SW6200704_Response to Comments_20210209

Larry King & Associates.. R.L,,,S.,, P.A.
P.O. 53787 NC Firm
1333 Morganton Road, Suite 201 License
Fayetteville, North Carolina 0i i
www.LKandA.com
February 9, 2021
Jim Farkas
Environmental Engineer
Stormwater Program
NC Department of Environmental Quality
512 North Salisbury Street
Raleigh, NC 27699-1612
Subject: Response to Request for Additional Information
Stormwater Permit No. SW6200704
Cypress Pointe
Cumberland County
Mr. Farkas:
We have received your request for information and have attempted to address each. Please see
remarks/comments below to explain how each was addressed. Remarks/comments correspond to the
review comment numbers:
1. Drainage Area 1 erroneously included offsite runoff areas as a part of the basin design. A storm
pipe has been provided at the location of the offsite drainage area to allow for future
connection and bypass of the proposed Cypress Pointe stormwater management system.
2. Sheet C-01 has been included in this submittal.
3. Spreadsheet has been updated to correct formula. Basin-2 was resized to accommodate new
minimum surface area.
4. Total BUA has been updated to include entrance road areas.
5. Two copies are included.
6. Supplement-EZ form:
a. Drainage Areas Page:
i. This was a problem with the printing. DA 2 is shown on current submittal.
ii. Updated.
iii. Values updated.
b. Infiltration System Page:
i. Value have been updated for consistency.
ii. Item incorrectly labelled and has been updated,

iii. More conservative boring information has been used in current submittal.
iv. Understood, misunderstood this to refer to the soils report that was provided.
v. Use of more conservative infiltration rates was intentional. However, to
accommodate the spreadsheet correction in comment 3, infil rates have been
revised.
vi. Rounded values have been added to Line 46 as requested.
vii. Rounded values have been added to Line 46 as requested.
The drawings have been revised to update noted changes to drainage area designations. Revised sheets
C-01, C-03A, C-03C, C-03D, C-23 and C-24 have been included with submittal. Sheet C-23 was revised
simply to update the storm elevations in the basin profiles that changed as the result of using a different
Infiltration rate.
Sheet C-24 reflects the changes in shape needed to meet the revised minimum surface area
requirement.
Please let me know if you have any questions.
Sincerel ,
Jeffrey Nobles, PE