20140957 Ver 2_Additional Info Received_20170712

Burdette, Jennifer a
From: Spencer Trichell (Services - 6) < [e-mail] >
Sent: Wednesday, July 12, 2017 8:43 AM
To: Burdette, Jennifer a
Cc: Robert M Bisha (Services - 6); Richard B Gangle (Services - 6); Wade Hammer
Subject: ACP - 401 Response to Comments
Attachments: 20170712 ACP NCDEQ Information Request Responses - Out.pdf
Jennifer,
On behalf of Atlantic Coast Pipeline, LLC, I am providing our response to your comments on the ACP
401 Water Quality Certification application. A check in the amount of $2,147.06 for public notice
expenses, per your letter, was sent under separate cover to Karen Higgins and should be delivered
today. Please feel free to contact me if you have questions.
Regards,
Spencer Trichell
Environmental Consultant - Atlantic Coast :Pipeline
Dominion Energy Services, Inc.
5000 Dominion Blvd
Glen Allen, VA 23060
0:(804)-273-3472 M.•(804)-263-5980
spencer. trichella,dominionenergy.com
G
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Dominion Energy Services. ft
5000 Dorninocn Boulevard
Glen Allen, VA 23060
DominionEnergy,com
July 12, 2017
3 5
9FOITITOTOTUrraw
Karen Higgins
401 & Buffer Permitting Branch
North Carolina Department of Environmental Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
; OEM
F*_*
... Dominior
WW Energye
Re: Dominion Energy Transmission, Inc., Atlantic Coast Pipeline — Response to North
Carolina Department of Environmental Quality; Request for Additional Information
for 401 Water Quality Certification Review
Dear Ms. Higgins:
Please find enclosed response materials to the North Carolina Department of Environmental Quality
(NCDEQ), request for additional information that was dated June 27, 2017, and sent to Atlantic Coast
Pipeline, LLC (Atlantic) Atlantic is submitting the responses for the Atlantic Coast Pipeline Project
(ACP or Project) by July 14, 2017, as requested in the NCDEQ request letter, to assist the NCDEQ in
review of the 401 Water Quality Certification /Buffer Authorization for the ACP in North Carolina.
Atlantic is a company fon-ned by four major U.S. energy companies — Dominion Energy, Duke
Energy, Piedmont Natural Gas, and Southern Company Gas. The company was created to develop,
own, and operate the proposed ACP, an approximately 600 mile -long, interstate natural gas
transmission pipeline system designed to meet growing energy needs in Virginia and North Carolina,
Atlantic has contracted with Dominion Energy Transmission, Inc, a subsidiary of Dominion, to seek
authorization from the Federal Energy Regulatory Commission under Section 7(c) of the Natural Gas
Act to construct, own, operate, and maintain the ACP on behalf of Atlantic.
Atlantic appreciates your efforts and coordination to date. Please contact Richard Gangle at (804)
273-2814 or [e-mail], if there are questions regarding this submittal.
Please direct written responses to:
Richard B. Gangle
Dominion Energy Services, Inc.
5000 Dominion Boulevard
Glen Allen, Virginia 23060

July 12, 2017
Atlantic Coast Pipeline
NCDEQ Information Request Response
Sincerely,
Robert M, Bisha
Technical Advisor, Atlantic Coast Pipeline
cc: Richard B. Gangle (Dominion Energy)
Attachments:
® Response Materials and Appendices
• Check for Reimbursement of Public Hearing Advertisements (arrival separately attention to
Ms. Karen Higgins)
PA

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
Atlantic Coast Pipeline
Response to NCDEQ Reguest for Additional Information: dated June 27, 2017
July 12, 2017
The North Carolina Department of Environmental Quality (NCDEQ) indicated in a
"Request for Additional Information and Notice of Public Hearings", dated June 27, 2017 that on
May 8, 2017, the Division of Water Resources (Division) received the Atlantic Coast Pipeline,
LLC (Atlantic) application requesting an Individual Water Quality Certification/Buffer
Authorization for the Atlantic Coast Pipeline Project (ACP or Project). The Division stated that
the response to the request for information is necessary to process the Atlantic Coast Pipeline
application [15A NCAC 02H .0502(c), 15A NCAC 0213.0233 (8) and .0259 (8)]. Atlantic has
reviewed the NCDEQ request for information and is providing the following responses and
attached information according to the NCDEQ request.
Each of the requests for information, as numbered in the NCDEQ request, are provided
below, followed by Atlantic's response in italics:
1. Right -of -Way Configuration (p 13-14) - Explain the permanent right-of-way (ROW)
maintenance proposed within riparian buffers subject to the Neuse and Tar -Pamlico
Riparian Buffer Rules [15A NCAC 0213 .0233 & .0259]. If the permanent ROW
maintenance proposed for wetlands is not also planned for protected riparian buffers,
then mitigation would be required for the impact to these buffers. A table
summarizing the different ROW widths and maintenance methods to be employed
for each habitat, resource and river basin would be helpful.
Response: Atlantic is not proposing to use wetland maintenance measures for
riparian buffers. Atlantic proposed mitigation for buffer impacts in the Water Quality
Certification/Buffer Authorization. The Table I below describes the maintenance
type for areas both within and outside of the Tar -Pamlico and Neuse watersheds.

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
Table I
Maintenance Corridors within the Permanent Easement and Vegetation Maintenance Corridors for
the Atlantic Coast Pipeline In
North Carolina
Area within Permanent
Easement —
Watershed (50oot 30.foot centered over pipeline
10 eet centered over i eline
Outside of the wetland Selective hand clearing of
Where feasible, mowing over
Within Neuse/Tar-Pamlico- maintenance corridor deep rooted vegetation (trees);
the pipeline to maintain
Wetland allowed to revegetate shrubs and herbaceous
herbaceous vegetation
naturally vegetation allowed to grow.
Within Neuse/Tar-Pamlico- Upland
Outside Neuse Tar -Pamlico -
Wetland
Outside Neuse Tar -Pamlico -
Full right-of-way mowed
annually
Outside of the wetland
maintenance corridor
allowed to revegetate
naturally
Full right-of-way mowed
N/A
Selective hand clearing of
deep rooted vegetation (trees);
shrubs and herbaceous
vegetation allowed to grow.
N/A
N/A
Where feasible, mowing over
the pipeline to maintain
herbaceous vegetation
N/A
2. Waterbody Crossings (p. 17) - Clarify whether temporary crossings will remain in-place
after the initial ROW clearing until construction and restoration are complete, and
p r o v i d e an estimate of the length of time these structures will be in-place. Provide a
description of the type and number of construction equipment that will be allowed
onepass through waterbodies before bridges are installed.
Response: Where waterbodies will be crossed with a temporary crossing, Atlantic
will leave the temporary crossing (i.e., bridge, rock flume, etc.) in place until
construction activities associated with final seeding and stabilization occurs.
Atlantic anticipates that this will take no longer than 12 months total, from
placement of the temporary crossing to removal. All temporary bridges will be
removed and waterbodies restored to preconstruction contours after the final seeding
and stabilization activities are complete.
Equipment that will utilize the one pass through waterbodies will typically include
track excavators and bulldozers as well as backhoes that will be utilized for
placement of the temporary crossings ahead of or at the time of right-of-way tree
clearing activities. The types and sizes of equipment will vary based on the size of
the waterbody crossing, however the equipment listed above will be the primary
piece of equipment utilized to install bridges that will use the one -pass at perennial
waterbodies.
3. Open -Cut Method (p. 18) - Provide an explanation of and details showing how
turbidity curtains or other sediment barriers will be installed where the open -cut
method will be utilized to cross stream and wetland complexes.

