SW1220701_Stormwater Report_20221128

Storm water Pollution Prevention Plan Permit No. NCGO 10000
Comprehensive Storm Water Pollution Prevention Plan (C-
SWPPP) For Construction Activities:
Project/Site Name:
All About Plumbing
Building Addition
Project Address/Location:
5521 Old Haywood Road Suite 1
Mills River, NC 28759
SWPPP Preparer:
McCutchen Engineering Associates,
PC
J. David McCutchen
898 West Saint John Street
Spartanburg, SC 29301
Phone: [phone]
Fax: [phone]
Primary Permittee:
All About Plumbing
Permittee/Owner Contact:
Contact: Caleb Wilson
5521 Old Haywood Road
Mills River, NC 28759
828-778-2425
[e-mail]
Day -to -Day Operator:
f /- LS Zo2Z
C-SWPPP Preparation Date:
05-25-22
Revised 07-20-22
Revised 11-28-22
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Storm water Pollution Prevention Plan Permit No. NCG010000
Table of Contents
Section I PROJECT OVERVIEW
1.1 Narrative.............................................................................................................. 3-4
1.2 Storm water Management and Sediment Control ................................................ 5-8
1.3 Sequence of Construction........................................................................................8
1.4 Non -Numeric Effluent Limits............................................................................ 8-11
1.5 Buffer Zone Management......................................................................................11
Section 2 SITE FEATURES AND SENSITIVE AREAS
2.1 Sources of Pollution...............................................................................................12
2.2 Ground Stabilization..............................................................................................13
2.3 Materials Handling........................................................................................... 14-15
2.4 Operations & Maintenance.............................................................................. 15-17
Section 3 COMPLIANCE REQUIREMENTS
3.1 SWPPP Availability.............................................................................................18
3.2 Pre -Construction Conferences...............................................................................18
3.3 Inspection Requirements........................................................................................18
3.4 Maintenance Policies............................................................................................19
3.5 Record Keeping....................................................................................................19
3.6 Final Stabilization..................................................................................................20
Appendices REFERENCE MATERIAL
Appendix A -
Site Maps
Appendix B -
Drainage Maps
Appendix C -
Additional Approvals/Certifications
Appendix D -
Engineering Report (C-SWPPP* Only)
Appendix E -
Inspection Log and Reports (OS-SWPPP** Only)
Appendix F -
Rainfall Records (OS-SWPPP** Only)
Appendix G -
Additional Site Logs and Records (OS-SWPPP** Only)
Appendix H -
Misc. Design Informatiol-dCut Sheets
Appendix I -
Pond Maintenance Agreement
*C-SWPPP is acronym for Comprehensive Storm Water Pollution Prevention Plan
**OS-SWPPP is acronym for On -Site Storm Water Pollution Prevention Plan
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
section - t PROJECT OVER VIEW
1.1 Narrative (CGP Section 3.2.1)
Construction Activities and BMP Summary
Proiect
The proposed consist of developing the following:
Proposed 6,400 SF Building
• Proposed gravel parking area
• Proposed vegetated conveyance — grass Swale
Parcel #: 9632-57-0722
Total Site Acreage: 3.15 Acres
Disturbed acreage for the improvements = 1.30 Acres
Soil Type = Bradson (Type B)
The NCDEQ Stormwater Design Manual was used in the development and analysis of
this project. This project was determined to fall under the low -density stormwater
requirements per the calculation below.
Project Density Calculation:
Per 15A NCAC 2H .1003(1)(b) of the NCDEQ Stormwater Design Manual, the project
density is 15.35%.
The proposed development is located within the French Broad River Watershed. The
proposed BUA increase is 0.33 acres.
Per the NCDEQ Stormwater Design Manual, low density projects are not required to be
equipped with Stormwater Control Measures (SCMs) in exchange for limiting their built -
upon area, maximizing dispersed flow and ensuring that stormwater conveyances are
vegetated. These strategies protect the hydrology of the receiving stream, prevent erosion,
and remove pollutants through infiltration.
Onsite proposed storm water drainage conveyance has been designed using the 10-year
storm event (rational method). Vegetated conveyance calculations are included in this
report.
Perimeter control BMP's (Best Management Practices) shall be installed prior to the
initiation of clearing/grubbing, grading and demolition. These structures will be the
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
primary sediment control BMP used during the lifespan of the construction activities until
final stabilization is achieved.
Construction of this site should occur in THREE (3) distinct Erosion and Prevention and
Sediment Control Phases.
Phase I consists of the installation of the perimeter controls (i.e. silt fence, tree
protection, etc.). Remove trees and vegetation as required to construct the vegetated
conveyance. During Phase I diversion ditches/berms, etc. are required to direct sediment
laden runoff into appropriate designed measures.
Phase II consists of the new construction (building, storm drainage, etc.), grading and
storm drainage. During phase II, diversion ditches/berms, etc. are required to direct
sediment laden runoff into appropriate designed measures
Phase III consists of final stabilization (for all disturbed areas), installation of curb
/gutter and landscaping. During Phase III, finalize building construction, remove all
BMP's, and finalize landscaping.
Onsite Storm Drainage.
Onsite storm drainage features (i.e. grass swales) have been designed for the 10-year
storm event (rational method)
Rainfall intensity = 7.09 in/hr (5 min duration)
Rainfall Events (inches) — SCS/TR-55 Method
Mills River
2 year: 3.58 inches
10 year: 5.06 inches
25 year: 5.96 inches
50 year: 6.69 inches
100 year: 7.45 inches
Flooding Issues
To the best of our knowledge and belief, no downstream flooding problems are present at
the time this design was done.
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Storm water Pollution Prevention Plan Permit No. NCGO10000
1.2 Storm water Management and Sediment Control (CGP
Section 3.2.2)
Erosion Prevention BMPs
As the existing site is cleared, grubbed and graded to the proposed contours shown on the
construction site plans, erosion prevention BMPs shall be placed throughout the
construction site to aid in the prevention of sediment -laden storm water runoff. These
BMPs shall be focused in areas with high potential of erosion, areas preceding infiltration
practices, and shall be applied to all steep slopes. That is slopes equal to or greater than
3H:1V.
Each erosion prevention measure shall be selected on a site -specific basis and details have
been provided on the construction site plans. The plans identify all proposed Erosion
Prevention BMPs and the recommended installation, maintenance, and inspection
procedures.
Examples of Erosion Prevention BMPs are, but are not limited to, surface roughening,
temporary seeding, erosion control blankets, turf reinforcement mats, sodding, riprap,
outlet protection, dust control, and polyacrylamide (PAM).
Sediment Control BMPs
Sediment Control BMPs are designed to remove some of the sediment accumulated
within storm water runoff, to the best extent practicable. These BMPs help prevent
sediment impacts to adjacent properties and water bodies from storm water discharges
originating from construction sites.
Typically these BMPs are placed near each of the site's outfalls and are installed prior to
clearing and grubbing of the site (before large areas of soil are exposed). However, these
BMPs can also be located throughout the construction site and, in these circumstances,
are installed after mass grading has occurred. Placement, sizing and modifications of
Sediment Control BMPs should be left to the SWPPP preparer and/or the Site Engineer.
Contractors must consult the SWPPP Preparer as listed at the front of this SWPPP before
making any significant changes to these BMPs.
Each sediment control BMP shall be selected on a site -specific basis. Examples of
Sediment Control BMPs are, but are not limited to sediment traps, sediment basins, silt
fence, rock check dams, rock sediment dikes, sediment tubes, and inlet protection.
Structural Control BMPs and Floodplain Placement
This site -specific SWPPP utilizes the following structural control BMPs: storm water
management pond, storm sewer systems, inlet protection and silt fence. These practices
have been designed to either divert flows from exposed soils, to retain/detain flows, and
to otherwise limit the runoff and the discharge of pollutants from disturbed areas of the
construction site.
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Storm water Pollution Prevention Plan Permit No. NCG010000
Throughout the lifespan of the construction project these BMPs will be installed and
maintained, as required by the SWPPP and the construction site plans, until final
stabilization has been achieved for the areas draining to each BMP. Upon final
stabilization, each structural control BMP must be modified to the post -construction
conditions shown within the approved construction site plans or removed, if the structural
BMP was a temporary structure
Construction Entrances and Dust Control
All access areas into and out of the limits of disturbance, as shown on the construction
site plans are required to be equipped with a construction entrance. The use of this BMP
will limit the amount of sediment being transported by construction vehicles onto existing
roadways or other impervious areas. Any tracked sediment, along with any attached
pollutants, deposited on impervious areas could be washed downstream during the next
rain event. Each construction entrance must be installed as shown in the details section of
the construction site plans.
If a new entrance or exit is required, that is not shown on the plans, install the
construction entrance as noted by the construction entrance detail, marls the location on
the plans and make a record of this minor modification in the SWPPP's modification log,
which is located within one of the appendices of the On -site SWPPP.
Each stabilized construction entrance should be used in conjunction with Street Sweeping
measures if it becomes apparent that sediment is still being tracked onto adjacent
impervious areas, even with the use of the construction entrance.
During extremely dry conditions, drought, and/or excessive winds, the construction site
should be treated for dust control to prevent the suspension of fine sediment particles into
the air, being carried offsite, and deposited on adjacent properties or surface waters. This
practice may not be directly called out for on the construction site plans. A water tanker
used to spray the soil down may be an effective way to prevent excessive dust at a
construction site.
Water Quality BMPs During Construction
Site -specific water quality BMPs (e.g., storm water management pond, inlet protection,
silt fence, and outlet protection) must be installed prior to the mass clearing, grubbing and
grading of the site, and must be kept in functioning order throughout the lifespan of all
construction activities. Each of these BMPs must be maintained and inspected until all
areas draining to these BMPs have reached final stabilization, approved by the
construction site inspector or the SWPPP Preparer, and recorded within the stabilization
log located as an appendix of the On -site SWPPP.
The location, installation procedures, and maintenance procedures for each water quality
BMP can be found within the approved construction site plans.
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Stone water P011Ution Prevention Plan Permit No. NCG010000
Sediment and • , •n Control Trapping Efficiency
Sediment Trapping will be achieved via silt fence. The sediment trapping calculations for
the proposed site via silt fence are shown below.
Sediment Trapping Efficiency During Construction (Perimeter Silt Fence)
Storm Event Trapping Efficiency
(SEDCAD Calcs)
2 year 96.1 %
10 year 95.1%
Drainage area = 0.57 acres
SCS CN = 86.0
Length: Double row of 125'
Height: 2.5'
of silt fence (250' Total)
Upon final stabilization, each construction site will have to make the transition from
temporary BMPs to permanent BMPs. This transition includes the conversion of the
temporary diversion swales to permanent grass swales.
Swales remove pollutants from stormwater by biofiltration, settling and infiltration.
Grassed swales filter pollutants as stormwater runoff moves through the leaves and roots
of the grass.
Other Storm Water Management Procedures
Based on the nature, conditions, and/or procedures associated with this construction site,
the following items must be followed and adopted by all those conducting land disturbing
activities at this site:
• All construction debris must be stockpiled in designated areas, which have been
provided with the proper BMPs to prevent the discharge of pollutants through storm
water runoff from building or other similar materials off -site or into surface waters.
• Any additional waste material or stockpile material (i.e., soil and mulch) must also be
stored in the designated areas as shown on the Construction Site Plans or as the
contractor, responsible for day -day activities at this site, deems appropriate. Silt fence
or an approved equal shall surround all stockpiled materials.
• All parties conducting work at this construction site must be informed of and make
note of pollutant sources, both industrial and construction, at this site, and be informed
of all controls and measures the will be implemented to prevent the discharge of these
pollutants in storm water runoff.
• Any additional non -storm water discharges, as referenced in the CGP, should be
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
eliminated or reduced to the maximum extent feasible. All unpreventable non -storm
water discharges shall be treated through the approved storm water management
system before release off -site. Following is a list of allowable non -storm water
discharges:
■ Fire hydrant flushing
■ Wash water without detergents
■ Water used for dust control
■ Potable water
■ Building wash down water without detergents
■ Uncontaminated pavement wash water
■ Uncontaminated condensation from mechanical equipment
■ Uncontaminated ground or spring water
■ Water from foundation of footing drains
■ Uncontaminated excavation dewatering
■ Landscape irrigation.
1.3 Seauence of Construction
The construction sequence for this project has been provided on Drawings EP series
plans of the construction site plans. Each item/step of that construction sequence has
been listed is the sequence that they should be implemented. The estimated
construction start date is January 2023. The estimated construction completion date is
May 2023.
For additional information or questions on the sequencing please contact the SWPPP
Preparer or the Permittee referenced on the cover of this SWPPP.
1.4 Non Numeric Effluent Limits
Storm water Volume and Velocity Control
During the implementation of construction activities, all parties performing work at
this construction site whose work may affect the implementation of the SWPPP must
be informed of and directed on how to comply with this Non -Numeric Effluent Limit,
which requires the management of storm water runoff within the construction site and
at each outfall. The purpose of this requirement is to control the storm water volume
and velocity at these locations to minimize erosion.
Specifically, each responsible party should be made aware of the practices that have
been or should be implemented at the construction site to accomplish these particular
stormwater management practices. Below is a list of practices that may be utilized
within the disturbed area and at each outfall at construction sites to control storm water
volume and velocity:
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
_Volume Control
• Limiting the amount of disturbed area and exposed soils
• Staging and/or Phasing of the Construction Sequence;
• Sediment Basins and Sediment Traps
• Diverting off -site flow around the construction site;
• Controlling the Drainage Patterns within the Construction Site;
• Temporary Stabilization of Disturbed Areas.
Velocity Control
• Surface Roughening and/or other Slope Stabilization Practices;
• Level Spreaders, Riprap Plunge Pools and/or other Velocity Dissipation BMPS
located at the Construction Site's and Sediment Basin Outfalls.
• Use of Rock Checks, Sediment Tubes, Etc. in Temporary Diversions Swales
and Ditches.
• Use of Erosion Control Blankets, Turf Reinforcement Mats, and other Non -
Vegetative BMPs that can be used to Quickly Stabilize Disturbed Areas.
The SWPPP Preparer/Engineer should approve any modifications (Additional BMPs
or Changes to Existing BMPs) to address the management of storm water volume and
velocity prior to implementation. All approved SWPPPs that were issued coverage
under the CGP should include ample BMPs and other control measures to address this
specific Non -Numeric Effluent Limit.
Soil Exposure, Compaction and Preservation
Throughout construction activities, the amount of soil exposed during
construction should be kept to a minimum. This may be accomplished by
minimizing the amount the disturbed area within the permitted Limits of Disturbance
(shown on the approved construction site plans) to only that which is necessary to
complete the proposed work. For areas that have already been disturbed and where
construction activities will not begin for a period of 14 days or more, temporary
stabilization techniques must be implemented.
Prior to implementation of any major grading activities, topsoil is to be preserved by
placing it in areas designated for stockpiling until final grades are reached. Each
stockpile must be equipped with proper sediment and erosion controls to preserve the
topsoil and protect adjacent areas from impacts. Once final grades have been reached,
the preserved topsoil should be utilized to apply to areas identified for stabilization.
Topsoil contains nutrients and organisms that aid in the growth of vegetation.
The compaction of soil should also be minimized to the degree practicable during
grading activities. This is especially important during the replacement of topsoil to aid
in a quick establishment of vegetative cover. Compaction of soil may also reduce
rainfall's ability to infiltrate into the soil, increasing the amount of storm water runoff.
Soil Stabilization
Throughout construction activities, soil stabilization techniques are to be initiated as
soon as practicable whenever any clearing, grading, excavating, or other land-
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
disturbing activities have permanently or temporarily ceased on any portion of the
construction site and will not resume for a period exceeding 14 calendar days. For
areas where initiating stabilization measures is infeasible, (e.g., where snow cover,
frozen ground, or drought conditions preclude stabilization), initiate vegetative or non -
vegetative stabilization measures as soon as practicable.
Steep Slopes (Slopes of 30% grade or greater)
All disturbed steep slopes (30% grade, —3H:1 V, or greater), and steep slopes to be
created through grading activities must be managed in a fashion that limits the
potential of erosion along the slopes. All parties whose work is/was responsible for the
creation/disturbance of steep slopes must comply with the following items:
• Minimize the Disturbance of all steep slopes, when possible.
• Divert Concentrated or Channelized Flows of storm water away from and
around steep slope disturbances.
• Use Specialized BMP Controls including temporary and permanent seeding
with soil binders, erosion control blankets, surface roughening, reducing
continuous slope length with terracing or diversions, gradient terraces, interceptor
dikes and swales, grass -lined channels, pipe slope drains, subsurface drains, level
spreaders, check dams, seep berms, and triangular silt dikes to minimize erosion.
• Initiate Stabilization Measures as soon as practicable on any disturbed steep
slope areas where construction activities have permanently or temporarily ceased,
and will not resume for a period exceeding 7 calendar days.
• A Vegetative and/or Non -Vegetative Cover must be established within 3
working days from the time that stabilization measures were initiated.
Stabilization of steep slopes should be a priority for those performing work at the
construction site. At the very least, runoff control BMPs should be implemented to
transport storm water runoff from the top of the slope to the toe of the slope. An
example of this is to install diversion swales along the top of slope and direct the
runoff towards pipe slopes drains to transports the runoff to the toe of the slope. All
pipe slope drain outlets are to be equipped proper outlet protection.
Sediment Discharge Minimization
Permittees, Contractors, and all other parties responsible for conducting land -
disturbing activities are required to install and maintain all erosion and sediment BMPs
that are identified on the approved construction site plans. These BMPs have been
designed and approved to address such factors as the amount, frequency, intensity and
duration of precipitation, the nature of resulting storm water runoff, and soil
characteristics, including the range of soils particle sizes expected to be present on the
construction site. Proper installation, inspection and maintenance will allow
these BMPs to operate at maximum efficiencies in order to minimize sediment
discharges to the maximum extent practical.
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Storin water Pollution Prevention Plan Permit No. NCGO 10000
Pollutant Discharge Minimization
Permittees, Contractors, and all other parties responsible for conducting land -
disturbing activities are required to install, implement, and maintain effective pollution
prevention measures to minimize the discharge of pollutants. At a minimum, the
following items must be implemented:
• Minimize the discharge of pollutants from dewatering trenches and
excavations by managing runoff with the appropriate controls. Otherwise these
discharges are prohibited;
• Minimize the discharge of pollutants from equipment and vehicle
washing, wheel wash water, and other wash waters. Wash waters must be
treated in a sediment basin or alternative control that provides equivalent or better
treatment prior to discharge;
• Minimize the exposure of building materials, building products,
construction wastes trash, landscape materials, fertilizers, pesticides,
herbicides, detergents, sanitary waste and other materials present on the site to
precipitation and to storm water; and
• Minimize the discharge of pollutants from spills and leaks and implement
chemical spill and leak prevention and response procedures.
Prohibited Discharges
Permittees, Contractors, and all other responsible parties for conducting land -
disturbing activities are prohibited to discharges, from the construction site, the
following items:
® Wastewater from washout of concrete, unless managed by an appropriate
control;
® Wastewater from washout and cleanout of stucco, paint, form release
oils, curing compounds and other construction materials;
® Fuels, oils, or other pollutants used in vehicle and equipment operation
and maintenance; and
® Soaps or solvents used in vehicle and equipment washing.
1.5 Buffer Zone Management
Not applicable
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
"%." iion SITE FEATURES AND SENSITIVE AREAS
2.1 Sources ofPollutlon
Throughout construction activities, each permittee, contractor, and person responsible for
conducting work will need to ensure that sources of pollution are managed to prevent their
discharge from the construction site. Expected pollution sources during construction have been
identified in Table 2.1-A, but due to the nature of construction activities, it is often tough to
predict all pollution sources that may appear throughout the life of a construction project. For
that reason, the following table has also been provided to help all those performing work at this
construction site identify possible sources of pollution
Storm water runoff subjected to the identified pollution sources must be treated by the
appropriate 13MPs as directed by this SWPPP.
In the event that any additional sources of pollution are identified during construction, the
person(s) with day-to-day operational control at the site is to add the new source(s) to Table
2.1-A and consult with the SWPPP Preparer to properly address this source and to prevent the
discharge of its pollutant through storm water runoff.
Table 2.1-A: Potential Sources of Pollution
NIELMaterial
or
Location*
Appropriate Control Measures
Chemical
Loose soil
exposed/disturbed
All areas within
As directed by the construction Plans. This
during clearing,
Sediment
the Limits of
includes Silt Fence, sediment tubes,
grubbing and grading
Disturbance
sediment basins, and sediment traps.
activities
Areas where
Located adjacent
construction
Heavy Metals
to each
Concrete Washout Basin as shown on
equipment are
& pH
construction
sheet C-8 of the plans.
cleaned, a.k.a.
entrance
concrete washout
In and around
Direct water into impoundments such as
Water encountered
Nutrients &
any trenching
basins or traps to allow for the
during trenching
Sediment
activities,
sedimentation of the listed pollutants.
Sediment &
All areas to be
Paving Operations
Trash
paved.
Inlet protection.
Nutrients, pH,
Material Delivery and
Sediment,
All areas used as
Silt fence and/or sediment dikes
Storage Areas
Heavy Metals,
storage areas
oils & cirease
Metals,
Areas
Provide secondary containments, locate in
Equipment fueling and
hydrocarbons,
surrounding fuel
upland areas. Repair leaking and broken
maintenance areas
oils and
tanks
hoses.
greases
Metal oxides,
stoddard
Throughout site,
solvent, talc,
primarily in areas
Washwater should be contained and is
Paints
calcium-
of building
prohibited from being discharged
carbonate,
construction
arsenic
*Area where material/chemical is used on site.
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Storm water Pollution Prevention Plan Permit No. NCG010000
2.2 Ground Stabilization
1. Ground Stabilzation Timelines
Ground stabilization shall be achieved on any area of a site where land disturbing
activities have ceased within the timeframes listed in Table 3 below. It is
recommended to stabilize the ground more quickly if practicable. Extensions of time
may be approved by the E&SC plan authority based on weather or other site -specific
conditions that make compliance impracticable. Portions of a site that are lower in
elevation and not expected to discharge during construction may be exempt from the
temporary ground cover requirements if identified on the E&SC plan and approved by
the E&SC plan authority.
Table 3: Required Ground Stabilization Timeframes
Stabilize within
this many
Site Area Description
calendar days
after ceasing
Timeframe Variations
land
disturbance
(a) Perimeter dikes,
swales, ditches, and
7
None
perimeter slopes
(b) High Quailty Water
7
None
HQ Zones
If slopes are 10' or less in length
(c) Slopes Steeper than
7
and are not steeper than 2:1, 14
3:1
days are allowed
7 days for slopes greater
than 50' in length and with
slopes steeper than 4:1
(d) Slopes 3:1 to 4:1
14
• 7 days for perimeter dikes,
swales, ditches, perimeter
slopes and HQW Zones
• 10 days for the Falls Lake
Watershed
• 7 days for perimeter dikes,
swales, ditches, perimeter
(e) Areas with slopes
14
slopes, and HQW Zones
flatter than 4:1
10 days for the Falls Lake
Watershed unless there is
zero slope.
2. Permanent Ground Stabilzation Timeline
After the permanent cessation of construction activities, any areas with temporary
ground stabilization shall be converted to permanent ground stabilization as soon as
practicable but in no case longer than 90 calendar days after the last land disturbing
activity. Temporary ground stabilization shall be maintained in a manner to render the
surface stable against accelerated erosion until permanent ground stabilization is
achieved.
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
2.3 Ma terlals Han
Any structural controls installed to manage construction materials stored or used on site
shall be included in the field copy of the E&SC plan. Requirements for handling materials
on construction sites shall be as follows:
1. Polyacrylamides (PAMS) and Flocculants
Polyacrylamides (PAMS) and flocculants shall be:
a.) Stored in leak -proof containers that are kept under storm -resistant cover or
surrounded by secondary containment structures designed to protect adjacent
surface waters;
b.) Selected from the NC DWR List of Approved PAMS/Flocculants list, available
at:
https•//files nc gov/ncdeq/Water%2OQuailiy/Environmental%2OSciences/ATU/
ApprovedPAMS4 1 2017.pdf,
c.) Used at the concentrations specified in the NC DWR List of Approved
PAMS/Flocculants and in accordance with the manufacturer's instructions.
2. Equipment Fluids
a.) Fuels, lubricants, coolants, and hydraulic fluids, and other petroleum
products shall be handled and disposed of in a manner so as not to enter
surface or ground waters and in accordance with applicable state and federal
regulations. Equipment used on the site must be operated and maintained
properly to prevent discharge of fluids.
b.) Equipment, vehicle, and other wash waters shall not be treated in a
sediment basin or sediment trap. Alternative controls should be provided such
that there is no discharge of soaps, solvents, or detergents.
3. Waste Materials
a.) Building material and land clearing waste shall be disposed of in
accordance with North Carolina General Statutes, Chapter 130A, Article 9 —
Solid Waste Management, and rules governing the disposal of solid waste (15A
NCAC 1313). Areas dedicated for managing building material and land clearing
waste shall be at least 50 feet away from storm drain inlets and surface waters
unless it can be shown that no other alternatives are reasonably available.
b.) Paint and other liquid building material waste shall not be dumped into
storm drains. It is recommended to locate paint washouts at least 50 away fiom
storm drain inlets unless there is no alternative. Other options are to install
lined washouts to use portable, removable bags or bins.
c.) Hazardous or toxic waste shall be managed in accordance with the federal
Resource Conservation and Recovery Act (RCRA) and NC Hazardous Waste
Rules at 15A NCAC, Subchapter 13A.
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Storm water Pollution Prevention Plan Permit No. NCGO 10000
d.) Litter and sanitary waste shall be managed in a manner to prevent it from
entering waters and shall be disposed of offsite.
4. Herbicide, Pesticide, and Rodenticides
Herbicide, pesticide, and rodenticides shall be stored and applied in accordance
with the Federal Insecticide, Fungicide, and Rodenticide Act and label restrictions.
5. Concrete Materials
Concrete materials onsite, including excess concrete, shall be controlled and
managed toa void contact with surface waters, wetlands or buffers. No concrete or
cement slurry shall be discharged from the site. (Note that discharges from onsite
concrete plants require coverage under a separate NPDES permit — NCG140000.)
Any hardened concrete residue will be disposed of, or recycled on site, in
accordance with local and state solid waste regulations.
6. Earthen Material Stock Piles
Earthen materials stock piles shall be located at least 50 feet away from storm drain
inlets and surface waters unless no other alternatives are reasonably available.
2.4 Operation and Maintenance
1. Modifications to the E&SC Plan
Modifications to the approved E&SC plan that require changes to the E&SC
measure designs, the drainage areas, or the disturbed areas draining to the E&SC
measures shall be approved by the E&SC plan authority. Deviations from the
approved E&SC plan, or approved revised E&SC plan shall consititute a violation
of this permit unless the deviation is to correct an emergency situation where
sediment is being discharged off the site. The E&SC plan authority may allow
deviations from the E&SC plan on a case -by -case basis if the deviations are minor
adjustments to address minor deficiencies. A minor adjustment shall be the
addition of E&SC measures (e.g., silt fence, inlet protection, check dams, rolled
erosion control practices, etc.), or the relocation of E&SC measures that would
improve the overall stormwater management and sediment control onsite. Minor
adjustments shall be noted on the approved E&SC plan and maintained at the job
site.
2. Operation and Maintenance
The permittee shall install and maintain all temporary and permanent E&SC
measures as required by this permit and the approved E&SC plan.
3. Corrective Actions
If self -inspections required by this permit identify a need for maintenance of
control measures, modifications or additions to control measures, or corrective
actions to control sediment or other pollutants, these actions shall be performed as
soon as uossible considerinp- adverse weather and site conditions.
15
All About Plumbing - Building Addition

