HomeMy WebLinkAboutSW8031024_CURRENT PERMIT_20031231STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW-0IO�`t
DOC TYPE
� CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
�GYJ'�,loZ �jr
YYYYMMDD
t
OF WAPFy Michael F. Easley, Governor
�a p William G. Ross Jr., Secretary
�Q North Carolina Department of Environment and Natural Resources
v�
> Alan W. Klimek, P.E.,Director
0 Division of Water Quality
Coleen N. Sullins, Deputy Director
Division of Water Quality
December 31, 2003
Mr. Jeffrey L. Zimmer
Zimmer Development Co
1 l I Princess Street
Wilmington, NC 28401
Subject: Permit No. SW8 031024
Eckerd Store # 1154R
High Density Stormwater Project
New Hanover County
Dear Mr. Zimmer: -
The Wilmington Regional Office received a complete Stormwater Management Permit Application for
Eckerd Store #1154R on December 29, 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 031024 dated December 31, 2003, for the construction of
Eckerd Store 41154R.
This permit shall be effective from the date of issuance until December 31, 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/Ism: ' S:1WQSISTORMWATIPERMIT1031024.dec03
cc: Jeff Wehling
New Hanover County Building Inspections
Beth E. Wetherill, New Hanover County Engineering
Laurie Munn
Wilmington Regional Office
Central Files
�r
N. C. Division or Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service
Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 NCDEN,
ar
State Stormwater Management Systerns
Permit No. SW8 031024
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
Zimmer Development Co.
Eckerd Store # 1154R
New Hanover County
FOR THE
construction, operation and maintenance of 2 infiltration trenches 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 31, 2013, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
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 59,281 square feet of impervious area. This
system must be operated with a 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. 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.
2
State Stormwater Management Systems
Permit No. SW8 031024
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Eckerd Store #1154R
Permit Number:
SW8 031024
Location:
New Hanover County
Applicant:
Jeffrey L. Zimmer
Mailing Address:
Zimmer Development
Co.
111 Princess Street
Wilmington, NC 28401
Application Date:
December 29, 2003
Receiving Stream/River Basin/index #:
Hewletts Creek / Cape Fear 1 18-87-26
Classification of Water Body:
"SA HQW"
Trench No.:
Trench 1
Trench 2
Trench Dimensions, LxWxH,feet:
471 x 12 x 2.5
117 x 12 x 2.5
Trench Bottom Elevation, FMSL:
35.0
35.0
Drainage Area, acres:
1.34
0.38
Total Impervious Surfaces, ft2:
46,995
12,286
Offsite Area entering Pond, ftZ:
none per Engineer
Required Storage Volume, ft3:
6,159
1,642
Provided Storage Volume, ft3:
6,539
1,748
Bypass Elevation, FMSL:
37.50
37.50
Controlling Orifice:
overflow by-pass to 50
ft vegetated filter
Type of Soil:
Baymeade fine sand
Baymeade fine sand
Seasonal High Water Table:
33.0
33.0
Expected Infiltration Rate:
90 in/hr
90 inlhr
Time to draw down, hours:
0.15
0.16
3
ti
State Stormwater Management Systems
Permit No. S W 8 031024
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. 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. Decorative spray fountains will not be allowed in the stormwater treatment system.
6. 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.
7. 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.
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. 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. _.
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.
4
State Stormwater Management Systems
Permit No. SW$ 031024
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 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. If the proposed BUA exceeds
the amount permitted under this permit, a modification to the permit must be submitted
and approved 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 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 pen -nit 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 owership, 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 pennittee is responsible
for compliance with all permit conditions until such time as the Division approves the
transfer request.
2. FaiIure 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.
State Stormwater Management Systems
Permit No. SWS 031024
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 31 st day of December 2003.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.., Director
Division of Water Quality
By Authority of the Environmental Management Commission
2
State Stormwater Management Systems
Permit No. SW8 031024
Eckerd Store # 1154R
Stormwater Permit No. SW8 031024
New Hanover County
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 project,
(Project)
for (Project Owner) hereby state that, to the best of
my abilities, due care and diligence was used in the observation of the project construction such
that the construction was observed to be built within substantial compliance and intent of the
approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
7
State Stormwater Management Systems
Permit No. SW8 031024
Certification Requirements:
1. The drainage area to the system contains approximately the permitted acreage.
i
2. The drainage area to the system contains no more than the permitted amount of
built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff
drains to the system.
