SW3170503 (6)

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin 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.
The wet detention basin system is defined as the wet detention basin,
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 wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— 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 wet detention 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 wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention 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
lon
-approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4
Page 1 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
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 forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
sediment storage.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the SMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
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 to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment 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-Wet Detention Basin O&M-Rev.4 Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
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. if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off-site.
The outlet device is damaged
Repair or replace the outlet device.
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.
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 permanent pool depth reads 631.5 feet in the main pond, the
sediment shall be removed.
When the permanent pool depth reads 631.5 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom
627.0 1
-----------------
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
/-ft Min.
Sediment
Storage
Permanent Pool Elevation 631.5
Pool
�-
----- -Sediment Removal Elevation 6270 - - - - - - - - - - - - Volume
Bottom Elevation
MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4
1 -ft
Storage

Permit Number:
(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:Afton Ridge Industrial
BMP drainage area number:
Print name:Landon Wyatt III
Title:Division Partner
Address:301 South College Street Suite 2800
Phone: [phone] N
Signature: 1�
Date: [�I j,��
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,toa �d a �, ,i,ry J Cc -4' , a Notary Public for the State of
W • (2, , / ;7 A , County of - c vi , do hereby certify that
Z.�7 w %/ a ZIT personally appeared before me this
day of 2 Of 7, and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal, /ar t,�� ��'' " Ktr-
Pip AN/V
�Pu
Q Notary blic 'o
m Mecklenburg
County
My Comm. Exp
08-03-2020
09/TH
C
//11111110 IAO\\\\`
=:11I
My commission expires 9- 3 - C'
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

ColeJenest
& Stone
AFTON RIDGE INDUSTRIAL
USGS MAP
CHILDRESS KLEIN PROPERTIES Prod. No. 4386 SCALE: 1"=1000'
Issued 04.24.17
1 \ /
I
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o
7,00
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ColeJenest
& Stone
AFTON RIDGE INDUSTRIAL
USGS MAP
CHILDRESS KLEIN PROPERTIES Prod. No. 4386 SCALE: 1"=1000'
Issued 04.24.17

Preliminary Wetland and Stream Report
Untz Road Site
Cabarrus County, North Carolina
(+/- 140 acres)
Prepared for
Childress Klein Properties
301 South College St, Ste 2800
Charlotte, NC 28202
May 26, 2015
Prepared By
HUYSMAN & BANDY, INC.
WETLAND AND ENVIRONMENTAL CONSULTANTS
Sparta Office
170 Dew Drop Rd.
Sparta, NC 28675

Summary and Map of Findings:
H&B has conducted a preliminary wetland evaluation of the +/-140 acre parcel located off of
Untz Road in Cabarrus County. The site and findings are depicted on the attached Figures for
the purpose of identifying the presence of surface waters and wetlands subject to federal and
state jurisdiction and permitting requirements under Sections 404 and 401 of the Clean Water
Act.
The limits of assessed jurisdictional wetlands and streams as assessed within the evaluation area
are depicted in Figure 1: Approximate Depiction of Waters and Wetlands. Assessments made by
consultants regarding jurisdictional limits and permitting requirements are subject to
verification by the US Army Corps of Engineers and, in some cases, the State agencies charged
with protection of surface water resources.
Public Sourced Natural Resource Mapping
The approximate boundaries of the evaluated area are depicted on the attached public sourced
maps and figures. The Army Corps of Engineers utilizes these mapping resources as base line
information and data when initiating site reviews for jurisdictional determinations. H&B makes
no representations relating to the accuracy of baseline data and layers depicted on these maps
and figures.
County GIS (Figure 2)
Relevant water resource layers and hydrologic layers have been activated for this figure.
Water resources depicted on this figure are not typically field verified but rather they
are generated at the county's direction and are most likely based on other public
sourced maps or by GIS staff photo -interpretation.
USGS Topographical Map (Figure 3)
Generally, a feature that is depicted in blue or magenta is a water resource. However,
some of these features may not be jurisdictional resources due to complex nuances
within the regulations. Additional jurisdictional water resources may be present though
they are not be depicted on this mapping resource. Wetland and stream jurisdictional
determinations are based on field evaluations not merely the presence or absence of
blue or magenta features depicted on this map.
Soil Survey (Figure 4)
These maps generally depict large scale soils characteristics within the evaluated area;
typically, the maps do not show specific soils units that are less than two acres in size.
These maps were not intended to be used to define jurisdictional wetlands and streams
but this information is useful to professionals familiar with soils types, hydric soils, and
their characteristics, as well as locating historic surface drainage features.
National Wetland Inventory (Figure 5)
These maps depict wetlands based on US Fish and Wildlife Service criteria; they are not
a substitute for a field evaluation.