Storm water Pollution Prevention Plan Permit No. NCGO 10000
4. Draw Down of Sediment Basins for Maintenance or Close out
Sediment basins and traps that receive runoff from drainage areas of one acre or
more shall use outlet structures that withdraw water from the surface when these
devices need to be drawn down for maintenance or close out unless this is
infeasible. The circumstances in which it is not feasible to withdraw water from the
surface shall be rare (for example, times with extended cold weather). Non -surface
withdrawals from sediment basins shall be allowed only when all of the following
criteria have been met:
a.) The E&SC Plan authority has been provided with documentation for the non -
surface withdrawal and the specific time periods or conditions in which it will
occur. The non -surface withdrawal shall not commence until the E&SC plan
authority has approved these items,
b.) The non -surface withdrawal has been reported as an anticipated bypass in
accordance with Part III, Section C, Item (2)(c) and (d) of this permit,
c.) Dewatering discharges are treated with controls to minimize discharges of
pollutants from stormwater that is removed from the sediment basin. Examples
of appropriate controls include properly sited, designed and maintained
dewatering tanks, weir tanks and filtration systems,
d.) Vegetated, upland areas of the sites or a property designed stone pad is used to
the extent feasible at the outlet of the dewatering treatment devices described in
Item (c) above,
e.) Velocity dissipation devices such as check dams, sediment traps, and riprap are
provided at the discharge points of all dewatering devices, and
£) Sediment removed from dewatering treatment devices described in Item (c)
above is disposed of in a mariner that does not cause deposition of sediment
into waters of the United States.
5. Bypass of E&SC Measures
Diversions of stormwater from E&SC measures when the design storm has not
been exceeded are not allowed. Bypass of E&SC measures shall be reported in
accordance with Part III, Section C, Item (2)(c) and (d) of this permit.
6. Unavoidable Bypass for Public Safety
A bypass may be allowed by the Director if the Director determines that all of the
following conditions were met:
a.) The bypass is unavoidable to prevent loss of life, personal injury or severe
property damage,
b.) There were no feasible alternatives to the bypass, such as the use of auxiliary
control facilities, retention of stormwater or maintenance during normal periods
of equipment downtime or dry weather. This condition is not satisfied if
adequate back up controls should have been installed in the exercise of
reasonable engineering judgement to prevent a bypass which occurred during
normal periods of equipment downtime or preventative maintenance, and
AR About Plumbing Building A•• •

Storm water Pollution Prevention Plan Permit No. NCGO 10000
c.) The permittee submitted a notice of the bypass per the record keeping
requirements in Part II1, Section C, Item (2) (c) and (d) of this permit.
7. Upset of E&SC Measures
Diversions of stormwater from E&SC measures may be considered as an upset if
the permittee can demonstrate that all of the following conditions have been met.
In any enforcement proceeding, the permittee seeking to establish the occurrence
of an upset has the burden of proof.
a.) The permittee submitted notice of the upset as required in this general permit
and identifies the cause(s) of the upset.
b.) The permittee demonstrates that the upset was not caused by operational error,
improperly designed treatment or control facilities, lack of preventative
maintenance, or careless or improper operation.
c.) The permittee agrees to take remedial measures if necessary.
About Plumbing - Building A•• •

Storm water Pollution Prevention Plan Permit No. NCGO 10000
Seeilon 3 Compliance Requirements
3.1 SWPPP A vaila bility
A copy of the On -Site SWPPP (OS-SWPPP) shall be provided by kept onsite until the
project is closed out
3.2 Pre -Construction Conferences
Prior to begirming construction, City of High Point shall be notified (minimum of 48
hours) and a pre -construction meeting must take place onsite. The following must be in
attendance:
• Permittee or representative (having signature authority)
O SWPPP preparer (Civil Engineer)
® 3rd Party inspector
® Contractor and necessary sub -contractors.
Attendance must be recorded per the form provided in appendix G and maintained within
the on -site SWPPP.
3.3 Inspection Requirements
Construction site inspections are to be conducted on a routine basis and must include all
areas disturbed by construction activity, including perimeter BMP's and areas used for
storage of materials that are exposed to precipitation.
Due to the size of this project, site inspections are required to be conducted at a minimum
of a least once every calendar week and must be conducted until final stabilization is
reached on all areas for the construction site. An inspection is recommended within 24
hours of end of a storm event of 0.5 inches or greater. Inspections must be performed by
qualified personnel per City of High Point requirements. Copies of the inspection must
be distributed to the permittee, engineering, construction administrator, contractor(s) and
a copy must be provided in the on -site SWPPP.
Rainfall log (indicated in appendix F) shall be completed on a daily basis by the onsite
contractor. This log shall be maintained in the on -site SWPPP.
A record of each inspection and of any action items taken must be retained as part of the
On -Site SWPPP for at least three years from the date that permit coverage expires or is
terminated.
AU About Plumbing - Building Addition

Storm water Pollution Prevention Plan Permit No. NCGO 10000
3.4 Maintenance Requirement,
A. Construction Maintenance: All BMP's and other protective measures identified in the
OS-SWPPP must be maintained in effective operating condition. If site inspections
identify BMP's are not operating effectively, maintenance must be performed within
seven (7) calendar days, before the next inspection, or as reasonably possible, and before
the next storm event.
If periodic inspections indicate that a BMP has been used inappropriately, or incorrectly,
the permittee must address the necessary replacement or modification required to correct
the BMP within a time frame of 48 hours of identification. If existing BMP's need to be
modified or if additional BMP's are necessary to comply with the requirements of this
permit, implementation must be completed prior to the next storm event. If the contractor
is unable to implement the BMP prior to the next storm event, the contractor shall
provide documentation in the On -Site SWPPP.
Sediment from sediment traps/basins shall be removed once sediment accumulates 1/2 of
the height of the clean -out stake. Sediment shall be disposed of onsite (within the limits
of disturbance) or off site on an existing approved site (currently under permit coverage).
Sediment collected by Silt Fence, or another sediment control measure, must be removed
when the deposited sediment reaches 1/3 of the height of the above ground portion of
these BMP's or before it reaches a lower height based on the manufacturer's
specifications.
B. Permanent Maintenance: Permanent Storm Water management structures must be
routinely maintained to operate per design
agreement is included in this SWPPP.
3.5 Record Keeping
A copy of the permanent maintenance
The On -Site SWPPP (OS-SWPPP) is a derivative of the Comprehensive SWPPP (C-
SWPPP). The OS-SWPPP shall be provided to the contractor at the pre -construction
meeting to remain onsite.
The pertinent information regarding Self -Inspection, Recordkeeping and Reporting can
be found on Sheet C500 of the construction documents.
Contents of the OS-SWPPP:
Coverage Approval letter/ local Approvals/Contractor Certifications/Recording
Keeping/Logs
AU About Numbing - Bui[ding A•• •

Storm water Pollution Prevention Plan Permit No. NCGO 10000
3.6 Final Stabilization
Project is not deemed complete until stabilization is achieved. Refer to plans for further
information.
Pond as-builts shall be furnished by the owner to the engineer for evaluation. The as-
builts shall be prepared by a North Carolina Licensed Land Surveyor. It must include the
following information:
• Grades/Contours/depths of pond(s)
® Elevations and dimension of all outlet structures, including
o Pipe and orifice inverts and diameters
o Weir elevations and dimensions
o Riser dimensions and elevations
o Emergency spillway dimensions and elevations (top of rock if applicable)
o Locations and inverts for all pipes discharging into pond
• Upon receipt and approval of as-builts, the engineer shall prepare necessary
documentation and submit close-out documentation to City of High Point for
review and approval.
1
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCGO 10000
Appendix A Site Maps
Locations Map
Site Maps
Topographic Map
Soils Maps
Floodway Map
All About Plumbing - Building Addition

snderson County, NC Tax Parcel Report Wednesday, April 27, 202:
WARNING: THIS IS NOT A SURVEY
Parcel Information
REID:
10001068
Pin:
9632570722
Listed to:
ALL ABOUT PLUMBING INC.
Neighborhood:
TOWN OF MILLS RIVER (D)
Mailing Address:
P.O. BOX 1041
Township:
Mills River
Mailing City, State, Zip:
HENDERSONVILLE, NC 28793
Municipality:
MILLS RIVER
Physical Address:
5521 OLD HAYWOOD RD
Tax District:
MILLS RIVER TOWN
Deed:
003058/00553
Plat:
SLD 10634
Date Recorded:
2017-05-26 16:19:00.0
Elementary School District:
MARLOW
Revenue Stamps:
300
Middle School District:
RUGBY MIDDLE
County Zoning:
Cities
High School District:
WEST HIGH
Property Description:
MINOR SUBDIVISION 3.0 AC L01
Soil:
Hayesville loam, 7 to 15 percent
slopes
Map Sheet:
9632.00
Voting Precinct:
Mills River North
Assessed Acreage:
3.00000000
Commissioner District
3
Building Value:
$227,900.00
Agricultural District
None Found
Land Value:
$147,600.00
North Carolina House District
117
Value To Be Billed:
$375.500.00
U.S. House District
11
North Carolina Senate District
48
Flood Zone:
Zone X, Not Shaded (Areas
outside of the floodplain)
THIS IS NOT A SURVEY.
Henderson County
Geographic Information Systems (GIs)
All information or data provided, whetter subscribed, purchased or otherwise distributed, whether In hard copy or digital
200 North Grove Street
media, shall be at the userAET"s own risk. Henderson County makes no warranties or guarantees, including Ilia warranties of
Hendersonville, NC 20792
merchantability or of fitness for a particular purpose. Map data Is not appropriate for, and Is not to be used as, a geodetic,
P: [phone]
legal, or engineering base system. The dale Is not Intended as a substitute for surveyed locations such as can be determined
F: [phone]
by a registered Public Land Surveyor, and does not meet ilia minimum accuracy standards of a Land Information
System/Geographic Information System Survey in North Carolina (21 NCAC 56.1606).