4. The outlet bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
7. All slopes are grassed with permanent vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-circuiting of
the system.
s
10. The permitted amounts of surface area.and/or volume have been provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
New Hanover County Building Inspections
9
OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
I
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
1. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Zimmer Development Co. __..__ .�...�..._
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Jeffrey L. Zimmer
3. Mailing Address for person listed in item 2 above:
111 Princess St.
City: Wilmington State: NC Zip: 28401
Telephone Number: —
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications. letters, operation and maintenance agreements, etc.):
Eckerd (store #1154R)
5. Location of Project (street address):
4502 Shipyard Blvd.
City: Wilmington
County: New Hanover
6. Directions to project (from nearest major intersection):
588' south of the intersection of Shipyard Boulevard (SR 1101)
and S. College Boulevard (NC Hwy. 132)
7. Latitude: 34N 1 2' 00" Longitude: 77W 53' 21 " of project
8. Contact person who can answer questions about the project:
Name:__ Monte Rosenberger Telephone Number: ( 910 ) 7 6 3 - 4 4 6 9
II. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form 5WU-101 Version 3.99 Page 1 of
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number _ n/a and its issue date (if known) n/a
3. Specify the type of project (check one):
Low Density High Density xRedevelop 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.
Infiltration trench
2. Stormwater runoff from this project drains to the Cape Fear _ River basin.
3. Total Project Area: 2.63 acres 4. Project Built Upon Area: 52 %
5. Flow many drainage areas does the project have? 3
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
Hewletts Creek
Hewletts Creek
Receiving Stream Class
SA; HQW
SA; HQW
Drainage Area
58,443 sf/1.34 ac
16,553 sf/0.38 ac
Existing Impervious* Area
38,656 s f/ 0 .8 8 ac
6, 7 6 8� s f/ 0. 1 6 ac
Proposedlmpervious*Area
46,995 sf/1 .08 ac
12,286 sf/0.28 ac
Impervious* Area (total)
7 9 %
21 %
Impervious` Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
13,824 s f/ 0. 3 2 ac
0
On -site Streets
0
0
On -site Parking
31,317 sf/0.72 ac
11,688 sf/0.26 ac
On -site Sidewalks
1,854 sf/0.04 ac
598 sf/0.02 ac
Other on -site
0
0
Off -site
0
0
Total: 46.995 sf 1 08 ac
Total:12 286 sf/0.28 ac
* Impervious area is defined as the built upon area including, but not limited to, buildings. roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4
7. How was the off -site impervious area listed above derived?
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. 'No more than 6 0, 2 8 5 - 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 filed in, piped, or altered except as necessary to provide driveway crossings.
4. Built- upon area in excess of the permitted amount requires a state storm water management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted storm water 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.
In • Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of Stormwater treatment/management
• Two copies of plans and specifications, including:
Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and Stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): Michael Newman, PE (PM Engineering, Inc. )
Mailing Address: 4601 Charlotte Park Dr., Suite 160 T
City: Charlotte State: NC Zip:
28217
Phone: ( —_ 704 ) 521— 9 9 7 3Fax: ( 7 QI ) 5 21= 9 9 7 4
VIII. APPLICANT'S CERTIFICATION
I, (print or type name ofperson listed in General Information, item 2k
certify that the information included on this permit application form is, to thehest 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 21-1.1000. n n / n
Date: / D ' 3 0
Form SWU-101 Version 3.99 Page 4 of 4
_..SHIPYARD HOUL'EVARD Ilbl
1
-- — — —
—
13
n
_
-
. r
f I'
u
1l HASIN'Nft 2
1
e
,
1
i
1
{
_
r
E
1
I
� � // / yO. Gam✓ /J
ti
S,. 1
G.
J
may" /
/' y 911� C'r y / r / • / /
SITE \
a 1
VICINITY MAPwn
BEFORE COI, OIC.....
114. co,ller pw<1R C—, I:
W 11 R_ re.. Tw Olb
100014941
PgMCT:
51011E 9BM
M
11X rum 85 W.mcw.
IEw --W.CUw Tr ,CtW. wC
EM
zimm 11
bEVE1 PFAENT CD.
Itl VMxCE15 SIR££1
1'0.1JINGtpN, XC �e.9,
(919} 16]-1169
o,c w.X1 : r�nu.vc
1)RAINAGE
BAST NS
MAP
DB1
Permit No. __)�,R63 f'Oa'!
