j. System is sized to take into account the runoff at the ultimate built -out potential from all
c surfaces draining to the system, including any off -site drainage. Calculations attached.
C / 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 is provided.
C cf 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
Cal
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
o. Flow distribution mechanism within the basin is provided.
cc! p. A benchmark is provided to determine the sediment accumulation in the pretreatment
device.
CC/ q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
Cc- 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.
C 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 Version 3.99 Page 2 of 3
IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion,
trash accumulation, vegetative cover, and general condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow
vegetated cover to maintain a maximum height of six -inches, and remove trash as needed.
After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved
design specifications.
4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when
depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be
restored to the original design depth without over -excavating. Over -excavation 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 50.3 feet in the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
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.
1 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: Dale Key, Administrator
Address: 3710 Shipyard Blvd. Wilmington, NC 28403
Phone: 910-452-1400 Date:
Signature:
Note. The legally responsible party should not be a homeowners association unless more than SO% of the lots have been sold
and a resident of the subdivision has been named the president.
I V Ig n_Z /L( 0 ti el 10 VI-c , , a Notary Public for the State of A)o r*h �A re It A� . County of
� meo a,/.Q - , do hereby certify that �a te JL2 personally appeared before me this
�_ day of M A r Ci\ „ 9 0 0 and acknowledge the due execution of the foregoing infiltration
basin maintenance requirements. Witness my hand and official seal. �,,,��t�tttlfltN/ryjt
SEAL. My commission ex ' es Jo—l7 2066 _ �'� j�T►� ��+ 4
S ignature_ O OtAA j'
Form SWU-103 Version 3.99 Page 3 of 3
oYlCdre���'
f State Stormwater Management Systems
Permit No SW8 970616
TO: Linda Lewis, Environmental Engineer
NC DENR/Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
RE: Trolley Path Condos
New Hanover County, NC
NKT Project No. 04118
Engineer's Certification
1, J. Phillip Norris, P.E. , as a duly registered Professional Engineer in the State of
North Carolina, having been authorized to observe (periodically, week!),;' full Ome) the construction of the project,
Trolley Path Condos _ (Project)
for _ Live Oak Development Company (Project Owner) hereby state that, to the best of my abilities, due
care and diligence were 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.
Required items to be checked for this certification to be considered complete are on page 2 of this form.
Noted deviations from approved plans and specifications-
%
C IQ *1*s
JPN/asn ... • p` ESS%�j•�/�.
? %
1.
04118 02-14-45-s sw-cer1,
SEAL
Signature
/LLIP
Registration No.
Date February 14, 2005
cc: Tony Roberts, New Hanover County Building ]inspector
Dean Scarafoni 1 Live Oak Development Company
NORRIS, KUSKE &TUNSTALL
�;.. CONSULTING ENGINEERS, INC.
902 Market Street Wilmington, NC 28401.4733
(910) 343-9653 Phone (910) 343-9604 Fax
f
� >..
f Certification Requirements:
The drainage area to the system contains approximately the permitted acreage.
t3.2. The drainage area to the system contains no more than the permitted amount of built -upon area.
All the built -upon area associated with the project is graded such that the runoff drains to the
system.
G The outlet/bypass structure elevations are per the approved plan.
5 The outlet structure is located per the approved plans.
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.
The inlets are located per the approved plans and do not cause short-circuiting of the system.
The permitted amounts of surface area and/or volume have been provided.
Required drawdown devices are correctly sized per the approved plans.
All required design depths are provided.
All required parts of the system are provided, such as vegetated shelf, and a forebay.
The overall dimensions of the system, as shown on the approved plans, are provided.
cc: Tony Roberts, New Hanover County Building Inspector
Dean Scarafoni / Live Oak Development Company
* Some areas agreed upon with NC DENR are steeper than 3:1.
NORRIS, KUSKE&TUNSTALL
CONSULTING ENGINEERS, INC.
902 Market Street Wilmington, NC 28401-4733
(910) 343-9653 Phone (910) 343-9604 Fax
NORRIS, KUSKE & TUNSTALL J. Phillip Norris, P.E.
John S. Tunstall, P.E. John A. Kuske, III, P.E.
CONSULTING ENGINEERS, INC. JamesT. Pyrtle, P.E. J.A. Kuske, P.E.
902 Market Street • Wilmington, NC 28401-4733 • Phone (910) 343-9653 • Fax (910) 343-9604
E-Mail: office@nkteng.com
LETTER OF TRANSMITTAL
To: Linda Lewis
Data: February 25, 2005 Job No. 04118
NC DENR - Wilmington
subject: Trolley Path Condos
SW Permit No. SW8 970616
New Hanover County
WE ARE SENDING YOU VIA HAND DELIVER
® ATTACHED ❑ UNDER SEPARATE COVER
❑ SHOP DRAWINGS ❑ PRINTS ❑ TRACINGS
❑ SPECIFICATIONS ❑ DISKS ❑ COPY OF LETTER
❑
"FAX°. TRANSMITTAL :==NUMBER __-OFF PAGES-
:INCLUDING -THISTRANSMITTAL
_ =
Call 910-343-9653 if you have any ,difficulty'
recelvtng=this message
COPIES
DATE
NO.
DESCRIPTION
1
02-14-05
Copy of Page 1 of State Stormwater Certification
1
02-14-05
Original Page 2 of State Stormwater Certification
C
FEB
❑ AS REQUESTED
❑ FOR YOUR USE
❑ FOR REVIEW AND COMMENT ❑ FOR APPROVAL
❑ FOR BIOS DUE ❑ YOUR PRINTS LOANED TO US
REMARKS:
understand we did not initial the items on Page 2 of the certification. Sorry for the inconvience.
cc: Tony Roberts 1 NHC Bldg. Inspector (w11 Copy) SIGNED J. Phillip Norris, P.E., 1 asn
Dean Scarafoni (w/ 1 Copy)
CONFIDENTIAL AND PRIVILEGED: Information contained in this document is privileged and confidential, intended for the sole use of the
addressee. If you are not the addressee or the person responsible for delivering it to the addressee you are hereby notified that any dissemination,
distribution or copying of this document is strictly prohibited. If you have received this document in error please immediately notify the sender and
return to the address above.