,nderson Countv, NC I ax Parcel Keport vveanesaay, April zt, zuz;
REID:
Listed to:
Mailing Address:
Mailing City, State, Zip:
Physical Address:
Deed:
Date Recorded:
Revenue Stamps:
County Zoning:
Property Description:
Map Sheet:
Assessed Acreage:
Building Value:
Land Value:
Value To Be Billed:
North Carolina Senate District
Parcel Information
10001068
ALL ABOUT PLUMBING INC.
P.O. BOX 1041
HENDERSONVILLE, NC 28793
5521 OLD HAYWOOD RD
003058/00553
2017-05-26 16:19:00.0
300
Cities
MINOR SUBDIVISION 3.0 AC L01
9632.00
3.00000000
$227,900.00
$147,600.00
$375,500.00
48
Pin:
Neighborhood:
Township:
Municipality:
Tax District:
Plat:
Elementary School District
Middle School District:
High School District:
Soil:
Voting Precinct:
Commissioner District
Agricultural District
North Carolina House District
U.S. House District
Flood Zone:
9632570722
TOWN OF MILLS RIVER (D)
Mills River
MILLS RIVER
MILLS RIVER TOWN
SLID 10634
MARLOW
RUGBY MIDDLE
WEST HIGH
Hayesville loam, 7 to 15 percent
slopes
Mills River North
3
None Found
117
11
Zone X, Not Shaded (Areas
outside of the floodpiain)
THIS IS NOT A SURVEY.
Henderson County
Geographic Information Systems (GIs) All Information or data provided, whether subscribed, purchased or othenvlso distributed, whelher In hard copy or digital
200 North Grove Street media, shall be at the userhVI's own risk. Henderson County makes no warranties or guarantees, including the warranties of
Hendersonville, NC 26792 merchantability or of fitness for a particular purpose. Map data is not appropriate for, and is not to be used as, a geodetic,
P: [phone] legal, or engineering base system. The data Is not Intended as a substitute for surveyed locations such as can be determined
F: [phone] by a registered Public Land Surveyor, and does not meal the minimum accuracy standards of a Land Information
SyslemlGoogrephlc Information System Survey in North Carolina (21 NCAC 56.1608).

r
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Stream Information -
Stream Index- 6.58
Stream Name: McDowell Creek
Description: From source to French
Broad River
Classification: C
Date of Class.: March 3-1, 1996
What does this Class. I-ellore info
mean?
River Basin: French Broad
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Hydrologic Soil Group —Henderson County, North Carolina
Hydrologic Soil Group
Map unit symbol
-
Map unit name
Rating
L:::
Acres In AOI
I
Percent of AOI
BaB
Bradson gravelly loam,
2 to 7 percent slopes
B
7.2
40,5%
BaC
Bradson gravelly loam,
7 to 15 percent slopes
B
2.2
12.4%
DeB
Delanco (dillard) loarn, 2
to 7 percent slopes
C
2.7
15.4%
HyC
Hayesville loam, 7 to 15
percent slopes
C
5.6
31.7%
Totals for Area of Interest
17.8
( 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long -duration storms,
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet, These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture, These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink -swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (AID, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
lJ_ SDI Natural Resources Web Soil Survey 5/18/2022
Conservation Service National Cooperative Soil Survey page 3 of 4

Hydrologic Soil Group —Henderson County, North Carolina
Rating Options
Aggregation Method. Dominant Condition
Component Percent Cutoff., None Specified
Tie -break Rule: Higher
USDA Natural Resources Web Soil Survey 5/18/2022
Conservation Service National Cooperative Soil Survey Page 4 of 4

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Stormwater Pollution Prevention Plan Permit No. NCGO 10000
Appendix B Drainage Maps
Grass Swale Basin Map
Sediment 'Trapping Basin Map
All About Plumbing - Building Addition

n
I
CARRIE LOU WILSON
PIN 9632-48-8321
DB 349 PG 4
REMNANT ACREAGE: ±23.6 ACRES
CtINO /�
PERM/CAP
o, PFRM/CAP 7
ElEV: IOI0.61 L
GRASS SWALE #1 ° U)
DRAINAGE BASIN o° Q
0.82 ACRES , 0 m
WEIGHTED C: 0.77 w
i IsEPnC J
! I / 3EItVR aN�T AREA
0
I I /
ftmM/CM
1 I
I./ / ❑ / azv. tol 4s2 ICI I.��,I����� 30.15'
Po
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e
GRASS SWALE #2
=� DRAINAGE BASIN
I 0.27 ACRES \ I \�11 PIN INVESTMENTS
NVE TM NTS L C Yi
WEIGHTED C: 0.77 \\ I ` I I I , 1 / / / I ` D8 1290 PG 52 W
r
Calmer
AARON & MEGAN BLACKMOR CORNER n
DPIN
IN 1455 PG47-35356
I-
I
I • 30.48' co
RITEWAY EXPRESS INC MARK R LAFEVER
PIN 9632-47-9133 PIN 9632-57-4257 J
I DB 912 PG 467 DB 862 PG 482
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0' 60' 120' 180'
GRAPHIC SCALE: 1" = 60'-0"

CARRIE LOU WILSON
PIN 9632-48-8321
DB 349 PG 4
REMNANT ACREAGE: ±23.6 ACRES
RFBM/CPP
E V. 1009.24 --T
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1 125 LF OF SILT FENCE
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DOUBLE ROW
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PIN 9632-47-4356
08 1455 PG 353
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RITEWAY EXPRESS INC
PIN 9632-47-9133
D8 912 PG 467
30.48'
to I
RBI INVESTMENTS LLC
PIN 9632-57-5740
DD 1290 PG 52
MARK R LAFEVER
PIN 9632-57-4257
OB 862 PG 482
0' 60' 120' 180'
GRAPHIC SCALE: V = 60'-0"

StormWatel' Pollution Prevention Plan Permit No. NCGO10000
Appendix C Additional Approvals/Certifications
USACE's Jurisdictional Determinations
(Mot applicable)
Jurisdictional Floodplain Management Certifications
(Not applicable)
Other Local Ordinance Certifications and Approvals
(to be provided upon receipt)
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCGO 10000
Appendix D Engineering Reports
Sediment Trapping Calculations
Grass Swale Calculations
Time of Concentration Calculations
All About Plumbing Building Addition

NOAA Atlas 14, Volume 2, Version 3
Location name: Mills River, North Carolina, USA*"��""°
9)4 Latitude: 35.42220, Longitude:-82.57516
I
` Elevation: 2185.19 ft**r.
source: ESRI Mat
' source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Marlin, B. Lin, T. Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PQS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1
Average recurrence interval (years)
luration ��������
1 2 5 10 25 50 100 200 500 1000
5•min
0.331-0.408)
37
(0.39,367 5 0.486
10-min 0.529.0 652) (0.633.07 77)
15-min 0.734 0.879
(0.662-0.815) (0.795-0.976)
30-min 1.01 1.22 -11
(0.907-1.12) (1.10-1.35)
60-min 1.25 1.52
1.13-1.39 1.38-1.69
2-hr
1.47 1.79
(1.32-1.63) (1.61-1.98)
3-hr
(1.431876) (1.72 2012)
6-itr
1.98 2.37
(1.81-2.19) (2.16-2.60)
12-hr
2 50 2,98
(2.30-2.73) 1 (2.74-3.26)
24-hr
2•99
2.77-3.23)
3.58
1 (3.32-3.88)
2-day
3.32 3682)
3,95 4.57
[3-dayF--580---JF-4.52
(3.55-4.07)
(4.23.4.85)
4-day
4.04
(3.78-4.31)
4.fl1
(4.50-5.13)
[7-dayF-4-32---]F-556-1--]
(4.43-5.05)
(5.26-6.00)
10-day
20-day
2 52 5.75)
7.37
(6.98-7.77)
1 (6.05 6.81)
8,66
1 (8.21-9.15)
30-day
(8 59 9351)
10.0 6
2)
45-day
11.i0-12.1)
(12.i8-14.1)
60-day
13.8
(13.2-14.5)
16.1
15.3-16.9)
0,524 0.591 0.676 0.742 11
0.807 11
0.873 1 0.959 11
1.03
0.473-0.582)
0.531-0.653 0.603-0.748 (0.658-0.820)
1(0.713-0.894
0.766-0.970
(0.831-1.07)1(0.881-1.16)
0,839 0.944
1.08 1.18 1.28 1.38
1
1.52 1.62
(1.31-1.70) j(1.39-1.82
0.757-0.932
(0.848-1.05)
1(0.961-1.19) 1 (1.05-1.31 1.13-1.42) (1.21-1.54)
1.06
1.20
1,37
1,50
1 -.62--li 1.75
1 1
1 1.91 F 2.03
(1.65-2.13) (1.74-2.28)
(0.957-1.18)
(1.07-1.32)
1 (1,22-1.51)
1 (1.33-1.65)
(1.43-1.80) (1.53-1.94)
1.51 1,73
2.02
2.25 2.48
2,72 3.04
3.29
(1.36-1.68)
(1.56-1.92)
1 (1.81-2.24)
1 (2.00-2.49) 1 (2,19-2.75)
(2.38-3.02)
1(2.63-3.40)
(2.82-3.70)
1.93 2.25
2.69
3.05
2,71-3.37)
3.42
3.02-3.79
3.81
3.34-4.24)
4.36
(3.78-4.87)
4.80
4.12-5.40)
(1.74-2.15)
(2.03-2.49
(2.40-2.98)
2.25 2.63
1
3,15 3.57 4.02
1 (2.80-3.49) 1 (3.16-3.96) 1 (3.53-4.46) 11
4.50
(3.91-4.99)
5.16 5.70
(4.43.5.76) (4.85.6.40)
(2.02-2.49) (2.35-2.90)
2.38 2.78
3.36
3.fl4
4.35
4.90
5.70 6,36
(2.15-2.65)
1 (2.49-3.09)
11 (2.98-3.73)
1 (3.394.26)
1 (3.80-4.84)
1 (4.24-5.46)
(4.85-6.40) (5.35-7.17)
2.92
3,39
4.07
4.65
5.28
5.96
6,96
7.79
(2.66-3.20)
1 (3.07-3.72)
1 (3.66-4.47)
1 (4.15-5.11)
1 (4.67-5.81)
1 (5.21-6.58)
(5.98-7.72)
(6.61-8.70)
3.66
4.20
4,95
5.57
6.20
6,87
7.79
fl,52
(3.36-3.99)
(3.85.4.58)
1 (4.52-5.41)
1 (5.06-6.09)
(5.60.6.79)
1 (6.15-7.54)
(6.90-8.62)
(7.47-9.49)
4.40
5.06
5.96
11
6.69
1 (6.14-7.23)
7.45
(6,80.8.04)
fl.24
11 (7.48-8.89)
9,34
(8.40-10.1)
10.2
(9.12-11A)
(4.07-4.77)
(4.67-5.47)
(5.49-6.44)
5,17
5.90
5.48-6.34
6.91
6,40-7.42)
7.73
7.14-8.30
8.57
7.89.9.22)
9,44
8.64-10.2)
10.6
9.66-11.6)
11.6
10.5-12,6)
4.81-5.55)
5.46
6.21
7.22
8.02
8.85
9.69
10.II
11.8
(5.10-5.85)
1 (5.78-6.64)
1 (6.70-7.72)
1 (7.43.8.59)
1 (8.16-9.49)
1 (8.89-104)
(968-11.7)
(10.7-12.7),
5.76
6.51
7.52
8.32 I
F 9,13
9.94
11.0
F 11.9
(5.38-6.15)
1 (6.08.6.95)
1 (7.00-8.03)
1 (7.72-8.88)
1 (8.43-9.76)
(9.15-10.6)
(10.1-11.9)
(10.9-12.9)
6.72
7.61 I
F 8,81
1
9.77
9.08-10.4
10.7
(9.95-11.5)
11.7
(10.8-12.6)
13.1
(12.0-14.1)
14.2
1(12.9-15.3
6.30-7.19
7.60
(7.12-0.13)
8.54
(8.21-9.41
9.82 11
10.8
11.9
12.9
14.3
15,4
7.18-8.07
(8.06-9.07)
1 (9.24-10.4)
10.2-11.5
11.1-12,6
(12.0-13.7)
1(13.2-15.3)
14.1-16.5
10.1
11.1
12.5
13.6
%6
15.7
17.0
17.9
( 953-10.6)
(10.5-11.8)
1 (11.9-13.2)
1 (12.8-14.4)
1 (13.8-15.5)
1 (14.7-16.6)
(15.9-18.0)
(16.7-19.1)
12.1
13.3
14.7
1
15.8
1 (15.a-16.6)
16.8
1 (15.9-17.7)
77.8
1 (16.7-18.7)
19.0
1(17.8-20.1)
19.8
(18.6-21.0)
(11.5-12.8)
15.1
(12.6-14.0)
16.4
(13.9-15.5)
17.9
18.9
19.9
20.8
21.8
22,6
(14.4-15.9)
(15.6-17.2)
(17.0-18.8)
(18.0-19.9)
1 (18.9-20.9)
1 (19.7-21.9)
(20.7-23.0)
(21.3-23.8)
18.0
19.3
20.9
22.1
23.1
24.0
25.0
25.8
(17.1-18.9
18.4-20.3)
(1 9.9-22.0)
(21.0-23.2)
21.9-24.3)
(22.7-25.2)
(23.7-26.4)
(24.4-27.2)
Precipitation frequency (PF) estimates In this table are based on frequency analysis of partial duration series (PDS).
Numbers In parenthesis are PF estimates at lower and upper bounds of the 90% confidence Interval. The probability that precipitation frequency estimates (for
a given duration and average recurrence Interval) will be greater than the upper bound (or less than the lower bound) Is 5%. Estimates at upper bounds are
not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more Information.
Back to Top
PF graphical

NOAA Atlas 14, Volume 2, Version 3 W„
Location name: Mills River, North Carolina, USA*
�14 I Latitude: 35.42220, Longitude: •82.5751, ¢
Icy Elevation: 2185.19 ft** 1 ~1 !A
`�✓ ' sour a: ESRI Maps
" source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lln, T. Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabularI PF graphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1
Average recurrence interval (years)
Duration ��I-
5•rnin 4.40
(3.97-4.90)
10-min 3 52
(3.17-3.91)
10 25
����
5.24 6.29 7.09 8.11
(4.74-5.83) 5.68-6.98) 1 (6.37-7.84) (724-8.98)
4.26 5.03 5.66 6.47
(3.80.4.66) 4.54-5.59 (5.09-6.27) (5.77-7.15
�f �����
50 100 L_200
8.90 9.6II 10.5
7.90-9.84) 8.56-10.7 9.19-11.6) 11
7.09 7.70 8.30
6.29-7.83) 1 (6.80-8.53) 1 (7.28-9.22)
500 1000
11.5 12.3
(9.97-12.9) (10.6-13.9
9.10 9.71
1 (7.88-10.2) (8.33-10.9)
15•min 2.94 3.52
(2.65-3.26) (3.18-3.90)
30-min 2 01 2,43
(1.81-2.24) (2.20-2.70)
Lad
3.02
(2.72-3.35)
4.78 5.46
(4.29-5.29) 1 (4.87-6.04)
3.46 4.05
(3.11-3.83) (3.61-4.48)
5.98
1 (5.30-6.61)
4.50
(4.00-4.98)
6.49
1 (5.73-7.18) 1
4.97
(4.39-5.50)
6.99
(6.12-7.76)
5.44
(4.77-6.04)
7.64
1 (6.62-8.53) 1
6.OII
(5.26.6.79)
8.13
(6.97-9.14)
6.5II
(5.64-7.40)
60-min (1.13.1.21539 1.38 1.69)
2-Itr 6.736 0.893
(0.662-0.815) (0.804.0.988)
3•hr 0 526 0. 334
(0.475-0.587) (0.671.0.705)
6-hr 0 331 0.395
(0.303.0.365) (0.360.0.434)
0 208 0.248
12-hr (0.191-0.227) (0.228.0.270)
24-hr 0125 0.149
(0.115.0.135) (0.138.0.162)
2 day (0069.0 080 (0082-0 095
1.74 2315
1.13
(1.01-1.25)
0.794
(0.715.0.882)
0.4II7
(0.444-0.535)
0.304
(0.279.0.331)
0783
(0.170.0.199)
(0.100.0.116)
2.03 2549) (2. 0 2998)
1.31 1.57
(1.18-1.45) (1.40-1.74)
0.927 1.12
(0.830-1.03) (0.994A.24)
0.566 0.680
(0.513-0.621) (0.612-0.747)
0.349 0.411
(0.320-0.380) (0.375-0.449)
0.211 6.248
(0.195.0.228) (0.229-0.268)
(0.114-0132 . 0.133-055)
(2.71 3537
1,79
(1.58-1.98)
1.28
1 (1.13-1.42)
0.777
(0.694-0.853)
0.463
(0.420-0.505)
6.279
(0.256-0.301)
0.149-0173
3. 2 3?79)
2.01
(1.76-2.23)
1.45
1 (1.27-1.61)
0.882
(0.779-0.971)
0.515
(0.465.0.564)
0.310
0.283.0.335)
0.164-0192)
(3.344 24)
2.25
(1.96-2.50)
1.63
(1.41-1.82)
0.996
(0.870-1.10)
0.570
(0,511-0.626)
0.343
(0.312-0.371)
0.180-0 212
(3.70 4687)
2.58
(2.21-2.88)
1.90
(1.62-2.13) 1
1.16
(0.998-1.29) 1
0,646
(0.573.0.715)
0.389
(0.350.0.421)
(0.201-0 239)
0.151
(0.137-0.162)
0.115
(0.105.0.124)
1(0.07 -0 084)
(0055.0 064)11(0.059.0
0.035
(0.033-0.038)
0.026
(0.025-0.028)
4,86
(4.12-5.40
2.85
(2.42 3.20)
2.12
(1.78-2.39)
1.30
(1.10-1.45)
0.707
(0.620-0.788)
0.426
(0.380-0.461)
242
0.2018-0 262
0.163
(0.148.0.176)
0.124
(0.113-0.134)
1(0077--0 091)
069)
0.037
(0.035-0.040)
0.028
(0.026-0.029)
3-day
4-day
7-day
10-day
20-day
[30-day
0.053
(0.049.0.057)1(0.059.0.067)
0.042
(0.039-0.045)
(0.026.0 030
(0.02 -0 024)
0.015
(0.015-0.016)
0.013
0.063
0.050
(0.047-0.053)
(003 -0 036
(0025.0 028
0.018
(0.017-0.019)
0.015
0.076
(0.071-0.081)
0.060
(0.056.0.064)
003 -0 043)
0030.0 034
0.021
(0.020-0.022)
0.017
(0.016-0.018)
0.086
(0.080-0.092)
0.068 11
(0.063-0.072)
45
0042-0 040
(0. 3 40 038)
0.023
(0.022-0.025)
0.018
(0.017-0.019)
0,100
(0.093-0.107)
0.078
(0.073-0.084)
0049 0 056
(0.038-0 043)1(0.042-0
0.026
(0.025-0.028)
0.020
(0.019.0.022)
0.111
(0.103-0.119)
0.087
(0.080-0.093)
0.054-0 062)
048
0.028
(0.027-0.030)
0.022
(0.021-0.023)
0.123
(0.113.0.132)
0.095
(0.088-0.102)
0059-0068)
0046.0 053)
0.030
(0.029-0.032)
0.023
(0.022-0.025)
0.135
(0.124-0.144)
F 0. 004
(0.095-0.111)
(0064-0 075)
0050.0 057
0.033
(0.031-0.035)
0.025
(0.023-0.026)
45•day
60 da
(0.012-0.013)
0.011
(0.010-0.011)
0.010
(0.009-0.010)
(0.014.0.015)
0.012
(0.012-0.013)
0.011
0.011-0.012)
0.014
(0.013.0.015)
0.012
(0.012-0.013)
0.015
(0.014-0.016)
0.013
(0.013-0.014)
0.017
(0.016-0.017)
0.015
0.014-0.015)
0.018
(0.017.0.018)
0.015
(0.015-0.016
6.018
(0.018-0.019)
0.016
(0.015-0.017)
0.019
(0.018-0.020)
0.017
(0.016-0.018)
0.620
(0.019.0.021)
16-0.
0.016.0.018)
0.021
0.020.0.022)
07-0. )
(0.017-0.019
t Precipitation frequency (PF) estimates In this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence Interval. The probability that precipitation frequency estimates (for a
y be higher than currently valid PMP valor less than the lower ules 5% Estimates at upper bounds are not
given
ckedration and against probable maximum precipitatie recurrence on (PMPwill be ) estimates reater manhd upper
Please refer to NOAA Alias 14 document for more information.
Back to Top
PF graphical