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
Response: Wetlands selected for open -cut crossings are periodically inundated, and
have little or no discernable flow through them under normal conditions. Atlantic has
determined that the use of an open -cut crossing method is most appropriate for these
situations in order to expedite the crossings and minimize impacts to the floodplain
ecosystems.
Construction and maintenance specifications outlined in North Carolina Erosion and
Sediment Control Planning and Design Manual VII 6.62 (Silt Fence) and applicable
turbidity curtain installation guidance based on manufacturer's recommended
installation and use. In the event of conflicting specifications between agency guidance
and manufacturer specifications, the manufacturer's recommendations on proper
installation and use of a product will be followed. The primary silt fence product
planned for use on the Atlantic Coast Pipeline is a patented belted silt retention fence
(BSRF) product. In wetlands and waterbodies, the Priority I (green band) BSRF will be
used, which is a heavy-duty silt fence material constructed with a 36 -inch, non -woven,
spun -bond fabric with an internal scrim incorporated into the fabric for additional
strength and durability. The system utilizes wood stakes spaced at 4 feet intervals and a
specific method of attachment. The system is functionally equivalent to wire back and
metal steel post silt fence and is designed for the protection of high priority areas,
including wetlands and waterbodies. In addition, in North Carolina, according to
discussions with NCDEQ, coir logs and/or compost filter socks may also be used along
the construction workspace within wetlands. Proper installation and daily inspection
and maintenance of the BSRF, and other erosion control devices (ECDs) in accordance
with installation locations depicted in the site-specific construction alignment sheets
prior to and during trenching operations, stockpiling of saturated trench material,
lowering -in or floating the pipeline into the trench, and during backfilling of the trench
should adequately contain trench spoils and turbidity within the confines of the
construction right-of-way.
In these and other areas where the depth of inundated water exceeds 2 feet, or generally
where the water depth is too great to be adequately contained by pyramiding coir logs or
compost filter socks at initial installation or if, during construction, water levels are
expected to rise above a 2 -foot depth because of an unpredicted storm event, Type 2
turbidity curtains should be installed. Based on analysis of similar wetland/swamp
complexes in Virginia, where broad flow occurs across a lowland system, peak flow
velocities in those cases of]. 6feet per second or less were expected. Similar low rates of
flow are expected at crossings in North Carolina where open -cut crossings are proposed.
These low flow rates are not expected to affect the ability of the turbidity curtain to
function as designed.

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
If sections of these wetlands contain waters deeper than 2 feet, or generally where the
water depth is too great to be adequately contained by pyramiding coir logs or compost
filter socks at initial installation, turbidity curtains would be deployed in place of, or in
addition to, silt fence or other ECDs. In selecting and installing turbidity curtains,
Atlantic will adhere to the construction and maintenance specifications outlined in the
North Carolina Erosion and Sediment Control Planning and Design Manual or
manufacturer specifications, and the type of curtain should be selected based on the
anticipated flow conditions. The ends of the curtain should extend to the edge of the
inundated areas containing, or expected to contain the greater water depths present
when the curtains are used to allow sediments to resettle in areas with limited flow.
BSRF or other ECDs may be required at the ends of the curtains to direct suspended
sediment into shallower, low flow areas.
Throughout the construction process, Atlantic will also follow the Federal Energy
Regulatory Commission (FERC) Wetland and Waterbody Construction and Mitigation
Procedures to avoid or minimize impacts on water quality. Environmental Inspectors
will perform routine inspections of all temporary erosion and sediment control measures
in accordance with Atlantic's approved stormwater pollution prevention plan, FERC
requirements, and associated regulations, where applicable.
4. Horizontal Directional Drill (HDD) Method (p. 22) - Clarify whether equipment will
be allowed to cross waterbodies that will be crossed by HDD. Also, provide an
estimate of the amount of water that will be withdrawn from each waterbody to be
crossed by this method and the anticipated pumping rate.
Response: No mechanized equipment will be allowed to cross waterbodies where the
HDD method is employed. Water will be withdrawn from the Tar River and
Contentnea Creek for HDD operations and hydrotesting of drill segments.
Withdrawal volumes and rate estimates are presented in Table 2, below.
Table 2.
Estimated Water Withdrawal and Pump Rates from Surface Waters at HDD Crossings for the Atlantic Coast Pipeline in North Carolina
Estimated Water
Estimated Water
Withdrawal from
Withdrawal from
Waterbodies for
Estimated
Waterbodies for HDD
Hydrotesting of Drill
Pump Rate
Drill Mud
Segment
(gallons per
RID Feature ID Flow Regime Feature Name Milepost
(gallons)
(gallons)
minute)
AP -2 snao011 Perennial Tar River 59.4
1,205,000
76,000
500
AP -2 swic002 Perennial Contentnea Creek 73.6
1,055,000
67,000
500
5. Wetlands (p. 25) -Clarify that filter fabric will be placed beneath riprap in
wetlands areas to facilitate restoration.

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification July 12, 2017
Response: Atlantic does not propose the use of riprap in wetlands.
6. Construction Minimization (p. 79) - Clarify that refueling will be conducted at least 100
feet from waterbodies and wetlands means that refueling will be conducted at least 100
feet from the water's edge of these features.
Response: Atlantic will restrict refueling activities within 100 feet of the water's edge of
waterbodies and 100 feet from the edge of wetlands. However, the FERC Procedures
allows refueling within 100 feet of waterbodies and wetlands "...only if the
Environmental Inspector determines that there is no reasonable alternative, and the
project sponsor and its contractors have taken appropriate steps (including secondary
containments structures) to prevent spills and provide for prompt cleanup in the event of
a spill. " In addition, some activities such as operating pumps for dry crossings may
require refueling within 100 feet of these features. In those instances, refueling would
occur within secondary containment structures and fuel would not be stored within 100
feet of the feature.
7. Cumulative Impacts (p. 86-91) -The Division has several questions about secondary
impacts that may occur due to construction of the ACP:
a. Are there existing distribution facilities to serve the major utilities that are
currently subscribed pursuant to precedent agreements?
Response: Yes, there are existing distribution facilities owned by Piedmont Natural
Gas (Piedmont), a local distribution company that is subscribed pursuant to a
precedent agreement, at each of the proposed M&R Stations. Piedmont also
operates the primary distribution network through which currently -subscribed
customer, Duke Energy, is provided service (see response to Question 7.c. below).
b. Are there existing distribution facilities at each of the nine metering and
regulating stations proposed in North Carolina?
Response: While there are nine metering and regulation (M&R) stations proposed
for the entire ACP Project, only three are located in North Carolina. There are
existing distribution facilities owned by Piedmont Natural Gas at each of these M&R
Stations. While Piedmont currently operates an existing distribution network, they
have proposed several modifications or upgrades to their facilities at various
locations in response to the new supplies from ACP. A 26 -mile, 30 -inch diameter
distribution pipeline in Robeson, Scotland, and Richmond Counties, North Carolina is
also proposed by Piedmont.

