SW6221001_Response To Comments_20230622

June 22, 2023

Mr. Jim Farkas
Division of Energy Mineral and Land Resources
North Carolina Department of Environmental Quality
1612 Mail Service Center
512 North Salisbury Street, Office 640E
Raleigh, NC 27699-1612

Re: SW6221001 Macridge & Chicken Road Intersection Improvements

Dear Mr. Farkas:
Enclosed is information pertaining to our application for the state Stormwater Management Permit
Application for the above referenced project. In addition to this letter addressing comments,
included as a part of this submittal are the following:
Two folded full-size sets (22x34) of the revised sheets (PP-05 and SCM-01) to the project
plans, 95% Design for Regulatory Review, dated 6/20/2023.
One revised Bioretention Cell Page of the Supplement-EZ Form.
Additionally, as outlined below, we provide responses to your review comments sent to us via email
on June 15, 2023:
Please correct the following:
Bioretention cells that have an underdrain are required to have internal water storage
(Please refer to Part C-2 of the Manual, specifically, the second paragraph on page 6). Please
either remove the underdrain or reconfigure the design to meet the MDCs.
Response: For SCM-01 the underdrain system and stone drainage layer have been
removed. SCM-02 has 30-inches of media and separation between the SHWT, therefore
the IWS remains.
Please update the Bioretention Cell Page of the Supplement-EZ Form to reflect the proposed
design of the SCM. This item was not updated despite changes to the proposed design of the
SCM (For example, if the IWS is being removed and the bottom of the SCM is being raised,
this should be reflected in the form).
Response: The Supplement-EZ has been updated to reflect the changes to SCM-01.

All documents listed herein have also been uploaded to the State Stormwater portal at
https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload as requested (the electronic documents
prefixed with a date of “20230622-“).

Should you require any additional information, please do not hesitate to contact us immediately.

Sincerely,
GRADIENT, PLLC

C. Heath Wadsworth, PE