SEDCAD 4 for Windows
r,—,,inh4 1oaR _Onn7 PamoIo I crhv.i�h
I I I L TWIRM
Silt Fence
2 Year Storm
McCutchen Engineering
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
r,—,,inht 1oOR _,)nn7 P—Io I C,hIA-h
Storm Type: NRCS Type II
Design Storm: 2 yr - 24 hr
Rainfall Depth: 3.580 inches
particle SizeDistribution:
Size (mm)
Bradson
1.4000
100.000%
1.0000
89.700%
0.0630
66.000%
0.0440
38.100%
0.0380
36.600%
0.0040
4.200%
0.0030
2.600%
0.0010
0.000%
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
r'- ... inh4 1 OQA _9M7 0-1. 1 C,h—h
Type
Stru (flows Stru
# into) #
Musk. K Musk. X
(hrs)
Description
Silt Fence
#2 ==> End
0.000 0.000
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
(`nnvrinhf 1QQR _,)nn7 P-1. 1 S,h\A/oh
4
Structure Summary;
Immediate
Total
Peak
Total
Peak
Peak
Contributing
Contributing
Discharge
Runoff
Sediment
Sediment
Settleable
24VW
Area
Area
Volume
(tons)
Conc.
Conc.
(MI/1)
(ac)
(ac)
(cfs)
(ac-ft)
(mg/0
(MI/1)
In
1.24
0.10
3.4
44,320
28.99
15.91
#2 0.570
0.570
Out
1.21
0.10
1 0.1
2,437
0.00
0.00
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
('—,rinh+ iooR _9nn7 P-1a I S,h—h
article Size Distribution(s) at Each Structure
Structure #a
Size (mm)
In
Out
1.4000
100.000%
100.000%
1.0000
89.700%
100.000%
0.0630
66.000%
100.000%
0.0440
38.100%
100,000%
0.0380
36.600%
100.000%
0.0040
4.200%
100.000%
0.0030
2.600%
66,013%
0.0010
0.000%
0.000%
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
(`nnurinh4 1QQR _')r)07 Po .[l I Arh,,-h
Structure Detail.,
Structure #Z (Silt Fence)
Silt Fence Inputs:
Fence Flow Width along Land Slope Tie -back
Rate (gpm/sq contour (ft) Height (ft) (070) distance (ft)
ft)
10.0 250.0 2.5 4.00 62.5
Silt Fence Results:
*Sediment Storage: 0. 00 ac-ft
*No sediment capacity defined
Peak Fence Stage:
0.21 ft
Peak Water Stage:
0.21 ft
Dewater Time:
0.50 days
Trap Efficiency:
96.06 %
Dewatering time is calculated from peak stage to lowest spillway
Stage -Capacity -Discharge Table
Fence Stage
(ft)
Water Stage
(ft)
Area
(ac)
Capacity
(ac-ft)
Discharge
(cfs)
Dewater
Time
(hrs)
0.00
0.00
0.000
0.000
0.000
Top of Sediment
0.10
0.10
0.014
0.001
0.563
11.95
0.20
0.20
0.029
0.003
1.136
0.21
0.21
0,030
0.003
1.206
0.00 Peak Stage
0.30
0.30
0.043
0.006
1.721
0.40
0.40
0.057
0.011
2.317
0.50
0.50
0.072
0.018
2.924
0.60
0.60
0.086
0.026
3.543
0.70
0.70
0.100
0.035
4.172
0.80
0.80
0.115
0.046
4.813
0.90
0.90
0.129
0.058
5.465
1.00
1.00
0.143
0.071
6.127
1.10
1.10
0.158
0.086
6.801
1.20
1.20
0.172
0.103
7,487
1.30
1.30
0.187
0.121
8.183
1.40
1.40
0.201
0.140
8.890
1.50
1.50
0.215
0.161
9.609
1.60
1.60
0.230
0.183
10.339
1.70
1.70
0.244
0.207
11.080
0
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
('—,rinhf 9aaA _9nn7 P-1. I Gh,.mh
Fence Stage
(ft)
Water Stage
(ft)
Area
(ac)
Capacity
(ac-ft)
Discharge Dewater
Time
(cfs) (hrs)
1.80
1.80
0.258
0.232
11.832
1.90
1.90
0.273
0.259
12.595
2.00
2.00
0.287
0.287
13.369
2.10
2.10
0.301
0.316
14.154
2.20
2.20
0.316
0.347
14.951
2.30
2.30
0.330
0.379
15.759
2.40
2.40
0.344
0.413
16.578
2.50
2.50
0.359
0.448
17.408
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
f—...inht 100A _9nn7 P-1. I S]rhw.h
Time of
Peak
Runoff
Stru SWS
SWS Area
Conc Musk K Musk X Curve UHS
Discharge
Volume
# #
(ac)
(hrs) Number
(hrs)
(cfs)
(ac-ft)
#2 1
0.570
0.060 0.000 0.000 86.000 TR55
1.24
0.102
0.570
1.24
0.102
subwatershed Sedimentoloqvy Detail:
Peak
Peak
Stru SWS
Sediment Sediment
Settleable
24VW
Soil K L (ft) S (%) C
P PS #
Conc.
Conc
# #
(tons)
(MI/1)
(mg/1)
(MI/1)
#2 1 0.170 225.00 4.00 1.0000
1.0000 1
3.4 44,320
28.99
15.91
3.4 44,320
28.99
15.91
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
Cnnvrinh4 iaap _9nn7 P-1. I Srh—h
All About Plumb
ediment Trappinq Calculatioli
Silt Fence
10 Year Storm
McCutchen Engineering
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
cn—r{nht 1QQR Ann? ID-1, I Snh%A-h
Storm Information:
Storm Type: NRCS Type II
Design Storm: 10 yr - 24 hr
Rainfall Depth: 5.060 inches
Particle Size Distribution;
Size (mm)
Bradson
1.4000
100.000%
1.0000
89.700%
0.0630
66.000%
0.0440
38.100%
0.0380
36.600%
0.0040
4.200%
0.0030
2.600%
0.0010
0.000%
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
f—...inh4 1 OOR _9M7 P—Io I Gh�ni�h
Type
Stru (flows Stru
# into) #
Musk. K Musk. X
(hrs)
Description
Silt Fence
#2 ==> End
0.000 0.000
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
Cnrnirinhf 9 QQR Ann7 P-10 I Crh,—h
0
Structure Summary;
Immediate
Total
Peak
Total
Peak
Peak
Contributing
Contributing
Discharge
Runoff
Sediment Sediment
Settleable
24VW
Area
Area
Volume
(tons) Conc.
Conc.
(MI/1)
(ac)
(ac)
(cfs)
(ac-ft)
(mg/1)
(MI/1)
In
1.93
0.17
5.7 45,086
29.50
16.38
#2 0.570
0.570
Out
1.87
0.17
0.3 3,411
0.21
0.01
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
f—...inh4 1 QQR _9nn7 D—.1. I Crh—h
antic% Size Distribution(s) at Each Structure
Structure #Z:
Size (mm)
In
Out
1.4000
100.000%
100.000%
1.0000
89.700%
100,000%
0.0630
66.000%
100.000%
0.0440
38.100%
100.000%
0.0380
36.600%
100.000%
0.0040
4.200%
85.269%
0.0030
2.600%
52.786%
0.0010
0.000%
0.000%
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
(' . , i ht 9 aaA _9nn7 P-1. I Crh,-h
Structure Detail.,
Structure #Z (Sllt Fence)
Silt Fence Inputs:
Fence Flow Width along Land Slope Tie -back
Rate (gpm/sq contour (ft) Height (ft) (%) distance (ft)
ft)
10.0 250.0 2.5 4.00 62.5
Silt Fence Results:
*Sediment Storage: 0.00 ac-ft
*No sediment capacity defined
Peak Fence Stage:
0.32 ft
Peak Water Stage:
0.32 ft
Dewater Time:
0.50 days
Trap Efficiency:
95.07 %
Dewatering time is calculated from peak stage to lowest spillway
Stage -Capacity -Discharge Table
Fence Stage
(ft)
Water Stage
(ft)
Area
(ac)
Capacity
(ac-ft)
Discharge
(cfs)
Dewater
Time
(hrs)
0.00
0.00
0.000
0.000
0.000
Top of Sediment
0.10
0.10
0.014
0.001
0.563
11.90
0.20
0.20
0.029
0.003
1.136
0.05
0.30
0.30
0,043
0.006
1.721
0.32
0.32
0.047
0.007
1.865
0.01 Peak Stage
0.40
0.40
0.057
0.011
2.317
0.50
0.50
0.072
0.018
2.924
0.60
0.60
0.086
0.026
3.543
0.70
0.70
0.100
0.035
4.172
0.80
0.80
0.115
0.046
4.813
0.90
0.90
0.129
0.058
5.465
1.00
1.00
0.143
0.071
6.127
1.10
1.10
0.158
0.086
6.801
1.20
1.20
0.172
0.103
7.487
1.30
1.30
0.187
0.121
8.183
1.40
1.40
0.201
0.140
8.890
1.50
1.50
0.215
0.161
9.609
1.60
1.60
0.230
0.183
10.339
1.70
1.70
0.244
0.207
11.080
0
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
('—,rinhf 9QQR _OM7 P-1. I Crh-.h
Fence Stage
(ft)
Water Stage
(ft)
Area
(ac)
Capacity
(ac-ft)
Discharge Dewater
Time
(cfs) (hrs)
1.80
1.80
0.258
0.232
11.832
1.90
1.90
0.273
0.259
12.595
2.00
2.00
0.287
0,287
13.369
2.10
2.10
0.301
0.316
14.154
2.20
2.20
0.316
0.347
14.951
2.30
2.30
0.330
0.379
15.759
2.40
2.40
0.344
0.413
16.578
2.50
2.50
0.359
0.448
17.408
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
Cnrn..inhf 900R _,)nn7 ID-Il I Srhumh
Time of
Peak
Runoff
Stru SWS
SWS Area
Musk K Curve
Conc Musk X UHS
Discharge
Volume
# #
(ac)
(hrs) Number
(hrs)
(cfs)
(ac-ft)
#2 1
0.570
0.060 0.000 0.000 86.000 TR55
1.93
0.166
0.570
1.93
0.166
Subwatershed SedimentologyDetail:
Peak Peak
Stru SWS Soil K L (ft) S (%) C P PS # Sediment Sediment Settleable 24VW
# # (tons) Conc. Conc (MI/1)
(mg/0 (MI/1)
#2 1 0.170 225.00 4.00 1.0000 1.0000 1 5.7 45,086 29.50 16.38
5.7 45,086 29.50 16.38
6
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
f nnvrin h4 9 QQR _9M7 P—Io I Crh-.h
All About Plumb
ediment TravDing Calculatiojn
Silt Fence
100 Year Storm
McCutchen Engineering
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
Cnnvrinhf 9OOR _9nn7 P—io I Gh,—h
Storm Information;
Storm Type: NRCS Type II
Design Storm: 100 yr - 24 hr
Rainfall Depth: 7.450 inches
Particle Size Distribution;
Size (mm)
Bradson
1.4000
100, 000%
1.0000
89.700%
0.0630
66.000%
0.0440
38.100%
0.0380
36.600%
0.0040
4.200%
0.0030
2.600%
0.0010
0.000%
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
r`- ... inh4 1QQA _Or)n7 P—Io I Crh,—h
Type
Stru (flows Stru
# into) #
Musk. K Musk. X
(hrs)
Description
Silt Fence
#2 ==> End
0.000 0.000
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
Cnnvrinh4 loop _,)nn7 0-10 I Crh—h
0
Structure Summary:
Immediate
Total
Peak
Total
Peak
Peak
Contributing
Contributing
Discharge
Runoff
Sediment Sediment
Settleable
24VW
Area
Area
Volume
(tons) Conc.
Conc.
(MI/1)
(ac)
(ac)
(cfs)
(ac-ft)
(mg/1)
(MI/1)
In
3.02
0.27
9.8 46,275
30.27
16.85
#2 0.570
0.570
Out
2.91
0.27
0.5 4,337
0.45
0.19
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
r nvrinht I QQA _9nn7 P-10 I Crh,—h
Structure #2.
Size (mm)
In
Out
1.4000
100.000%
100.000%
1.0000
89.700%
100.000%
0.0630
66.000%
100.000%
0.0440
38.100%
100,000%
0.0380
36.600%
100.000%
0.0040
4.200%
76,103%
0.0030
2.600%
47.112%
0.0010
0.000%
0.000%
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
(' n,rinhf 9QQR _,)nn7 P-1. I Srh,-h
on
StructureDetail:
Structure #2 (Silt Fence)
Silt Fence Inputs:
Fence Flow Width along Land Slope Tie -back
Rate (gpm/sq contour (ft) Height (ft) (%) distance (ft)
ft)
10.0 250.0 2.5 4.00 62.5
Silt Fence Results:
*Sediment Storage: 0.00 ac-ft
*No sediment capacity defined
Peak Fence Stage:
0.50 ft
Peak Water Stage:
0.50 ft
Dewater Time:
0.50 days
Trap Efficiency:
94.48 %
Dewatenng time is calculated from peak stage to lowest spillway
Stage -Capacity -Discharge Table
Fence Stage
(ft)
Water Stage
(ft)
Area
(ac)
Capacity
(ac-ft)
Discharge
(cfs)
Dewater
Time
(hrs)
0.00
0.00
0.000
0.000
0.000
Top of Sediment
0.10
0.10
0.014
0.001
0.563
11.50
0.20
0.20
0.029
0.003
1.136
0.35
0.30
0.30
0.043
0.006
1.721
0.05
0.40
0.40
0.057
0.011
2.317
0.05
0.50
0.50
0.071
0.018
2.914
0.03 Peak Stage
0.50
0.50
0.072
0.018
2.924
0.60
0.60
0.086
0.026
3.543
0.70
0.70
0.100
0.035
4.172
0.80
0.80
0.115
0.046
4.813
0.90
0.90
0.129
0.058
5.465
1.00
1.00
0.143
0.071
6.127
1.10
1.10
0.158
0.086
6.801
1.20
1.20
0.172
0.103
7.487
1.30
1.30
0.187
0.121
8.183
1.40
1.40
0.201
0.140
8.890
1.50
1.50
0.215
0.161
9.609
1.60
1.60
0.230
0.183
10.339
1.70
1.70
0.244
0.207
11.080
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
f—...inhi 1QQA _gnn7 P-1. I Srh—h
Fence Stage
(ft)
Water Stage
(ft)
Area
(ac)
Capacity
(ac-ft)
Discharge Dewater
Time
(cfs) (hrs)
1.80
1.80
0.258
0.232
11.832
1.90
1.90
0.273
0.259
12.595
2.00
2.00
0.287
0.287
13.369
2.10
2.10
0.301
0.316
14.154
2.20
2.20
0.316
0.347
14.951
2.30
2.30
0.330
0.379
15.759
2.40
2.40
0.344
0.413
16.578
2.50
2.50
0.359
0.448
17.408
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

SEDCAD 4 for Windows
Cnnvrinh+ iaap _9nn7 [D—Io I C,h-.h
Time of
Peak
Runoff
Stru SWS
SWS Area
Musk K Curve
Conc Musk X UHS
Discharge
Volume
# #
(ac)
(hrs) (hrs) Number
(cfs)
(ac-ft)
#2 1
0.570
0.060 0.000 0.000 86.000 TR55
3.02
0.275
0.570
3.02
0.275
Subwatershed Sedimentolmy Detail.
Peak
Peak
Stru SWS
Sediment Sediment
Settleable
24VW
Soil K L (ft) S (%)
C P PS #
Conc.
Conc
# #
(tons)
(MI/1)
(mg/1)
(ml/1)
#2 1 0.170 225.00 4.00
1.0000 1.0000 1
9.8 46,275
30.27
16.85
9.8 46,275
30.27
16.85
O
Filename: Silt Fence Calculations.sc4 Printed 11-28-2022

All About Plumbing — Grass Drainage Swale Calculations
Vegetated Conveyance — Grass Swale #1
Available Capacity (per detail on drawing C400):
2 ,
Q _ 1.49 * A * R 5 * S2
n
Q = Flow Rate, (cfs)
n = Manning's Roughness Coefficient (unitless)
A = Flow Area, (sf)
R = Hydraulic Radius, (ft)
S = Slope of Energy Gradient, (ft/ft)
Q = to be determined
n = 0.15
A = 9.75 s.f.
P = 11.50
R = 0.85 (A/P)
S=5.0%
1.49 z 1
Q =— xAx R3 xS2
n
Q _ 1.49 x9.75x0.852 1 x0.05
0.15
Q = 19.4 cfs (Available Capacity)
10 Year Design Flow (From Grassed Area
Drainage Basin: 0.82 acres
Intensity: 7.09 in/hr
Weighted C = (0.57 Ac)*(0.95)+ (0.25 Ac)*(0.35)
0.57 Ac+0.25 Ac
Weighted C = 0.77
Q = CIA
Q = 0.77 x 7.09 x 0.82
Q = 4.48 cfs

All About Plumbing — Grass Drainage Swale Calculations
Velocity Check
Velocity = Q (cfs) /A (ft2)
Q = 4.48 cfs
A=9.75ftz
V = 4.48 / 9.75 = 0.46 ft/s
Conclusion: Capacity is available in the proposed design channel to handle 10-year design storm &
velocity is equal to 0.46 ft/s which is lower than the maximum design velocity for grass swales of 4 ft/s.

