SW8080823_CURRENT PERMIT_20081013

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 0$ OSS 23
DOC TYPE]
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
looc61 o l,S
YYYYMMDD

F VINA
�� 90
Michael F Easley, Governor
7 William G Ross Jr., Secretary
O t— North Carolina Department of Environment and Natural Resources
1 �
O C Coleco H Sullins Director
Division of Water Quality
October 13, 2008
Ken and Lisa Shipp, Owners
283 Pearson Circle
Newport, NC 28570
Subject: State Stormwater Management Permit No. SW8 080823
Ken and Lisa Shipp "Site Improvements"
High Density Project
Carteret County
Dear Mr. and Mrs. Shipp:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for "Site Improvements" on October 9, 2008. 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 080823
dated October 13, 2008 for the construction of the subject project. ,
This permit shall be effective from the date of issuance until October 13, 2018, 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 Steve Pusey, or me at [phone].
W,4)a& 3eex-
and Beck
Regional Supervisor
Surface Water Protection Section
ENB/sgp: S:\WQS\STORMWATER\PERMIT\080823.oct08
cc: David K. Newsom, PE - Crystal Coast Engineering, PA
Carteret County Building Inspections
Steve Pusey
Wilmington Regional Office
Central Files
N"o�yn Carolina
�vafurglly
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone]
Wilmington Regional Office Internet: wwvncwaterquahtvore Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50%Recycled/10% Post Consumer Paper
Customer Service
1-877-623-6748

State Stormwater Management Systems
Permit No. SW8 080823
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY COMMERCIAL 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
Ken and Lisa Shipp
"Site Improvements"
NC Hwy 24, Morehead Township, Carteret County
701:i1aq
construction, operation, and maintenance of two (2) underground infiltration trenches
and one (1) wet storage basin in compliance with the provisions of 15A NCAC 2H .1000
(hereafter referred to as the "stormwater rules') and the approved stormwater
management plans and specifications and other supporting data as attached and on file
with and approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until October 13, 2018, 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.
This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.7 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 104,840 square feet of
impervious area.
This basin and trench system must be operated with a 50' vegetated filter.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans.
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.
6. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 080823
7. The following design criteria have been permitted for the infiltration trenches and
must be provided and maintained at design condition:
Trench
Trench 2
a.
Drainage Area, acres:
3.925
Onsite, ft2:
170,972
Offsite, ft2:
0
b.
Total Impervious Surfaces, ft2:
104,840
Onsite, ft2:
104,840
c.
Design Storm, inches:
1.5"
d.
Bottom elevation, FMSL:
24.5
e.
Bypass weir elevation, FMSL (basin):
26.5
f.
Permitted Storage Volume, ft3 (basin):
13,650
g.
Pre -development 1-yr., 24-hr. peak flow, cfs:
0.38
h.
Post -development 1-yr., 24-hr. peak flow, cfs:
0.37
i.
Type of soil:
Sandy to Sandy Loam
j.
Expected Infiltration Rate, in./hr.:
6
k.
Required Infiltration Pump Rate:
113.75 cfh (14.22 gpm)
(for < 5-day drawdown period)
I.
Required infiltration area, ft2:
114 114
m.
Provided infiltration area (Infiltrator units), ft2:
142 142
[ADS "Biodiffuser' plastic leaching chambers
(high capacity 16" H-10) or equal]
(8 units per trench x 17.75 sf per unit)
n.
SHWT, FMSL:
23.0
o.
Time to draw down, days:
< 5 days
p.
Receiving Stream / River Basin:
LIT Broad Creek
q.
Stream Index Number:
20-36-7
r.
Classification of Water Body:
SA; HQW
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowin.9 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 bypass structure, infiltration media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass 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.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 080823
5. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data.
6. 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.
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.
8. Access to the stormwater facilities shall be maintained via appropriate recorded
easements at all times.
The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
10. Prior to the construction of any permitted future areas shown on the approved
plans, the permittee shall submit final site layout and grading plans to the
Division for approval.
11. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times. At the time the permit is transferred to a new owner,
the permittee shall forward the approved plans to the new owner.
12. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 080823
III. GENERAL CONDITIONS
This permit is not transferable to any person or entity 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 completed Name/Ownership Change form
to the Division of Water Quality, signed by both parties, and accompanied by the
supporting documentation as listed on page 2 of the form. The approval of this
request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves the transfer request.
3. 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.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. 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.
6. 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.
7. The permit remains in force and effect until modified, revoked, terminated, or
renewed. The permit may be modified, revoked and reissued or terminated for
cause. The filing of a request for a permit modification, revocation and
reissuance, renewal or termination does not stay any permit condition.
8. 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.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
11. The permittee shall submit a permit renewal application at least 180 days prior to
the expiration date of this permit. The renewal request must include the
appropriate documentation and the processing fee.
Permit issued this fty 3th day of October, 2008.
INA E VIRONMENTAL MANAGEMENT COMMISSION
. Goi�x'
Jor uoieen H. Z5unins, Uirector
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

