NCS000467_OTHER_20121031

NORTH CAROLINA .�
Department of Environmental Qua!

STORMWATER DIVISION CODING SHEET
MS4 PERMITS
PERMIT NO. /v � � o U c zi 6
DOC TYPE ❑FINAL PERMIT
fl ANNUAL REPORT
0 APPLICATION
❑ COMPLIANCE
L9'10�HER
DOC DATE
00
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YYYYMMDD

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- Golder
Associates
October 23, 2012 q
Mr. Hilary Thornton
United States Environmental Protection Agency _
Region IV
Atlanta Federal Center
4WD-SRSEB, 111h Floor
61 Forsyth Street, SW
Atlanta, GA 30303-8960
Mr. Danny Smith
North Carolina Department of Environment and Natural Resources
Division of Water Quality
3800 Barrett Drive
Raleigh, NC 27609
Mailing Address: 1628 Mail Service Center
Raleigh, NC 27699-1628
RE: REACH A 2012 VISUAL AND VEGETATION MONITORING
WARD TRANSFORMER SUPERFUND SITE, RALEIGH, NORTH CAROLINA
Dear Mr. Thornton and Mr. Smith:
184D FIN 203
On behalf of the Ward Transformer Site Trust (Trust), Golder Associates Inc. (Golder) submits the results
of the visual and vegetation monitoring of the riparian vegetation in the West Area and the constructed
drainage channel of Reach A (collectively called Reach A) at the Ward Transformer Superfund Site,
Raleigh, North Carolina.
MONITORING PERFORMED DURING 2012 REPORTING PERIOD
Reach A monitoring was conducted in 2012, as shown in the table below:
Month
Description
May
Visual Site Monitoring and Vegetation Monitorin
July
Visual Site Monitoring
Se tember
Visual Site Monitoring and Vegetation Monitoring
Visual site monitoring included walking the Reach A rip rap channel and its riparian zone to identify points
of potential concern and to photo -document the conditions at the site. During the May 2012 visual
monitoring Golder observed rill erosion along the northern side of Step Pool #1. The erosion was
repaired the same month. During the September monitoring event, the repaired area appeared to be
stable with no signs of recurring erosion. Monitoring reports are provided in Attachments 1 to 3, which
include photographs of the site conditions.
Vegetation monitoring included counting surviving planted trees and estimating the areal coverage of
herbaceous vegetation using six (6) fixed vegetation plots (each 50 feet by 50 feet, approximately 0.06
acres in size) established in September 2011. Because of low -survivability monitored in September 2011,
an additional vegetation monitoring event was conducted in May 2012 as indicated in the November 14,
2011, letter to EPA and NCDENR. Locations of the monitoring plots as well as photograph locations are
provided in Figure 1.
Golder Associates Inc.
3730 Chamblee Tucker Road
Atlanta, GA 30341 USA
Tel; [phone] Fax: [phone] www.goider.com
Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America
t Jov

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Ward Transformer Superfund Site Reach A Monitoring October 23, 2012
Mr. Hilary Thornton and Mr. Danny Smith 2 053-3184D
For the May 2012 event, the number of surviving planted trees and the areal coverage of herbaceous
ground cover estimated within the monitoring plots are summarized in the table below. The table also
provides the calculated surviving tree stocking density per acre.
Plot No.
Herbaceous
Ground
Cover
Number of
Surviving
Planted Trees
Number of
Volunteer
Trees
Calculated
Tree Density
per Acre
Percentage to
Stocked Density of
500 per Acre
1
100%
16
75
500+
100%
2
98%
6
10
279
56%
3
100%
8
-
139
28%
4
95%
17
-
296
59%
5
95%
10
-
174
35%
6
95%
6
-
105
21%
Averse
97%
11
14
249
50%
In May 2012 the average of the numbers of trees found in the plots was approximately 249 trees per acre,
which is approximately 50 percent of the original planned density of 500 per acre. The planted bare root
species that have better survivability are tulip poplar (Liriodendron tulipifera), black oak (Quercus
velutina), red maple (Ater rubrum), red bud (Cercis canadensis), and sweet gum (Liquidambar
styraciflua). Red maples and loblolly pines (Pinus taeda) are sprouting voluntarily. Compared to the
September 2011 monitoring event, the average herbaceous ground cover increased from 68% to 97%.
For the September 2012 event the number of surviving planted trees and the areal coverage of
herbaceous ground cover estimated within the monitoring plots are summarized in the table below.
Plot No.
Herbaceous
Ground
Cover
Number of
Surviving
Planted Trees
Number of
Volunteer
Trees
Calculated
Tree Density
per Acre
Percentage to
Stocked Density of
500 er Acre
1
95%
14
97
500+
100%
2
98%
3
31
500+
100%
3
100%
8
1
157
31%
4
95%
17
-
296
59%
5
95%
7
1
139
28%
6
95%
4
-
70
14%
Averse
96%
9
22
280
55%
In this monitoring event, the average of the number of trees found in the plots was approximately 280
trees per acre, which is approximately 55 percent of the original planned density of 500 per acre. The
planted bare root species that have better survivability are tulip poplar, black oak, red maple, red bud, and
sweet gum. Red maple, persimmon, sweet gum, and loblolly pines are sprouting voluntarily. Compared
to the May 2012 monitoring event, the average herbaceous ground cover has remained approximately the
same.
Based on the monitoring, the upland area of Zone 2, represented by Plots 2, 3, 5, and 6, appear to have
decreasing survivability for planted trees than the areas closest to Reach A, represented by Plots 1 and 4.
The monitoring reports are provided in Attachments 1 to 3.
ACTIONS PERFORMED
Repair of rill erosion along the northern portion of Step Pool #1 was repaired in May 2012,
�� i

Ward Transformer Superfund Site Reach A Monitoring October 23, 2012
Mr. Hilary Thornton and Mr. Danny Smith 3 053-3184D
ANTICIPATED ACTIONS
Re -planting has been scheduled for November 2012, targeting the upland of Zone 2 where tree
survivability is low using the following previously planted species that had the better survivability and
adding black locust and loblolly pine:
Common Name
Scientific Name
Red maple
Acer rubrum
Red bud
Cercis canadensis
Sweet gum
Liquidambar styraciflue
Tulip poplar
Liriodendron tutipifera
Black oak
Quercus velutina
Black locust
Robinia pseudoacacia
Loblolly pine
Pinus taeda
Black locust has nitrogen fixation characteristics and loblolly pine has been observed as a strong
volunteer at the Site. Depending on available nursery stock, species substitutions may be required. Re-
planting will be conducted in accordance with the specifications provided in Drawing SR-104 from the
Reach A Reconstruction Plan approved by NCDENR on March 22, 2011.
Should you have any questions regarding the revised planting plan or the monitoring results, please
contact the undersigned at [phone] or the Trust's Project Coordinator, Mr. William G. Weir of
CONSOL Energy Inc., at [phone].
GOLDER ASSOCIATES NC, INC.
Geraldine S. Monroy
Associate
cc: Mr. William G. Weir, CONSOL Energy Inc. (by email)
Mr. Henry Lyon, Progress Energy Carolinas, Inc. (by email)
Mr. Daniel M. Darragh, Cohen & Grigsby, PC (by email)
Mr. Michael Brom, PCS Administration (USA), Inc. (by email)
Mr. Nile Testerman, NCDENR (by email)
Attachments:
Attachment 1: May 2012 Reach A Monitoring Report
Attachment 2: July 2012 Reach A Monitoring Report
Attachment 3: September 2012 Reach A Monitoring Report
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LEGEND REFERENCES MT
1.) AS -BUILT INFORMATION FROM DRAWING TMED -POST REMOVAL ACTION CONIXTIONS (2 OF
2r.PREPARED OYFLEMR4NGENGINEERING- INC. DATED 8iIlrX"l.
MVLCR PEVI DAIS I ms I PEWSM 0E9CIW'V=
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TURF REINFORCED MJLTTW#G WARD TRANSFORMER SUPERFUND SITE
HYDROSEEDING RALEIGH, NORTH CAROLINA
CUSTOM BLEW SEEDING TIRF
REACH A
M VISUAL AND VEGETATION
StREAMSCOIR MATTING
MONITORING LOCATIONS
■ VEGETATION moNr70Rb4G PLOT LOCATION Pflo'cCT N. 053-3t643 FILE H.
DESIGN SCALE AS ;;Q=*NREV.
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CITY: PERMIT NUMBER q�
Permit Information that needs to be Incorporated into Future Permit Revisions
DATE COMMENTS

Temporary Erosion and
Sedimentation Control Plan —
Phase 2 Removal Action
Ward Transformer Superfund Site
Raleigh, North Carolina
Prepared for:
DeNovo Constructors, Inc.
Prepared by:
ENVIRON Engineers of North Carolina
Date:
December 2012
Project Number:
21-31284 B
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Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Contents
1 Introduction
1.1 Site Location and Definition
1 2 Overview of Removal Action
2 Site Setting
2.1 Topography and Surface Water Hydrology
2.2 Soils
2.3 Land Use
3 Erosion and Sediment Control Practices
3.1 Temporary Gravel Construction Entrance/Exit — Practice 6.06.1
32 Temporary Sediment Traps — Practice 6.60.1
3.3 Temporary Diversions — Practice 620.1
3.4 Check Dams — Practice 6.83.1
3.5 Outlet Stabilization — Practice 6.41.1
3.6 Rip -Rap and RECP Channels — Practice 6.31 1 and 6.17 1
3.7 Sediment Fence (Silt Fence) — Practice 6.62.1
3.8 Land Grading -- Practice 6.02 1
3.9 Surface Stabilization and Roughening — Practice 6.03.1
3.10 Porous Baffles — Practice 6.65
3.11 Waste Soil Stockpiling
3.12 Dust Control
4 Construction Sequence
4.1 Erosion and Sediment Control Measures Sequence
5 Vegetative Plan
51 Seedbed Preparation
5.1.1 Fill Slopes 3:1 or Steeper (Temporary Seeding)
5.1.2 Gentle or Flat Slopes
5.2 Seeding Method (SM)
5.2.1 Temporary Seeding on all slopes
5.3 Mulch (MU)
5.31 Fill Slopes 3:1 or Steeper (Temporary Seeding)
5.32 Gentle or Flat Slopes
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6 Personnel Training, Inspection, Recordkeeping, and Maintenance Plan 10
6.1 Personnel Training 10
6.2 Inspection and Maintenance Practices and Schedule 10
6.3 Record Keeping and Internal Reporting 11
7 References 12
Contents i ENVIRON

