20140957 Ver 2_Clarification Email_20171208

Burdette, Jennifer a
From:
Spencer Trichell <[e-mail]>
Sent:
Friday, December 08, 2017 12:45 PM
To:
Burdette, Jennifer a
Cc:
Richard B Gangle
Subject:
[External] RE: ACP
CAUTION: External email. Do not click links or open attachments unless verified. Send all suspicious email as an attachment to
report. [e-mail].
Jennifer, our responses to your questions are in red below.
Thanks,
Spencer
From: Burdette, Jennifer a [mailto:[e-mail]]
Sent: Tuesday, December 05, 2017 4:35 PM
To: Spencer Trichell (Services - 6)
Cc: Richard B Gangle (Services - 6)
Subject: [External] ACP
Spencer,
Thank you for the updated mitigation reservation letter submitted on November 29, 2017. As we discussed via
telephone today, I have a few questions or clarifications after reviewing the S&EC plans.
I understand that you do not plan to submit revised S&EC plans to the Raleigh Regional Office DEMLR
staff until a decision is reached on the 401/Buffer Authorization application. I understand that the
Fayetteville Regional Office DEMLR staff have approved ACP's revised S&EC plans. Please upload the
final plans for Fayetteville here. Atlantic plans to submit a response to the Raleigh RO on or before
12/22/2017. Plans approved by Fayetteville RO are being uploaded to this link today (12/8/17). The
files are large and may take some time to completely upload.
2. Your July 12, 2017 response to the Division's request for additional information regarding the alignment
crossing three streams just above their confluence indicated that ACP would seek authorization from
FERC to shift the route alignment to avoid two stream crossings. The S&EC plans submitted on October
20, 2017 show the original alignment crossing three streams. Please explain ACP's effort to minimize
this impact. This stream crossing is located in a spread that is planned for 2019 construction; therefore
this change will be coordinated in 2018. FERC has a process whereby variances can be requested after
issuance of the Order; however certain environmental conditions must also be met including obtaining
all environmental permits and clearances. Atlantic will seek the necessary authorizations from
applicable agencies (NCWRC, NCDEQ, USACE, USFWS, NCDHR, etc.) prior to, or concurrent with,
submitting a variance request to FERC. Once the variance is approved by FERC, Atlantic will incorporate
the change into the project.

3. Is any curb and gutter with stormwater piping conveyances proposed for the Northampton Compressor
Station or three proposed M&R stations? If yes, please provide calculations to document that the
project will not cause degradation of downstream surface waters. Documentation shall include a
detailed analysis of the hydrological impacts from stormwater runoff when considering the volume and
velocity of stormwater runoff from the project built upon area and the size and existing condition of the
receiving stream(s). No curb and gutter stormwater conveyance system is proposed at the
Northampton CS or the 3 M&Rs.
4. The Neuse and Tar -Pamlico Riparian Buffer Rules require diffuse flow of runoff be maintained in the
riparian buffer by dispersing concentrated flow and reestablishing vegetation. New conveyances of
stormwater are only allowable if they control pollutants and attenuate flow. New stormwater
discharges to an existing conveyance are exempt if no modifications are made to increase its capacity
and it is managed to minimize pollutants to surface waters.
a. Access Roads— Please explain how diffuse will be maintained in these protected river basins
when minor and major upgrades are made to existing access roads and for proposed new access
roads. You may refer to this clarification memo regarding options for meeting diffuse
flow. Atlantic is not building new access roads or creating any new drainage swales, ditches,
etc. Atlantic will use existing drainage ditches, swales, etc and will manage them to minimize
sedimentation, nutrients, and other pollution that flow towards waterbodies.
a. Smithfield M&R Station — Please explain how diffuse flow will be maintained at this M&R station
within the Neuse River Basin. The site does not have, nor propose, any new drainage
channels. Atlantic will use existing drainage ditches, swales, etc. and will manage them to
minimize sediment, nutrients, and other pollution that flow towards waterbodies.
An email response to these additional questions will be fine.
Thanks,
Jennifer
Jennifer Burdette
401/Buffer Coordinator
Division of Water Resources - 401 & Buffer Permitting Branch
Department of Environmental Quality
919 807 6364 office
jennifer.burdette(cDncdenr.aov
1617 Mail Service Center
Raleigh, NC 27699-1617
(Physical Address: 512 N. Salisbury St, Raleigh, NC 27604 - 9t" Flr Archdale Bldg — Room 942F)
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and
or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds
the sender without an additional express written confirmation to that effect. The information is intended solely for the
individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any
disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have

received this electronic transmission in error, please reply immediately to the sender that you have received the message
in error, and delete it. Thank you.