All About Plumbing — Grass Drainage Swale Calculations
Vegetated Conveyance — Grass Swale #2
Available Capacity (per detail on drawing C400):
2 ,
Q_ 1.49 * A* R 3 * S z
n
Q = Flow Rate, (cfs)
n = Manning's Roughness Coefficient (unitless)
A = Flow Area, (sf)
R = Hydraulic Radius, (ft)
S = Slope of Energy Gradient, (ft/ft)
Q = to be determined
MON
A = 9.75 s.f.
P = 11.50
R = 0.85 (A/P)
S=2.0%
1.49 2 1
Q =— xAx R3 xS2
n
Q = 1.49 x9.75x0.853 x0.022
0.15
Q = 12.3 cfs (Available Capacity)
10 Year Design Flow (From Grassed Area
Drainage Basin: 0.27 acres
Intensity: 7.09 in/hr
Weighted C = (0.15 Ac)*(0.95)+ (0.12 Ac)*(0.35)
0.15 Ac+0.12 Ac
Weighted C = 0.68
Q = CIA
Q = 0.68 x 7.09 x 0.27
Q = 1.30 cfs

All About Plumbing — Grass Drainage Swale Calculations
Velocity Check
Velocity = Q (cfs) /A (ftz)
Q = 1.30 cfs
A = 9.75 ft2
V= 1.30 / 9.75 = 0.13 ft/s
Conclusion: Capacity is available in the proposed design channel to handle 10-year design storm &
velocity is equal to 0.13 ft/s which is lower than the maximum design velocity for grass swales of 4 ft/s.

W • 1 • • � =�
Location: Mills River, NC
Sheet Flow
Surface Description
Bare Soil
Manning's Roughness (n)
Table 3-1
0.011
Flow Length (L)
100
Two Year 24 hour rainfall (P)
3.6"
Average Land slope (s)
4.00% or 0.04 ft/ft
0.007(nL)0-'
T = (P) 0.5 x (s) 0.4
T _ 0.007(0.011 x 100)0.8
(3.6)0.s x (0.04)0.4
T = 0.01 hours
Shallow Concentrated Flow
Surface Description
unpaved
Flow Length (L)
100
Watercourse Slope (ft/ft)
4.0% or 0.04 ft/ft
Average Velocity (figure 3-1)
3.2
L
T 3600V
200
T 3600 x 3.2
T = 0.02 hours

Total Combined Time of Concentration
Time = 0.01 hours + 0.02 hours
Time = 0.03 hours or 1.8 minutes

Stor nwater Pollution Prevention Plan Permit No. NCGO10000
Appendix E Inspection Log and Reports
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCGO 10000
... Inspection LoTL
Name of Construction Site Location of Construction Site
Date of Inspection
Inspector Name
Does Inspection Report require
maintenance of installed BMPs.
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCGO10000
SWPPP Inspection Log (Continued).,. --AL
Date of Inspection Inspector Name Does Inspection Report require
maintenance of installed BMPs .
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
❑ Yes
❑ No
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Perm itNo, NCG010000
Appendix F Rainfall Logand Reports
All •b•ut Plumbing - Building A•• •

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Stormwater Pollution Prevention Plan Permit No. NCGO10000
Appendix G Additional Site Logs and Records
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCG010000
Date Ft Time Description/Outline and Name of the Presenter of SWPPP and Site Requirements
Name I Company I Signature
All About Plumbing - Building Addition

StOrmwater P011Uti0n Prevention Plan Permit No. NCGO 10000
••• Pre -Construction ConferenceI/ I• 1
Name Company Signature
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCG010000
SWPPP Contractor I•
Name of Construction Site Location of Construction Site
Company/individual.. - -
1.)
Start Date:
Completion Date:
2.)
Start Date:
Completion Date:
3.)
Start Date:
Completion Date:
4.)
Start Date:
Completion Date:
5.)
Start Date:
Completion Date:
6.)
Start Date:
Completion Date:
7.)
Start Date:
Completion Date:
8.)
Start Date:
Completion Date:
9.)
Start Date:
Completion Date:
10.)
Start Date:
Completion Date:
All About Plumbing - Building Addition

Storniwater Pollution Prevention Plan Permit No. NCGO 10000
SWPPP Contractor Et Sub -Contractor Log (Continued)
11.)
Start Date:
Completion Date:
12.)
Start Date:
Completion Date:
13.)
Start Date:
Completion Date:
14.)
Start Date:
Completion Date:
15.)
Start Date:
Completion Date:
16.)
Start Date:
Completion Date:
17.)
Start Date:
Completion Date:
18.)
Start Date:
Completion Date:
19.)
Start Date:
Completion Date:
20.)
Start Date:
Completion Date:
21.)
Start Date:
Completion Date:
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCGO10000
SWPPP Modification••
Name of Construction Site Location of Construction Site
Type of Modification..
❑ Major ❑ Minor
.. ification
Start Date:
Completion Date:
Reason for Approved/Implemented
Modifications: By:
ModificationType of ..Modification
❑ Major ❑ Minor
Start Date:
Completion Date:
Reason for
Modifications:
Approved/implemented
By:
Type of Modification..
❑ Major ❑ Minor
.. ification
Start Date:
Completion Date:
Reason for
Modifications:
Approved/Implemented
By:
ModificationType of
❑ Major ❑ Minor
..Modification
Start Date:
Completion Date:
Reason for
Modifications:
Approved/Implemented
By:
ModificationType of
❑ Major ❑ Minor
..Modification
Start Date:
Completion Date:
Reason for
Modifications:
Approved/Implemented
By:
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCG010000
Name of Construction Site Location of Construction Site
Type of Modification
❑ Major ❑ Minor
Description of Modification
Location of Modification
Start Date:
Completion Date:
Reason for
Modifications:
Approved/Implemented
By:
Type of Mod ification
❑ Major ❑ Minor
Description of ModificationModification
Start Date:
Completion Date:
Reason for
Modifications:
Approved/Implemented
By:
ModificationType of
❑ Major ❑ Minor
..Modification
Start Date:
Completion Date:
Reason for
Modifications:
Approved/Implemented
By:
Type of Modification..
❑ Major ❑ Minor
.. ification
Start Date:
Completion Date:
Reason for
Modifications:
Approved/Implemented
By:
ModificationType of
❑ Major ❑ Minor
..Modification
Start Date:
Completion Date:
Reason for Approved/Implemented
Modifications: By:
All About Plumbing - Building Addition

Storniwater Pollution Prevention Plan Permit No. NCGO 10000
SWPPP Soil
Stabilization Log
Name of Construction Site
Location of Construction Site
Type of Stabilization
Description
of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:
Type of Stabilization Description
of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:
Type of Stabilization Description
of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:Type
of Stabilization
Description
of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:
Type of Stabilization Description
of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCGO 10000
SWPPP Modification / • I •
Name of Construction Site Location of Construction Site
Type of Stabilization
Description of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional Inspection Frequency for
work proposed for Stabilized Area:
this area:
Type of St�abilizatic' Description of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:
Type of Stabilization
Description of Stabilization
Location of Stabillization"�
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:
Type of Stabilization
Description of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
Inspection Frequency for
work proposed for
Stabilized Area:
this area:
Type of Stabilization
Description of Stabilization
Location of Stabilization
❑ Final ❑ Temporary
Initiate Date:
Completion Date:
Additional
work proposed for
Inspection Frequency for
this area:
Stabilized Area:
All About Plumbing - Building Addition

Stormwater Pollution Prevention Plan Permit No. NCGO 10000
Appendix H Misc. Design Information/Cut Sheets
All About Plumbing - Building Addition

1INFAB112098 is manufactured using '+
igh tenacity polypropylene yarns that are
coven to form e dimensionally stable network,
ihich allows the yarns to maintain their relative position.
VINFAB111 2098 resists ultraviolet deterioration, rotting,
Ind biological degradation and is inert to commonly
!ncountered soil chemicals. It meets or exceeds the
egt.lirements of AASHTO M288 for Unsupported silt fence and
kSTM D6461 table 2;
Average Roll Val -
PRODUCT DATA SHEET
WINFAB'' 2098
I
"q
I1
1j I'I II t�,�l
tJl�,i I
t.
Dlschhnen WI1VA0 assumes no liability fol the comploleness or accuracy of 1111s hlfoll"auon or Tile u111n1a1e use of tills Infornlollon. WIhIFAB dlsclnlms any and all In1pIIet1,
expressed, or slalutoly slandatds, guarnnlees, or wannntles. Tills Includes without Ilntltallon any Inlplled Wanartly as to metcianlabillly or fitness for n parllculal pulpase or
arising front a course of dealing or usage of trade as to equlpnlenl, Iluilellals, or Infonnallon fwnished hereWlth. Tills document should not be construed as engineering n(lvlce,
Always constrll the project engineer for project specific tequliements. The end user assumes sole lesponsiblllty for the use of tills Information and product. The properly Values
listed above are subject to change Without 11011 ,
WIIJFAY",q Ir are tradert0rl(s of Wlllacoocllee Industrial Fabrics, Inc.
02021 W1110coocltee Industlal Fabrles Inc.
WIMI'AII I VANV) VIII(uhrU„t.l Ilrr
1 Nashvlllo Mills Rd. Nashvllln GA 3.1639
Pitt [phone] ' Fax; (J 12) 6311-6533
��� h1111a1s; cl: tl ; a7
r,.�= Wlor 2010

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See.tion 1605
DIVISION M
Ejz ()SJON CONTROL OL AND
ST,C'T'TON 1605
'T'EMPORARY STLT T{Ee NCE
1605--1 DESCRIPTION
Furnish material, construe(, maintain and remove temporary silt fence in locations shown in
the plans or in locations that require surface drainage to he filtered.
1605-2 MATERIALS
Refer to Division 10.
Item Section
Geotextile, Type 3 t056
(A) Posts
Provide steel posts with at least 5 feet long, l 3/8 inch wide measured parallel to the
fence and 1,25 Ibs, per foot in weight per length, Equip with an anchor plate with an area
of at least 14.0 square inches. Ensure a means of retaining fencing material in the desired
position without displacement.
(I3) \�Ioven Wire Felice
Provide woven wire fence at least 32 inches high with 5 horizontal wires, vertical wires
spaced 12 inches apart, 10 gauge top and bottom wires and 12 1/2 gauge Cor all other
wires.
(C) Attachment Device
Provide plastic ties, wire fasteners or other approved attachment device,
1605-3 CONSTRUCTION METHODS
Install in locations as shown in the plans or as directed,
Install wire and geotextile as shown in Roadmia), St(tn&w(l Dr whigs,
Geotextile may be used without the woven wire fence backing with a post spacing of 1101
more than 6 feet,
Install post inclined toward runoff source, at an angle of not more than 20, from vertical,
Mach geotextile to (he post with acceptable methods -
Overlap geotextile al least 18 inches at splice joints,
1605-4 MAINTENANCE AND REMOVAL
Maintain the silt fencc until the project is accepted or until (he fence is removed. Remove and
replace deteriorated or ineffective geotextile, Remove and dispose of silt accumulations in
accordance Gvith Section 1630 when necessary or as directed.
Leave silt Fence in place until site stabilization and remove at project completion, Removed
silt fence becomes the property of the, Contractor, Dress and seed and nmlch all areas where
silt fence is removed in accordance with Section 1660•
NCQO'1.2018 Standard Specifications 16-1

2
3
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8
9
10
II
12
13
Section 1606
IW-5 M.yASUREN NTAND PAVIAHNT
Tempormy Sill h'(Mce will be measured and paid in linear feet, accepted in place, along the
ground line of the fence. Temporary Silt i'enee; that requires removal and replacement clue to
general deterioration or ineffective geotextile will be paid at contract trait prices. Repairs to
the fence clue to carelessness or neglect on the part of the Con(ractor twill he ,it no cost to the
Department.
Sill Excavation will be measured and paid in accordance with Article 1630-3,
Seeding and Mulching will be measured and paid in accordance with Article 1660-8,
Article 104-5, pertaining to revised contract prices, will not apply to this item. No revision in
the con(Nact unit price will be allowed because of any overrun or underrun.
Payment will be made under;
Pay Item
Temporary Silt hence
Pay Unit
Linear Foot
SIB MON 1606
SPECIAL SEDIMENT CONTROL FENCE
14 1606-1 DESCRIPTION
15 Furnish materials, construct, maintain and remove special sediment cont-ol fence. Place
16 special sediment conb'oI fence as shown in the plans or as directed.
17 1606-2 MATERIALS
18 Refer to Division 10,
Item Section
Sediment Control Stone, Standard Size No. 5 or 57 IOM
19 (A) Posts
20 Provicle steel posts in accordance with Subarticle 1605-2(A),
21 (B) t/4" Havd)vare Cloth
22 Provide hardware cloth with I/4 inch openings constructed from 24 gauge wire.
23 (C) Attachment Device
24 Provide plastic ties, wire fasteners or other approved attachment device.
25 1606--3 CONSTRUCTION METHODS
26 Install hardware cloth and sediment control stone in accordance with Roadway Skmdard
27 Drawings, Attach hardware cloth to post with acceptable methods,
28 Ntlaintain the special sediment control fence until the project is accepted or until the fence is
29 removed. Remove and dispose of silt accumulations at the fence when so directed in
30 accordance with Section 1630,
31 1606-4 Mj-�,ASUI2EMENT AND PAYINI P,NI'
32 Silt Excavation will be measured and paid in accordance with Article 1630-1
33 1141, I-1crrchware Cloth will be measured and paid in accordance with At'ticle 1632-5,
34 Sediment Control Slone will be measured and paid in accordance with Article 1610.4,
16-2 NCDOT 2018 Standard Specifications

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•

For sustatnaare vegetatloq
Profile's 5 Fundamentals are the
Foundation to Sustainable Vegetation
Establishing sustainable vegetation and receiving
the earliest possible Notice of Termination (NOT) are
the goals of every project. Profile's 5 Fundamentals
are the surest way to get you there. Picking the
right erosion control material like Flexterra®
HP-FGM is just one of the 5 steps.
1. Assess and Create Optimal
4I Soil Conditions
Soil testing provides essential information to
determine what soil amendments, if any, are
required to assure a more favorable growing
environment for faster, more complete vegetative
growth and sustainable establishment.
N/ib2. Pick the Right Plant Species
It is essential to select plant species that are
adapted to the site conditions.
0 3. Select the Correct Erosion
e'— Control Material
The right cover protects both seed and soil,
and facilitates growth. Flexterra HP-FGM is
unsurpassed in delivering outstanding performance.
11 4. Ensure Proper Installation
w
Products must be installed in accordance with
manufacturer recommendations to maximize
their performance.
5. Follow -tip Inspections and
Maintenance Practices
Continual monitoring ensures all site compliance
issues are being addressed. Maintenance may be
required to mitigate unexpected challenges,
Profile provides valuable assistance for each
of these Fundamentals 2417—
beginning with FREE soil testing.
Visit profileps3.com.
FLEXTERRA° HP-FGMTM
Absolutely the Most Effective
Erosion Control Medium Available
Flexterra® HP-FGM"' stands alone as the ultimate erosion control and
revegetation product. Fine grading and extensive soil preparation are
unnecessary, allowing you to apply the product for immediate protection
and superior performance at reduced overall costs.
Flexterra HP-FGM Delivers:
o The highest germination and HARD ARMOR I
growth establishment of any
PIR
rolled or other hydraulically s,f is
REINFORCED VEGETATION sM Is
applied erosion control �fl
product available
sm�ss a
NATURAL VEGETATION Flexible Grow„�,,,,,,
o Greater than 99% erosion Medluij
control effectiveness
immediately upon application AlPromatli
0 100% biodegradable
Non -toxic and safe for even the
most sensitive environments
�ill�1�,�IL'4�r;ir•ull� i��idih
Superior erosion control across Profile's spectrum of products ensures reliable,
sustainable solutions for slopes, channels, shorelines, water management projects,
pipeline restorations, waste and fly ash containment sites, fine turf areas and
other environmentally sensitive sites.
Patented Technologies and Greener Components
Deliver Unmatched Performance
Flexterra HP-FGM combines both chemical and mechanical bonding techniques
to lock the engineered rnediurn in place and promote accelerated germination
with minimal soil loss. Greener from the inside out, here's what makes it work
so well:
r?
Revolutionary patented
Micro -Pore particles
optimize water and
nutrient retention
100% recycled, virgin
Thermally Refined®
wood fibers produce the
highest yield and coverage
per unit weight, and are
phyto-sanitized, eliminating
weed seeds and pathogens
W
L-A
100% non -toxic
biopolymers and water
absorbents enhance
erosion control
resistance and growth
establishment
100% biodegradable
interlocking fibers increase
mechanical bonding of
the matrix to provide
Immediate performance
upon installation

A Closer Look at Micro -Pore Particles and Thermally Refined' Wood Fibers
Fibers magnified 45 tines by independent
lab specializing In fiber analysis,
• Micro -Pore particles capture and hold moisture and nutrients, reduce soil surface
evaporation and improve oxygen exchange, which all contribute to faster, more
uniform vegetation establishment.
• Micro -Pore particles also increase bond strength of the flexible growth medium,
resulting in greater resistance to raindrop impact and sheet flow.
Inferior wood fibers magnified 45 times,
Nothing Keeps More Soil On Site
Flexterra® HP-FGM"' has demonstrated nearly perfect erosion control
performance — even on slopes as severe as 0.251-1:1 V. In addition to
minimizing soil loss, the turbidity of runoff is greatly reduced. In large
scale testing, Flexterra HP-FGM reduced effluent turbidity of sandy
loam soils to less than 250 Nephelometric Turbidity Units (NTUs).
Establishes Vegetation More Reliably
Quicker and complete establishment is the key to long-term
erosion control. Flexterra HP-FGM has recorded the highest growth
establishment rating of any erosion control product in independent
laboratory testing using standard test method ASTM D7322.
The First Erosion Control Product to
Offer Documented Functional Longevity
ASTM D5338 testing protocol confirms Flexterra HP-FGM's observed
functional longevity of up to 18 months. Flexterra HP-FGM is proven to
last longer than other hydraulically applied erosion control products,
Long-lasting Flexterra HP-FGM is designed to:
• Provide protection on bare soil over periods of dormancy;
assures that when more optimal growing conditions arrive, the seed
and nutrients are still in place and in an environment conducive to
rapid germination and emergence.
• Increase survivability of plants; exceptional water retention
nurtures vegetation to better withstand environmental stress.
• Accommodate a broad range of vegetative species; safeguards
and helps to cultivate even the slowest establishing species.
• 100% recycled, Thermally Refined® virgin wood chips
create fine, long and highly absorbent fibers that deliver
superior yield, coverage and water -holding capacity.
• Competitive refining technologies develop inferior fibers
that require more bales to achieve the coverage of Profile's
Thermally Refined wood fiber matrices. Additionally, claims
that competitive mulches save or use less water during
application just don't hold water.
EROSION CONTROL PERFORMANCE
-V - SBavilo 1on(� Doubled) t Profile' Bonded ppoo��,,bledle Ileatena'
Il,draulic lAulth Sbavr Blantet IiberlAaelc Evselsla Blan4el IIP•rul
Average Percent Effectiveness
Days
TYPICAL FUNCTIONAL LONGEVITY
500
400
300
—
zoo
100
0
i
SuavrlCot on
Ihdrau cAlulih
Profik'lVood lau Profde'rondedc I P{IS"3ma'
Llukhh I@er ,GLt'
Based on ASIM D5338 and field Observations