Field Evaluation
The field evaluation was conducted utilizing current methodologies which are consistent with
those outlined in the 1987 US Army Corps Wetland Delineation Manual, the Eastern Mountain
and Piedmont Regional Delineation Supplement, post Rapanos Supreme Court decision
guidance (2007), and Regulatory Guidance Letters. All findings and assessments made by
wetland consultants regarding limits of jurisdictional or permitting are subject to verification by
the US Army Corps of Engineers and the SC Bureau of Water Resources.
Upon review of the existing site conditions, it is our assessment that three jurisdictional
perennial channels are within the bounds of the site (perennial — relatively permanent water) as
depicted in Figure 1 with dark blue lines. These features, which are depicted on the USGS
topographic map as well as the county GIS map, originate off site. Coddle Creek is located on
the east side of the property. The other two smaller tributaries, also assessed to be a perennial-
RPW's, are depicted in Figure 1. All other surface drainage features are assessed to be upland,
non -aquatic features which are not subject to regulation. Numerous existing culverts are
present on the site and they should be located during any field survey conducted for the site.
Potential wetland areas on the site were evaluated for the presence of hydric soils and evidence
of wetland hydrology and vegetation. In these areas, hydrologic proof would be the existence of
hydric soils with oxidized root channels in the upper soil horizons that have low chroma matrix
colors. Indicators of hydrology may include water borne deposits, drift lines, scour marks, the
presence of crayfish burrows, or regional indicators of soil saturation. After careful assessment
it was found four jurisdictional wetlands present on the site.
We recommend that approval of our assessments regarding the limits of jurisdiction be verified
by the Army Corps of Engineers. A formal Jurisdictional Determination request can be prepared
and submitted to the Corps in order to secure written approval.
Permitting
Many construction activities within jurisdictional wetlands and stream channels (collectively
referred to as Waters of the US) require written authorization by the US Army Corps of
Engineers and/or State water resources agencies prior to impacts.
Permitting in North Carolina
Impacts of 150 linear feet and less to the identified streams and fills of less than 1/10th acre of
jurisdictional waters and wetlands•are relatively routine to permit and the Nationwide Permit
program, and may not require compensatory mitigation for impacts. Impacts to 150 linear feet
of stream up to 300 linear feet of stream and from 1/101h to % acre of wetland may be
authorized under the Nationwide Program, but a more thorough review for avoidance and
minimization of impacts will be conducted by both the Army Corps of Engineers and the NC
Division of Water Resources, and compensatory mitigation will be required for stream and
wetland losses. Unavoidable impacts that exceed these thresholds may only be authorized
under an Individual permit and certification, and involve both public notices and comment
periods.
Once an acceptable site plan is produced, we can assist with the preparation and submittal of a
Pre -construction Notification (permit application) to the Corps and DWR if it is determined that
impacts are unavoidable. The Corps will review the application for eligibility under the

Nationwide Permit program which includes a review for impacts to cultural and historic
resources, natural heritage resources, and threatened and endangered species. Upon their
determination that the proposed development is not likely to adversely impact those resources,
they will issue a permit verification. DWR will review the application for impacts to water
quality and aquatic life. Storm water controls and treatment design will be reviewed by the
local delegated authority. If no local delegation has been approved by the DENR, a review of the
storm water management plan by the DWR storm water branch may be necessary prior to
issuance of a water quality certification.
The following links to the full text of Nationwide Permit 29 and its Water Quality certification
(for residential developments) are provided for your review:
http://www.usace.army.mii/Missions/CivilWorks/ReguIatoryProgramandPermits/NationwidePe
rmits.aspx
http://porta1.ncdenr.org/web/wq/swp/ws/­401/certsandpermits/gcs
This concludes our initial field assessment and delineation of regulated Waters of the US and
wetlands within the area of interest. Please let us know if you have questions or if we can be of
further assistance.
erely,
t
UI
isman