Permit Number: J �a �0 v a U3
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC, 1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element
Potentialproblem:
How I will remediate theproblem:
The entire filter strip
Trash/debris is present.
Remove the trash/debris.
system
The flow splitter device
The flow splitter device is
Unclog the conveyance and dispose
(if applicable)
clogged.
of any sediment off -site.
The flow splitter device is
Make any necessary repairs or
damaged.
replace if damage is too large for
repair.
Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 Of 3
4

BMP element:
Potentialproblem:
How I will remediate theproblem:
The swale and the level
The swale is clogged with
Remove the sediment and dispose
lip
sediment.
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and
bypassed it.
water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslo e of the level lip.
The bypass channel
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is
Study the site to see if a larger
damaged or ripap is rolling
bypass channel is needed (enlarge if
downhill.
necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
Maintain grass at a height of
if applicable).
approximately three to six inches.
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on
Remove the sediment and
the filter strip.
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is
Remove vegetation by hand if
choking out desirable species.
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality local Regional Office, or the
outlet.
401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3

Permit Number: J�` 3
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name: Ken and Lisa Shipp Property Improvements
BMP drainage area number:
Print
Title:_T_ttCirr VlC'](wa I
V v
Address:283 Pearson Circle - Newport, NC 28570
Date: 7 -n� g
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.
Q. /) I h k t h � -e 44 , a Notary Public for the State of
ND (Aaro I t V'Vz County of OY15 I O kA % do hereby certify that
LkS t personally appeared before me this a�2
day of pD , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
CEIIA J. C"NKINIIARD
Notary Public. North Carolina
Onslow, County
My Commission Expires
November 18, 2009
SEAL
My commission expires Noy-Cht h il/ l D" a 00 /
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3

Permit Number: ✓x?)fmt ��
(to be provided by DWQ)
Drainage Area Number:
Infiltration Trench/ Storage Basin System
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Infiltration Trench Section
Important maintenance procedures:
— The drainage area of the infiltration trench will be carefully managed to reduce
the sediment load to the sand filter.
— The water level in the monitoring wells will be recorded once a month and after
every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench will be inspected once a quarter and within 24 hours after every
storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of
operation and maintenance will be kept in a known set location and will be available
upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate the problenu.
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The grass filter strip or
Areas of bare soil and/or
Regrade the soil if necessary to
other pretreatment area
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment has accumulated to
Search for the source of the
a depth of greater than six
sediment and remedy the problem if
inches.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
The flow diversion
The structure is clogged.
Unclog the conveyance and dispose
structure (if applicable)
of any sediment off -site.
The structure is damaged.
Make any necessary repairs or
replace if damage is too large for
repair.
Form SW401-Infiltration Trench — Storage Basin System O&M-Rev.0
Page 1 of 5

