SW4231001_Response To Comments_20240111

Allied Design, Inc.
CIVIL ENGINEERING❖ LAND SURVEYING
Firm License No.: C-1891
January 10, 2024
Mr. Jim Farkas
North Carolina Department of Environmental Quality
Division of Energy, Mineral and Land Resources -
Stormwater Program
512 North Salisbury Street, Office 640M
Raleigh,NC 27604
[phone]
VIA: FedEx Delivery
SUBJECT: NCDEQ STORMWATER MANAGEMENT PERMIT APPLICATION
STORMWATER PERMIT NO. SW4231001 RE-SUBMITTAL
WORD OF LIFE
ADI PROJECT NO.: 23-032
To Whom It May Concern:
On behalf of Mr. Bruce Henry, Sr., and, from comments received after the administrative
completeness review, enclosed is the revised information for review and approval of the
stormwater management permit for the subject project.
We are enclosing the following:
1. Two complete sets of the stormwater construction drawings, Sheets SWM1 through
SWM5 (folded to 8.5"x 14"), as issued, "Revised per NCDEQ SWM Comments" dated,
January 10, 2024;
2. One (1) copy of the revised Pages 2 and 3 of the Stormwater Management Permit
Application Form;
3. One (1) copy of the revised"Stormwater Narrative and Calculations";
4. One (1) copy of the revised Supplement-EZ Form.
5.
The following is a brief discussion of each of the items listed for disapproval in your letter from
January 10, 2024:
1. SCM MDCs:
a. Stormwater outlet stabilization calculations are now provided on sheets SWM3
and SWM5, as well as appendix H of the Stormwater Narrative and Calculations.
b. Sheet SWM5 is now revised to show the correct percentage ranges for the
bioretention media.
c. Cleanouts are now clearly labeled on the plan view of sheet SWM5.

Allied Design, Inc.
CIVIL ENGINEERING❖ LAND SURVEYING
Firm License No.: C-1891
d. The invert of the IWS has been moved to the recommended elevation (Elev.
914.50; 18 inches below the planning surface).
2. Mr. Henry's phone number and email are now provided in section III of the application.
3. Supplement-EZ Form
a. Cover Page
i. Vegetated setback width has now been provided in accordance with 15A
NCAC 02H.1017(10).
b. Drainage Area Page
i. Entire Site
1. The column updated to reflect the entire site information. There is
an impervious area of 1,060 sf in line 12 (Roadway). This reflects
the area that will not be treated in the bio cell and is not included in
the drainage area 1 impervious area calculations. BUA calculations
have been updated to include this area; hence changing the site
BUA percentage to 27.86. This has been updated on SWM2 and
page 3 of the Stormwater Management Permit Application Form.
2. The project area has been provided in lines 5 and 6.
3. Lines 4 and 19-21 have been revised to "N/A".
ii. Bioretention Cell Column
1. Line 18 has been updated to 27.86% (shown as 28%).
2. Design volume of storage revised to 3,913 cf to match volume
shown in Hydrographs Pond Report(Narrative Appendix G)
c. Bioretention Cell Page
i. Design Volume of storage revised to 3,913 cf to match volume shown in
Hydrographs Pond Report (Narrative Appendix G)
ii. Line 24 now reflects the peak attenuation depth of the 10-yr storm, which
has a max elevation of 917.09. The 10-yr, 6-hr hydrographs have been
added to appendix E of the narrative.
iii. Since the proposed bioretention cell does have an underdrain system, line
26 has been revised to state "N/A".
iv. Line 32 has been revised to state 30 in as the media depth.
v. Lines 33-35 have been revised to reflect the correct media percentages
based on the ranges shown in 15A NCAC 02H.1052(6).
Please review the enclosed information and notify our office of approval or if you require any
revisions/modifications. Should you have any questions, please contact us at(336) 765-2377.
Sincerely,
Steve M. Causey, PE