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
List of Figures
Figure 1:
Site Location Map
Figure 2:
Disturbance Areas
Figure 3:
Existing Topography and Surface Drainage Areas
Figure 4:
Soil and Riparian Buffer Map
Figure 5:
Erosion and Sedimentation Control Plan - Estes Property
Figure 6:
Erosion and Sediment Control Plan - RDU Reach 1
Figure 7:
Erosion and Sedimentation Control Plan - RDU Reach 2 and 3
Figure 8:
Erosion and Sediment Control Details (1 of 3)
Figure 9:
Erosion and Sediment Control Details (2 of 3)
Figure 10;
Erosion and Sediment Control Details (3 of 3)
List of Appendices
Appendix A:
NCDENR Inspection and Maintenance Report Form
Appendix B:
Erosion and Sedimentation Control Plan Preliminary Review Checklist
Appendix C:
Supporting Calculations
C.1: Time of Concentration
C.2: Rainfall Intensity
Appendix D:
Erosion Control Standard Specifications
Contents ii ENVIRON

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1
Erosion and Sedimentation Control Plan --
Phase 2 Removal Action
1 Introduction
This Temporary Erosion and Sediment Control Plan (E&SC Plan) has been developed by
ENVIRON Engineers of North Carolina, Professional Corporation (EENCPC) on behalf of
DeNovo Constructors, Inc. (DeNovo) for use during the Phase 2 Removal Action at the Ward
Transformer Superfund Site (the "Site"). The Phase 2 Removal Action will be conducted in
accordance with the United States Environmental Protection Agency (USEPA)-approved
Removal Action Plan (RAP) dated April 2006 with the specific scope for Phase 2 in the RAP,
Addendum No. 2, Revision 7 (the "Phase 2 RAP") dated October 12, 2012.
The Temporary E&SC Plan has been prepared in accordance with the requirements of the
North Carolina Department of Environment and Natural Resources (NCDENR) Erosion and
Sediment Control Design Manual. The permanent E&SC measures will be presented in the
Stream Reconstruction Plan that will be submitted at a later date.
1.1 Site Location and Definition
The Site is located in a predominantly industrial area of Wake County, North Carolina, on and
adjacent to the Raleigh International Airport (RDU). The Site location is illustrated on Figure 1.
The boundaries of the Site fall within the Estes Express Line (Estes) terminal located on
' property owned by Denovo Morrisville, LLC (Denovo Morrisville), property owned by Raleigh -
Durham Airport Authority (RDU) located south of the Estes property, North Carolina Department
of Transportation right of way along portions of 1-540 adjacent to the RDU property and portions
of Lumley Road, which cuts through RDU Property, and property owned by Ward Ventures LLC
between Lumley Road and 1-540.
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The Phase 2 RAP for the Ward Transformer Superfund Site provides the estimated extent of
polychlorinated biphenyl (PCB) -impacted areas based on the results of sampling, to date.
Additional sampling to be conducted during the Removal Action may extend and/or identify
further PCB -impacted areas. Consequently, the term Site as used in this E&SC Plan
incorporates those areas now defined in the RAP, those areas that may be defined during the
Removal Action, and associated disturbance areas including construction laydown areas and
new access roads. The total area of disturbance is 12.5 acres The Site boundaries based on
currently available information are shown on Figure 2.
1.2 Overview of Removal Action
The Phase 2 Removal Action of the Ward Transformer Superfund Site will include excavation
and off -site disposal of soil, sediment, and debris (collectively the "soil") with PCB
concentrations above 1.0 milligrams per kilograms (mg/kg). Because the potential for PCB
migration is via sediment transport in surface water, the removal action at the Estes property,
RDU, and Ward properties will be from upstream areas to downstream areas. The removal
action at the Estes property will generally be completed prior to initiating work at the other two
properties, and rights -of -way.
Given the terrain on the RDU property, small tracked equipment and mini -excavators are
expected to be used to excavate the soil and remove other materials from portions of this
property, as appropriate. Excavated material from the shallow excavations around the Estes
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Introduction 1 ENVIRON

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
property will be direct loaded for off -site disposal. Excavated material from all other excavation
areas will be temporarily staged on site prior to loading for off -site disposal. The stockpile areas
will be located in the laydown areas on the RDU property south of Estes and south of Lumley '
Road (later referred to in this document as RDU Reach 1 and RDU Reach 2). Loading and
transportation of excavated soil for off -site disposal will be accomplished in a manner that
minimizes the potential for release of the soil during the loading and transportation activities. For
dust control, water may be sprayed on the soil and/or other approved dust control measures.
E&SC controls as described in Section 3 will be implemented prior to beginning disturbance and
excavation activities in a removal area. The excavated area will be backfilled with clean fill and
returned to pre -removal grade and surface; re -vegetation will be accomplished in accordance
with the Vegetation Plan in Section 5. Portions of the streams located within the various
reaches within the Neuse River Riparian Buffer will be reconstructed in accordance with the
approved Stream Reconstruction Plan.
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Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
2 Site Setting
2.1 Topography and Surface Water Hydrology
The Estes property is generally flat with a very gradual slope from northeast to southwest. A
storm water pipe directs water from the Mt Herman Road ditch under the Estes property. The
RDU removal areas are located within and adjacent to an intermittent creek which slopes
gradually from northeast to the southwest flowing through culverts under Lumley Road at two
locations and then joining Reach A before flowing through a culvert under Interstate 1-540 into
Reach B (an unnamed tributary to Little Brier Creek), Figure 3 shows the Site topography.
The Removal Action will not change the total run-off from the site. Excavations made during the
Removal Action will be backfilled to approximately the same grades and surface conditions as
before excavation.
' 2.2 Soils
Based on information from the City of Raleigh and Wake County MAPS website, soils on the
Estes property are identified as Creedmore sandy loam in the B and C slope classes; the
surface of the Estes property is general compacted gravel fill with low permeability. The soils in
RDU Reach 1 are primarily Creedmore sandy loam with B (2%-6%) and E (10%-20%) slopes.
The soils in Reach 2 and 3 are primarily Chewacla fine sandy loam and silt loam soils.
Chewacla soils are found in lowland floodplain areas and have slopes of 0%-2%. Figure 4
shows soils present at the Site.
2.3 Land Use
The Estes property is zoned as TD (thoroughfare district) and the RDU property is zoned for
airport use. The TD zoning district permits land use for retail, office, and industrial uses.
Properties adjacent to the Phase 2 Removal Action area include the Phase 1 Removal Action
area to the north, private airport parking to the east, the RDU airfield and undeveloped
woodland to the south, and 1-540 to the west.
Based on information from the City of Raleigh and Wake County MAPS website, the majority of
the intermittent creek running through the Site is associated with the Neuse River Basin. These
portions of the intermittent creek are subject to the Neuse River Basin Buffer Rules. Figure 4
shows the location of the Neuse River Buffer zone.
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Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
3 Erosion and Sediment Control Practices
Erosion and sediment control devices have been designed and will be implemented during
construction in accordance with the E&SC Manual. The implementation of the measures will
minimize the potential for soil erosion and sedimentation during and after project
implementation. The erosion and sediment control measures that will be implemented during
project construction are presented in the drawings provided in Figures 5, 6, and 7. The
proposed erosion control measures are outlined in the following sections.
3.1 Temporary Gravel Construction Entrance/Exit — Practice 6.06.1
Temporary gravel construction entrances will be installed near the southeast corner of the Estes
property, and at the east end of the RDU Reach 2 laydown area. The stabilized entrance will
consist of a ramp of crushed stone extending a minimum distance of 50 feet installed at the
point of ingress and egress from the construction area. The purpose of the device is to
minimize the potential of tracking sediment off -site. Temporary gravel entrances/exits are
shown on Figures 5, 6, and 7, details are provided on Figure 8, and the standard specification is
provided in Appendix D-1.
3.2 Temporary Sediment Traps — Practice 6.60.1
There will be five temporary sediment traps installed during the Phase 2 Removal Action; two
for RDU Reach 1 and 2, and one for Reach 3. Once excavation is completed upstream of a
sediment trap, the trap will be cleaned to remove collected sediments and the check dam will be
used to retain clean water. The retained water will be diverted or pumped around downstream
removal areas. In RDU Reach 1, there will be a sediment trap constructed south of where the
access road crosses the drainage channel and then another just upstream for the Lumley Road
culvert which will drain approximately 3.1 and 1.2 acres, respectively. In RDU Reach 2, there
will be sediment traps at the upstream and downstream ends of the reach which will collect
sediment from approximately 0.2 and 0.9 acres of disturbed land respectively. Finally, in Ward
Reach 3, there will be a sediment trap located at the downstream end of the reach just
upstream of the 1-540 culvert, which will collect sediment from approximately 1.0 acres of
disturbed land. Sediment traps are shown on Figures 6 and 7, details are provided on Figure 9,
the standard specification is provided in Appendix D-2, and the design calculations are shown in
Appendix C.
3.3 Temporary Diversions — Practice 6.20.1
Temporary diversions will be used during the excavation in RDU Reach 1, 2, and 3 to control
run-on from entering the disturbed areas. Diversion ditches are shown on Figures 5, 6 and 7,
details are provided on Figure 8, and the standard specification is provided in Appendix D-3.
3.4 Check Dams — Practice 6.83.1
Check dams will be used for two purposes during the Phase 2 excavation. Check dams will be
used to slow down water in temporary diversions and water flowing through the main channel.
Additionally, in locations where large areas of undisturbed land drain to the removal area, larger
diversion berms will be installed to manage run-on. The diversion berms will be constructed to
retain run-on from smaller storms long enough to allow for the water to be pumped around the
excavation area. In advance of forecasted larger storms, DeNovo will temporarily cease
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Erosion and Sediment Conrol Practices 4 ENVIRON
1