BMP element:
Potentialproblem:
How I will remediate the problenc.
The trench
Water is ponding on the
Remove the accumulated sediment
surface for more than 24
from the infiltration system and
hours after a storm.
dispose in a location that will not
impact a stream or the BMP.
The depth in the trench is
Remove the accumulated sediment
reduced to 75% of the original
from the infiltration system and
design depth.
dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are
Remove the plants, preferably by
growing on the surface of the
hand. If pesticide is used, wipe it on
trench.
the plants rather than spraying.
The observation well(s)
The water table is within one
Contact the DWQ Stormwater Unit
foot of the bottom of the
immediately at 919-733-5083.
system for a period of three
consecutive months.
The outflow pipe is clogged.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged.
Repair or replace the pipe.
The emergency overflow
Erosion or other signs of
The emergency overflow berm will
berm
damage have occurred at the
be repaired or replaced if beyond
outlet.
The receiving water
Erosion or other signs of
-repair.
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Storage Basin Section
The storage basin system is defined as the storage basin, and pretreatment
including forebays, and the vegetated filter if one is provided.
This system (check one):
® does ❑ does not incorporate a vegetated filter at the outlet.
This system (check one):
® does ❑ does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
- Immediately after the storage basin is established, the plants on the perimeter of
the basin should be watered twice weekly if needed, until the plants become
established (commonly six weeks).
- No portion of the storage pond should be fertilized after the first initial
fertilization that is required to establish the plants.
- Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the storage basin.
Form SW401-Infiltration Trench -Storage Basin System O&M-Rev.0
Page 2 of 5

— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the storage pond is established, it should be inspected once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance should be kept in a known set location
and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
storage basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximatelysix inches.
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The main storage area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Infiltration Trench —Storage Basin System O&M-Rev.0
Page 3 of 5

BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The pump and
Clogging has occurred.
Clean out the pump, auxiliary
outlet structure
device, or piping. Dispose of the
sediment off -site.
The pump or auxiliary device
Repair or replace as necessary.
is damaged.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
Natural or synthetic
Leaks due to damage or
Repair or replace as necessary.
pond liner
defect.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the storage depth reads 2450 feet in the storage pond, the sediment shall
be removed.
STORAGE BASIN DIAGRAM
(fill in the blanks)
NOT
111CABLLE - Sediment -Removal. levation-34_60----------- Volume ---I---
Storage
Form SW40 I -Infiltration Trench — Storage Basin System O&M-Rev.0
Page 4 of 5
FW_

Permit Number: Sw�afr�8z ✓
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:Ken and Lisa Shipp Site Improvements
BMP drainage area number:
Print name:
Title: Ir ky % kX4 CbI.JYWA.i
Address:283 Peasron Circle - Newport, NC 28570
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. li ��1 a S -CA l VIZ h toe Q ra Notary Public for the State of
l�'tV> �t IvI I Yta , County of y\c,I f)lA / , do hereby certify that
Lk C 101--S..I L' p Ip personally appeared before me this
day of 6 (1.66-P�f- , A (}D!9�and acknowledge the due execution of the
forgoing infiltration trench / storage basin maintenance requirements. Witness my hand
and official seal,
CELIA J. CUNKINBEARD
Notary Public, North Carolina
Onslow County
My Commission Expires
November 18, 2009
SEAL
My commission expires Ow- w- ! D I
Form SW401-Infiltration Trench — Storage Basin System O&M-Rev.0
Page 5 of 5