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HUYSMAN & BANDY, INC. Owner / Developer:
WETLAND AND ENVIRONMENTAL CONSULTANTS City/ County:
Tax PIN(s):
Vicinity Map Coordinates: Scale
Lat: 35.421033 Long: -80 691127
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Untz Road Site
Childress Klein Properties
Kannapolis/Cabarrus
46915291580000
; Date:
05/15/2015

HUYSMAN & BANDY, INC.
WETLAND AND ENVIRONMENTAL CONSULTANTS
Figure 1: Approximate Depiction
of Waters and Wetlands
*Wetland Sketch provided for illustrative purposes for preliminary planning use only. Not intended
to be relied upon for exact location, dimensions, or orientation. All findings and assessments made
by wetland consultants regarding limits of jurisdiction or permitting requirements are subject to
verification by the US Army Corps of Engineers, the NC DWR, and other appropriate local authorities.
Project Name: Untz Road Site
Owner / Developer: Childress Klein Properties
City / County: Kannapolis/Cabarrus
Tax PIN(s): 46915291580000
Coordinates: Scale: Date:
Lat 35.421033 Long: -80.691127 1 05/26/2015

Property Real ID
02-003 -0036.00
Parcel PIN
46915291580000
Physical Address:
6979 UNTZ RD CONCORD NC 28027
Land Units
13731
Owner Name 1:
WHITAKER DONALD E TRUSTEE
Land Units Type
AC
Owner Name 2:
DS, USDA, USGS, AEX, Getmapping, Aemgnd, IGN, IGP, swisstopo, and the �i
Calculated Acreage
144.388401
Mailing Address:
3661 RICHWOOD CIR
Land Value
2445120
Mail City:
KANNAPOLIS
Building Value
121620
Mail State:
NC
Assessed Value
317760
Mail Zip:
28081
Market Value
2600880
Cabarrus County shall not beheld
lableformyevorsinthe Map Created By Cabarrus County IT Department
data represented on this record This includes errors of mission.
Data Sources Cabarrus County Land Records
1:9,028
carnmssion, concern ng the content of the data, and relatwe
positional accuracy of the data The data carrot be construed to
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be alegal document. Primary sources from which tins data was
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GIs User Community 0
0.125 0.25 0 5 m
ante:
HUYSMAN & BANDY, INC, owner /Devi
WETLAND AND ENVIRONMENTAL CONSULTANTS Clty COUnty:
Tax PIN(s):
Untz Road Site
Childress Klein Properties
Kannapolis/Cabarrus
46915291580000
Figure 2: County GIS Coordinates: I Scale: Date:
Lat: 35.421033 Long: -80.691127
05/15/2015

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e - -
ect Name:
HUYSMAN & BANDY, INC. Owner / Developer:
WETLAND AND ENVIRONMENTAL CONSULTANTS City / County:
Figure 3: USGS Topo Quad
Tax PIN(s).
Untz Road Site
Childress Klein Properties
Coordinates: Scale:
Lat- 35.421033 Long- -80.691127
Kannapolis/Cabarrus
46915291580000
Date:
05/15/2015

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National Wetlands Invento
HUYSMAN & BANDY, INC.
WETLAND AND ENVIRONMENTAL CONSULTANTS
Figure 5: National Wetland
Inventory Map
vroiecT Name:
Owner/ Developer:
City / County:
Tax PIN(s).
Coordinates:
Lat: 35.421033 Long: -80.691127
Untz Road Site
Childress Klein Properties
Kannapolis/Cabarrus
46915291580000
Scale: Date:
05/15/2015