SW6210908_Response To Comments_20211124

TIMMONS GROUP
Date:
2021-11-24
Project:
DEPCOM Bay Tree Solar
Stormwater Permit No. SW6210908
Timmons Group Project #45488.006
Subject:
Response to Stormwater Permit No.
Project Contact:
Jacob Dooley
Phone:
919.866-4937
Email:
Jacob. [e-mail]
5410 Trinity Road P 919.866.4951
Suite 102 F 919.859.5663
Raleigh, NC 27607 www.timmons.com
SW6210908 Additional Information
Response to review comments have been added below each comment in bold font.
NCDEQ - Jim Farkas
Please clarify the relationship between the Applicant, Bay Tree Solar, LLC, and the project
(Section III, 1c of the Application). The plans indicate that the developer is Cypress Creek
Renewables.
Response: Relationship has been clarified via email, let me know if this will suffice.
2. Per the provided USGS topographic map, there appears to be surface water located within the
project area, please do the following:
a. Please include the on -site surface water area in Section IV, 6 of the Application.
This information should also be included on Line 4 of the Cover Page of the
Supplement-EZ Form.
Response: After conducting further analysis of our area we are studying and
there are no surface waters within out project area. There are surveyed
wetlands which we have now added to section IV, 5 of the application. This
has also been added to line 3 of the cover page
b. Please recalculate the total project area as shown in Section IV, 7 of the
Application. This information should also be updated on Line 2 of the Cover Page
of the Supplement-EZ Form, on Lines 5 & 6 of the Drainage Areas Page of the
Supplement-EZ Form, and in the table in Section IV, 10 of the Application.
Response: Total project area has been recalculated based on the wetland
areas noted in Section IV, 5. This has now also been updated on line 2 of the
cover page, lines 5&6 of the drainage areas page, and the table in Section IV,
10 of the application.
C. Please recalculate the project percent impervious area as shown in Section IV, 8.
This information should also be updated on Line 18 of the Drainage Areas Page of
the Supplement-EZ Form and in the table in Section IV, 10 of the Application.
Response: Project percent impervious has been updated in Section IV, 8, line
18 of the drainage areas page, and the table in Section IV, 10 of the
application.
ENGINEERING I DESIGN I TECHNOLOGY

TIMMONS GROUP
5410 Trinity Road P 919.866.4951
Suite 102 F 919.859.5663
Raleigh, NC 27607 www.timmons.com
3. Please provide the original, signed, and notarized hard copies of the signature pages of the
Application (Section VI, 1). The provided photocopies will not suffice. It is noted that Harrison
Cole's signature on one of the Applications is an original signature, however, all of the
signatures in one copy of the Application must be original.
Response: Original, signed, and notarized hard copies of the signature pages have been
provided for Patsy Barnhill, Rita Kay Mckell, and Dean Thomas. They have
been uploaded to the portal, however the physical copies will arrive under
another letterhead from Harrison Cole.
4. Please provide calculations for the BUA summation for this project (Section VI, 7). While the
panels of the solar arrays may be considered as pervious (in accordance with Part E-6 of the
Stormwater Design Manual), the supports, foundations, and any other related BUA are not.
Please ensure that the calculations show that these associated BUAs are being included in the
BUA calculations.
Response: We have updated the BUA summation in Section VI,7 to separate the
impervious areas now individually for the Substation, Inverter Pads, Roads,
and Supports.
5. Please clearly dimension the project area in the main set of plans with bearings and distances
(Section VI, 8i of the Application).
Response: We have added sheets C1.01 and C1.02 to the plan set noting boundary
bearings and distances of the property. We have also included a red hatch
shown on plan sheets noting the "State Stormwater Permitting Authority
Region" for the area of which this permit is applicable for since our project
is only partially within this area.
6. Please clearly identify and dimension all BUA in the main set of plans (Section VI, 8j). It is noted
that certain BUA (such as the inverter pads) is clearly dimensioned, however, other BUA (such
as the access roads and substation) do not appear to have enough information to verify the BUA
amounts. You may wish to add dimensioning to these areas, callouts indicating the square
footage of these areas, or a BUA table (similar to the one in Section IV, 10 of the Application) to
the plans. NOTE: Gravel areas that are subject to infrequent vehicular traffic (approximately
twice a month or less) can be considered to not meet the definition of BUA per Part A-4 of the
Stormwater Design Manual (https:Hdeg.nc.gov/about/divisions/energy-mineral-and-land-
resources/stormwater/stormwater-programs/stormwater-design).
Response: BUA dimensions and callouts have been added to sheets C4.11-C4.13. The
red hatch is also shown on these sheets indicating the project area within
the State Stormwater Permitting Authority Region.
106 Wakefield
SUB-0052-2021, Timmons Group Project #48600.001
Response to Second City of Raleigh Review Comments
Page 2 of 4

TIMMONS GROUP
5410 Trinity Road P 919.866.4951
Suite 102 F 919.859.5663
Raleigh, NC 27607 www.timmons.com
7. Please provide official documentation indicating that Harrison Cole has signatory authority for
the Applicant, Bay Tree Solar, LLC and that Patsy Barnhill has signatory authority for one of the
Property Owners, Blueberry Bay, LLC (Section VI, 11).
Response: Documentation has been provided that Harrison Cole has signatory authority
for Bay Tree Solar, LLC and that Patsy Barnhill has signatory authority for
the property owner Blueberry Bay, LLC.
8. If you would like the solar panel surface areas to be considered pervious, you must demonstrate
compliance with recommendations 1-6 in Part E-6 of the Stormwater Design Manual. You
should discuss each of these items in the project narrative:
a. Recommendations 1, 3, & 4 — Please place a note in the plans and/or add special
O&M Agreement conditions/requirements (see attached example from a different
solar farm project) to avoid the compaction of the subsoils, to avoid the
concentration of stormwater runoff, and to minimize the use of herbicides and
fertilizers. These custom O&M Agreement items can be added into the O&M
Agreement Form using the "User Defined SCM".
Response: Notes 8,9, and 10 have been added to the cover sheet.
b. Recommendations 2 & 6 — Please provide a detail for the solar panels showing that
a sufficient disconnection length is being maintained between the rows of panels
and that the vertical clearance of the panels is less than or equal to 10 feet. Please
also provide a slope map for the panel area so that the ground slope can be
determined.
Response: A detail of the solar panels indicating sufficient disconnection
length is now shown on sheet C2.04
C. Recommendation 5 — This item appears to be addressed in the permanent seeding
schedule.
Response: Noted.
9. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, 1 hardcopy of other
documents, and a response to comments letter briefly describing how the comments have been
addressed.
a. Pdfs must be uploaded using the form at:
httips://edocs.deg.nc.gov/Forms/SW-Suipiplementa1-Uipload
b. Hard copies must be mailed or delivered to the following address:
i. For FedEx/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640E
Raleigh, NC 27604
ii. For USPS:
Jim Farkas
1612 Mail Service Center
Raleigh, NC 27699-1612
106 Wakefield
SUB-0052-2021, Timmons Group Project #48600.001
Response to Second City of Raleigh Review Comments
Page 3 of 4

5410 Trinity Road P 919.866.4951
T I M M O N S GROUP Raleigh,
te 02 F Awtim919.859.5663.c
Raleigh, NC 27607 wuwvtimmons.com
Response: Pdfs of revisions have been uploaded to the link below. 2 Hard Copies of the
revised plan sheets, 1 hardcopy of other documents, and a comment
response letter have been mailed to the address provided.
106 Wakefield
SUB-0052-2021, Timmons Group Project #48600.001
Response to Second City of Raleigh Review Comments
Page 4 of 4