0
DWQ USE ONLY
Date ReceivedFee PaidPermit Number
19- - 8' soS 0`90 sw�o�o�
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):
Ken and Lisa Shipp
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Ken and Lisa Shipp, Owner
3. Mailing Address for person listed in item 2 above:
City:Newport State:NC Zip:28570
Phone: (252 ) 447-6692 Fax:
Email: 10/4-
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Ken and Lisa Shipp Site Improvements
5. Location of Project (street address):
Off of NC HWY 24 in Broad Creek (across Broad/Gales Creek Fire Dpt.)
City:Morehead Township County:Carteret Zip:28570
6. Directions to project (from nearest major intersection):
--400 feet West of Hwy 24 and NC 1124 intersection, in Broad Creek
7. Latitude:34° 43' 30.80" N Longitude:76° 56' 16" W of project
8. Contact person who can answer questions about the project:
Name:David K. Newsom PE Telephone Number: (910 ) 325-0006
Email:crysta lcoastengQbizec.rr. com
II. PERMIT INFORMATION:
1. Specify whether project is (check one): ®New ❑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 and its issue date (if known)
3. Specify the type of project (check one):
❑Low Density ®High Density ❑Redevelop []General Permit ❑Universal SNIP ❑Other
4. Additional Project Requirements (check applicable blanks; information on required state permits can be
Form SWU-101 Version 03.27.08 Page 1 of 4

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other
4. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Stormwater
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.
All collected runoff emanating from impervious surfaces will be diverted to a storage basin and then pumped to
two infiltration beds. Stormwater flows in excess of 1 5" will be diverted to a vegetated filter prior to discharge to
2. Stormwater runoff from this project drains to the White Oak River basin.
3. Total Property Area: 3.925 acres 4. Total Wetlands Area: -0- acres
5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site)
6. Total Project Area**:3.925 acres 7. Project Built Upon Area:61.32 %
8. How many drainage areas does the project have?1
Q
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.
For hiEh density projects, com lete the table with one drainage area for each engineered stormwater device.
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
Broad Creek
Stream Class & Index No.
SA; HQW
Total Drainage Area (sf)
170,972
On -site Drainage Area (sf)
170,972
Off -site Drainage Area (sf)
0
Existing Impervious* Area (so
8,334
Proposed Impervious*Area (so
96,506
% Impervious* Area (total)
61.32
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings (sf)
existing: 7,236 / proposed: 17,000
On -site Streets (sf)
-0-
On-site Parking (sf)
61,616
On -site Sidewalks (sf)
existing: 1,098 / proposed: 5,650
Other on -site (so.;Z -1: ih> >r -
12,240
Off -site (sf)
-0-
Total (sf):
104,840
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 03.27.08 Page 2 of 4

*Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area
percentage calculation. This is the area used to calculate percent project built upon area (BUA).
10. How was the off -site impervious area listed above derived?N/A
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following 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. Forms can be
downloaded from http://h2o.enr.state.nc.us/su/bmp forms.htm - deed restrictions.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded deed restrictions and protective covenants for this
project shall include all the applicable items required in the above form, 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.
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms. Forms can be downloaded from http://h2o.enr.state.nc.us/su/bmp forms.htm.
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Form SW401-Permeable Pavement
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Permeable Pavement Supplement
Form SWU-I01 Version 03.27.08 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 Office. (Appropriate office may be found by locating project on the
interactive online map at http://h2o.enr.state.nc.us/su/msi maps.htm)
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
/Original and one copy of the Stormwater Management Permit Application Form
Original and one copy of the Deed Restrictions & Protective Covenants Form (if
required as per Part IV above) /
Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMPiW
Permit application processing fee of $505 (Express: 54,000 for HD, $2,000 for LD) /
payable to NCDENR (✓{/
Calculations & detailed narrative description of stormwater treatment/management
Copy of any applicable soils report
Two copies of plans and specifications (sealed, signed & dated), including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
✓9
I itials
- 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. (ex. designing engineer or firm)
Designated agent (individual or firm):Crystal Coast Engineering, PA
Mailing Address:3817-3 Freedom Way
City:Hubert State:NC Zip:28539
Phone: (910 ) 325-0006
Emai I: crys talcoa tengQbizec. rr. com
VIII. APPLICANT'S CERTIFICATION
Fax: (910 ) 325-0060
I, (print or type name of person listed in General Information, item 2) /(GyAfk_rllgi;J/ %�
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NT(` A (-1" 1 WA
Date:---) _Q �—_ 0 R
Form SWU-101 Version 03.27.08 Page 4 of 4