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification July 12, 2017
c. What percentage or volume of new transportation capacity will be used for
conversion of coal-fired plants to natural-gas versus the amount for new
facilities?
Response: The intended uses of the gas delivered to each of the three delivery points
in North Carolina are summarized in Table 3, below. Atlantic does not have specific
details regarding conversion of coal-fired plants to natural gas versus the amount for
new facilities as ACP is a transmission pipeline that provide gas to customers that then
utilize the natural gas according to their operational needs. Duke Energy will utilize
ACP transportation service to meet portions of its existing and future power generation
facilities, and information available to Atlantic regarding the facilities that will utilize the
gas are summarized further in the text below.
Table 3.
Intended Use of Natural Gas from the Atlantic Coast Pipeline to Each Delivery Point in North Carolina
Delivery Interconnect
Delivery
Intended Use
Point Customer
Volume
(dekathenWday
Smithfield Piedmont Natural Gas
985,000
PowerGen -74%
M&R
LDCs — 26%
Fayetteville Piedmont Natural Gas
150,000
Power Gen —100%
M&R
Pembroke Piedmont Natural Gas
885,000
Power Gen — 82%
M&R
LDCs —18%
LDC — Local Distribution Company
With respect to existing facilities, the ACP transportation service, through interconnects
with Piedmont Natural Gas, will provide an essential and needed additional fuel source
for the following existing Duke Energy Progress (DEP) and Duke Energy Carolinas
(DEC) facilities:
• DEP HE Lee Energy Complex, located in Goldsboro, NC totaling approximately
1, 047 Megawatts (MW)/910 MW (winter/summer) (combined cycle)
• DEP Wayne County Station, located in Goldsboro, NC totaling approximately 959
MW/ 863 MW (winter/summer) (5 combustion turbines)
• DEP Sutton Energy Complex, located in Wilmington, NC totaling approximately 717
MWI622 MW (winter/summer) (combined cycle)
• DEP Smith Energy Complex, located in Hamlet, NC totaling approximately 1,227
MW/1, 088 MW (winter/summer) (combined cycle) and approximately 916 MW1780
MW (winter/summer) (5 combustion turbines)
• DEC Buck Station located in Rowan County, NC totaling approximately 732 MW /
690 MW (winter/summer) (combined cycle)

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
Also, DEP will complete an approximately 100 MW/84 MW (winter/summer) Sutton fast
start/black start combustion turbine (CT) in 2017 that will be able to utilize the
transportation service from ACP.
With respect to proposed power generation facilities, DEP and DEC each prepare a
planning document called the Integrated Resource Plan (IRP), which is provided by each
utility to both the North Carolina Utilities Commission and the Public Service
Commission of South Carolina. These planning documents detail the generation needed
for each utility to meet the forecasted electricity requirements for its customers over the
next 15 years. The 2016 IRP's are the most recent projection of how each utility's energy
portfolio will look over the next 15 years, based on current assumptions.
The 2016IRPs identify the need for additional natural gas resources that are economic,
highly efficient, and reliable. The planning documents outline the following information
relative to new natural gas resources. The locations of these proposed facilities have not
been finalized. However, both DEC and DEP are evaluating siting locations that would
provide access to ACP. Quantities of natural gas delivered by ACP would be available
as a potential fuel source for these needed new gas powered electric generation assets.
DEC:
New natural gas combined cycle approximately 750MW that will be placed into
service in the second half of 2017 in Anderson County, South Carolina.
Plan for a DEC 1,221 MW/1,123 MW (winter/summer) natural gas combined cycle in
2023.
• Plan for DEC 468 MW/435 MW (winter/summer) of CT resources in 2025.
DEP:
• New approximately 560MW natural gas combined cycle that will be placed into
service in late 2019 in Asheville, NC.
• Plan for a 1,221 MW/1,123 MW (winter/summer) natural gas combined cycle in
2022.
• Plan for a potential 186 MW/161 MW (winter/summer) CT in late 2023.
• Plan for 468 MW/435 MW (winter/summer) of CT capacity in 2023.
• Plan for 468 MW/435 MW (winter/summer) of CT capacity in 2026.
• Plan for 468 MW/435 MW (winter/summer) of CT capacity in each year from 2028 to
2030.
• Plan for 936 MW/870 MW (winter/summer) of CT capacity in 2031.
With the existing facilities and the proposed gas generation growth in North Carolina,
the transportation service from ACP is critical to the growing gas generation needs of
DEP and DEC.

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
8. Explain how in -stream blasting and blasting within 50 feet of a waterbody will be
accomplished, including those crossings that are proposed to be installed using the
open -cut method.
Response: Blasting in -stream and blasting within 50 feet of waterbodies will only be
used when traditional means of open -cut or wet trench crossing methods failed or are
deemed impractical due to constraints imposed by stream crossing time limits. If
required, blasting will primarily occur at dry crossings, after the work area has been
isolated from stream flow. If blasting is necessary in a flowing waterbody, the use of
controlled blasting techniques, where small, localized detonations are utilized, will avoid
or minimize the impacts of blasting and limit rock fracture to the immediate vicinity of
these activities. Immediately following blasting, Atlantic and DTI will remove shot rock
that impedes stream flow. Blasting techniques will be in compliance with Federal, State,
and local regulations governing the use of explosives and in accordance with the
Blasting Plan and the Plan and Procedures (Blasting Plan attached as Appendix A).
Throughout the construction process, Atlantic and DTI will follow the Procedures to
avoid or minimize impacts on water quality. Construction activities will be scheduled so
that the trench is not excavated across the waterbody until immediately prior to pipe
laying activities. The duration of in -stream construction activities (excluding blasting, if
required) will be limited to 24 hours across minor waterbodies (those 10 feet in width or
less) and 48 hours across intermediate waterbodies (those between 10 and 100 feet in
w idth).
9. Sediment and erosion control designs for project areas within waters orwatersheds
designated as PNA, SA, WS -1, WI -II, HQW, ORW must comply with the requirements
set forth in 15A NCAC 048 .0124 - Design Standards in Sensitive Watersheds.
Response: Atlantic did not identify any individual waters or watersheds with the
above designations within the limits of disturbance.
10. Although a discrete channel is not present, add named streams (e.g., Starlins, Mingo,
Black River etc.) that occur within wetland complexes to the Waterbody Crossing
Table for reference.
Response: Atlantic has revised Appendix C-1 Wetland and Waterbody Crossings for
the Atlantic Coast Pipeline within the U.S. Army Corps of Engineers Wilmington
District. Revised cells are shaded gray. The revised table is included in Appendix B.
11. There are several waterbodies that are proposed to be crossed by the open -cut method
that are less than 20 feet in width and do not have adjacent wetlands that appear to be