(to be provided fry DWG s
State of North Carolina
Department of Environment and Natural Resources
Division of Water -Quality
STOR1v1WATER NIANAGENiENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION- TRENCH SUPPLEMENT
This form may be photocopied for use as an original.
DW Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing ail stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : $Qkard, . Shipyard Blvd. & NC Hwy. 132, Wilmington, - NC
Contact Person: . Mr. Monte Rosenberger Phone Number: (910) 763-4469 _
For projects with multiple infiltration systems, a supplement form must be completed foi each system. This* -
worlcsheet applies to: Trench Grading in Drainage Area Basin No. 1 ( see drainage Ma-p)
(from plans) . (ftom Form SWU-101)
II. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type Ba
Infiltration Rate 9-0 0or cfihr/sf (circle appropriate units)
SHWT Elevation 33 :-fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume 6159 c.f.
Design Storm ^ 1 .5 inch event (1-5 inch event for SA waters, 1 inch event for others)
Drawdown Time 0.006 days
Perforated Pipe Size 24 inch diameter
Perforated Pipe Length 471 f[:
No. Observation Wells (may be required on a case -by -case basis)
Stone Type (if used) # 57 washed
Stone Void Ratio 40%
Trench Elevations (in feet mean sea level)
Bottom Elevation 35 fmsl
Storage/Overflow Elevation 37.50 fmsl
Form S W U- l o7 Rev 3.99 Page 1 of 4
Trench Dimensions
Height 2 5 ft. Length 4-71 ft.
Width IZ ft. Volume Provided G5.39 cu.ft.
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, November 1995) 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
a.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
b.
System is located at least 100 feet from water supply wells.
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.
e.
Off-line system, runoff in excess of the design volume bypasses the system (bypass detail
/
provided).
rf.
System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
,J
r g.
Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
h.
System is not sited on or in fill material or DWQ approval has been obtained.
i.
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.
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.
k.
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.
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 ).
m. Drainage area for the device is less than 5 acres.
n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
p. Sides of the infiltration trench are lined with geotextile fabric.
. Rock used is free of fines (washed stone) and has a large void ratio.
r. Side to bottom area ratio is less than 4:1.
Form SWU-107 Rev 3.99 Page 2 of 4
{ 4 �_..
�5,��'- -,��
... ; . .,
s. Observation well(s) are provided (case -by -case basis).
t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters)
and detail is shown on plans.
� u• A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to 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.
4. The water level in any monitoring wells will be recorded after a I inch rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced 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.
6. Remove accumulated sediment from the infiltration system annually or when depth in the 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 infiltration system. 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 depth at the benchmark reads 3(OT5, the accumulated sediment shall be removed
from the system.
Form S W U- l07 Rev 3.99 Page 3 of 4
I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater
collection system in accordance with the six 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 andTltle:�-�rt!N L, 7_,Mn fr- LLC Adrnj giSfrify/
Address: / 11 Pt nC[ SS S e��- W 1 �rl inG�n, Nc 2134bl
Phone: Date: Date: 10
Signa
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.
1, �GOJO C , a Notary Public for the State of �h County of
e✓ , do hereby certify that �- T personally appeared before me this
day of(Y. GY,✓ Zoo -�) and acknowledge the due execution of the forgoing infiltration basin maintenance
requirements. Witness m Wj end official seal,
08k:'NpY A s3 Y'•
2•'. p U
1&�
My commission expiresy`1
Fomi S W U-107 Rev 3.99 Page 4 of 4
Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality _•
STORMWATER v1ANAGEME'VT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEM[ENT
This farm may be photocopied for use as an original
DWQ Stor_mwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMAATION
Project Name : _Bckerd , Shipyard Blvd. and NC Hwy. 132, _ Wilmington, NC
Contact Person: Mr. Monte Rosenberger Phone Number: 910 763-4469
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench Grading in Drainage Area Basin No. 2 ( see drainage map)
(from plates) (from Form SWU-101)
H. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil borings) .
Soil Type Be
Infiltration Rate ' 9 0 in/hr or cVhr/sf (circle appropriate units)
SHWT Elevation. 33 fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume
Design Storm r
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No. Observation WeLls
Stone Type (if used)
Stone Void Ratio
1 642 c f
,1 inch event (1.5 inch event for SA waters, I inch event for others)
_ 0. 0 0 7 _days
30 inch diameter
117 ft.