l
00-08
/.�
02 4 WnTFgOf
A
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must he completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
If PROJECT;INFORMATION't.'.:._4'r z _
Project name Ken and Lisa Shipp Property Improvements
Contact name David K. Newsom, PE - Crystal Coast Engineering, PA
Phone number (910)-325-0006
Date
Drainage area number
Type of BMP
Drawdown Flow from the BMP
Inflioation
NIA cis
For Level Spreaders Receiving Flow from the Drainage Area
Do not complete this section of the worksheet
Drainage area
h2
Do not complete this section of the worksheet.
Impervious surface area
ftz
Do not complete this section of the worksheet
Percent impervious
%
Do not complete this section of the worksheet.
Rational C coefficient
no not complete this section of the worksheet
Peak flow from the 1 infhr storm
cis
Do not complete this section of the worksheet
Time of concentration
min
Rainfall intensity, 10-yr storm
In/hr
Do not complete this section of the worksheet
Peak flow from the 10-yr storm
cis
Do not complete this section of the woffisheet
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
N
(Y or N)
To a mulched bioretentlon cell?
N
(Y or N)
To a wetland?
N
(Y or N)
To a filter strip or riparian buffer?
Y
(Y or N)
Please complete filter stop characterization below.
Other (specify)
Required Companion Vegetated Filter Strip
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
50.00
it
Width of dense ground cover
000
it
Width of wooded vegetation
0.00
it
Total width
50.00
it
Elevation at downslope base of level lip
25.75
fall
Elevation at lop of bank of the receiving water
26.00
fmsl
Slope (from level lip to to top of bank)
-0.50
%
OK
Are any draws present?
N
(Y or N)
OK
Level Spreader Design
Forebay surface area
sq it
No fombay is needed
Feet of level lip needed per cis
13
fticfS
Answer 'Y" to one of the following:
Length based on the 1 inlhr storm?
N
(Y or N)
Length based on the 10-yr storm?
Y
(Y or N)
Length based on the BMP discharge rate?
N
(Y or N)
Design flow
1.20
cis
Is a bypass device provided?
N
(Y or N)
A bypass device is not needed.
Forth SW401-1-eval Spreader, Filter Strip, Restored Riparian Buffer-Rev.5
Parts I. and II. Design Summary, page 1 of 2

i
Length of the level lip
Are level spreaders in series?
scour hole ft Level spreader may not be more than 130 feet long
N (Y or N)
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
N (Y or N)
Do not complete this section of the
worksheet.
N (Y or N)
Do not complete this section of the
worksheet.
Do not complete this section of the
worksheet.
ff
Do not complete this section of the
worksheet.
ff
Do not complete this section of the
worksheel
_ If
Do not complete this section of the
worksheet.
If
Do not complete this section of the
workshest.
cfs
Do not complete this section of the
worksheet.
M
i
B i
Do not complete this section of the worksheet
1
M
Fonn SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer -Rev 5 Pans I and 11 Design Summary, page 2 of 2

III' REQUIRED ITEMS CHECKLIST_
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result In a request for additional Information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
als Sheet No.
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (if applicable),
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
os�
2. Plan details It" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
- High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build -out.
3. Section view of the level spreader (1" = 20' or larger) shoving:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
—
4. A date -stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
q
r�
5. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
6. The
supporting calculations.
7. A copy of the signed and notarized operation and maintenance (08M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1