Erosion and Sedimentation Control Plan -
Phase 2 Removal Action
' additional soil removal activities and backfill all open excavations within the streams. In these
cases, the water will be allowed to overtop the diversion berm. Certain check dams and
diversion berms are shown on Figures 5, 6, and 7, details are provided on Figure 10, and the
standard specification is provided in Appendix D-4.
I3.5 Outlet Stabilization — Practice 6.41.1
Outlet stabilization, consisting of a rip -rap apron, will be installed at the discharge of diversion
ditches and piping to prevent scour. Outlet Stabilization structures are shown on Figures 6 and
7, details are provided on Figure 9, and the standard specification is provided in
Appendix D-5.
3.6 Rip -Rap and RECP Channels — Practice 6.31.1 and 6.17.1
A combination of rip -rap and erosion control mats (RECP) may be installed to protect the
temporary diversion berm drainage channels after completion of excavation and backfill
activities in RDU Reach 1, 2 and 3. Calculations provided in Appendix C indicate that the shear
stress along the channel perimeter ranges from 0,48 -1.02 pounds/square feet (lb./SF). It is
1 assumed that a constant channel bed slope of 1% will be maintained for all channels. Where
steeper slopes are necessary to accommodate field constraints, additional velocity control
measures like check dams will be installed. RECP channel details are provided on Figure 10,
and the standard specification is provided in Appendix D-6.
A combination of rip -rap and RECP may be installed to protect the drainage channel after
' completion of excavation and backfill activities in RDU Reach 1, ,2 and 3. Final channel
restoration will be based on the Stream Reconstruction Plan. Channels will be reconstructed to
the existing cross-section; where channel side slopes are steeper than 3:1, the channel will be
reconstructed with 3:1 slopes.
3.7 Sediment Fence (Silt Fence) — Practice 6.62.1
Silt fences will be installed to reduce runoff velocity and affect deposition of transported
sediment load on the Estes property and the construction laydown areas. The purpose of silt
' fences is to intercept and detain sediment contained within runoff from on -site disturbed areas.
Sediment fencing is shown on Figures 5, 6, and 7, details are provided on Figure 8, and the
standard specification is provided in Appendix D-7.
' 3.8 Land Grading — Practice 6.02.1
Areas excavated during the Removal Action will be backfilled using clean fill from an off -site
borrow source or "clean" fill from an on -site source and re -graded to a slope matching the
original grade. Where the drainage channel slopes are steeper than 3:1, the slope will be
graded back to a desired 11 slope or to the extent practicable based on field conditions. Soil
on the slope of the Lumley Road embankment will not be removed inside a 2 horizontal to 1
vertical line extending downward from the top shoulder of the embankment in accordance with
the access agreement with the North Carolina Department of Transportation (NC DOT).
' Excavation areas to be filled are shown on Figures 5, 6, and 7, and the standard specification is
provided in Appendix D-8.
IErosion and Sediment Conrol Practices 5 ENVIRON

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
1
3.9 Surface Stabilization and Roughening — Practice 6.03.1
Surface roughening will be implemented to facilitate the surface stabilization activities which will
be accomplished with vegetation and mulch as specified in the Vegetative Plan, Section 5. The
standard specification is provided in Appendix D-9.
3.10 Porous Baffles —Practice 6.65
Porous baffles will be used to facilitate sedimentation in temporary sediment traps. The
standard specification is provided in Appendix D-10 and details are provided on Figure 9.
3.11 Waste Soil Stockpiling
Material excavated during the removal action within the Reaches will be stockpiled prior to off -
site disposal. These stockpiles will be placed in lined waste containment areas as specified in
DeNovo's Operation Plan to be approved by the USEPA. The approximate location of the
waste soil stockpiles are shown on Figures 5, 6, and 7,
3.12 Dust Control
Dust control will be accomplished through the use of vegetative cover, mulch, watering, or
barriers, as described in the Vegetative Plan. Construction operations will be scheduled to
minimize the amount of area disturbed at one time. Water will be applied by sprinkler or water
truck as necessary during grading operations to minimize sediment transport and maintain
acceptable air quality conditions.
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Erosion and Sediment Conrol Practices
ENVIRON I

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
4 Construction Sequence
4.1 Erosion and Sediment Control Measures Sequence
Removal actions will be conducted from upstream to downstream starting at the Estes property
and ending at the 1-540 culvert in Ward Reach 3. In each of the reaches, the Removal Action
will be conducted in the following general sequence:
• Hold preconstruction conference at least one week prior to starting construction to discuss
erosion and sediment controls. Meet as necessary throughout the duration of the project to
discuss continuing erosion and sediment controls.
• Install temporary gravel construction entrance/exit where site traffic is expected to enter and
exit the site on a daily basis.
• Flag the excavation areas as work progresses.
• Construct the sediment trap at the downstream end of excavation area or install the
sediment fence for the Estes property removal area.
• Construct temporary diversions around excavation area and outlet protection at the
discharge, if required.
• Install check dam(s), if required.
• Install laydown area silt fence and construct laydown area.
• Excavate soil in specified areas, backfill with clean soil, and stabilize backfilled areas with
mulch and temporary seed as specified in the vegetation plan or filter fabric and rip -rap as
specified in the plan. In general, excavation will progress from upstream to downstream. As
a goal, excavated areas will be backfilled the same day so that excavations are not left open
overnight and check dams will be routinely installed downstream of excavated and restored
areas. To the degree practicable, excavation and backfill will not be performed during storm
events.
• Once the Site is stabilized with vegetation, remove all temporary erosion and sediment
control measures.
Construction Sequence 7 ENVIRON

Erosion and Sedimentation Control Plan -
Phase 2 Removal Action
5 Vegetative Plan
As individual excavation areas are completed, grass seed will be applied as quickly as is
practicable. The specific type of grass seed to be used will depend on the time of year that the
excavation area is backfilled. Temporary grasses will be used to quickly establish a grass cover
on disturbed areas except for the Reach B channel and Estes properties. The total area to be
temporarily stabilized with vegetation is approximately 12 acres. Permanent grasses will be
specified in the Stream Reconstruction Plan. The following sections describe the general
approach for seedbed preparation, seeding and mulching methods and maintenance for the
Phase 2 Removal Action. Once DeNovo's work is completed, which includes establishing
permanent vegetation in accordance with the Stream Reconstruction Plan, maintenance will be
the responsibility of DeNovo for a year and then the individual property owners thereafter.
5.1 Seedbed Preparation
5.1.1 Fill Slopes 3:1 or Steeper (Temporary Seeding)
• Leave a loose, uncompacted surface. Remove large clods, rocks, and debris, which might
hold netting above the surface.
. Spread lime and fertilizer evenly at rates recommended by soil tests.
• Incorporate amendments by roughening or grooving soil surface on the contour.
5.1.2 Gentle or Flat Slopes
• Leave a loose, uncompacted surface. Remove large clods, rocks, and debris that might
hold netting above the surface.
• Spread lime and fertilizer evenly at rates recommended by soil tests.
• Break up large clods and rake into a loose, uniform seedbed.
• Incorporate amendments by roughening or grooving soil surface on the contour.
5.2 Seeding Method (SM)
5.2.1 Temporary Seeding on all slopes
• Broadcast seed at the recommended rate with a cyclone seeder, drop spreader, or
cultipacker seeder.
Late Winter/Early Spring (Jan 1 to May 1)
-- Rye (Grain): 120 Ibs.lacre
-- Kobe lespedeza: 50 Ibs.lacre
— Summer (May 1 — Aug 15)
-- German Millet: 40 Ibs.lacre
-- Sudangrass at 50 Ibs.lacre can be substituted
1
1
F'
L
F
L_
7
L
Vegetative Plan 8 ENVIRON I

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
— Fall (Aug 15 — Dec 30)
-- Rye (Grain): 120 Ibs.lacre
• Rake seed into the soil and lightly pack to establish good contact.
5.3 Mulch (MU)
5.3.1 Fill Slopes 3:1 or Steeper (Temporary Seeding)
• In mid -summer, late fall or winter, apply 100 Ib.11,000 square feet (ft) grain straw. In spring
or early fall use 45 Ib.11,000 ft2 wood fibers in a hydroseeder slurry.
• Cover with jute or excelsior netting and staple to the slope per the manufacturer's
specification.
5.3.2 Gentle or Flat Slopes
• Apply 4,000 lb./acre grain straw
• Tack immediately with 0.1-gallon per square yard (gallyd2) asphalt (11 gaI11,000 ft).
Vegetative Plan 9 ENVIRQN

Erosion and Sedimentation Control Plan --
Phase 2 Removal Action
6 Personnel Training, Inspection, Recordkeeping, and
Maintenance Plan
The following section specifies the requirements for maintaining and inspecting erosion controls
during the Removal Action, DeNovo's Site Manager, Dan Felton, will be responsible for
implementing the Maintenance Plan.
6.1 Personnel Training
During the Removal Action, personnel will be given responsibility for inspections, maintenance
and repair activities, and the corresponding documentation. Personnel selected for inspection
and maintenance responsibilities will have been or will be trained in the inspection and
maintenance practices necessary for keeping the erosion and sediment controls in good
working order. The training program will include:
• Briefings for field personnel regarding the scope and importance of erosion and
sedimentation control; and
• Training for the personnel authorized to perform the inspections and administrative duties of
the erosion and sediment control program.
The employee briefings will address the following areas:
• Sedimentation and erosion prevention - a review of the purposes and goal of the Storm
water Pollution Prevention Plan (SPPP), potential sources of sediment and erosion
measures employed, and the role of the field personnel in sediment and erosion prevention;
. Pollution control laws and regulations pertaining to sediment release; and
. The importance of sedimentation and erosion prevention.
6.2 Inspection and Maintenance Practices and Schedule
The following inspection and maintenance practices will be used to maintain erosion and
sediment controls during construction activities.
• Erosion and control measures, as well as storm water discharge points, will be inspected a
minimum of twice a week because the Site discharges into a 303(d) impaired watershed.
• Control measures, as well as storm water discharge points, will also be inspected within
24 hours after any precipitation of 0.5 inches or greater in any 24-hour period since the last
inspection as measured at the RDU weather station.
. Areas that have been permanently stabilized will be inspected at least twice weekly.
• Control measures will be maintained in good working order; repairs will be initiated within
24 hours of being reported.
• Sediment in sedimentation traps will be removed when it reaches one-half of the design
depth. Sedimentation control structures will be inspected for erosion, piping and risk of
displacement after each significant rainstorm (0.5 inches or greater), and will be repaired
immediately.
Personal Traning, Inspection, Recordkeeping, 10 ENVIRON
and Maintenance Plan
1
I
1