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
inundated. These should be changed to a dry method or provide an explanation as to
why this is not practical for each waterbody that meets these criteria.
Response: Atlantic evaluated 33 crossings proposed as open -cut crossings that are
less than 20 feet in width. Many of these waterbodies are either small waterbodies
contained within a larger wetland or very narrow waterbodies that can be crossed
more quickly and with less spatial impact via open -cut than they can with a dry
crossing method Table 4, below, provides responses for each of the 33 locations
reviewed.
Table 4.
Atlantic Coast Pipeline — Review, of Waterbodies Less Than 20 Feet Wide and Planned as Open -Cut in North Carolina
Milepost
Feature
Flow
Centerline
Reason for Open Cut
ID
Regime
Crossing
Width
(feet)
AP -2
11.8
ohlc001
Open
I
This is an open water pond that has marry characteristics of a wetland The
Water
adjacent wetland makes it impractical to avoid The crossing will be treated as
an inundated wetland during crossing according to the FERC Procedures.
20.1
shlh008
Perennial
15
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
folloiving the FERC Procedures.
26.6
shlh009
Perennial
9
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
folloiving the FERC Procedures.
27.7
shlh012
Intermittent
5
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
folloiving the FERC Procedures.
29.8
shla001
Perennial
16
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
42.2
snah026
Perennial
9
This is an inundatedwetlandwith a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
44.4
snac001
Perennial
6
This is an inundatedwetlandwith a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
44.8
snag012
Perennial
7
This is an inundatedwetlandwith a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
47.6
snah010
Intermittent
9
This is a narrow intermittent waterbody unlikely to require a dry -crossing. In
addition, there would be limited space to set up for a dry crossing. In this
situation, a dry crossing would be more impact (longer duration and greater
workspace) than an open cut.
57.0
snah019
Intermittent
10
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
67.7
s14,10001
Intermittent
8
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
folloiving the FERC Procedures.
67.8
swio002
Perennial
2
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
folloiving the FERC Procedures.
69.3
s14,10005
Perennial
9
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
folloiving the FERC Procedures.
69.7
swio007
Perennial
9
This is an inundatedwetlandwith a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
Table 4.
Atlantic Coast Pipeline — Review, of Waterbodies Less Than 20 Feet Wide and Planned as Open -Cut in North Carolina
Milepost
Feature
Flow
Centerline
Reason for Open Cut
ID
Regime
Crossing
Width
(feet)
70.9
swio013
Perennial
19
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
71.0
s14,10011
Perennial
16
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
71.0
swio012
Intermittent
10
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
74.9
swip003
Ephemeral
5
This is an inundatedwetlandwith a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
84.6
sjop001
Intermittent
15
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
85.9
sjoo003
Perennial
8
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
86.5
sjoo004
Perennial
5
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
97.5
sjoo008
Perennial
9
This is an inundatedwetlandwith a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
102.8
siob005
Intermittent
4
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
102.8
sjob004
Perennial
4
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
103.9
sjob003
Perennial
4
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
110.5
sjop016
Ephemeral
3
This is an ephemeral ditch and doesn't need a dry crossing. In addition, this
waterbody is adjacent to a large wetland that will be crossed via open -cut
according to the FERC Procedures.
116.9
ssao001
Perennial
8
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
folloiving the FERC Procedures.
117.2
ssap003
Perennial
17
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
121.9
ssao004
Intermittent
8
This is an intermittent stream / drainage which feeds a stock -pond, unlikely to
require a dry crossing. In addition, there would be limited space to set up for a
dry crossing. In this situation, a dry crossing would be more impact (longer
duration and greater workspace) than an open cut.
125.2
scmc004
Intermittent
7
Narrow intermittent waterbody- In this situation, a dry crossing would be more
impact (longer duration and greater workspace) than an open cut.
126.8
scmp009
Perennial
19
This is an inundated wetland with a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
130.1
scmc005
Intermittent
3
Narrow intermittent waterbody- In this situation, a dry crossing would be more
impact (longer duration and neater works ace) than an open cut.
AP -3
5.9
snrp017
Perennial
8
This is an inundatedwetlandwith a waterbody channel contained within the
wetland and will therefore be treated as a wetland crossing during construction
following the FERC Procedures.
10

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
12. Figure A-4, Page 48 - Stream dkwc_nc_004 is missing from the Waterbody Crossing
Table. Please verify that all impacts shown on the Aerial Sheets are included within
the Waterbody Crossing Table.
Response: Atlantic reviewed the materials submitted to the NCDEQ on May 8, 2017.
dkwgnc004 is located on page C-13 of the Waterbody Crossing Table, as part of
Single and Complete Crossing NC AP -2 186. A revised version of this table is
included as Appendix B.
13. Figure A-4, Page 35 - NC spiny crayfish were observed in Stony Creek. Explain why
Stony Creek was changed from a dry method to open cut.
Response: Stony Creek (snah0l S) at MP 48.8 is a waterbody within a wetland.
Atlantic proposes an open cut in order to minimize impact to the waterbody. An
open cut crossing at this location will be completed more quickly and with less
disturbance than a dam and pump type crossing. Since this waterbody is within a
wetland, Atlantic will reduce the temporary workspace to 75 feet per the FERC
guidelines.
14. Figure A-4, Page 93 - Stream scmc005 is proposed to be crossed using the open -cut
method. This should be changed to a dry method or provide an explanation as to why
this is not practical at this location.
Response: Waterbody scmc005 is 3 ft wide. This stream is essentially a drainage
feature within agricultural fields. A dry crossing is not practical as this small stream
can be crossed more quickly, thereby minimizing impact, using the open cut method.
15. Alignment Avoidance and Minimization.
a. Figure A-4, Page 16 -Three wetland crossings (whlh032s, whlh032f, and
whlh031f) will impact a total of 4.98 acres. Shifting the alignment southeast
would minimize the amount of wetland impacted. This alignment should be
adjusted or provide an explanation as to why this is not practical in this location.
Response: Based on the data available from within Atlantic's 300 -foot -wide survey
corridor, wetlands wh1h032s, wh1h032f, and whlh03lf are continuous to the survey
boundary. Therefore, the pipeline alignment cannot be adjusted within the survey
corridor to avoid or minimize impacts on these wetlands. Additionally, based on
review of desktop data, including digital aerial photography, the wetlands appear to
extend beyond the survey corridor further to the southeast. As a result, a significant
route variation, potentially affecting additional property owners, would be required
to avoid or minimize impacts on the wetlands. Any significant route variation would
extend outside the project survey corridor. If a route variation extends outside the
survey corridor there is a potential that additional sensitive resources, such as
cultural sites or protected species, could be located or affected by such a route
11