f. r
Permit
®"A STORMWATER MANAGEMENT PERMIT APPLICATION FORM
NCDENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
SGv BDra2 j
(to be provided by DWQ)
oc pWArFy
s
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
1'�PROJECT.INF.ORMATION - h: - : " -F.
Project name Ken and Lisa Shipp Property Improvements
Contact person David K. Newsom, PE - Crystal Coast Engineering, PA
Phone number (910}325-0006
Date 7/22/2009 (revised 1012108)
Drainage area number 1 - Infiltration System 1
Ill. DESIGN INFORMATION:' 7
Site Characteristics
Drainage area
85,486.00
ftz
Impervious area
52,420.00
fe
Percent impervious
61.3%
%
Design rainfall depth
1.50
in
Peak Flow Calculations
1-yr, 24-hr runoff depth
in
1-yr, 24-hr intensity
Whir
Pre -development 1-yr, 24-hr peak flow
ff3/sec
Post -development 1-yr, 24-hr peak flow
ft3/sec
Pre/Post 1-yr, 24-hr peak flow control
ft3/sec
Storage Volume: Non -SR Waters
Minimum volume required
it
Volume provided
ff3
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth
in
Pre -development 1-yr, 24-hr runoff
ft3
Post -development 1-yr, 24-hr runoff
ft3
Minimum volume required
ft 3
Volume provided
6,865.50
it'
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Trench Design Parameters
Drawdown time
Perforated pipe diameter
Perforated pipe length
Number of laterals
Stone type (if used)
Stone void ratio
Stone is free of fines?
med./fine sand
6.00 in/hr
22.50 fmsl
5.00
days OK
n/a
in
n/a
ft
2
n/a
n/a
n/a
(Y or N) OK
Form SW401-infiltration Trench-Rev.2 Parts I & II. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWQ)
III:` REQUIRED ITEMS CHECKLIST. ; e`=
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. H a
requirement has not been met, attach Justification.
Pagel Plan
Initials
Sheet No.
Sheet 2/6
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
- Trench dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
Sheet 5/6
2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing:
- Bypass structure,
- Maintenance access,
- Basin bottom dimensions,
- Basin cross-section with benchmark for sediment cleanout,
- Flow distribution detail for inflow,
- Vegetated filter, and
- Pretreatment device.
Sheet 5/6
3. Section view of the infiltration basin (1" = 20' or larger) showing:
- Pretreatment and treatment areas, and
�n
- Inlet and outlet structures.
Design Colic.
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
Soils Report
5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
Sheet 316
6. A construction sequence that shows how the infiltration basin will be protected from sediment until the
entire drainage area is stabilized.
Design Calc,
7. The supporting calculations.
0&M
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
N/A
9. A copy of the deed restrictions (if required).
Form SW401-Infiltration Trench-Rev.2 Part III. Required Items Checklist, Page 1 of 1

Permit No. -�iri
(to be provided by DWQ)
Trench Elevatlons
Bottom elevation
24.50
fmsl
OK
Storage/overflow elevation
25.93
fmsl
Top elevation
28.00
fmsl
Trench Dimensions
Length (long dimension)
25.00
ft
Width (short dimension)
5.67
ft
Height (depth)
2.50
ft
OK
Addiflo nal Information
Total runoff volume captured by trench
1.66
ac-in
OK
Length of vegetative filter for overflow
50.00
ft
OK
Number of observation wells
1
OK
Distance to structure
82.50
ft
OK
Distance from surface waters
—2200
ft
OK
Distance from water supply well(s)
none
It
OK
Separation from impervious soil layer
none
R
OK
Depth of naturally occuring soil above SHWT
4.00
ft
OK
Bottom covered with 4-in of clean sand?
y
(Y or N)
OK
Proposed drainage easement provided?
y
(Y or N)
OK
Capures all runoff at ultimate build -out?
y
(Y or N)
OK
Bypass provided for larger storms?
y
(Y or N)
OK
Trench wrapped with geotextile fabric?
n/a
_ (Y or N)
OK
Pretreatment device provided
y
Form SW4014nfiltrabon Trench-Rev.2 Parts I. & 11 Design Summary, Page 2 of 2