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
• Breaches in diversion and containment dikes will be promptly repaired.
• Silt fence will be inspected for:
- Depth of sediment (should be less than 6 inches at the fence),
- Fabric damage or tears,
- Fabric is secured to fence post, and
- Fence posts are firmly grounded.
• Temporary and permanent vegetative cover will be inspected twice weekly for bare spots,
washouts, and healthy growth. Repairs will be made, as necessary.
6.3 Record Keeping and Internal Reporting
Recordkeeping and reporting for maintenance activities are a part of the E&SC Plan. A log will
be kept of inspection and maintenance activities and to evaluate the effectiveness of the E&SC
program, equipment, and operation.
A maintenance inspection report will be made after each inspection. Inspections should be
documented on the NCDENR Inspection and Maintenance Report Form, which is included in
Attachment A. This form documents rainfall events, structural control inspections, and other
erosion control inspections. The following techniques may also be used to generate and
document the information required by the NCDENR Storm Water Inspection Form:
. Field notebooks and inspection forms;
• Timed and dated photographs, or video tapes; and
. Drawings, sketches and/or maps.
The Respondents will be provided copies of the inspection reports. These reports will be
provided within one calendar week following the week of each inspection. All other required
forms and reports will be forwarded with the weekly reports.
Original records of inspections and maintenance activities will be retained by DeNovo
throughout the Removal Action, and copies of these records will be available to EPA, if
requested. At the completion of the Removal Action, original records will be transferred to the
Respondents, with copies retained by the DeNovo. A summary of the E&SC activities will be
included in the Construction Completion Report to be submitted to the USEPA under the terms
of the Settlement Agreement.
Personal Traning, Inspection, Recordkeeping, 11 ENVIRON
and Maintenance Plan

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
7 References
Golder Associates, Inc., 2005. Example Erosion and Sedimentation Control Plan For The Ward
Transformer Superfund Site, Raleigh, North Carolina.
Golder Associates, Inc., 2012. Addendum No. 2 — Ward Transformer Removal Action Plan,
Revision 7 Phase 2 — Estes Property and RDU Property. October 12, 2012.
North Carolina Department of Environment and Water Resources, North Carolina Erosion and
Sedimentation Control Planning and Design Manual, 2006.
References 12 ENVIRON

I
Erosion and Sedimentation Control Plan -
Phase 2 Removal Action
Figures
ENVIRON

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112
0
200n 0 2000 4000 6000 FEET
LEGEND
APPROXIMATE
PROPERTY BOUNDARY
' SOURCE Google Eart dated June 17, 2008.
t ENVIRON
0$4AI T t 11 BY C N DATE 11120/12
SITE LOCATION MAP
WARD TRANSFORMER SUPERFUND SITE
RALEIGH, NORTH CAROLINA
FIGURE
1
>�T 312f!nH

/ loop /
"
1 - -% f
!
.01
TEMPORARY TRAILER/
EMPLOYEE PARKING
ADDITIONAL TRAILER
PARKING E57ES
/ PROPERTY
■
7
f
LAYDO" I ACCE
1 ' ROAD SOUTH
I � -
I �
l
TEMPORARY TRAILER/
EMPLOYEE PARKING
1
_ r
0
LEGEND
-- APPROXIMATE PROPERTY BOUNDARY
— SURFACE WATER & DRAINAGE
— PIPE LOCATION
PHASE I REMOVAL ACTION
® EXISTING ACCESS ROAD AND PAD
PROPOSED PIPE ALIGNMENT BELOW
GROUND SURFACE IN CLEAN SOIL
_ ESTIMATED EXCAVATION AREA
® 25-FT DISTURBANCE AREA BUFFER
LAYDOWN AREAS
oaoaaa AREA FOR ADDITIONAL INVESTIGATION
oaa000
NOTE,
1 Data as of August 31 2011
2 Total area distur ed is appro i atel 12 5 acres.
REFERENCES:
1 Wa a Count GIS, 1 2002
2 Weston Solutions, Inc, 2005
3 fie ing Engineering, Inc 2006, 2007
4 Projection: Nort Carolina State Plane one 3200.
Datu : NAD 83
APPROX SCALE ,ft i
0 250

I
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'do
IJ
WT 70W
/ WARD 't
-- i
rvr low — �.� �•
- I
WARD
/WAR D I
WARD
.01
VENTURES.04
U
/
RDU
100 RDU
EST
1 \ RDU
UA5
3 ACRES , Gr._
,� - 51 ACRES C_•.
,j r
' RDU �
ACRES
(CO201 R
DAo
DATI
I ACRES
DA14
0 7 ACRES
IC 0451
, 46 ACRES
kk �Dh'
• i Or1C' �B \ , 1206ACRES
09 ACRES
�c a 20
iC 0451 C �
' 45 ACRES \
RDU
252 ACRES /
C 0 15) \/
/ RDU
S /
l � /
1 /
1 f
1 ,
V
O
2
%-- 000
6
s
LEGEND
--- APPROXIMATE PROPERTY BOUNDARY
— — SURFACE WATER & DRAINAGE
PIPE LOCATION
PHASE I REMOVAL ACTION
NOTE
Data as of August 31 2011
REFERENCES
1 Wa a Count GIS, 1 2002
2 Weston Solutions. Inc. 2005
3. Fle ing Engineering. Inc_ 2006. 2007
4 Projection Nort Carolina State Plane one 3200.
Datu NAD 83
APPROX SCALE(R)
a 350

1
I
1

CrE _
CrC2
MfC2 f
CrB2
MfB2 i
P
CrC2
CrC2
w CrC _ _---
MfE
MfB
CrC2
CrE
CrB2
CrE
L
CrB
CrE
Cm ,
I
I
I
I
I
CrE `
CrB2
-� CrC2
CrC
` CrC
CrC
CrE
CrC
CrB
CrC
CrB2
lei
Q
LEGEND
Z
Q
APPROXIMATE SITE BOUNDARY
_ NEUSE RIVER BASIN RIPARIAN BUFFER
W
CrE CREEDMORE SANDY LOAM
\1
(10-20 PERCENT SLOPES)
CrC CREEDMORE SANDY LOAM
`•
(6-10 PERCENT SLOPES)
?
CrC2 CREEDMORE SANDY LOAM
(6-10 PERCENT SLOPES. ERODED)
CrB2 CREEDMORE SANDY LOAM
(2-6 PERCENT SLOPES, ERODED)
\
Cm CHEWACLA SOILS
NOTE:
The location of the riparian buffer is based an the stream segment shorn
CrB
on the 2010 USGS Southeast Durham 7.5' Quadrangle Map.
Soils layout adapted from City of Raleigh. Wake County, #MAPS
http:llmaps.ralei hnc.govrMAPSfrnda.html
CrC
CrC2 -
CrB2 MfB2 - -
- Me
APPROX. SCALE (R)
0 25C

1

1
f
ADDITIONAL
TRAILER PAR ING ;
(SEE NOTE 1)
r-------------------
CLEAN SOIL STORAGE
rFR r�Fq rMENTp
�Nr
APPROY `_ALE (ft.�
n 100
1
-- l
I-
TEMPORARY TRAILER/
EMPLOYEE PAR 1NG
(SEE NOTE 1) j f
f +.
man
f ,
+ r
!
t
r
r
�t
f
r
r
r
f
r
t
r
f t
f
r
r
+
! r f
r
1 i
1 ;
1 � �
1 + r
1 l
r
f
+
+
r
!
I +
I
I'
r
9 i-
_ FIELD
OFFICE
EQUIPMENT
STORAGE +
t ,
'OIL STORAGE
r ,
t
� t
r`• tyO�E. til
EX1STtNG ACGESS ROAD(SEE
1
LEGEND
---- APPROXIMATE PROPERTY BOUNDARY
— — — SURFACE WATER & DRAINAGE
� PROJECTED PIPE LOCATION
PHASE I REMOVAL ACTION
® EXISTING ACCESS ROAD AND PAD
PROPOSED PIPE ALIGNMENT BELOW
GROUND SURFACE IN CLEAN SOIL
_ ESTIMATED EXCAVATION AREA
L� 25-FT DISTURBANCE AREA BUFFER
LAYDOWN AREAS
9R0000 AREA FOR ADDITIONAL INVESTIGATION
op0000
CONSTRUCTION ENTRANCE / EXIT
LINED WASTE CONTAINMENT AREA
----- SILT FENCE
``tit` 4a1. TEMPORARY GRAVEL RAMP
NOTES,
1, Existing gravel surfaces are stabilized and will not be disturbed
during construction operations. Therefore. specific Sl are not
proposed for these areas at this time. In the event that these
stabilized gravel surfaces or adjoining areas are disturbed then
appropriate l will be designed and installed as necessary
2- Only excavate areas that can be restored in the same day.
3 Water check dams will be installed upstream and downstream of
the excavation area daily to slow water flow and prevent
sedimentation; also used for pumping water around in the event of
an emergency.
4. Once areas upstream of sediment traps are remediated. pumps will
be used to pump water around remediation areas during light rain
stomas (<I- nch); during larger storms water will be allowed to exit
and downstream excavation areas will be protected against erosion.
REFERENCES
1- Wake County GIS, 1999,2002
2. Weston Solutions, Inc., 2005
3. Fleming Engineering, Inc. 2006, 2007
4- Projection, North Carolina State Plane Zone 3200 Datum NAD 83