Flexterra® HP-FGM"' Technical Data:
PHYSICAL PROPERTIES*
Masstltnll Alca
ASTM D6566'
g1m, (ozlyd')
z 390 (11.6)
lhlckness
ASTM D6525'
mm (in)
z 5.6 (0.22)
Ground Cover
ASTM D6567'
%
z 99
Water -holding Capacity
ASTM D7367
%
z 1,700
Material Color
Observed
nla
Green
ENVIRONMENTAL PROPERTIES*
Biodegradability
ASTM D5338
nla
Yes
Ecotoxlcity
EPA 2021.0
%
48-hr LCw> 100%
Effluent Twbldity
Large Scale'
NTU
< 250
PERFORMANCE PROPERTIES*
Cover Factor'
Large Scale'
nla
s 0.01
Percent Effectiveness'
Large Scale'
%
z 99
Functional Longevity'
ASTM D5338
months
s 18
CrneTime
Observed
hours
0.2
Vegetation Establishment
ASTM D7322'
%
z 800
PRODUCT COMPOSITION
TYPICAL VALUE
thermally Processed' (within a pressurized vessel) 100% Recycled Virgin Wood Fibers
80%
Wetting agents (including high -viscosity colloidal polysaccharides, cross -linked biopolymers, and water absorbents)
10%
Crimped Biodegradable Interlocking Fibers
5%
Micro -Pore Granules
5%
* When uniformly applied at a rate of 3,500 Ib/ac (3,940 kglha) under laboratory conditions.
1. ASTM test methods developed for Rolled Erosion Control Products that have been modified to accommodate
Hydraulic Erosion Control Products.
2. Cover Factor Is calculated as soil loss ratio of treated surface versus an untreated control surface.
3. Percent Effectiveness = One minus Cover Factor multiplied by 100%.
4. Functional Longevity Is the estimated time period, based upon field observations, that a material can be
anticipated to provide erosion control and agronomic benefits as influenced by composition, as well as
site -specific conditions, including; but not limited to —temperature, moisture and light conditions, soils,
biological activity, vegetative establishment and other environmental factors.
5. Large Scale testing conducted at Utah Water Research Laboratory. For specific testing Information, please
contact a Profile technical service representative at 800-508.8681 (US and Canada) or International -
[phone].
6. Heated to a temperature greater than 380 degrees Fahrenheit (193 degrees Celsius) for 5 minutes at a
pressure greater than 50 psi (345 kPa).
Profile•
Solutions for your Environment'
GREEN DESIGN
ENGINEERING'"
EARTH -FRIENDLY SOLUTIONS
FOR SUSTAINABLE RESULTS"
Green Design Engineering"' is a holistic approach,
combining environmentally beneficial design and
ecologically sound products with agronomic and
erosion control expertise, to provide the most
effective, customized and cost-efficient solutions
for erosion control and vegetative establishment.
3 PSI, Profile's
unique online
PROFILE SOIL SOLUTIONS
8 0 F T W A R E project design
and management software, is the best place
to start applying The 5 Fundamentals"' to your
next project. The process begins with a FREE soil
test, and walks you through every Fundamental.
It's the only program of its kind that integrates
and compares a variety of technologies to your
specific project parameters, and provides complete
documentation including product specifications,
installation guidelines, CAD details and other
pertinent technical information. Get started by
visiting Prof i1ePS3.con1.
PROFILE Products LLC
750 W. Lake Cook Rd • Sulte 440
Find us on Buffalo Grove,IL60089.800.508.8601
profileproducts,com
facebook.com/proflleEVS 02018 PROFILE Products LLC, all rights reserved,
t® Profile, Flexlerra and Thermally Refined are registered trademarks of PROFILE Products I.I.C.
IECA Solutions (oryour Environment, HP-FGM, The 5 Fundamentals, GreenArmor System, ET-FGM, Flexible Growth Medium, ProMaldx,
Engineered Fiber Matrix, Green Design Engineering and Earth-Frlendly Solutions for Sustainable Results are trademarks of PROFILE Products I.I.C.
HP-02 02118

INSTALLED COST PER ACRE4
INCLUDING SEED,
FERTILIZER, AND LABOR
Flexterra'° dramatically reduces
overall costs. The savings are
even more dramatic when you
consider the extensive soil
preparation blankets require to
minimize voids and bridging over
the soil surface,
'Based an Installed rate at 3,500lb per acro.
Flexterra° bas consistently
outperformed any and all
competitive vegetated slope
protection technologies,
including Bonded Fiber
Matrices and Erosion
Control Blankets.
Flexible Slope Protection at the Lowest Overall Cost.
New Flexterra"' is a revolutionary component of Profile Erosion
Control Solutions (PECS"'), the industry's most comprehensive "
assortment of hydraulic mulch and erosion control blanket
technology combined with on -site expertise and unfailing ,
support, Like all products within the PECS arsenal, Flexterra"' is specifically
engineered to deliver optimum performance under demanding conditions,
Nothing controls soil erosion and accelerates seed germination like Flexterra,"
the ultimate hydraulically applied blanket, Patented technology creates a
Flexible Growth Medium"' (FGM"') that offers better protection on slopes than
rolled erosion control blankets (ECB) and bonded fiber matrix (BFM) products —
with the speed and cost savings of hydraulic seeding. Plus, it can be combined
with other erosion control technologies to accommodate a broad range of
conditions, At lower application rates, it can significantly and economically
Improve the performance of complementary technologies from straw blankets
to turf reinforcement mats (TRM).
Flexterra" is effective upon application. It requires no cure time to develop
Intimate soil contact. This engineered medium performs on slopes steeper than
2.5H;1V and remains effective even during sustained rainfall events, It can be
applied using all types of mechanically agitated hydraulic seeding equipment
over uneven terrain and rough seedbeds.
It Doesn't Just Perform, It Outperforms.
Nothing compares to the performance of Flexterra"' when evaluated by the
most prestigious slope erosion testing laboratories in North America, Flexterra"
performance has been proven.
Superior erosion control-0.0001 Cover (C) Factor from the Universal Soil Loss
Equation translates to 99,9% effectiveness —or near perfection.
Effective immediately —no cure time required,
Fastest turf establishment-1500% water holding capacity delivers more moisture
to the seedbed for better germination,
1/3 less expensive than blankets —less soil preparation is required,

44 .
1-Tj
10.'
0 -- , - -- ---
ECTC Test Method #20
--------------------------
Test Method
Lab Protocol4
-------------------
ASTM D64595
----------------------
---------------------------
Application Rate
---------------------------
3000 Ib/ac
- ----
- - 3500 Ib/ac ------
----3500 lb/ac
-------
Test Conditions:
Slope Gradlent
2.5H:IV
2HAV
3H:IV
Soil Type
sandy loam
clay sand
silty sand
Test Duratlon
I hr
3 successive —I hr
----------------------
1/2 hr
--------------------------
---------------------------
Rainfall Event
-------------------
5 in/hr
-------------------
2 in/hr
----------------------
G in/hr
--------------------------
---------------------------
Cover or'C"Factor?
0.0003
0.0001
---------•------------
0.0000
--------------------------
--o-----------------------
/o Effectiveness
------------------
99.97%
99.99%
99.34%

Blanket and BFM Comparisons Fall Flat,
Flexterra"' is an effective alternative to erosion control blankets and
BFMs. No straw or excelsior blanket alone can match Flexterra's" slope
protection, even on critical sites, The loft of the FGM"' matrix captures
moisture and creates more air space to enhance seedling emergence.
Flexterra'.' absorbs and holds 5 times Its weight in water, while standard
excelsior blankets retain only twice their weight, The beauty of Flexterra"',
however, is that it can be used a number of ways, For example, blankets
and turf reinforcement mats (TRMs) will perform better when a protective
layer of Flexterra'"' is first applied at a reduced rate before installation.
Independent testing proves that Flexterra"' significantly out -performs
excelsior and straw blankets as well as BFMs in preventing erosion. The
results speak for themselves;
NEARLY 100 TIMES LESS SOIL LOSS PER ACRE THAN BLANKETS AND BFMS.
FGM'° BFM** STRAW BLANKET EXCELSIOR BLANKET
.Faking Erosion Control to a Whole New Level.
Although BFM technology has its place, Flexterte FGM"' is engineered for
much tougher site and environmental conditions.
Select FGM"" if:
Select BFM if'
1 The site requires stronger mechanical
A chemical bond is strong enough
and chemical bonds to withstand
to meet slope severity and length
greater surface flow and/or severe slopes
, The required functional longevity of
Soil needs erosion protection for up
soil protection is G months or less
to one year
i The site demands Immediate erosion
protection and you need to eliminate
risk from impending weather
1 You need the fastest vegetation
establishment possible
1 You require a high factor of
design safety
The soil is dry and rain is not expected
within 48 hours after application
There is a high degree of certainty
heavy rains will not follow application
r You require a moderate factor of
design safety
Flexterra'° Excelslor Shaw
FGMI" Blanket Blanket
PROMOTES MORE COMPLETE SEED
GERMINATION THAN BLANKETS
Flexterra° not only provides
better immediate erosion control,
independent testing also proves
Flexterra'° provides better
long-term control through more
reliable and denser
vegetation establishment.
FGM" application rats 3,000lb par acro.
5' per hr. rain ovens on 2.511:IV slopo
for I hr. on sandy loam soil.
'Extrapolated from Utah rosoarch.
"Compotitivo BFM product

—+...somms— Wood Fillers
0 Interlocldng Fibers
Q Co -Polymer Gel
Crosslinlcind
Hydro -colloid
Tacicifier
NO CURE TIME REQUIRED
Testing proves that
Flexterram is 98% effective
two hours after application.
FGIVITM application rate 3,000lb par ac(o.
10•yoor storm event (2.1 Inches)
Son Diego Slate University Soil Erosion
Research Laboratory ISGSU/SERL)
The Right Chemistry Works Every Time.
Flexterra" uses patented technology combining both chemical and mechanical
bonding techniques to lock the engineered medium in place, Crimped
synthetic fibers, organic fibers and performance -enhancing additives form a
lofty, interlocking matrix that creates air space and water -absorbing cavities
which improve germination; reduce the impact of raindrop energy and
minimize soil loss. Superior chemistry means no cure time, which enables the
matrix to handle higher rates of surface flow energy from heavy rains —upon
application, Water-resistant tackifiers and flocculants chemically bond the
matrix to the soil surface,
LOSS Soil Loss Two Hours After Application
100Ib
ee m — 4 v BARE SOIL
FLEX1 ERRA" FGN'
601b
401b
20 IU
OIU -- —
Elapsed Time
inutes 0 20 40 60 80 100
Al
100%
a
°oho
rn
2%
FGM'H Bare Soil
Solves Problems on a Variety of Sites.
FGM"' has been used on projects ranging from rough ground and steep, rocky
slopes to moderate- or steep -graded fill slopes. It is also used in environmentally
sensitive wetlands and other wildlife areas not compatible with nettings. It has
proven itself in a broad array of applications:
DOT & Highway Projects
FGM"' can be applied quickly to small or
large areas with no cutting, trimming or
stapling involved. It has received DOT
approval on a growing list of states.
Mine Reclamation
FGM" exceeds the rigid environmental
standards that coine with abandoned
mined land (AML) reclamation projects.
Commercial and Residential
Construction
FGM" doesn't require stakes that pose
hazards and doesn't leave netting behind
that can interfere with mowing.
Golf Course Construction
FGM"' locks the soil and seed in place,
allowing grass to mature into a healthy,
dense cover at a fraction of the cost of sod.

Flexible Growth Medium"' Specification.
The Flexible Growth Medium" (FGM"') shall be a hydraullcally-applied, flexible erosion control blanket composed of long strand,
thermally processed wood fibers, crimped, Interlocking fibers and performance enhancing additives. The FGM'" requires no curing
period and upon application forms an Intimate bond with the soil surface to create a continuous, porous, absorbent and erosion
resistant blanket that allows for rapid germination and accelerated plant growth,
The FGM"' shall be Flexterra", as manufactured by Profile Products, LLC and shall conform to the property values listed below when
applied at a rate of 3500 pounds per acre (3900 kilograms/hectare).
PROPERTY11
P11 sical
Mass Per Unit Area
ASTM D-6566
11.5 oz/yd'
390 g/m'
Tlricklless
ASTM D-6525
0.19 in
4.8 nail
% Grotitld Cover
ASTM D-6567
99%
99%
Water Holding Capacity
Proposed ASTM
1500%
1500%
Flexural Rigidity (we()
ASTM D-6575
12 oz-yd
10,000 Ing-ern
Color (fugilive dye)
Observed
Green
Green
Endurance
Functionni Longevity
Observed
Up to I yr
Up to I yr
Performance
Cover Factor (6 in/hr event)
ECTC Test Method ill
0.0066
0.0066
% Effectiveness
ECTC Test Method 112
99.34%
99,34%
Shear Stress
ECTC Test Method 113
1 Ib/R'
48 Pa
One minus Cover or'C" Factor equals the %effectiveness.
INSTALLATION
Strictly comply with manufacturer's Installation Instructions and recommendations. Use approved hydro -spraying machines with fan -type
nozzle (50-degree tip). To achieve optimum soil surface coverage apply FGM" from opposing directions to soil surface.
Erosion Control and Revegetation:
Step One: Apply seed, fertilizer and other soil amendments with small amount of Flexterra for visual metering.
Step Two: Mix 50 lb of FGM" per 125 gallons (23 kg/475 liters) of water; confirm loading rates with equipment manufacturer.
SLOPEA1
0H to IV
3000 Ib/ac 3400 kg/ha
>3H to IV and 52H to IV
3500 lb/ac
3900 kg/lin
>2H to IV and 51 H to IV
4000 Ib/ac
4500 kg/IIa
> 1 H to IV
4500 lb/ac
5100 kg/hn
Below ECB or TRM
1500 Ib/ac
1700 kg/ha
As infill for TRM
3500 Ib/ae
3900 kg1ha
Consult comprehensive CSI formatted specifications for additional details.
PACKAGING
Bags: Net Weight - 50 lb, UV resistant plastic film.
Pallets: Weather-proof, stretch -wrapped with UV resistant pallet cover, 40 bags/pallet, I ton/pallet.
Your Trusted Partner in Soil Solutions -
Profile Products Is the world's largest producer of hydraulic mulch and hydraulic mulch additives, and a leader In erosion control and revegetation
science. Many of today's Industry standards were Innovations Introduced by Profile. Ow• leadership continues through aggressive research and
development, active support of trade associations, and education designed to advance the Industry's effectiveness and professionalism.
Prof ire-,
)bin' Trusted Pw'lner In SoH SOhillonS * F-03 � A
For technical Information call 1-868.325.6202. For distributor location and customer service call 1-800.366.1180,
02004 PROFILE Products LLC, all rights reserved. Flexterra and Flexible Growth Medium are trademarks of PROFILE Products LLC. U.S. Patent IPs: 5,942,029; 5,779,782: 5,74 1,832
750 Lake Cook Road - Suite 4,10 - Buffalo Grove, IL 60089
www,prolllcproclucts,conl

Profrle�
Solutions for your Environment'
Application / Loading Procedures
A. Strictly comply with equipment Manufacturer's
installation instructions and recommendations,
Use approved hydro -spraying machines with
fan -type nozzle (50-degree tip) whenever
possible to achieve best soil coverage. Apply
from opposing directions to assure 100% soil
surface coverage. Slope interruption devices or
water diversion techniques are recommended
according to the slope interruption limits table on
the back.
B . To ensure proper application rates, measure and
stake area. For maximum performance, apply
in a two-step process*:
1. Apply specified prescriptive agronomic
formulations along with 50% of seed with a
small amount of HP-FGM"' or ET-FGM" for
visual metering.
2. Mix balance of seed and apply HP-FGM
or ET FGM at a rate of 50 pounds per
125 gallons (see mixing section on the back
for details) of water over freshly seeded
surfaces. See loading chart on the back
and confirm loading rates with equipment
manufacturer. Do not leave seeded surfaces
unprotected, especially if precipitation
is imminent.
C. Fill 1/3 of mechanically agitated hydroseeder
with water. `Airn pump on for 15 seconds and
purge and pre -wet lines. Turn pump off.
D, Turn agitator on and load low density materials
first (i,e. seed).**
E. Continue slowly filling tank with water while
loading fiber matrix into tank.
F. Consult loading chart on the back to determine
the number of bags to be added for desired area
and application rate.
G. HP-FGM or ET FGM should be completely
loaded before water level reaches 75% of the
top of tank.
H. Top off with water and mix until all fiber is fully
broken apart and hydrated (minimum of
10 minutes — increase mixing time when
applying in cold conditions). This is very
important to fully activate the bonding additives
and to obtain proper viscosity,
I, Add fertilizer.
J. Shut off recirculation valve to minimize potential
for air entrainment within the slurry.
K. Slow down agitator and start applying with a
50-degree fan tip nozzle.
L, Spray in opposing directions for maximum
soil coverage.
*Depending oil site conditions, HP-FG11l or ET-FGM ntay be applied in a one-step process where all components
may be inixed together in single tank loads, Consult ►t,ith Maritifactitier for filrtlier details.
**Do not add tackifters or polyniet•s.