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
variation. Moreover, there are other constraints in the area, including a cluster of
residences located just southeast of the current route, which limit the options for
routing the pipeline around the wetlands. For these reasons, a route variation in this
area is not practical.
b. Figure A-4, Page 20 -One wetland crossing (whlh014f) will impact 3.24
acres. Shifting the alignment southeast would minimize the amount of
wetland impacted. This alignment should be adjusted or provide an explanation
as to why this is not practical in this location.
Response: Based on the data available from within Atlantic's 300 -foot -wide survey
corridor, wetland whlh014f is continuous to the survey boundary. Therefore, the
pipeline alignment cannot be adjusted within the survey corridor to avoid or
minimize impacts on this wetland? Additionally, based on review of desktop data,
including digital aerial photography, the wetland appears to extend beyond the
survey corridor further to the southeast along Burnt Coat Swamp. As a result, a
significant route variation, potentially affecting additional property owners, would
be required to avoid or minimize impacts on the wetland? Any significant route
variation would extend outside the project survey corridor. If a route variation
extends outside the survey corridor there is a potential that additional sensitive
resources, such as cultural sites or protected species, could be located or affected by
such a route variation. Moreover, there are other constraints in the area, including
residences located southeast of the current route along Bryant Road, which limit the
options for routing the pipeline around the wetland. Also, a shift further to the
southeast would place the route near the confluence of Breeches Swamp, Jacket
Swamp, and Burnt Coat Swamp, and would likely involve greater wetland crossings.
Atlantic balanced avoidance of nearby residences and avoided larger wetland areas
by placing the route along the proposed alignment. For these reasons, a route
variation in this area is not practical.
c. Figure A-4, Page 41- Stream snah022 runs parallel to the alignment and is
crossed twice. Shifting the alignment northwest within the study corridor will
a v o i d these two stream crossings. This alignment should be adjusted or provide
an explanation as to why this is not practical in this location.
Response: This waterbody crossing is part of a large wetland/waterbody complex
associated with an extensive inundated wetland system along Sapony Creek.
Waterbody snah022 is a side channel (drainage pattern) within the larger lowland
wetland swamp that does not differ significantly from the wetland surrounding the
waterbody. Both the wetland and waterbody are proposed as an open cut given the
inundated conditions at this location. Moving the route northwest would cross
similar inundated wetland areas and likely lengthen the route slightly, which would
increase overall wetland impacts. For this reason, a route variation in this area
would not materially reduce impacts on the wetland/waterbody complex.
d. Figure A-4, Page 51- The alignment crosses three streams (swio010, swio011
& swio012) just above their confluence. Shifting the alignment east within the
study corridor will avoid two of the proposed stream crossings. This
12

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
alignment should be adjusted or provide an explanation as to why this is not
practical in this location.
Response: Atlantic has reviewed this crossing and has determined that, although
wetlands impacts would increase, the route could be shifted to the east within the
survey corridor to reduce the number of stream crossings. Atlantic will seek
authorization from FERC to shift the route alignment in this area to accommodate
the request.
e. Figure A-4, Page 85 - The alignment runs along Beaverdam Swamp and crosses
from the east side to the west side four times. Stream and wetland impacts
could be minimized by reducing the number of crossings. This alignment
should be adjusted or provide an explanation as to why this is not practical in
this location.
Response: While the route crosses Beaverdam Swamp multiple times the route is
positioned as it enters the area from the north to thread through an area of relatively
dense development along Plain View Highway (U.S. Highway 421), including a large
church and many residences, which requires the first crossing of the swamp. The
second crossing is necessary to avoid impacts to a pond on the south side of
Beaverdam Swamp, while also avoiding running the route parallel along the
waterbody in the bottom of Beaverdam Swamp and remain in uplands where
feasible. Further to the south and west the crossing back to the south is necessary to
avoid an agricultural production facility (numerous large buildings), while again
crossing at an angle to avoid the length of wetland crossing and minimize paralleling
Beaverdam Swamp. The final crossing of Beaverdam Swamp is necessary as the
swamp trends to the south and the route must continue to trend westerly to maintain
the orientation of the route toward the Fayetteville M&R Station delivery point. For
these reasons, it is not practical to adjust the route to avoid or minimize the
crossings of Beaverdam Swamp.
f. Figure A-4, Page 111- The Additional Temporary Workspace (ATWS) at
wetland area wcmo022f appears to be avoidable by shifting the ATWS east or
west of the wetland. The ATWS should be relocated or provide an explanation as
to why this alterative is not practical.
Response: This segment of the proposed route is adjacent to an electric transmission
line, which will minimize impacts along the alignment, including impacts associated
with forest fragmentation. The ATWS within wetland wcmo022f is necessary for the
proposed horizontal directional drill (HDD) of the Cape Fear River. This ATWS is
the "drill box" where the HDD drilling equipment will be set up. The HDD has been
designed with the necessary radius of curvature to minimize the overall distance of
the HDD under the river while maintaining necessary distance below the bottom of
the river. The design criteria and collocation of the drill next to the existing
transmission line corridor determines the location of the drill box. Moving the
ATWSJnrther back would change the engineering design, lengthen the HDD, and
also place the drill equipment closer to the residence on the west side of the river.
The need to avoid towers along the existing transmission line is another constraint.
13

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
For these reasons, it is not practical to relocate the ATWS to avoid wetland
wcmo022f
July 12, 2017
g. Figure A-4, Page 87 - Starlins Swamp, Mingo Swamp and Black River are crossed
at the confluence of these floodplain wetlands (wsao006f, wcmo0lls &
wco01If) impacting a total of 24.25 acres. Shifting the alignment north-
northwest would significantly reduce the amount of wetland area impacted by
avoiding Starlins Swamp and minimizing the impacts to Mingo Swamp and
Black River. This alignment should be adjusted or provide an explanation as to
why this is not practical in this location.
Response: The route in the area of Starlins Swamp, Mingo Swamp, and Black River
is based on avoidance of existing residential buildings and avoidance of impacts to a
turkey farming operation on the north side of the lowland crossing. By moving the
route as suggested the turkey farming operation would be impacted In addition, to
facilitate successful crossing of Interstate 95, the route needs to cross the swamp
complex, and by remaining where the route is, the crossing of Interstate 95 can occur
outside of the swamp complex and avoid additional impacts due to HDD operations.
16. Public Hearings - The Director has determined that it is in the public's interest that two
public hearings to review public comment and additional information be held prior to
taking final action on your application. The first hearing will be held on Tuesday, July
18,2017 starting at 6:00 p.m. at the Fayetteville Technical Community College
Cumberland Hall Auditorium at 2201 Hull Road, Fayetteville, NC. The second hearing
will be held on Thursday, July 20, 2017 starting at 6:00 p.m. at the Nash Community
College Brown Auditorium at 522 N. Old Carriage Road, Rocky Mount, NC. The
public comment periodwill remain open until 5:00 p.m. on August 19, 2017.
a. In accordance with 15ANCAC 02H.0503, a Public Notice and Notice of Public
Hearings was published in the following papers:
County
Paper
Date
Cost
Cumberland
The Fayetteville Observer
17 -Jun
$ 387.63
Halifax
The Daily Herald
18 -Jun
$ 175.63
Johnston
News & Observer
17 -Jun
$ 657.40
Nash
Rocky Mount Telegram
17 -Jun
$ 152.28
Northampton
Roanoke -Chowan News-
17 -Jan
$ 156.14
Robeson
The Robesonian
17 -Jun
$ 145.40
Sampson
Sampson Independent
18 -Jun
$ 278.98
Wilson
The Wilson Times
17 -Jun
$ 193.60
14

Atlantic Coast Pipeline
North Carolina Department of Environmental Quality
Response to Information Request for 401 Water Quality Certification
July 12, 2017
b. Also in accordance with 15ANCAC 02H.0503, a Public Notice and Notice of
Public Hearings was distributed to the Wetlands Mailing List. In addition, the
notice hasbeen posted on DEQ's website and sent to the wetlands email listserv.
c. A correction to the public notice to correct a typo in the pipe diameter was
issued on June 19to the email listsery and website, on June 20 to the Wetlands
Mailing List, and published in the newspapers listed above on June 21 and 22.
d. Submit $2,147.06 to pay for the costs of advertising the public notice as
requiredin Title 15A NCAC 02H.0503 (f).
Response: Atlantic appreciates the notice of public hearings and has provided the
requested check for $2,147.06, which will arrive as a separate submittal, anticipated
to arrive on July 12, 2017, directed to care of Ms. Karen Higgins.
Atlantic has provided responses by July 14, 2017, per NCDEQ's request for additional
information.
15