i
Permit No.
`
(to be provided by DWO)
,S_..
®N
ot0p WATfll G
NCDENR
o
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
1! PROJECT INFORMATION'.-.
Project name
Ken and Lisa Shipp Property Improvements
Contact person
David K. Newsom, PE - Crystal Coast Engineering, PA
Phone number
.(910)-325-0006 _
Date
7/2212009 (revised 10/2108)
Drainage area number
9 - Infiltration System 2 -
IL DESIGN INFORMATION.
Site Characteristics
Drainage area
85,486.00 ftz
Impervious area
52,420.00 ftz
Percent impervious
61.3% %
Design rainfall depth
1.50 in
Peak Flow Calculations
1-yr, 24-hr runoff depth
in
1-yr, 24-hr intensity
in/hr
Pre -development 1-yr, 24-hr peak Flow
ft3/sec
Post -development 1-yr, 24-hr peak Flow
ft3/sec
Pre/Post 1-yr, 24-hr peak Flow control
ft3/sec
Storage Volume: Non -SR Waters
Minimum volume required
It
Volume provided
It,
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth
in
Pre -development 1-yr, 24-hr runoff
-
ff3
Post -development 1-yr, 24-hr runoff
It
Minimum volume required
f3
Volume provided
6,865.50
ft3
Solis Report Summary
Soil type
med./fine sand
Infiltration rate
6.00
in/hr
SHWT elevation
22.50
first
Trench Design Parameters
Drawdown time
5.00
days OK
Perforated pipe diameter
n/a
in
Perforated pipe length
n/a
It
Number of laterals
2
Stone type (if used)
n/a
Stone void ratio
n1a
Stone is free of fines?
n/a
(Y or N) OK
Form SW401-Infltration Trench-Rev.2 Parts I & It. Design Summary, Page 1 of 2

r Permit No.
(to be provided by OWQ)
Trench Elevations
Bottom elevation
24.50
fmsl
OK
Storage/overflow elevation
25.93
fmsl
Top elevation
28.00
fmsl
Trench Dimensions
Length (long dimension)
25.00
ft
Width (short dimension)
5.67
ft
Height (depth)
2.50
It
OK
Additional Information
Total runoff volume captured by trench
1.66
ac-in
OK
Length of vegetative filter for overflow
50.00
it
OK
Number of observation wells
1
OK
Distance to structure
96.50
ft
OK
Distance from surface waters
-2200
It
OK
Distance from water supply well(s)
none
it
OK
Separation from impervious soil layer
none
it
OK
Depth of naturally occuring soil above SHWT
4.00
it
OK
Bottom covered with 4-in of clean sand?
y
(Y or N)
OK
Proposed drainage easement provided?
y
'(Y or N)
OK
Capures all runoff at ultimate build -out?
y (Y or N)
OK
Bypass provided for larger storms?
y
(Y or N)
OK
Trench wrapped with geotex6le fabric?
n/a
(Y or N)_
OK
Pretreatment device provided
v
Form SW401-Infiltration Trench-Rev.2 Parts I. & It, Design Summary, Page 2 of 2

Permit No..::5w o �Od��✓
(to be provided by DWQ)
III. REQUIRED ITEMS,CHECKLIST'`'
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Jrtipalg
Sheet No.
Sheet 2/6
1. Plans (1"- 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- OH -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Trench dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
Sheet 5/6
2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing:
- Bypass structure,
- Maintenance access,
- Basin bottom dimensions,
- Basin cross-section with benchmark for sediment cleanout,
- Flow distribution detail for inflow,
- Vegetated filter, and
- Pretreatment device.
Sheet 5/6
3. Section view of the infiltration basin (1" = 20' or larger) showing:
- Pretreatment and treatment areas, and
Design Calc.
- Inlet and outlet structures.
v tt
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
Soils Report
5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
ffiRl
investigation request form. County soil maps are not an acceptable source of soils information.
Sheet 3/6
6. A construction sequence that shows how the infitlration basin will be protected from sediment until the
Design Calc.
entire drainage area is stabilized.
7. The supporting calculations.
4
40
0&M
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
N/A
9. A copy of the deed restrictions (if required).
Form SW401-Infiltration Trench -Rev 2 Part III. Required Items Checklist, Page 1 of i