1
11

t r- v ,� � rye � -• � J '. .., � \ _• ` _ `- I
TEMPORARY TRAILER/ I
_ ~ ' EMPLOYEE PAR ING
(SEE NOTE 1)
ADDITIONAL _ z
/ - TRAILER PAR . ING
(SEE NOTE 1)
i~
_ r
r ^ ESTES t
PROPERTY 7
1 � ,
1 r
1 r
1 ! r
i r
� 1 ,
----- +
r
r
GH2
1
1 +
J '
FIELD
WASTE SOIL �k ',OFFICE
STORAGE r '
— ; CLEAN SOIL +
SrFw�TFR� STORAGE OTE1)
,tgi1NG ACCESS ftOAO iSEE �
E
_ NT EQUIPMENT STORAGE
■
TS3
�J
`VMS �
--Nowol ROgQ
� 1
APPROX. SCALE Ift
+ 150 �
LEGEND
--- APPROXIMATE PROPERTY BOUNDARY
— — SURFACE WATER & DRAINAGE
r+� PROJECTED PIPE LOCATION
PHASE I REMOVAL ACTION
® EXISTING ACCESS ROAD AND PAD
PROPOSED PIPE ALIGNMENT BELOW
GROUND SURFACE IN CLEAN SOIL
_ ESTIMATED EXCAVATION AREA
25-FT DISTURBANCE AREA BUFFER
LAYDOWN AREAS
nnnnna AREA FOR ADDITIONAL INVESTIGATION
nnnono
CONSTRUCTION ENTRANCE 1 EXIT
LINED WASTE CONTAINMENT AREA
f - TEMPORARY SEDIMENT TRAP
TEMPORARY DIVERSION BERM
— — — — TEMPORARY DIVERSION BERM
------- SILT FENCE
;;.` TEMPORARY GRAVEL RAMP
Q TEMPORARY OUTLET PROTECTION
NOTES:
1. Existing gravel surfaces are stabilized and will not be disturbed
during construction operations. Therefore, specific BMPs are not
proposed for these areas at this time. In the event that these
stabilized gravel surfaces or ad}oining areas are disturbed, then
appropriate BMPs will be designed and installed as necessary.
t 2. Only excavate areas that can be restored in the same day.
3. Water check dams will be installed upstream and downstream of
the excavation area daily to slow water flow and prevent
sedimentation: also used for pumping water around in the event of
an emergency
4. Once areas upstream of sediment traps are remediated, pumps will
be used to pump water around remediation areas during fight rain
storms (<1-inch), during larger storms water will be allowed to exit
and downstream excavation areas will be protected against erosion
REFERENCES'.
1. Wake County GIS. 1999, 2002
2. Weston Solutions, Inc., 2005
3 Fleming Engineering, Inc. 2006, 2007
4. Projection. North Carolina State Plane Zone 3200, Datum. NAD 83

1

/ Ala %Y
SAO
TS
,1
000,
r
I
-------- - - - - ---- - - - - --
1 ; CH8
RDU S% ` 1
REACH 3� ♦� ♦ \ ' ...
CH4 CLEAN SOIL
!moat
�
EQUIPMENT ` GH5 � \ ^ � STORAGE �.
,STORAGE
1 RDU— .
CH6
REACH 2
r
�� f / WASTE SOIL - /
/ STORAGE .�
I / -
1
f Ole �
/ � \
APPROX SCALE{fl}
0 150
LEGEND
--- APPROXIMATE PROPERTY BOUNDARY
— SURFACE WATER & DRAINAGE
PROJECTED PIPE LOCATION
PHASE I REMOVAL ACTION
® EXISTING ACCESS ROAD AND PAD
®PROPOSED PIPE ALIGNMENT BELOW
GROUND SURFACE IN CLEAN SOIL
_ ESTIMATED EXCAVATION AREA
EM 25-FT DISTURBANCE AREA BUFFER
LAYDOWN AREAS
AREA FOR ADDITIONAL INVESTIGATION
CONSTRUCTION ENTRANCE / EXIT
LINED WASTE CONTAINMENT AREA
l- TEMPORARY SEDIMENT TRAP
TEMPORARY DIVERSION BERM
— — — — TEMPORARY DIVERSION BERM
------- SILT FENCE
TEMPORARY OUTLET PROTECTION
NOTES.
1 Only excavate areas that can be restored in the same day.
2 Water check dams will be installed upstream and downstream of
the excavation area daily to slow water flow and prevent
sedimentation; also used for pumping water around in the event of
an emergency.
3. Once areas upstream of sediment traps are remediated, pumps will
be used to pump water around remediation areas during light rain
storms (<1-inch); during larger storms water will be allowed to exit
and downstream excavation areas will be protected against erosion
4. Clean soil and waste soil from RDU Reach 3 will be stockpiled in
the RDU Reach 1 laydown area.
REFERENCES
1 Wake County GIS, 1999. 2002
2 Weston Solutions, inc. 2005
3 Fleming Engineering, Inc 2006 2007
4 Projection North Carolina State Plane Zone 3200, Datum: NAD S1

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1. THE ENTRANCE/EXIT SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING
OR FLOW OF SEDIMENTS ONTO PUBLIC RIGHT-OF-WAY. THIS MAY REQUIRE PERIODIC TOP
DRESSING WITH 2-3 INCH STONE, AS CONDITIONS DEMAND, AND REPAIR AND/OR CLEANOUT
OF ANY STRUCTURES TO TRAP SEDIMENT. ALL MATERIALS SPILLED, DROPPED, WASHED OR
TRACKED FROM VEHICLES ONTO ROADWAYS OR INTO STORM DRAINS MUST BE REMOVED. UPON
COMPLETION OF CONSTRUCTION, STONE AND GEOTEXTILE WILL BE REMOVED.
CONSTRUCTION ENTRANCE / EXIT
N-Is
�LMAX.
4"
III III
�IL
Ill
W F o REG�QN
SEDIMENT FENCE
N TS
STEEL POSTS SHALL BE
2-0 OR 1.3 LBS/FT.
2' MIN.
COMPACTED SOIL
LINER z
FLOW
VARIES
3.1
2' MIN.
6' TYP.
NOTE:
1. TRENCH DEPTH VARIES FOR EACH DIVERSION, SEE APPENDIX D-3.
2. USE LINER WITH SHEAR STRESS RAIDING > 175 LB/SF. SECURE PER MANUFACTURER'S SPECIFICATIONS
TEMPORARY EARTHEN DIVERSION DIKE
NTS
24" MiN.
NOTES:
1. SILT CONTROL SHALL BE IN EFFECT PRIOR TO ANY GRADING OR CONSTRUCTION.
2. USE WIRE -REINFORCED SEDIMENT FENCE. FILTER FABRIC FOR FENCE SHALL BE A
NON-CALENDERED WOVEN FABRIC CONSTRUCTED WITH MONOFILAMENT YARNS. THE
WOVEN WIRE -REINFORCEMENT FENCE SHALL BE AT LEAST 32 INCHES HIGH AND BE
AT LEAST 10 GAUGE FOR THE TOP AND BOTTOM WIRES AND 12.5 GAUGE FOR THE
REST OF THE WIRE.
3. SPLICED JOINTS SHALL OVERLAP 18", WITH MATCHING POST.
4. DRIVE 4 (48") MIN. POSTS 24" INTO SOIL.
5. DIG DITCH 4" WIDE, 8" DEEP. LAY FABRIC 8" DEEP, THEN BACKFILL AND
COMPACT.
�I
3
DETAIL DRAWINGS OBTAINED FROM GOLDER ASSOCIATES ATLANTA GEORGIA
J

1

EXISTING
GROUND
SURFACE
2' TO 3.5' MIN,
NATURAL GROUND
VARIES 1 5
(SEE NOTE) M
1.5' MIN.
3` AAIfJ
W IIIAI ur nrr ri are- n
�N
NOTES:
1. WEIR LENGTH IS 8 FEET MINIMUM FOR TS1, AND
4 FEET FOR TS2-5.
2. EXTEND RIP RAP APRON A MINIMUM OF 10 FEET
PAST THE TOE OF SPILLWAY SLOPE.
TEMPORARY SEDIMENT TRAP
N TS
DETAIL DRAWINGS OBTAINED FROM GOLDER ASSOCIATES ATLAN7r GE�)RG�A
AX.
Iv VL./Jv. I - lr Vlr vvw v L IN
GEOTEXTILE FILTER FABRIC
OVERFILL 6" FOR
SETTLEMENT
EMERGENCY
BY—PASS
6" BELOW
SETTLED TOP
°L
NC
RIP
3. INSTALL POROUS BAFFLES AS SPECIFIED IN
APPENDIX D-10. SPACE BAFFLES AS FOLLOWS:
TRAP ID
A
B
C
TS 1
31 5
225
22.5
TS 2
21
15
15
TS 4. 5
17.5
125
12-5
TS 3
10.5
75
7.5
3D
10 OZ./SQ.YD. NONWOVEN
GEOTEXTILE FILTER FABRIC
NOTES:
1. INSTALL 10 OZ./SQ.YD. NONWOVEN
GEOTEXTILE FILTER FABRIC BETWEEN SOIL
FOUNDATION & RIP RAP.
2. LINE WITH NC DOT CLASS B RIP RAP.
3. MINIMUM APRON THICKENESS = 15".
OUTLET STABILIZATION STRUCTURE
N TS

1
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1

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix A
NCDENR Inspection and Maintenance Report Form
ENVIRON

SELF -INSPECTION REPORT LAND DISTURBING ACTIVITY EQU R D BY NCGS1 3 -54.
PROJECT NAME:
PROJECT NO.:
I I i I I I I I I I I
NAME OF INSPECTOR:
AFFILIATION*:
l I I ( I I (`Landowner, Financially Responsible Party or Agent)
ADDRESS OF INSPECTOR:
TELEPHONE NUMBER:
j
Signature:
Date:
(Landowner, Financially Responsible Party or Agent)
j
I
Phase of Approved Erosion and Sedimentation Control Plan:
Mark (x)
Installation of perimeter erosion and sediment control measures
Clearing and grubbing of existing round cover
Completion of any phase of grading of slopes or fills
Installation of storm drainage facilities
Completion of construction or development
Establishment of permanent ground cover sufficient to restrain erosion
INSPECTED:
EROSION AND SEDIMENTATION CONTROL MEASURES
NamelNumberl
Location of Measure
(List all measures
on Plan)
Measures Installed Since
Last Report
Measure
Operating
Properly
YeslNo
Significant
Deviation
from Plan?
(Yes/No)
Describe Corrective Actions Needed
Proposed
Dimensions
(feet)
Actual
Dimensions
feet
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_
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List actions taken to correct deviation or restore sediment damage on "Actions Taken Sheet" Page 1