Appendix A
Blasting Plan - (Rev 3)

a n is
st
e
F i Iiii n e L,
ATLANTIC COAST PIPELINE, LLC
ATLANTIC COAST PIPELINE
Docket No.
and
CP15-554-000
CP15-554-001
DOMINION TRANSMISSION, INC
SUPPLY HEADER PROJECT
Docket No.
Blasting Plan
CP15-555-000
Updated, Rev. 3
November 1, 2016

Blasting Plan
TABLE OF CONTENTS
1.0
INTRODUCTION..............................................................................................................1
2.0
PURPOSE...........................................................................................................................1
3.0
GENERAL REQUIREMENTS........................................................................................1
4.0
PRE -BLASTING REQUIREMENTS..............................................................................2
5.0
SITE-SPECIFIC BLASTING PLANS.............................................................................2
6.0
MONITORING..................................................................................................................3
7.0
SAFETY..............................................................................................................................3
7.1 Protection of Aboveground and Underground Structures.......................................3
7.2 Protection of Personnel............................................................................................6
7.3 Lightning Hazard.....................................................................................................8
8.0
KARST................................................................................................................................8
9.0
STORAGE REQUIREMENTS........................................................................................9

Blasting Plan
LIST OF ACRONYMS AND ABBREVIATIONS
ACP
Atlantic Coast Pipeline
Atlantic
Atlantic Coast Pipeline, LLC
DTI
Dominion Transmission, Inc.
GPS
global positioning system
PPV
peak particle velocity
Project
Atlantic Coast Pipeline
SHP
Supply Header Project
ii

Blasting Plan
1.0 INTRODUCTION
Atlantic Coast Pipeline, LLC (Atlantic) — a company formed by four major energy
companies - Dominion Resources, Inc.; Duke Energy Corporation; Piedmont Natural Gas Co.,
Inc.; and AGL Resources, Inc. — proposes to construct and operate approximately 600 miles of
natural gas transmission pipelines and associated aboveground facilities in West Virginia,
Virginia, and North Carolina. This Project, referred to as the Atlantic Coast Pipeline (ACP), will
deliver up to 1.5 million dekatherms per day of natural gas from supply areas in the Appalachian
region to demand areas in Virginia and North Carolina. Atlantic has contracted with Dominion
Transmission, Inc. (DTI), a subsidiary of Dominion Resources, Inc., to construct and operate the
ACP on behalf of Atlantic.
In conjunction with the ACP, DTI proposes to construct and operate approximately
37.5 miles of pipeline loop and modify existing compression facilities in Pennsylvania and West
Virginia. This Project, referred to as the Supply Header Project (SHP), will enable DTI to
provide firm transportation service to various customers, including Atlantic.
2.0 PURPOSE
Based on an analysis of the Natural Resource Conservation Service's Soil Survey
Geographic Database, approximately 26 percent (155.8 miles) of the proposed ACP and SHP
pipeline routes will cross areas with bedrock at depths of less than 60 inches. More than half
(81.7 miles) of this bedrock are considered paralithic (soft) and may not require blasting during
construction. The remaining areas will cross soils with a lithic contact (hard bedrock) within
60 inches of the surface that may require blasting or other special construction techniques during
installation of the proposed pipelines.
This Blasting Plan outlines the procedures and safety measures that Atlantic's and DTI's
construction contractors (referred to as the Contractor below) will adhere to while conducting
blasting activities required for the construction of the ACP and SHP. Before blasting, a site-
specific Blasting Specification Plan, which is consistent with the provisions in this Blasting Plan,
will be submitted by the Contractor to Atlantic or DTI for approval. Approval of a site-specific
Blasting Specification Plan does not relieve the Contractor from responsibility or liability.
3.0 GENERAL REQUIREMENTS
Blasting for grade or trench excavation will be used where deemed necessary by the
Contractor, and approved by an Atlantic or DTI representative, after examination of the site. To
the extent practical on USFS lands, rock trenching will be accomplished using mechanical means
such as rippers, rock hammers, John Henry drills, etc.
Blasting operations will be conducted by or under the direct and constant supervision of
personnel legally licensed and certified to perform such activity in the jurisdiction where blasting
occurs. Prior to any blasting activities, the Contractor will provide Atlantic or DTI with
appropriate information documenting the experience, licenses, and permits associated with
blasting personnel.

Blasting Plan
Blasting -related operations will comply with applicable Federal, State/Commonwealth,
and local regulations, permit conditions, and the construction contract. These operations include:
obtaining, transporting, storing, handling, loading, detonating, and disposing of blasting material;
drilling; and ground -motion monitoring.
4.0 PRE -BLASTING REQUIREMENTS
Prior to the initiation of blasting operations, the Contractor will comply with the
following:
• The Contractor will obtain all required Federal, State/Commonwealth, and local
permits relating to the transportation, storage, handling, loading, and detonation of
explosives.
• The Contractor will be responsible for the protection of existing underground
facilities.
• Before performing any work on, or accessing the construction right-of-way, the
Contractor will verify with an Atlantic or DTI representative that all property
owners have been notified of the upcoming construction activities. The
Contractor will notify all such parties at least 48 hours prior to blasting.
• The Contractor will submit to Atlantic or DTI its site-specific Blasting
Specification Plan for approval prior to the execution of blasting activity.
5.0 SITE-SPECIFIC BLASTING PLANS
For each area determined to require blasting, a site-specific Blasting Specification Plan
will be prepared by the Contractor. This plan will include, at a minimum, the following
information:
• blaster's name, company, copy of license, and statement of qualifications;
• seismograph company, names, equipment and sensor location;
• site location (milepost and stationing), applicable alignment sheet numbers, and
associated rock type and geological structure (solid, layered, or fractured);
• copies of all required Federal, State/Commonwealth, and local permits;
• methods and materials, including explosive type, product name and size, weight
per unit, and density; stemming material; tamping method; blasting sequence; use
of non -electrical initiation systems for all blasting operations; and magazine type
and locations for storage of explosives and detonating caps;
• site dimensions, including explosive depth, distribution, and maximum charge and
weight per delay; and hole depth, diameter, pattern, and number of holes per
delay;
• Global positioning system (GPS) coordinates of blasting location(s), distance and
orientation to nearest aboveground and underground structures, and dates and
hours blasting will be conducted;
W

Blasting Plan
• blasting procedures for:
o storing, handling, transporting, loading, and firing explosives;
o prevention of misfires, fly -rock, fire prevention, noise, and stray current
accidental -detonation;
o signs, flagmen, and warning signals prior to each blast;
o locations where the pipeline route:
■ parallels or crosses an electrical transmission corridor, cable, or
pipeline;
■ parallels or crosses a highway or road;
■ approaches within 500 feet of a water well or within 150 feet of an
oil and gas well; or
■ approaches within 1,000 feet of any residence, building, or
occupied structure;
o local notification;
o inspections after each blast;
o disposal of waste blasting material; and
o blasting on steep slopes.
6.0 MONITORING
During blasting operations, the Contractor will be required to monitor operations in the
following manner:
• The Contractor will provide seismographic equipment to measure the peak
particle velocity (PPV) of all blasts in the vertical, horizontal, and longitudinal
directions.
• The Contractor will measure the PPV at any existing pipelines, domestic
structures, water supply wells, oil and gas wells, electrical transmission tower
footings, and other utilities within 150 feet of the blasting. If none of these
structures/facilities are present, the Contractor will measure the PPV at the edge
of the construction right-of-way.
• The Contractor will complete a Blasting Log Record immediately after each blast
and submit a copy to an Atlantic or DTI representative upon completion of
blasting activities at each blasting site.
7.0 SAFETY
7.1 Protection of Aboveground and Underground Structures
Where blasting is determined to be required, Atlantic and DTI will identify any municipal
water mains proposed for crossing, and will consult the local water authority. Reports of
3