'L.oadirag Chart for Profll'o's HP-PGM anal,GT�FGM
Tank Size
II of 50-I1)
Displacomonl
2,500 Ib/acro
3,000 lb/acre
3,600 Ib/acro
4,000 Ib/acro
4,600 Ib/acro
Sq it
Acres
Sq It
Acres
Sq It
Acres
Sq it
Acres
Sq it
Acres
(gal)
bales
(Ib)
(gal)
260
2
100
280
1,742
0,040
1,452
0.033
1,246
0.029
1,089
0,025
960
0.022
500
4
200
560
3,485
0.080
2,904
0.067
2,489
0.057
2,178
0.050
1,936
0.044
760
6
300
040
6,227
0.120
4,366
0,100
3,734
0.086
3,267
0.076
2,904
0.007
1,000
0
400
1,120
6,970
0.160
5,808
0,133
4,978
0.114
4,356
0.100
3,872
0.089
1,600
12
600
1,eB0
10,454
0,240
0,712
0,200
7,467
0.171
6,634
01160
5,000
0.133
2,000
16
800
2,240
13,939
0.320
11,616
0,267
9,957
0.229
8,712
0.200
7,744
0.178
2,500
20
1,000
2,800
17,424
0.400
14,520
0,333
12,446
0,206
10,090
0,250
9,600
0.222
3,000
24
1,200
3,360
20,909
0.480
17,424
0,400
14,935
0.343
13,068
0.300
11,616
0.267
3,600
20
1,400
3,920
24,394
0.660
20,328
0,467
17,424
0.400
15,246
0.360
13,662
01311
41000
32
1,600
4,480
27,878
0.640
23,232
0,533
19,913
0.457
17,424
0.400
15,488
0,356
Additional Notes:
- For hose applications, 35 Ib/100 gal Is recommended,
o Rough surfaces (rocky terrain, cat tracks, ripped soils, etc.) may require additional product to achieve 100% coverage,
Be sure to allow for residual material in tank on subsequent applications,
Application Rates
SI Product Category fl) Length (m)
slope+bit7125
Slope Condition
English
s 4H to 1V
2500lblacre
2800 kglhectare HP-FGM 30
> 4H to 1V and <3H to 1V
3000lb/acre
3400 kg/hectare ET-FGM 3g
> 3H to 1V and e, 2H to 1V
3500 Ib/acro
3900 kgmoclare 'Listed slope interruption limits are for product applications on a 31-1:1V slope. For
> 2H to 1V and -� 1 H to 1V
4000 lb/acre
4500 kglhectaro application on steeper slopes, slope Interruption lengths may need to be decreased.
> 1H to IV'
4500 lb/acre
5100 kgmoclare
Below ECB orTRM
1500lb/acre
1700 kgmeclare
As Infill forTRM'
3500lb/acre
3900 kg/heclare
'IiP-FGM or ET-FGM recommended for slopes greater than 1HJV,
'Use only approved and tested TRMs to create the GreenArmor System
Visual Key for Proper Application
(Flexterra HP-FGM shown below)
Proper Application
Improper Application
I�+
3,000 Ib/acre
4.1 nun
tillcknoss
Profrle�
Soluttons/oryour Environment'
3,5001b/acre 4,000 Ib/acre
4,0 mm
thickness
PROFILE Products LLC
760 Lake Cook Road, Suite 440
Buffalo Grove, IL 60089
Flexterra' IIP-FGM [phone] CocoReX'ET-FGM
www.proffleproducts.com
U.S. Patont IN: 6,942.029; 6,779,702; 6,741,632; 6,360,470; 7,762,004
6.5 min
thickness
ESP -el 3/13

LAN D LO K® Product Data
LANDLOK® 450
LANDLOK® 450 turf reinforcement mat (TRM) features X38 technology that consists of a dense web of
interlocking, multi -lobed polypropylene fibers positioned between two biaxially oriented nets and mechanically
bound together by parallel stitching with polypropylene thread. The TRM is designed to accelerate seedling
emergence, exhibit high resiliency, and possess strength and elongation properties to limit stretching in a
saturated condition. Every component of LANDLOK® 450 is stabilized against chemical and ultraviolet
degradation which are normally found in a natural soil environment. Furthermore, the TRM contains no
biodegradable components.
LANDLOK® 450 conforms to the property values listed below and is manufactured at a Propex facility having
achieved ISO 9001:2008 certification. Propex performs internal Manufacturing Quality Control (MQC) tests that
have hPPn artrpdited by the Geosvnthetic Accreditation Institute - Laboratory Accreditation Program (GAI-LAP).
PROPERTY
TEST METHOD
ENGLISH
METRIC
ORIGIN OF MATERIALS
% U.S. Manufactured 100% 100%
PHYSICAL
Mass Unit Area 2
ASTM D-6566
10.0 oz/yd2
339 g/m2
Thickness 2
ASTM D-6525
0.50 in
12.7 mm
Light Penetration % Passing)2
ASTM D-6567
20%
20%
Color
Visual
Green or Tan
MECHANICAL
Tensile Strength 2
ASTM D-6818
425 x 350 Ibs/ft
6.2 x 5.1 kN/m
Elongation 2
ASTM D-6818
50%
50%
Resilient 2
ASTM D-6524
90%
90%
Flexibilit 2
ASTM D-6575
0.026 in -lb
30,000 mg-crn
ENDURANCE
UV Resistance % Retained at 1000 hrs 2 ASTM D-4355 80% 80%
PERFORMANCE
Velocity (Vegetated 2,3
Large Scale
18 ft/sec
5.5 nl/sec
Shear Stress (Vegetated 2,3
Large Scale
10 Ib/ft2
479 Pa
Mannin 's n Unve etated 2,4
Calculated
0.025
0.025
Seedling Emergence 2
ASTM D-7322
409%
409%
8ftx140ft
2.45mx42.7m
ROLL SIZES
16 ft x 140 ft
4.88 m x 42.7 m
16 ft x 348.75 ft
4.88mx106.3m
NOTES:
1. The property values listed above are effective 01/22/2020 and are subject to change without notice.
2. Values represent testing at time of manufacture and are shown as typical values.
3. Maximum permissible velocity and shear stress has been obtained through vegetated testing programs featuring specific soil types, vegetation classes, flow conditions, and failure criteria. These conditions
may not be relevant to every project nor are they replicated by other manufacturers. Please contact Propex for further information.
4. Calculated as typical values from large-scale flexible channel lining test programs with a flow depth of 6 to 12 inches.
Pro pex' ENGINEERED EARTH SOLUTIONS TV
DGEOSOLUTIONS
www.propexglobal.com
Propex Operating Company, LLC • 4019 Industry Drive - Chattanooga, TN 37416 • ph 800 6211273 • ph 423 855 1466
ARMORMAX', PYRAMAT', LANDLOK', X3'9, PYRAWALC, SCOURLOK'', GEOTEX', PETROMAT', PETROTAC', REFLECTEX` and GRIDPRO" are registered trademarks of Propex Operating Company, LLC.
This publication should not be construed as engineering advice. While information contained In this publication Is accurate to the best of our knowledge. Propex does not warrant its accuracy or completeness. The ultimate customer and user of the
products should assume sole responsibility for the final determination of the suitability of the information and the products for the contemplated and actual use. The onlywarranty made by Propex for its products is set forth in our product data sheets
for the product, or such other written waranty as may be agreed by Propex and individual customers. Propex specifically disclaims all other warranties, express or implied, including without limitation, warranties of merchantability or fitness for a
particular purpose, or arising from provision of samples, a course of dealing or usage of trade.
© 2020 Propex Operating Company, LLC

LANDLOKO 450 turf reinforcement mat (TRM) features X30 technology that consists of a dense web of crimped,
interlocking, multi -lobed polypropylene fibers positioned between two biaxially oriented nets and mechanically bound
together by parallel stitching with polypropylene thread. The TRM is designed to accelerate seedling emergence,
exhibit high resiliency, and possess strength and elongation properties to limit stretching in a saturated condition. Every
component of LANDLOK 450 is stabilized against chemical and ultraviolet degradation which are normally found in a
natural soil environment. Furthermore, the TRM contains no biodegradable components.
LANDLOK 450 conforms to the property values listed below' and is manufactured at a Propex facility having achieved
ISO 9001:2000 certification. Propex performs internal Manufacturing Quality Control (MQC) tests that have been
accredited by the Geosynthetic Accreditation Institute — Laboratory Accreditation Program (GAI-LAP). This product
NTPEP approved for AASHTO standards.
MARV2
PROPERTY TEST METHOD ENGLISH METRIC
ORIGIN OF MATERIALS
% U.S. Manufactured Inputs 100% 100%
% U.S. Manufactured 100% 100%
PHYSICAL
Mass/Unit Area
ASTM D-6566
10.0 oz/yd2
340 g/m2
Thickness
ASTM D-6525
0.40 in
10.1 mm
Light Penetration % Passing)
ASTM D-6567
20%
20%
Color
Visual
Green or Tan
MECHANICAL
Tensile Strength (Grab)
ASTM D-6818
400 x 300 lb/ft
5.8 x 4.3 kN/m
Elongation
ASTM D-6818
50% (max)
50% (max)
Resiliency
ASTM D-6524
90%
90%
Flexibility
ASTM D-6575
0.026 in -lb avg
30,000 mg -cm avg
ENDURANCE
UV Resistance ASTM D-4355 80 /°
% Retained 1000 hrs ° 80%
PERFORMANCE
Velocity' (Vegetated)
Large Scale
18 ft/s
5.5 m/s
Shear Stress Vegetated
Large Scale
10 lb/ft'
479 Pa
Manning's "n" Unvegetated)
Calculated
0.025
0.025
Seedling Emergence
ECTC Draft Method #4
409%
409%
ROLL SIZES 1 6.5 ft x 138.5 ft 1 2.0 m x 42.2 m
NOTES:
1. The property values listed are effective 04/2011 and are subject to change without notice.
2. MARV indicates minimum average roll value calculated as the typical minus two standard deviations. Statistically, it yields a 97.7%d degree of confidence
that any sample taken during quality assurance testing will exceed the value rdported.
3. Maximum permissible velocity and shear stress has been obtained through vegetated testing programs featuring specific soil types, vegetation classes,
flow conditions, and failure criteria. These conditions may not be relevant to every project nor are they replicated by other manufacturers. Please contact
Propex for further information.
4. Calculated as typical values from large-scale flexible channel lining test programs with a flow depth of 6 to 12 inches.
olpropex-Geotextile
TESTED.PROVEN.TRUSTED.
Systems www.geotextile.com
Propex Operating Company, LLC • 6025 Lee Highway, Suite 425 - PO Box 22788 • Chattanooga, TN 37422
ph 423 899 0444 • ph 800 621 1273 • fax [phone]
Geotex�, Landlok°, Pyramat°, X3", SuperGro�, Petromate and Petrotac are registered trademarks of Propex Operating Company, LLC.
This Nitficadon should not be construed as engineering ad ice. WhIe informafon contaned in this publication is accurate to the best of our umvtedge, Propex does not warrant its accuracy or completeness. The ultimate customer and user of the products
shoitd assume sole responsibility for the final detenNnatim of the sutabllty, of the Information and the products I& the contemplated and actual use. The only mtranty made by Propex far Its products Is set forth In our product data sheets forthe product, or such
other uten wananty as may be agreed by Propex and incividual customers. Propex specifically disclaims etl other warranties, express or implied, Inctudmg wflhout Inutation, wamenties of merchantability a ftness fa a particular purpose, or arising from
provision of samples, a course of dealing or usage of trade.
0 2011 Propex Operating Company, LLC

TURF
AT
CEMNET
LANDLOK0 PER ENDIOCULAR C ANNEOLRINS ALLATION
AND MAINTENANCE GUIDELINES
Thank you for purchasing the LANDLOK® Turf Reinforcement Mat (TRM) by Propex Operating Company, LLC (Propex). This
document provides installation and maintenance guidelines for LANDLOK used as channel armoring to increase channel
resiliency towards forces created by high velocities and shear stresses. LANDLOK provides permanent erosion protection on the
side slopes and/or bed of a channel.
Temporary securing pins (pins) are used during installation to hold LANDLOK in place. Pins also promote vegetation
establishment keeping LANDLOK in intimate contact with the soil.
LANDLOK is an engineered solution with a unique design for each specific project. While Propex has made every effort to
ensure general validity, this information should not be used for a specific application without independent professional
examination and verification of its suitability, applicability, and accuracy. The documentation provided herein is for general
information only, and is intended to present installation guidance only. Project specific contract documents take precedence
when pin placements are different than what is represented in this document. Depending upon the critical nature of the
structure to be armored, work restrictions may be in place such as limiting installation based on growing seasons, weather
patterns, etc. Work should be performed under the provisions set forth for the specific project. Propex Engineering Services is
available for support during installation to consult for solving constructability issues encountered in specific applications. Please
feel free to call our techincal support hotline at [phone].
BEFORE INSTALLATION BEGINS
• Coordinate with a Propex Representative: A pre -construction meeting with the construction team and a representative from
Propex is recommended prior to installation. This meeting should be scheduled by the contractor with at least a two week
notice prior to construction.
• Gather the Tools Needed: Tools that you will need to install LANDLOK include a pair of industrial shears to cut LANDLOK,
tape measure, and mallet or hammer.
• Determine Vegetation Establishment Strategy: The method of vegetation establishment should be determined prior to the
start of installation. Different vegetation establishment methods require different orders of installation. Refer to Establish
Vegetation for further guidance.
INSTALLATION OF LANDLOK FOR CHANNELS
PREPARE THE SITE
It is recommended during all stages of site preparation that disturbed soils remain unprotected for not more than a single day.
Depending on project size this may require progressive site preparation during installation.
1. Grade and compact the area in the channel where LANDLOK will be installed. The channel surface should be uniform and
smooth, having all rocks, clods, vegetation or other objects removed so that during LANDLOK Laydown, LANDLOK comes in
direct, intimate contact with the channel surface.
2. Prepare the area to be armored with LANDLOK by loosening the topsoil to promote better vegetation establishment. This
may be accomplished with a rotary tiller on slopes 3:1 or flatter. For slopes greater than 3:1, prepare topsoil in a safe
manner.
3. Excavate an Initial Channel (IC) trench a minimum of 12 in x 12 in (300 mm x 300 mm) across the channel at the
downstream end of the project (Figure 1). Deeper IC trench and/or hard armoring may be required for channels that have
the potential for scour.
Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 6211273 - www.propexglobal.com

' LANDLOK'
TRM
Figure 1: Initial Channel (IC) Trench
Page 2 of 13
4. Excavate a Crest of Slope (COS) trench a minimum of 12 in x 12 in (300 mm x 300 mm) along both sides of the installation.
Each COS trench must be a minimum of 3 ft (900mm) over the crest of the bank, preferably on a relatively flat surface
(Figure 2).
COMPACTED BACKFILL
3' MIN
(900 mm) (300mm)
LANDLOKTRM -J
�1 _��11
1�11 1 Fd EA — — (300mm)=
1=1 I I I=
—� _PIN ON 12" (300 mm) CENTERS_=�)
—1 j_i NOTE: SEED OR SOD ALL
DISTURBED AREAS
Figure 2: Crest of Slope (COS) Trench
5. Excavate a Terminal Channel (TC) trench a minimum of 12 in x 12 in (300 mm x 300 mm) across the channel at the
upstream end of the project (Figure 3). Deeper TC trench and/or hard armoring may be required for channels that have the
potential for scour.

LAN OLOK-
TRM
Figure 3: Terminal Channel (TC) Trench
6. If seeding, refer to Vegetation Establishment for additional considerations during site preparation.
LANDLOK LAYDOWN
Page 3 of 13
1. Starting with the downstream end of the site select one of the COS trenches to begin the LANDLOK Laydown process. To
ensure proper anchoring of the overlapped areas the proceeding roll width must be laid out before the current roll width can
be anchored with exception to the final roll width at the TC trench. For straight sections of a channel, LANDLOK panel
lengths should be long enough to construct both COS trenches while also covering the surface of the channel being
armored. (Figure 17) Panel edges should rest perpendicular to the channel center line. For best results, panels of
LANDLOK should be continuous and free from seams or roll end overlaps that are parallel to the centerline of the channel.
Panel edge overlapping should follow a pattern of placing each proceeding panel's edge overtop the previous panel edge,
shingling the panels in the direction of the water flow.
FLOW OF WATER OR
DIRECTION OF PREVAILING WIND
IC TRENCH
LANDLOKTRM
I=1 I I -I I -III -I I I I I-III-III-111-I 11-
III,-_�III_III=III=III
;Illii�llli17
Figure 4: Initial Channel (IC) Trench Alignment
FLOW OF WATER OR
DIRECTION OF PREVAILING NAND
IC TRENCH
1�1 L1AiNDL�OKITTRTM
I I -III -III I I 1-I -!r-- -1 I I -I I
1=111=111=111- I-III=1 I I-- I II I I
'-III-PIN' l�-1 I-111-111 I IV "
-III-III-III=1 I I-
'i�=1!I 111-
Figure 5: Initial Channel (IC) Trench Placement
2. Lay the LANDLOK panel on the downstream side of the IC trench (Figure 4). Place the panel edge in the IC trench, ensuring
full coverage along the bottom of the entire IC trench with the LANDLOK (Figure 5).
Secure LANDLOK with pins in the IC trench (Figure 5). Pins should be made of steel with a 0.20 in (5 mm) minimum
diameter, having a 1.5 in (38mm) diameter washer at the head, and a length between 12 and 24 in (300-600 mm) with
sufficient ground penetration to resist pullout (Figure 6). Longer pins may be required for looser soils. Heaver metal stakes
may be required in rocky soils. Suggested placement of pins for the IC trench is along the bottom of the trench with pins on
12 in (300 mm).