Erosion and
Sediment Control Measures Inspected: (Continued)
Name/Number/
Location of Measure
(List all measures
on Plan)
Measures Installed Since
Last Re ort
Measure
operating
Properly
(Yes/No)
Significant
Deviation
from Plan?
(Yes/No)
Describe Corrective Actions Needed'
Proposed
Dimensions
(feet)
Actual
Dimensions
(feet)
I
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V
l
l
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I
4
l
I
!
Ground Cover on
Slopes (By Location)
Date Phase of
Grading
Complete
Date Ground
Cover
Provided
Is Ground Cover Sufficient to
Restrain Erosion?(Yes/No)
Describe Corrective Actions Needed
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Permanent Ground
Cover (By Location)
Date
construction
Complete
Date Ground
cover
Provided
Is Ground Cover Sufficient to
Restrain Erosion?(Yes/No)
Describe Corrective Actions Needed
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I
*List actions taken to correct deviation or restore sediment damage on "Actions Taken Sheet."
Page 2
� I♦ � i�l � Its � v � il© � � � i�i■I. � � � � �

m m m m m m ! m m M � m m M > m m m'�
",,4-m
,.Location. -of
:Deviation or _ `
Sediment oama a
Y:, %: :
"'+ Actions Taken to Correct Deviation or Restore Sedimentation Damage
Date Action
Taken
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Page 3

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
1 Appendix B
Erosion and Sedimentation Control Plan Preliminary Review Checklist
ENVIRON

NORTH CAROLINA DEPARTMENT OF ENVIRONMENT & NATURAL RESOURCES
LAND QUALITY SECTION
EROSION and SEDIMENTATION CONTROL PLAN PRELIMINARY REVIEW CHECKLIST
The following items shall be incorporated with respect to specific site conditions, in an erosion & sedimentation control plan:
LOCATION INFORMATION X Name and classification of receiving water course or name of
municipal operator (only where stormwater discharges are to
X Project location & labeled vicinity map (roads, streets, landmarks) occur)
North arrow and scale
X Identify River Basin.
X Provide a copy of site located on applicable USGS quadrangle and
NRCS Soils maps if it is in a River Basin with Riparian Buffer
requirements.
GENERAL SITE FEATURES (Plan elements)
X Property lines & ownership ID for adjoining properties
X Existing contours (topographic lines)
X Proposed contours
X Limits of disturbed area (provide acreage total, delineate limits,
and label). Be sure to include all access to measures, lots that will
be disturbed, and utilities that may extend offsite.
NA Planned and existing building locations and elevations
X Planned & existing road locations & elevations, including
temporary access roads
NA Lot and/or building numbers
X Hydrogeologic features: rock outcrops, seeps, springs, wetland
and their limits, streams, lakes, ponds, dams, etc. (include all
required local or state buffer zones and any DWQ Riparian Buffer
determinations)
NA Easements and drainageways, particularly required for offsite
affected areas. Include copies of any recorded easements and/or
agreements with adjoining property owners.
NA Profiles of streets, utilities, ditch lines, etc.
X Stockpiled topsoil or subsoil locations
NA If the same person conducts the land -disturbing activity & any
related borrow or waste activity, the related borrow or waste
activity shall constitute part of the land -disturbing activity unless
the borrow or waste activity is regulated under the Mining Act of
1971, or is a landfill regulated by the Division of Waste
Management. If the land -disturbing activity and any related
borrow or waste activity are not conducted by the same person,
they shall be considered separate land -disturbing activities and
must be permitted either through the Sedimentation Pollution
Control Act as a one -use borrow site or through the Mining Act.
X Location and details associated with any onsite stone crushing or
other processing of material excavated. If the affected area
associated with excavation, processing, stockpiles and transport
of such materials will comprise 1 or more acres, and materials will
be leaving the development tract, a mining permit will be required.
NA Required Army Corps 404 permit and Water Quality 401
certification (e.g. stream disturbances over 150 linear feet)
EROSION & SEDIMENT CONTROL MEASURES (on plan
X Legend (provide appropriate symbols for all measures and
reference them to the construction details)
X Location of temporary measures
X Location of permanent measures
X Construction drawings and details for
temporary and permanent measures. Show measures to scale on
plan and include proposed contours where necessary. Ensure
design storage requirements are maintained through all phases of
construction.
X Maintenance requirements for measures
X Contact person responsible for maintenance
SITE DRAINAGE FEATURES
X Existing and planned drainage patterns (include off -site areas that
drain through project and address temporary and .permanent
conveyance of stormwater over graded slopes)
X Method used to determine acreage of land being disturbed and
drainage areas to all proposed measures (e.g. delineation map)
NA Size, pipe material and location of culverts and sewers
X Soil information: type, special characteristics
X Soil information below culvert storm outlets
STORMWATER CALCULATIONS
X Pre -construction runoff calculations for each outlet from the site (at
peak discharge points). Be sure to provide all supporting data for
the computation methods used (rainfall data for required storm
events, time of concentration/storm duration, and runoff
coefficients).
X Design calculations for peak discharges of runoff (including the
construction phase & the final runoff coefficients for the site)
NA Design talcs for culverts and storm sewers (include HW, TW and
outlet velocities)
X Discharge and velocity calculations for open channel and ditch
flows (easement & rights -of -way)
_X_ Design talcs for cross sections and method of stabilization for
existing and planned channels (include temporary linings). Include
appropriate permissible velocity and/or shear stress data.
NA Design talcs and construction details for energy dissipaters below
culvert and storm sewer outlets (include stone/material specs &
apron dimensions). Avoid discharges on fill slopes.
X Design talcs and dimension of sediment basins (note current
surface area and dewatering standards as well as diversion of
runoff to the basins). Be sure that all surface drains, including
ditches and berms, will have positive drainage to the basins.
VEGETATIVE STABILIZATION
X Area & acreage to be stabilized with vegetation
X Method of soil preparation
X Seed type & rates (temporary & permanent)
X Fertilizer type and rates
X Mulch type and rates (include mulch anchoring methods to be
used)
NOTE: Plan should include provisions for groundcover on exposed slopes
within 21 calendar days following completion of any phase of
grading; permanent groundcover for all disturbed areas within 15
working days or 90 calendar days (whichever is shorter) following
completion of construction or development.
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
NA Completed, signed & notarized FR10 Form
NA Accurate application fee payable to NCDENR ($65.00 per acre
rounded up the next acre with no ceiling amount)
NA Certificate of assumed name, if the owner is a partnership
NA Name of Registered Agent (if applicable)
NA Copy of the most current Deed for the site. Please make sure the
deed(s) and ownership information are consistent between the
plan sheets, local records and this form.
NA Provide latitude & longitude (in decimal degrees) at the project
entrance.
NOTE: For the Express Permitting Option, inquire at the local Regional
Office for availability.
NARRATIVE AND CONSTRUCTION SEQUENCE
X Narrative describing the nature & purpose of the construction
activity
X Construction sequence related to erosion and sediment control
(including installation of critical measures prior to the initiation of
the land -disturbing activity & removal of measures after areas they
serve are permanently stabilized). Address all phases of
construction and necessary practices associated with temporary
stream bypasses and/or crossings.
NA Bid specifications related only to erosion control
rev. 1/7/2009

1
Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
0
1
1
Appendix C
Supporting Calculations
1
ENVIRON

r r rr r r r r r r r r �r rr rr �r r r r
DESIGN OF TEMPORARY DIVERSION CHANNELS
Ward Transformer Superfund Site
Raleigh, North Carolina
Peak Storm Intensitv (in/hri 10-Year = 4.78 2-Year = 3.74 Channel RouPhness Coefficient f n) = 0.033 Channel Freeboard ifti = 0.3
Runoff Estimation 3
Temporary Diversion Channel Design
Design of Channel Lining 4
Diversion
Contributing Drainage
10 - Year
2 -Year
1
2
Flow
flowdepth at 2
Channel ID
Aareas
Total Drainage
Runoff
Peak Runoff
Peak Runoff
Bottom
Side
Channel
Shear Stress*
Depth (ft)
Capacity
yr Storm
Area (ac.)
Coefficient
Width (ft)
Slopes
Bed Slope
(lb/sq.ft.)
{cfs)
(ft}
cfs
cfs
CH - 1
DA 4 + DA 1
13.02
0.35
21.83
17.08
2
1.5
3
0.01
23.92
1.03
0.64
CH - 2
DA 2 + DA 5
14.98
0.41
29.10
22.77
2
2
3
0.01
52.50
1.17
0.73
DA 1 + DA 2 + DA 3 + DA 4
CH - 3
33.77
0.38
61.24
47.92
2
IS
3
0.01
95.81
1.63
1.02
+ DA 5 + DA 6 + DA 11
CH -4
DA 7
12.06
0.20
11.53
9.02
2
1.5
3
0.01
23.92
0.76
0.48
CH - 5
DA 7 + DA 8
19.51
0.20
18.65
14.59
2
1.5
3
0.01
23.92
0.96
0.60
CH - 6
DA 7 + DA 8 + DA 9
44.71
0.17
36.72
28.73
2
2
3
0.01
52.50
1.30
0.81
0.5 x (CH 3 + CH 6 + DA10)
CH - 7
44.86
0.25
53.81
42.10
2
2.5
3
0.01
95.81
1.54
0.96
+DA13
0.5 x (CH 3 + CH 6 + DA10)
CH 8
44.90
0.25
53.84
42.13
2
2.5
3
0.01
95.81
1.54
0.96
+ DA 12
Notes:
1 Location and IDs of the Diversion Channels are presented in Figures 6 and 7
Z Delineation and hydrological properties of the of the Drainage Areas are presented in Figure 3
3
A constant time of concentration of 15 - minutes was used conservatively in the calculations. The time concentration for the smallest catchment (DA 7 for CH - 4) for only the sheet flow
component was estimated as 17-minutes using Kinematic Wave Theory (sheet flow length = 300ft, slope = 0.0067, n=0.033, i = 4.78, C = 0.20), using procedure laid out in Page 8.03.2 of the NC E&SC
Manual (Attachment C-1). Storm intenisty for Raleigh, NC was obtained from Page 8.03.10 of the NC E&SC Manual (Attachment C-2)
4
Shear Stress calculations indicate that a straw liner with net (at a minimum) will be sufficient for channel stability. A constant channel bed slope of 1% will be maintained for all channels. Where
steeper slopes are necessary to accommodate field constraints, additional velocity control measures like check dams will be instalfed.