Blasting Plan
identified crossings will include location by milepost, owner, and status and results of contacts
with the water authority.
The Contractor will exercise control to prevent damage to aboveground and underground
structures including pipelines, domestic structures, water supply wells, oil and gas wells,
electrical transmission tower footings, measures to minimize blasting impacts on steep slopes,
and other utilities. The Contractor will implement the following procedures:
• If blasting occurs within 500 feet of an identified water well, water flow
performance and water quality testing will be conducted before blasting. If the
water well is damaged, the well will be repaired or otherwise restored or the well
owner will be compensated for confirmed damages. Atlantic and DTI will
provide an alternative potable water supply to the landowner until repairs occur.
• If blasting occurs within 150 feet of any aboveground structures, the Contractor
and an Atlantic or DTI representative will inspect and photograph the structures
before blasting. In the event that blasting damage to the aboveground structure is
confirmed, the owner will be compensated.
• The Contractor will be responsible for the ultimate resolution of all damage
claims resulting from blasting. Such liability is not restricted by the 150 -foot
inspection requirement cited above.
• Blasting will not be allowed within 15 feet of an existing pipeline, unless
specifically authorized by an Atlantic or DTI representative.
• Holes that have contained explosive material will not be re -drilled. Holes will not
be drilled where danger exists of intersecting another hole containing explosive
material.
• Blasting mats or padding will be used on all shots where necessary to prevent
scattering of loose rock onto adjacent property and to prevent damage to nearby
structures and overhead utilities.
• Blasting will not begin until occupants of nearby buildings, stores, residences,
places of business, places of public gathering, and farmers have been notified by
the Contractor in advance to protect personnel, property, and livestock. The
Contractor will notify all such parties at least 48 hours prior to blasting.
• Blasting in or near environmentally sensitive areas, such as streams and wildlife
areas, may include additional restrictions. When blasting in streams, the
following additional measures may be implemented, in consultation with the
appropriate agencies, to avoid or minimize impacts on fisheries, aquatic
resources, and habitats:
o Prior to the initiation of the designed blast and following audible warning
signals, a single cap will be initiated in the stream to alert fish to move
away from blasting area.
o Removing fish from blasting area and relocating them downstream, this
will only be used in smaller streams.
M

Blasting Plan
o In larger streams a boat can be used both up and down stream to alert fish
to move away from blasting area. This tactic can be used only if the
operators of the boat can retreat a safe distance from the blast zone as
determined by the Blaster in Charge.
When blasting on steep slopes the following measures will be taken to minimize
blasting impacts.
o A safety berm may be created at the base of each shot to minimize the shot
material movement down the slope after initiation if practical.
o A catch berm may be created at the base of the hill to stop material from
leaving the right -of way, if practical.
o Berms may be constructed on the right-of-way to direct any rolling
material away for the offside boundaries.
o Shots will be initiated from the lowest elevation of the trench.
o The blaster will conduct test blasts on areas without slope with a reduction
of powder factor that will fracture the material while keeping it in place.
Tight digging and higher vibrations may be associated with this
adjustment.
o Decking the holes may be considered to lower the pounds per delay.
o Where multiple trench shots are to be initiated, the shot material will stay
in place and remain muck bound. This will hold the following shots in
place.
All blasting will be subject to the following limitations:
o Maximum PPV of 12.0 inches per second, or the maximum PPV in
accordance with State/Commonwealth or local regulations, in any of three
mutually perpendicular axes measured at the lesser distance of the nearest
facility or the edge of the permanent easement.
o Maximum drill size will be 2.5 inches unless otherwise approved by an
Atlantic or DTI representative.
o Maximum quantity of explosive per delay will be governed by the
recorded measurements as influenced by the test blast program or a scaled
distance formula.
o Explosive agents and ignition methods will be approved by an Atlantic or
DTI representative. Ammonium nitrate/fuel oil and other free flowing
explosives and blasting agents are not acceptable and will not be used.
o Drill holes will not be left loaded overnight.
o Approved stemming material will be used in all holes.
The drilling pattern will be set in a manner to achieve smaller rock fragmentation
(maximum 1 foot in diameter) to use as much as possible of the blasted rock as
backfill material after the pipe has been padded in accordance with the

Blasting Plan
specifications. The Contractor will submit the proposed drilling pattern to an
Atlantic or DTI representative for approval.
Under pipeline crossings and all other areas where drilling and blasting is required
within 15 feet of existing facilities:
o Drill holes will be reduced to a maximum of 2 inches or less in diameter.
o The number of holes shot at one time will be limited to three unless
otherwise approved by an Atlantic or DTI representative.
o Appropriate delay between charges will be used to attain desired
fragmentation.
7.2 Protection of Personnel
The Contractor will include in its procedures all Federal, State/Commonwealth, and local
safety requirements for blasting. The Contractor's procedures will address, at a minimum, the
following requirements:
• Blasting will be performed during daylight hours only.
• Only authorized, qualified, and experienced personnel will handle explosives.
• No explosive materials will be located where they may be exposed to flame,
excessive heat, sparks, or impact. Smoking, firearms, matches, open flames, and
heat- and spark -producing devices will be prohibited in or near explosive
magazines or while explosives are being handled, transported, or used.
• A code of blasting signals will be established, posted in conspicuous places, and
utilized during blasting operations. Employee training will be conducted on the
use and implementation of the code.
• The Contractor will use every reasonable precaution including, but not limited to,
visual and audible warning signals, warning signs, flag persons, and barricades to
ensure personnel safety.
• Warning signs, with lettering a minimum of 4 inches in height on a contrasting
background, will be erected and maintained at all approaches to the blast area.
• Flaggers will be stationed on all roadways passing within 1,000 feet of the blast
area to stop all traffic during blasting operations.
• Both workers involved in the detonation and personnel not involved in the
detonation will stand back at a distances determined by the person in charge from
the time the blast signal is given until the "ALL CLEAR" is sounded.
• No loaded holes will be left unattended or unprotected. No explosives or blasting
agent will be abandoned.
• In the case of a misfire, the blaster will provide proper safeguards for personnel
until the misfire has been re -blasted or safely removed.
M