(may be required on a case -by -case basis)
#51 washed
40%
Trench Elevations (in feet mean sea level)
Bottom Elevation 35 fmsl
Storage/Overnow Elevation fmsl
Form SWU-!07 Rev 3.99 Page I of 4
Trench Dimensions
Height
Width
2.5 ft
I11. REQUIRED ITEMS CHECKLIST
Length
Volume Provided
1 f -7 ft.
-7 48 cu. ft.
The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C.
Department of Environment, Health and Natural Resources, November 1995) 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 In' ials
a.
b.
c.
d.
e.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
System is located at least 100 feet from water supply wells.
Bottom of system is at least 2 feet above the seasonal high water table.
Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
Off-line system, runoff in excess of the design volume bypasses the system (bypass detail
provided).
System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
h. System is not sited on or in fill material or DWQ approval has been obtained.
i. 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.
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.
k. 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.
r" 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters ).
m. Drainage area for the device is less than 5 acres.
n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
p. Sides of the infiltration trench are lined with geotextile fabric.
q. Rock used is free of fines (washed stone) and has a large void ratio.
Side to bottom area ratio is less than 4:1.
Form SWU-lo7 Rev 3.99 Page 2 of 4
Observation well(s) are provided (case -by -case basis).
Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters)
�/ / and detail is shown on plans. . f
t/ u. A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
3. Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to 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.
4. The water level'in any monitoring wells will be recorded after a I inch rainfall event and at least once a month.
Chronic high water table elevations (within l foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced 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.
6. Remove accumulated sediment from the infiltration system annually or when depth in the 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 infiltration system. 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 depth at the benchmark reads 5G,875 , the accumulated sediment shall he removed
from the system.
Fonn S W U-107 Rev 3.99 Page 3 of 4
I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater
collection system in accordance with the six 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.
Pri nt N
Addres
Phone:
Signatt
Note
been sold and a
resident of the subdivision has been named the president.
I, �e Wg� (:A , a Notary Public for the State of IV ( , County of
lW ✓ , do hereby certify that L i [ ✓ personally appeared before me this
day of and acknowle a the due execution of the forgoing infiltration basin maintenance
requirements. Witness my hand and official seal,
,`,�i�µt�u+uurrrrrrr�
CD .•'
r�
2. PUBLtiG'z':
` My commission expires �t fr 3 `
OVER
Form SWU-107 Rev 3.99 Page 4 of 4
I�f
07/18/2005
10:20 7045219974
PM ENGINEERING
�'■�■
LAN�7 pLANN�pS
■ •
PM
E
TNNspo rWnoW
INCORPORATED
PAGE 01/03
FAX
TO Rick Shiver Hate 7/18/05 No. 2003349.70
Company NCDENR
Fax No. No. of
910-350-2004 p$ es 3
From Michael Newman (McIudes Cover Sheet)
RE
Eckcrd #1154R
,Lfessage
Wilmington, NC
If you do not receive all pages of this transmission, or if any of the pages are not legible, plcasc notify us at once.
4601 CHARLOTTE PARK DRIVE, SliITE 160
CHARLOTTF, NC 28217
voice 704.521.9973
fax 704.521.9974
e7118i2005 10:20 7045219974
Eckerd Store #1154R
Stormwater Permit No. SW8 031024
New Hanover County
Designer's Certification
PM ENGINEERING
PAGE 02/03
State Storrr rater Managcment Systems
Permit No. SWS 031024
1, Michael. Newman _,as a duly registered engineer in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the
construction of the project,
Eckerd Store 11154R
(Project)
for Zimmer Development: Company _(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 28274
Date 7 / 1 8105
�0
SEAL
028274 =
7
07/18/2005 10:20 7045219974
PM ENGINEERING PAGE 03/03
State Stl rnwater Management Systems
Permit No. SW3.031024'
Certification Requirements:
x 1. The drainage area to the system contains approximately the permitted acreage.
IL_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.
2L__4. The outlet/bypass structure elevations are per the approved plan.
x S. The outlet structure is located per the approved plans.
n / a 6. Trash rack is provided on the outlet/bypass structure.
X 7. All slopes are grassed with permanent vegetation:
�8. Vegetated slopes are no steeper than 3 :1.
x__ _ 9. The inlets are located per the approved plans and do not cause short-circuiting of
. .. the system.
x_10. The.permitted amounts of surface area and/or volume have been provided_
x 11. Required drawdown devices are correctly sized per the approved plans.
,_12. All required design depths are provided.
x 13. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
x 14. The required system dimensions are provided per the approved plants.
cc: NCDENR-DWQ Regional Office
New Hanover County Building Inspections .. r
8