I� IA � r a• r .� � s � � i I• � � �■s � ® �
DESIGN OF TEMPORARY SEDIMENT TRAPS
Ward Transformer Superfund Site
Raleigh, North Carolina
10-Year Peak Storm Intensitv (in/hr) = 4.78
Runoff Estimation
Sediment Trap Design3
Temporary
Contributing
Total
in. Req.
Su rtace
Sediment Trap
Drainage
2
Drainage
Peak
Top
Top
Surface
Surface
Area
Min. Requ.
Volume
ID1
Areas
Area
Runoff
Runoff
Length
Width
Depth
Area
Area
Design
Volume
Volume
Design
(ac.)
Coeff.
Rate (cfs)
(ft)
(ft)
(ft)
(sq. ft.)
(sq. ft.)
Check
(cu.ft)
(tuft)
Check
TS 1
DA 3
3.12
0.45
6.71
90
45
4.S
4,050
2,919
OK
13,487
11,232
OK
TS 2
DA 6
1.19
0.45
2.56
60
30
4.5
1,800
1,113
OK
5,184
4,284
OK
TS 3
DA 10a
0.23
0.45
0.49
30
15
4
450
215
OK
872
828
OK
TS 4
DA 10b
0.89
0.45
1.91
SO 1
25
4.5
1,250
833
OK
3,317
3,204
OK
S 5
DA 14
0.97
0.45
2.09
L 50
25
5
1,250
908
OK
3,500
3,492
OK
Notes:
1 Location and IDs of the Diversion Channels are presented in Figures 6 and 7
2 Delineation and hydrological properties of the of the Drainage Areas are presented in Figure 3
3 Side slopes of the Temporary Sediment Traps shall be 1V=2H

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix C-1
Time of Concentration
1
1
1
n
1
I
ENVIRON

0
Step 3. Determine the time of concentration, TC, for the drainage area
Shortcut to Time of Concentration, TC calculation:
As long as a watershed's area is less than 4.6S, A("CM') < 4.6. S %, where S
is the slope in percent, the total time of concentration can be taken to be 5
minutes for bare soil. This is helpful to know because it will save the time of
calculating time of concentration by other methods, including the Kincnia6c
Wave Theory (below) which requires an iterative solution.
The Kinematic Wave Theory defines time of concentration as the "travel time
of a wave to move from the hydraulically most distant point in the catchment
to the outlet (Bedient and Huber, 1992)". The formula for the time of
concentration for overland flow is:
5
L
1.49 * Suz I, * C 2/3
,1 (432001
IC - — -
where:
60
L = length of overland How plane (feet)
S = slope (ft/ft)
n = Manning's roughness
li = rainfall intensity
C = rational runoff coefficient
Because both time of concentration and rainfall intensity are unknown
variables in one equation, the solution must be found through iterations. The
use of a spreadsheet is recommended. An example is shown in Table 8.03a.
8.03.2 Rev. 6/07

1
Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
1
I
I
1
I
n
1
1
1
Appendix C-2
Rainfall Intensity
ENVIRON

t
1
1
0
Appetutives
;Raleigh.
North'Carolina) 35.8706N. 78.7864W
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
5.58
4.46
3:74
2.58
1.62
0.94
0.66
0.40
0.24
0.14
10
7.08
5.66
4.78
3.46
2.25
1.33
0.95
0.58
0.34
0.021
25
7.78
6.19
5.24
3.88
2.58
1.54
1.11
0.68
0.41
0.24
100
8.64
6.86
5.78
4.43
3.05
1.85
1.36
0.84
0.51
0.30
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.11
4.88
4.09
2.83
1.77
1.04
0.74
0.44
0.26
0.15
10
7.96
6.36
5.36
3.88
2.53
1.54
1.10
0.66
0.39
0.23
25
8.94
7.13
6.02
4.46
2.97
1.83
1.32
0.80
0.47
0.28
100
10.44
8.29
6.99
5.35
3.69
2.29
1.69
1.03
0.62
0.36
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
7.39
5.92
4.96
3.42
2.15
1.28
0.91
0.56
0.33
0.19
10
9.70
7.75
6.54
4.74
3.08
1.94
1.39
0.87
0.51
0.30
25
10.98
8.75
7.40
5.48
3.65
2.38
1.73
1.08
0.64
0.38
100
12.92
10.27
8.65
6.63
4.56
3.18
2.37
1.49
0.89
0.53
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.41
5.12
4.29
2.96
1.86
1.10
0.78
0.47
0.27
0.16
10
8.38
6.70
5.65
4.09
2.66
1.64
1.19
0.72
0.42
0.25
25
9.48
7.55
6.38
4.73
3.15
1.99
1.46
0.88
0.52
0.31
100
11.16
8.87
7.47
5.72
3.94
2.58
1.93
1.18
0.70
0.42
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
6.46
5.16
4.32
2.99
1.87
1.08
0.79
0.48
0.29
0.17
10
8.47
6.77
5.71
4.14
2.69
1.62
1.20
0.74
0.44
0.27
25
9.56
7.62
6.44
4.77
3.17
1.96
1.47
0.91
0.54
0.33
100
11.26
8.95
7.54
5.77
3.98
2.54
1.95
1.21
0.73
0.44
ARI*
5 min.
10 min.
15 min.
30 min.
60 min.
120 min.
3 hr.
6 hr.
12 hr.
24 hr.
(years)
2
7.20
5.75
4.82
3.33
2.09
1.29
0.94
0.58
0.34
0.20
10
9.41
7.52
6.35
4.60
2.99
1.93
1.43
0.89
0.53
0.31
25
10.66
8.49
7.18
5.31
3.54
2.33
1.75
1.09
0.65
0.38
100
12.53
9.95
8.39
6.42
4.42
3.03
2.32
1.45
0.88
0.51
8.03.10
Rev. 6106

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix D
Erosion Control Standard Specifications
ENVIRON

1
Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
IAppendix D-1: Temporary Construction Entrance/Exit
Construction Specification:
• Stone size - use 2-Y washed stone, or reclaimed or recycled concrete equivalent.
• Length - 50 feet minimum.
• Thickness - six (6) inches minimum.
• Width - 12 feet minimum.
• Filter cloth - will be placed over the entire area prior to placing of stone.
• Surface water - all surface water flowing or diverted toward construction entrances will be
piped across the entrance. If piping is impractical, a mountable berm with 5:1 slopes will be
permitted.
• Maintenance - the entrance shall be maintained in a condition which will prevent tracking of
sediment onto public rights -of -way or streets. All sediment spilled, dropped, or washed onto
public rights -of -way will be removed immediately. If found necessary, wheels will be
cleaned to remove sediment prior to entrance onto public rights -of -way.
• If washing is required, it will be done on an area stabilized with stone and which drains into
an approved sediment trapping device.
• Periodic inspection and needed maintenance will be performed after each rain event.
Construction Entrance Geotextife Fabric Specifications
Fabric Properties
Minimum
Acceptable
Value
Test Method
Grab Tensile Strength (lbs.)
200
ASTM D1682
Elongation at Failure (%)
50
ASTM D1682
Mullen Burst Strength (PSI)
190
ASTM D3786
Puncture Strength (Ibs.)
40
ASTM D751 (modified)
Equivalent Opening Size
40-80
US Std Sieve CW-02215
IAppendix D D-1 ENVIRON

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix D-2: Temporary Sediment Trap
Construction Specification:
• Clear and grub the sediment trap area - dam and crest area -- based on dimensions below
measured from the spillway:
- TS 1: Length 90 feet, width 45 feet, depth 4.5 feet
- TS 2: Length 60 feet, width 30 feet, depth 4.5 feet
- TS 3: Length 30 feet, width 15 feet, depth 4.0 feet
- TS 4: Length 50 feet, width 25 feet, depth 4.5 feet
- TS 5: Length 50 feet, width 25 feet, depth 5.0 feet
• Use fill material free of organic matter for constructing the embankments. Place fill in lifts
not to exceed 8" and machine compact. Embankments should be 2 horizontal: 1 vertical
minimum slope.
• Install filter fabric between the embankment and the rip -rap spillway.
• Construct dam and stone spillway to height as specified above, with 2 horizontal: 1 vertical
minimum side slopes, bottom width of at least 3 feet and weir length as follows:
- TS 1: 8 feet minimum weir length
- TS 2-5: 4 feet minimum weir length
• Ensure that the spillway crest is level and at least 1.5 feet below the top of the dam at all
points.
• Use Class "B" erosion control stone for spillway section and DOT #5 or #57 washed stone
on inside face of spillway to control drainage.
• Use temporary diversions and rip -rap as necessary to prevent erosion at the inlet to the
sediment trap.
• Stabilize the embankment and all disturbed areas above the sediment pool and below the
embankment as described in the vegetation plan.
• Install porous baffles as specified in Appendix D-10 and Figure 9.
• Extend apron downstream of spillway at least 10 feet past the toe of the slope.
Maintenance Requirements:
• Inspect sediment traps at least weekly and after each significant (0.5 inches or greater)
rainfall event and repair immediately.
• When sediment has accumulated to one-half the design depth of the trap, remove sediment
and restore the trap to its original dimensions. Place the sediment that is removed in the
designated disposal area, and replace the part of the gravel facing that is impaired by
sediment.
• Check the structure for damage from erosion or piping.
Appendix D D-2 ENVIRON I I

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
• Periodically check the depth of the spillway to ensure it is a minimum of 1.5 feet below the
low point of the embankment.
• Immediately fill any settlement of the embankment to slightly above design grade.
• Any riprap displaced from the spillway must be replaced immediately.
rAfter all sediment -producing areas have been permanently stabilized; remove the structure
and all unstable sediment. Smooth the area to blend with the adjoining areas, and stabilize
properly.
1
IAppendix D D-3 ENVIRON