Blasting Plan
The exposed areas of the blast will be matted wherever practicable. In cases
where such a procedure is not deemed to be feasible, the Contractor will submit
an alternative procedure for review by an Atlantic or DTI representative and the
site in question will be visited and examined by the consultant before any
approval is granted.
Atlantic and DTI may employ two-way radios for communication between
vehicles and office facilities. The Contractor will advise Atlantic or DTI and
other pipeline contractors of any need to cease use of such equipment during
blasting activities.
All loading and blasting activity will cease and personnel in and around the blast
area will retreat to a position of safety during the approach and progress of an
electrical storm irrespective of the type of explosives or initiation system used.
This is a major safety precaution and will always be observed. All explosive
materials, all electrical initiation systems, and all non -electric initiation systems
are susceptible to premature initiation by lightning.
Previous blast areas must be inspected to verify the absence of misfires. No
drilling may commence until such inspection occurs. If a misfire occurs adjacent
to a hole to be drilled, the misfire will be cleared by the blaster using reasonable
techniques required for the situation prior to commencement of drilling. If a
misfire occurs at some distance from the drilling area, drilling may be stopped
while clearing preparations are underway. When the misfire is to be cleared by
re -shooting, drilling will be shut down and personnel evacuated to a place of
safety prior to detonation.
All transportation of explosives will be in accordance with applicable Federal,
State/Commonwealth, and local laws and regulations. Vehicles used to transport
explosives will be in good working condition and equipped with tight wooden or
non -sparking metal floor and sides. If explosives are carried in an open -bodied
truck, they will be covered with a waterproof and flame -resistant tarp. Wiring
will be fully insulated to prevent short-circuiting and at least two fire
extinguishers will be carried. The vehicle will be plainly marked to identify its
cargo so that the public may be adequately warned. Metal, flammable, or
corrosive substances will not be transported in the same vehicle with explosives.
There will be no smoking, and unauthorized or unnecessary personnel will not be
allowed in the vehicle. Competent, qualified personnel will load and unload
explosives into or from the vehicle.
No sparking metal tools will be used to open kegs or wooden cases of explosives.
Metallic slitters will be used to open fiberboard cases, provided the metallic slitter
does not come in contact with the metallic fasteners of the case. There will be no
smoking, no matches, no open lights, or other fire or flame nearby while handling
or using explosives. Explosives will not be placed where they are subject to
flame, excessive heat, sparks, or impact. Partial cases or packages of explosives
will be re -closed after use. No explosives will be carried in the pockets or
clothing of personnel. The wires of an electric blasting cap will not be tampered
with in any way. Wires will not be uncoiled. The use of electric blasting caps
7

Blasting Plan
will not be permitted during dust storms or near any other source of large charges
of static electricity. Uncoiling of the wires or use of electric caps will not be
permitted near radio-frequency transmitters. The firing circuit will be completely
insulated from the ground or other conductors.
No blast will be fired without a positive signal from the person in charge. This
person will have made certain that all surplus explosives are in a safe place; all
persons, vehicles, and/or boats are at a safe distance; and adequate warning has
been given. Adequate warning of a blast will consist of, but not be limited to, the
following:
o notifying nearby homeowners and local agencies, if necessary;
o stopping vehicular and/or pedestrian traffic near the blast site; and
o signaling with an air horn, whistle, or similar device using standard
warning signals.
Only authorized and necessary personnel will be present where explosives are
being handled or used.
The condition of the hole will be checked with a wooden tamping pole prior to
loading. Surplus explosives will not be stacked near working areas during
loading. Detonating fans will be cut from spool before loading the balance of
charge into the hole. No explosives will be forced into a bore hole past an
obstruction. Loading will be done by a blaster holding a valid license or by
personnel under his direct supervision.
Fly -rock leaving the right-of-way will be collected immediately and disposed of
at disposal sites approved by Atlantic or DTI. This work will not be left to the
cleanup crew.
7.3 Lightning Hazard
A risk of accidental detonation caused by lightning strikes exists at any time the
workplace is experiencing an electrical storm and there are loaded holes on site. If this hazard is
judged to exist by an Atlantic or DTI representative, work will discontinue at all operations and
workers will be moved to secure positions away from the loaded holes. Furthermore, workers
will not return to the work site until the storm has passed and an Atlantic or DTI representative
has indicated it is clear to return.
The Contractor will have on site an approved lightning instrument capable of measuring
the degree of electrical activity as a storm approaches, and the distance to the storm front from
the instrument on the right-of-way.
8.0 KARST
In accordance with Atlantic's and DTI's Karst Monitoring and Mitigation Plan, and in
addition to the measures described above, the following procedures will be implemented in areas
of karst terrain:

Blasting Plan
• Blasting will be conducted in a manner that will not compromise the structural
integrity or alter the karst hydrology of known or presumed habitat for federally
listed threatened and endangered species in the subterranean karst environment
(e.g. Madison cave isopod).
• Excavations will be inspected for voids, openings or other tell-tale signs of
solution (karst) activity.
• If rock removal intercepts an open void, channel, or cave, construction activities
will cease in the vicinity of the void, channel, or cave until a remedial assessment
is performed by a qualified geologist or engineer with experience in karst terrain.
• Use of explosives will be limited to low -force charges designed to transfer the
explosive force only to the rock which is designated for removal (e.g., maximum
charge of 2 inches per second ground acceleration).
• If the track drill used to prepare drill holes for explosive charges encounters a
subsurface void larger than 6 inches within the first 10 feet of bedrock, or a group
of voids totaling more than 6 inches within the first 10 feet of bedrock, then
explosives will not be used until a subsurface exploration is conducted to
determine if the voids have connectivity to a deeper karst structure. The
subsurface exploration will be carried out with track drill probes, coring drill,
electrical resistivity, or other techniques capable of resolving open voids in the
underlying bedrock. If a track drill or coring rig is used, then all open holes will
be grouted shut after the completion of the investigation.
9.0 STORAGE REQUIREMENTS
All explosives, blasting agents, and initiation devices will be stored in locked magazines
that have been located, constructed, approved, and licensed in accordance with Federal,
State/Commonwealth, and local regulations. Magazines will be dry, well ventilated, reasonably
cool (painting of the exterior with a reflective color), bullet and fire resistant, and kept clean and
in good condition.
Initiation devices will not be stored in the same box, container, or magazine with other
explosives. Explosives, blasting agents, or initiation devices will not be stored in wet or damp
areas; near oil, gasoline, or cleaning solvents; or near sources of heat radiators, steam pipes,
stoves, etc. No metal or metal tools will be stored in the magazine. There will be no smoking,
matches, open lights, or other fire or flame inside or within 50 feet of storage magazines or
explosive materials.
Magazines will be constructed and located in accordance with Federal, State/
Commonwealth, and local regulations. Magazines will be marked in minimum 3 -inch -high
letters with the words "DANGER — EXPLOSIVES" prominently displayed on all sides and roof,
and be kept locked at all times unless explosives are being delivered or removed by authorized
personnel. Admittance will be restricted to the magazine keeper, blasting supervisor, or licensed
blaster.
I

Blasting Plan
Accurate and current records will be kept of the explosive material inventory to ensure
that oldest stocks are utilized first, satisfy regulatory requirements, and for immediate
notification of any loss or theft. Magazine records will reflect the quantity of explosions
removed, the amount returned, and the net quantity used at the blasting site.
When explosive materials are taken from the storage magazine, they will be kept in the
original containers until used. Small quantities of explosive materials may be placed in day
boxes, powder chests, or detonator boxes. Any explosive material not used at the blast site will
be returned to the storage magazine and replaced in the original container as soon as possible.
10

Appendix A
Revised Wetland and Waterbody Crossing Table for North
Carolina
(Application Appendix C-1)

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