•••' LAND LOK"
1.5" (38 mm) DIAMETER
STEEL WASHER
0.20" (5 mm)
DIAMETER STEEL
12-24"
Figure 6: Securing Pin
4. Backfill and compact the IC trench (Figure 5).
Page 4 of 13
Fold the LANDLOK panel over the top of the compacted IC trench (Figure 7) and place each panel end into the respective
COS trenches.
6. Place the next LANDLOK panel by laying the LANDLOK roll so that the roll end points towards the COS trench (Figure 9), with
a 3 inch (75 mm) overlap created at adjacent panel edge locations. Ensure that adjacent panel edges maintain a minimum
3 inch (75 mm) overlap during LANDLOK Laydown. (Figure 13)
FLOW OF WATER OR
DIRECTION OF PREVAILING WIND
LANDLDK TRM
IC TRENCH
I-I11 111 I
11-III III - III-III=I
� I
III=PIN, 1 I f=1 I I -I 11- I I I
"-III��I�-II!I�illl=
Figure 7: Initial Channel (IC) Trench Complete
FLOW OF WATER OR
DIRECTION OF PREVAILING WIND
LANDLOK TRM
ROLL EDGE IC TRENCH
OVERLAP
WiIII-III :III -I
1I-
Figure 8: Initial Channel (IC) Trench Complete and
Overlapped
4. Secure LANDLOK with pins in the COS trench (Figure 10). Suggested placement of pins for the COS trench is along the
bottom of the trench on 12 in (300 mm) centers. Pins should also be installed on panel edge overlaps in the COS trench.
Figure 9: Crest of Slope (COS) Trench Alignment
OFPropex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 6211273 - www.propexglobal.com

0-111.0"' L A N D L 0 K -
Figure 10: Crest of Slope (COS) Trench Placement
Figure 11: Perpendicular Placement of LANDLOK across Channel
5. Backfill and compact the COS trench in the location of the first LANDLOK panel only (Figure 10).
Page 5 of 13
6. Unroll the LANDLOK roll on the channel surface in the area to be armored. (Figure 11) Ensure that LANDLOK has intimate
contact with the ground and all irregular surfaces beneath LANDLOK are removed.
7. Secure LANDLOK panels in place using pins across the channel surface according to the project's engineered design. Pin
placement should reflect a staggered checkerboard pattern across the channel surface for best results (Figure 12 and
Figure 13).
• Roll edges shall be overlapped a minimum of 3 in (75 mm) with pins placed on 12 in (300 mm) centers (Figure 1.3).
i i 1.25'
i (375 mm)
---+-----+-----4---
i
LANDLOK TRM
OFFSET PINS i tl-}{-F
TO CREATE A ------+----------
CHECKERBOARD
PATTERN
2'
(600 mm)
4'
Figure 12: Example Pin Pattern
Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 6211273 - www.propexglobal.com

LAN D LO K°
FLOW OF WATER OR
4' TYPICAL -� DIRECTION OF PREVAILING WIND
(1.2 m)
PINS ON 12" CENTERS ON
y 3" OVERLAP MIN ROLL EDGE OVERLAPS
(75 mm)
5' TYPICAL
(1.5 m )
OFFSET PINS AS SHOWN TO
CREATE A CHECKERBOARD PATTERN
PIN
Page 6 of 13
Figure 13: Example Edge Overlap Pattern
• Roll ends shall be overlapped a minimum of 6 in (150 mm) with upstream panel on top. Secure roll end overlaps with
two rows of pins staggered 6 in (150 mm) apart on 12 in (300 mm) (Figure 14)
NOTE: LANDLOK 450 SHOULD BE SHINGLED IN
THE DIRECTION OF THE DOWN SLOPE AND FLOW
TOP OF SLOPE / UP STREAM
LANDLOK TRM
COVERED END
FLOW OF WATER OR PIN
DIRECTION OF 1' MAX
PREVAILING WIND '1 Y (300 mm)
6" MIN
(150 mm)
ROLL EDGE OVERLAPPING END
BOTTOM OF SLOPE / DOWN STREAM
• PIN
Figure 14: Roll End Overlap
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LANDLOK-Page 7 of 13
TRM
• For channel bank heights or channel bottom widths greater than 45 ft (13.7 m), install simulated check slots. This
method includes placing two rows of pins 12 in (300 mm) apart on 12 in (300 mm) centers at 45 ft (13.7 m) maximum
intervals or across the midpoint of the slope for slope lengths less than 60 ft (18.2 m) (Figure 15).
LANDLOKTRM
45' MAX OR NEAR MIDPOINT OF
• V MAX
• (300 mm)
r
PIN
V MAX
(300 mm)
Figure 15: Simulated Check Slot
• At the break in slope interface towards the channel bed, it is suggested that Pins be installed on 12 in (300 mm)
centers (Figure 16).
Figure 16: Break in Slope Interface
8. Secure LANDLOK with pins in the opposite COS trench. Suggested placement of pins for the opposite COS trench is along
the bottom of the trench on 12 in (300 mm) centers (Figure 17).
9. Backfill and compact the opposite COS trench in the location of the first LANDLOK panel only (Figure 17).
Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 6211273 - www.propexglobal.com

(oF'LAN DLO K'
M
Figure 17: Crest of Slope (COS) Trenches Complete
Page 8 of 13
10. Continue to work down the length of the channel by repeating steps 6 through 9 overlapping each adjacent LANDLOK panel
by 3 inches (75 mm) (Figure 13).The last LANDLOK panel should terminate on the Terminal Channel (TC) trench with pins
on 12 in (300 mm) centers
11. Lay the last LANDLOK panel on the upstream side of the TC trench (Figure 18). Place the panel edge in the TC trench,
ensuring full coverage along the bottom of the entire TC trench with the LANDLOK (Figure 19).
12. Secure LANDLOK with pins in the TC trench. Suggested placement of pins for the TC trench is along the bottom of the
trench with pins on 12 in (300 mm) centers (Figure 19).
FLOW OF WATER OR
DIRECTION OF PREVAILING WIND
TC TRENCH
LANDLOKTRM
-I I I -I I III I I -I 11- I I I I I-III-III=1 I I-1
' -�Ti -i I I-111=III-III-I I_I-1 I_I-I 11- '
-1 I I-III-III=III-� I I
111,�1111111111-'�
Figure 18: Terminal Channel (TC) Trench Alignment
13. Backfill and compact the TC trench (Figure 19).
FLOW OF WATER OR
DIRECTION OF PREVAILING NAND
TC TRENCH
IANDLOKTRM
f1=T = �Il�T1=1Tl-TIT._='
"�-III-1 I I-III=I I II , I 1
-I I I=I --I I I -PIN 1-I I
li ;'Illllllllii�ll�_ �„
Figure 19: Terminal Channel (TC) Trench Placement
14. Fold the LANDLOK panel over the top of the compacted TC trench (Figure 20) ensuring a minimum 3 inch (75 mm) overlap
and place each panel end into the respective COS trenches.
FLOW OF WATER OR
DIRECTION OF PREVAILING WIND
LANDLOKTRM
TC TRENCH
ROLL EDGE
OVERLAP
f1=--.T-11=ITi=M = >_TFmm=ri r
-I 11=1-1 1111=1 I-I� i-1 1=Ti-1
-I I-1 I I- I I PIN, I I= �
-
III
-
Figure 20: Terminal Channel (TC) Trench Complete

L A N D L 0 K°
;;41► Page 9 of 13
e4'
AM
15, At a minimum, LANDLOK panels should be pinned entirely across the channel surface, pins should be installed in the
trenches, and the trenches should be backfilled and compacted at the end of each day to minimize rework in the case of a
major rain event. Specific project conditions may warrant further evaluation of installation order for ease. An example
isometric view (Figure 21) of a channel armored with LANDLOK can be seen below for overall reference. Consult Propex
G11g'I I ICC I I I Ig OUIVIGCS dL 0VV.VLI..1L I J WILTl c ly quCJUVl1z1 U Idl
PIN
TERMINAL CHANNEL
TRENCH
yUU may IICIVG.
LANDLOK 450
COMPACTED
BACKFILL
TOP OF BANK
- ANCHOR TRENCH
FLOW OF WATER OR
TOP OF BANK DIRECTION OF PREVAILING WIND
ANCHOR TRENCH
COMPACTED _,..__.._._.
BACKFILL - ...._.................. • _
PIN
LANDLOK 450
ANDIOK TRM
BREAKINBLOPE
INTERFACE DETAIL W OVERLAP MIN
OVERLAP AT = _.__�_. ._. _... ..:�..• ITS—)
ROLL EDGE _ •, 1 '�
Figure 21: Completed Channel Isometric View
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LANOLOK' Page 10 of 13
TRM
ESTABLISH VEGETATION
Vegetation can be established with LANDLOK by broadcast seeding, hydraulic seed application (hydroseeding), or sodding. Seed
application rate, seed type, sod type, and irrigation rate should be selected based on local or site specific knowledge and time of
year. For best results, consider having a site specific soil test performed to help determine what soil amendments, such as lime
and fertilizer, need to be incorporated into the soil to promote healthy vegetation.
Irrigate as necessary to establish and maintain vegetation until 75% of vegetation has established and has reached a height of
2 inches. Frequent, light irrigation will need to be applied to seeded areas if natural rain events have not occurred within two
weeks of seeding. When watering seeded areas, use a fine spray to prevent erosion of seeds or soil. Do not over irrigate. Proper
irrigation guidance is provided under the Maintenance portion of this document.
CONSIDER PROJECT SPECIFIC NEEDS
1. A deeper trench and/or hard armoring may be required when channels have severe scour potential at IC and TC trenches.
2. For installing LANDLOK panels around curved sections of a channel, trim panels at an angle so that no more than two layers
of LANDLOK overlap at any point in time. Additional pins may be needed to secure panel edges towards the break in slope
interface depending upon the radius of the curved channel. Install pins as necessary to securely fasten LANDLOK to the
ground.
3. Vehicular traffic should not be allowed on LANDLOK at anytime.
4. Disturbed areas should be reseeded. If ruts or depressions develop for any reason, rework soil until smooth and reseed or
sod such areas.
SHORT-TERM AND LONG-TERM MAINTENANCE OF LANDLOK
The purpose of this section is to provide some general guidelines for performing short-term and long-term maintenance of
LANDLOK with respect to maintaining vegetation reinforced with LANDLOK, and patching of LANDLOK (in the event it needs to
be removed or replaced). These procedures are to be considered minimum guidelines for proper maintenance, and further
maintenance techniques may be appropriate considering local practices and procedures.
LANDLOK PROTECTED CHANNEL
For LANDLOK to be most effective, it is important to ensure that it is properly maintained both during construction and after
construction. Identifying trouble areas is easy with LANDLOK, and it can make identifying potential threats much simpler and
manageable. Look for areas with sparse, dying, or no vegetation as these are obvious signs that LANDLOK is losing intimate
contact with the channel surface. If loss of ground surface occurs, LANDLOK will need to be removed and reinstalled as
described in Patching and Repairs Section after the eroded area is backfilled with compacted soil that is similar to material of
the channel. After LANDLOK is reinstalled, re-establish vegetation on the newly installed LANDLOK and disturbed areas. Monitor
the sites to determine if frequent watering may be required to establish vegetation.
To minimize exposure to unwanted maintenance and repair, LANDLOK armored channels should be free of vehicular traffic.
Routine maintenance and channel inspections should be performed by foot traffic only. Tracked equipment such as skid steers,
excavators, or dozers should only be allowed to traffic over LANDLOK in times of emergency after vegetation establishment is
complete. Failure to control unauthorized traffic can result in LANDLOK being damaged resulting in erosion below LANDLOK
during storm events.

LANDLOK" Page 11 of 13
AM
MAINTAINING VEGETATION
Good vegetative cover will ensure maximum performance of LANDLOK. Vegetative cover care starts before a project is complete
and is ongoing until all LANDLOK is installed. Vegetative cover should be given every opportunity to grow and establish well.
This will require that a contractor periodically fertilize and water the grasses as needed until a project is complete in the short-
term, with the owner of the slope fulfilling the maintenance of the slope in a similar fashion for the long-term. For the entire
lifecycle of LANDLOK, every effort must be made to prevent unauthorized encroachments, grazing, vehicle traffic, the misuse of
chemicals, or burning during inappropriate seasons.
1. After the installation of vegetation is complete, immediately water and soak the entire area using a fine spray to prevent
erosion and loss of seeds. A suggested amount of water is identified below. Prior to installation if using sod, the sod pads in
storage should be kept moist at all times and not stored for more than 24 hours from site arrival to installation. Warmer
weather will necessitate more frequent applications than listed below.
A. For each reach/segment of installed vegetation, watering shall be conducted immediately after each installation or the
day's work.
B. For initial vegetation establishment, water vegetation in a manner consistent with best practices for vegetation type
and location.
C. Establish a watering schedule and follow until vegetation is well established and will thrive in the absence of manual
watering.
D. Avoid excessive application of water, so that surface runoff does not occur. Runoff should be prohibited. However,
additional watering may be required for repaired or damaged areas.
2. Fertilizer should be applied as needed to address any nutrient deficiencies revealed in soil testing.
3. Mowing over LANDLOK is not permitted at anytime.
PATCHING AND REPAIRS
LANDLOK may require localized repair at times. For emergency repairs, an adequate supply of LANDLOK should be maintained
in inventory with the necessary tools to install. This will allow for a timely, initial repair of the system.
1. In order to identify areas in need of repair, the site should be patrolled immediately after rain events of 2 inches or more.
When patrolling look for areas of sparse vegetation, exposed edges of LANDLOK, and areas where direct contact between
LANDLOK and the channel surface is compromised. LANDLOK should be rated as Acceptable, Minimally Acceptable, or
Unacceptable during inspection.
A. Acceptable (A) - The rated area is in satisfactory, acceptable condition, and will function as designed and intended
during the rain event. LANDLOK has no exposed edges, is installed tightly by maintaining direct contact to the channel
surface with no rilling beneath, and has over 90% vegetation cover. There is no noticeable damage present.
B. Minimally Acceptable (M) - The rated area has a minor deficiency that needs to be corrected. The minor deficiency will
not seriously impair the functioning of the area during the next rain event; however, the overall reliability of the project
will be lowered because of the minor deficiency. LANDLOK has 75% vegetation cover with.un-vegetated patches as
large as one square yard. Edges of LANDLOK are exposed with noticeable damage. Minimal erosion has occurred
underneath LANDLOK.
C. Unacceptable (U) - The rated area is unsatisfactory. The deficiency is so serious that the area will not adequately
function in the next rain event. LANDLOK has been physically torn, ripped, or lifted from the channel surface. Less than
Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 6211273 - www.propexglobal.com

LANOLOKO Page 12 of 13
TRM
75% vegetation cover is present with un-vegetated patches being greater than 1 square yard, and there is evidence
that erosion is occurring beneath LANDLOK.
2. Repair any raised or exposed edges of LANDLOK by driving existing and additional pins along the edges as necessary to
securely fasten to the ground. Inspect areas where the vegetation is not growing on top of LANDLOK. Many times this is an
indicator that LANDLOK has lost contact with the ground beneath. Check for voids beneath LANDLOK and fill any holes,
gullies, etc. with compacted fill material if possible. Replace LANDLOK as described below.
3. To repair LANDLOK, cut out and remove damaged areas in a square configuration a minimum size of 2 ft by 2 ft. Remove all
vegetation and debris atop of LANDLOK. Loosen the top 1 to 2 in of soil in the patch area then seed. The subgrade of area
to be patched shall be prepared to be smooth and uniform and transition smoothly into the in -situ area. Cut a square
LANDLOK patch a minimum of 12 in greater than the damaged area for all four sides of the patch. Overlap the patch area
in all directions a minimum of 12 in. The patch overlaps shall be tucked under the existing damaged LANDLOK material
(Figure 22 and Figure 23).
Figure 22: LANDLOK Patch Cross Section
/
B IN MAXIMUM
CENTER ON CENTER/
•
• YMINIMUM
i
81N MAXIMUM
CENTER ON CENTER
/
• •
12' MINIMUM
AREA OF,
DAMAGED
/LANDK450
YMINIMUM
1YMINIMUM
• PIN
Figure 23: LANDLOK Patch Plan View
4. Install pins on 6 in (150 mm) (max) centers. For larger areas of damage, anchors should be installed to match existing
anchor pattern. Once LANDLOK is in place, vegetate per project specifications.

$'• L A N D L O K° Page 13 of 13
TRM
SUMMARY
Maintenance should consist of watering and weeding, repair of all erosion, and any re -seeding as necessary to establish a
uniform stand of vegetation during construction and beyond. A minimum of 70% of the armored area should be covered with no
bare or dead spots greater than 10 ft2 (1 m2). Throughout the duration of the project, the Contractor should water all grassed
areas as often as necessary to establish satisfactory growth and to maintain its growth throughout the duration of the project.
After the project is complete, it is the responsibility of the Owner to maintain and upkeep all LANDLOK installed areas for long
term performance and best results as described herein for superior slope armoring.
Propex Operating Company, LLC - 4019 Industry Drive, Chattanooga, TN 37416 - p 800 6211273 - www.propexglobal.com

Stormwater Pollution Prevention Plan Permit No. NCGO10000
Appendix I Vegetated Conveyance Agreement
All About Plumbing - Building Addition

Operation 8, Maintenance Agreement
Project Name: All About Plumbing
Project Location: 5521 Old Haywood Road, Suite 1, Mills River, NC 28759
C0Veu•+Page
Maintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location.
Any deficient SCM 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 pollutant removal efficiency of the SCM(s).
The SCM(s) on this project include (check all that apply & cc
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Bioretention Cell
Quantity:
Wet Pond
Quantity:
Stormwater Wetland
Quantity:
Permeable Pavement
Quantity:
Sand Filter
Quantity:
Rainwater Harvesting
Quantity:
Green Roof
Quantity:
Level Spreader - Filter Strip
Quantity:
Proprietary System
Quantity:
Treatment Swale
Quantity:
Dry Pond
Quantity:
Disconnected Impervious Surface
Present:
User Defined SCM
Present:
Low Density
Present:
ding O&M sheets will
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Type:
be aciciea automaticaiin
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each SCM above, and attached O&M tables. I agree to notify NCDEQ of any problems with the system or prior to any changes to
the system or responsible party.
Responsible Party:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email:
All About Plumbing
Caleb Wilson
5521 Old Haywood Rd
Mills River, NC 28759
828-778-2425
[e-mail]
II /
Signature: / �---� Date: I 7 �.
I, lsaa( 'DA,l- yry-, a Notary Public for the State of x6m., o4-rDi 1�
County of Rellat-ts &'. do hereby certify that Cje,6 W J 1 su-)--..-
personally appeared before me this —T�'"day of NOVGYr��r- �2() 2 Z and
acknowledge the due execution of the Operations and Maintena ce Agreement.
Witness my Land and official seal, _t444&
?a/
My commission expires dow." a3i
STORM-EZ 11/16/2022
Version 1.5 O&M Agreement Page 1 of 1

Low Density 1111aintena.nce Requirements .
Important maintenance procedures:
The drainage area to the vegetated conveyance or vegetated receiving area will be carefully
managed to reduce the sediment load to the vegetated conveyance or vegetated receiving area.
After the initial fertilization to establish the grass in the vegetated conveyance or the vegetated
receiving area, fertilizer will not be applied to the vegetated receiving areas,
The vegetated conveyance or vegetated receiving area will be inspected quarterly. 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.
SCM element:
Potential problem:
How to remediate the problem:
Vegetation is too short or
Maintain grassed vegetation such that the swale or vegetated
Vegetation
too long.
area does not erode during the peak flow from the 10-year
storm
Trash/debris is present.
Remove the trash/debris.
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then re -
Vegetated receiving
erosive gullies have
sod (or plant with other appropriate species) and water until
formed.
established. Provide lime and a one-time fertilizer application,
areas
Trees and/or other woody
Remove the trees and woody vegetation from the swale,
vegetation are present in
regrade the swale if necessary and re-establish grass as shown
the swale.
on the approved plans.
Trash/debris is present.
Remove the trash/debris.
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then re -
erosive gullies have
sod (or plant with other appropriate species) and water until
formed,
established. Provide lime and a one-time fertilizer application.
Sediment covers the grass
Remove sediment and dispose in an area that will not impact
Vegetated conveyances /
at the bottom of the swale.
streams or SCMs. Re -sod if necessary.
swales / roadside
ditches (other than curb
The side slope is steeper
Regrade the slopes to the permitted configuration per the
outlet swales)
than the approved
approved plan and reestablish vegetation. If as built or existing
configuration.
conditions do not allow the slopes to be regraded, contact the
applicable permitting agency.
Determine the source of the problem: soils, hydrology, disease,
Grass is dead, diseased
etc, Remedy the problem and replace plants. Provide a one -
or dying,
time fertilizer application to establish the ground cover if
necessary.
Trees and/or other woody
vegetation are present in
Remove the trees and woody vegetation from the vegetated
the vegetated
conveyance, regrade the vegetated conveyance if necessary
and re-establish grass as shown on the approved plans,
conveyance.

Clogging has occurred.
Clean out the outlet device. Dispose of the sediment off• -site.
The outlet device (if
The outlet device is
applicable)
damaged
Repair or replace the outlet device.
Erosion or other signs of
damage have occurred at
Repair the damage and improve the flow dissipation structure.
the outlet.
Discharges from the site
The receiving water
are causing erosion or
sedimentation in the
Contact the local NCDEQ Regional Office,
receiving water.