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix D-3: Temporary Diversions
Construction Specification:
• Clear and grub the diversion area.
• Construct berm to full dimensions provided below — allow for 10% settling. Use coarse
aggregate to construct berms at vehicle crossings.
Diversion Channel
Bottom Width (ft.)
Depth (ft.)
Side Slopes
CH 1
2
1.5
3H: 1 V
CH 2
2
2
3H: 1V
CH 3
2
2.5
3H: 1 V
CH 4
2
1.5
3H: 1 V
CH 5
2
1.5
3H: 1 V
CH 6
2
2
3H: 1 V
CH 7
2
2.5
3H: 1 V
CH 8
2
2.5
3H: 1 V
• Compact the berm with wheels of construction equipment.
• Ensure the top of the berm is on design grade or higher at all points.
• Lay erosion control mat with 1.75 Ibs.ISF or greater shear stress rating along the flow
channel and secure in accordance with manufacturer's specification.
• Install outlet stabilization as required.
• Install outlet stabilization as required.
Maintenance Requirements:
• Inspect temporary diversions once a week and after every rainfall.
Immediately remove sediment from the flow area and repair the diversion ridge.
. Carefully check outlets and make timely repairs as needed.
• When the area protected is permanently stabilized, remove the ridge and the channel to
blend with the natural ground level and appropriately stabilize it.
1
Appendix D D-4 ENVIRON I I

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix D-4: Check Dams
Construction Specification:
Clearing and grub the check dam area as necessary.
- Construct dam on filter fabric to full dimensions shown in the detail using NC DOT Class B
stone lined with NC DOT #5 or #57 stone on the upstream end.
Keep center stone at least 9 inches below the natural ground level where the dam meets the
channel banks.
o Extend stone at least 1.5 feet beyond the ditch bank to keep water from cutting around the
ends of the check dam.
- Protect the channel below the lowest check dam and ensure area above the upstream
check dam is stable.
Maintenance Requirements:
- Inspect check dams and channels at least weekly and after each significant (0.5 inches or
greater) rainfall event and repair immediately.
Clean out sediment, straw, limbs, or other debris that could clog the channel when needed.
- Anticipate submergence and deposition above the check dam and erosion from high flows
around the edges of the dam. Correct all damage immediately.
• If significant erosion occurs between check dams, additional measures can be taken, such
as installing a protective liner in that portion of the channel.
- Remove sediment accumulated behind the check dams as needed to prevent damage to
-� channel vegetation, allow the channel to drain through the stone check dam, and prevent
large flows from carrying sediment over the dam.
- Add stones to check dams as needed to maintain design height and cross section.
Appendix D-5: Outlet Stabilization
Construction Specification:
' - Excavate to 15 inches below channel outlet.
Minimum length of apron is 10 feet from the outlet.
• Place filter cloth — 10 oz./SF nonwoven geotextile — between soil and rip -rap; overlap 1.0
feet at seems.
• Carefully place NC DOT Class B rip -rap; rip -rap should have a zero grade level with outlet of
channel.
Maintenance Requirements:
- Inspect riprap outlet structures weekly and after significant (0.5 inches or greater) rainfall
events to see if any erosion around or below the riprap has taken place, or if stones have
been dislodged. Immediately make all needed repairs to prevent further damage.
Appendix D D-5 ENVIRON

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix D-S: RECP and Rip -rap Channels
RECP Construction Specification - Channel Slopes:
• Install RECP capable of withstanding a minimum shear stress of 1.75 Ibs./SF and tensile
strength of 75 lbs./ft.
• Excavate 6-inche by 6-inch anchor trench at a location along the slope such that the erosion
mat will overlap at least 1.0 feet with channel bottom filter fabric, and anchor RECP in the
trench as indicated in Figure 10.
• Unroll the RECP down/along the slope and overlap 1 foot with channel bottom filter fabric
and adjacent RECP.
• Pin RECP to ground every 3 feet in a center -to -center pattern using 11 gauge staples
measuring at least 6 inches long and 1-inch wide.
Maintenance Requirements:
• Inspect RECP at least weekly and after each significant (0.5 inches or greater) rainfall event
and repair immediately.
• Good contact with the ground must be maintained, and erosion must not occur beneath the
RECP.
• Any areas of the RECP that are damaged or not in close contact with the ground shall be
repaired and stapled.
• If erosion occurs due to poorly controlled drainage, the problem shall be fixed and the
eroded area protected.
• Monitor and repair the RECP as necessary until ground cover is established.
Rip -Rap Construction Specification -- Channel Bottom:
• Excavate to 12 inches below design grade or fill up to 12 inches below design grade.
• Place filter cloth - 10 oz./SF nonwoven geotextile - between soil and rip -rap; overlap 1.0
feet at seems and secure with metal pins or as specified by manufacturer.
• Carefully place NC DOT Class B rip -rap so as not to puncture the filter fabric on the design
grade for the channel.
Maintenance Requirements:
• In general, once a rip -rap installation has been properly designed and installed it requires
very little maintenance.
• Rip -rap should be inspected periodically for scour or dislodged stones. Control of weed and
brush growth may be needed in some locations.
Appendix D D-6 ENVIRQN I I

1
Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
0
I
11
Appendix D-7: Sediment Fence Specification
Materials:
Silt Fence Fabric: The fabric shall meet the following specifications unless otherwise approved
by the appropriate Erosion and Sediment Control Plan approval authority.
Silt Fence Geotextile Fabric Specifications
Fabric Properties
Minimum
Acceptable Value
Test Method
Grab Tensile Strength (Ibs.)
90
ASTM D1682
Elongation at Failure (%)
50
ASTM D1682
Mullen Burst Strength (PSI)
190
ASTM D3786
Puncture Strength (lbs.)
40
ASTM D751 (modified)
Slurry Flow Rate (gal/min/so)
0.3 (max)
Equivalent Opening Size
40-80
US Std Sieve CW-02215
Ultraviolet Radiation Stability (%)
90
ASTM G-26
Fence Posts (for fabricated units): The length will be a minimum of 48 inches. Wood posts will
be of sound quality hardwood with a minimum cross sectional area of 3.0 square inches. Steel
posts will be standard T and U section weighing not less than 1.00 pound per linear foot.
Wire Fence (for fabricated units): Wire fencing will be a minimum 14 gauge with a maximum 6
in. mesh opening, or as approved.
Prefabricated Units: Envirofence, Geofab, or approved equal, may be used in lieu of the above
method and the units will be installed as per manufacturer instruction and ESC Standards.
Installation:
. Excavate a 4-inch wide by 8-inch deep trench along the lower perimeter of the site.
• Unroll a section at a time and position the posts against the back (downstream) wall of the
trench (net side away from direction of flow).
• Drive the posts into the ground until the netting is approximately 2 inches from the trench
bottom.
• Lay the toe -in flap of fabric onto the undisturbed bottom of the trench, backfill the trench and
tamp the soil. Steeper slopes require an intercept trench.
IAppendix D D-7 ENVIRON

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Maintenance Requirements:
• Inspect sediment fences at least once a week and after each rainfall. Make any required
repairs immediately.
• Should the fabric of a sediment fence collapse, tear, decompose, or become ineffective,
replace it promptly.
• Remove sediment deposits as necessary to provide adequate storage volume for the next
rain and to reduce pressure on the fence. Take care to avoid undermining the fence during
cleanout.
• Remove all fencing materials and unstable sediment deposits and bring the area'to grade
and stabilize it after the contributing drainage area has been properly stabilized.
Appendix D-8: Land Grading
Installation:
• Scarify areas to be topsoiled to a minimum depth of 2 inches before placing topsoil.
• Clear and grub areas to be filled by removing trees, vegetation, roots or other objectionable
material that would affect the planned stability of the fill.
• Place all fill in layers not to exceed 9 inches in thickness and compact the layers as required
to reduce erosion, slippage, settlement, or other related problems.
• Keep diversions and other water conveyance measures free of sediment during all phases
of development.
• Permanently stabilize all graded areas immediately after final grading is completed on each
area in the grading plan. Apply temporary stabilization measures on all graded areas when
work is to be interrupted or delayed for 30 working days or longer_
Maintenance Requirements:
• Periodically check all graded areas and the supporting erosion and sedimentation control
practices, especially after heavy rainfalls.
• Promptly remove all sediment from diversions and other water -disposal practices.
If washouts or breaks occur, repair them immediately.
• Prompt maintenance of small eroded areas before they become significant gullies is an
essential part of an effective erosion and sedimentation control plan.
Appendix D 0-8 ENVIRON I I

Erosion and Sedimentation Control Plan —
Phase 2 Removal Action
Appendix D-9: Surface Roughening
Installation:
• Groove cut slopes with a gradient steeper than 3:1.
• Groove soil surface using any appropriate implement that can be safely operated on the
slope, such as disks, tillers, spring harrows, or the teeth on a front-end loader bucket.
• Do not make such grooves less than 3 inches deep nor more than 15 inches apart.
• Immediately seed and mulch roughened areas to obtain optimum seed. germination and
growth.
Maintenance Requirements:
• Periodically check the seeded slopes for rills and washes. Fill these areas slightly above the
grade, then reseed and mulch as soon as possible.
Appendix D-10: Porous Baffles
Installation
• Grade the basin so that the bottom is level from front to back and side to side.
• Install posts or saw horses across the width of the sediment trap.
• Install steel posts to a depth of 24 inches, space a maximum of 4 ft. apart along the bottom
and sides of the basin. The top of the fabric should be 6 inches higher than the invert of the
spillway. The tops of baffles should be 2 inches lower than the top of the berms.
• Install three rows of baffles as specified on Figure 9.
• When using posts, add a support wire or rope across the top of the measure to prevent
sagging
• Wrap porous material, like jute backed by coir material over the support structure (post and
wire or sawhorse). The fabric should have 5-10% openings in the weave. Attach fabric to
' support structure with zip ties, wire or staples.
• Anchor the bottom of the fabric into a trench or pin with 8-inch erosion control matting
staples.
• Use a continuous piece of fabric across the basin; do not splice fabric together.
Maintenance:
• Inspect baffles at least once per week and after every rainfall. Make any required repairs
immediately
- Be sure to maintain access to the baffles. Replace damaged baffles or fabric immediately.
• Remove sediment deposits that reach half the height of the baffle.
• After the contributing drainage area has been properly stabilized, remove all baffle materials
and unstable sediment deposits, bring the area to grade, and stabilize.
Appendix D D-9 ENVIRON