SW3201002_400 - Response to Comment Letter_20210106

�� MCADAMS
January 6, 2021
North Carolina Department of Environmental Quality
RESPONSE TO COMMENTS > CPR-20000
Division of Energy, Mineral & Land Resources Stormwater Program
512 N. Salisbury Street
1612 Mail Service Center
Raleigh, NC 27699-1612
RE: 7-Eleven Long Ferry
Response to 1st Plan Review Comments
CPR-20000
The following are the response comments for the above -mentioned project. Our response comments are in bold.
STORMWATER PROGRAM:
Corey Anen
919. 707. 3649
1. The existing gravel areas on site should not be considered existing BUA. Gravel areas that do not receive
significant vehicular traffic and are not compacted by the weight of vehicles are exempt from the definition
of built -upon area [NCGS 143-214.7(b2)].
McAdams Response: Gravel was removed from the existing impervious takeoff and the SCM designed
adjusted as required based on the additional area required to be treated.
2. Based on the grading of Long Ferry Road, there will be runoff from off -site built -upon area draining onto the
site. This must be delineated and included in the total BUA.
McAdams Response: Area delineated and included in calculations
3. Please revise Page 1 of the SWU-101 application to specify the county in which the project is located.
McAdams Response: Provided
4. Please complete the "Entire Site" column on Page 2 of the Supplement EZ spreadsheet.
McAdams Response: Completed
5. Please explain why multiple property owners are listed in the application. The deed, as well as Rowan
County GIS, list only James E. Epting as the sole property owner.
McAdams Response: Revised to only list James E. Epting
creating experiences through experience 3430 Toringdon Way, Suite 110, Charlotte, NC 28277 / 704. 527. 0800

�� MCADAMS RESPONSE TO COMMENTS > CPR-20000
6. Please show a maintenance access and easement on the plans that conforms to General MDC 8 and 9 [15A
NCAC 02H .1050(8) & (9)].
McAdams Response: Easement provided.
7. Please submit a geotechnical investigation verifying that the separation from the bottom of the sand filter
to the seasonal high water table is greater than or equal to 2 feet [15A NCAC 02H .1056(1)].
McAdams Response: Geotech report provided. GW +/-15' below existing grade.
8. The Grading and Drainage Plan (Sheet C3.00) shows the trench drains on the south and east side of the
project to drain to CB-102 and JB-108, respectively. Please label these and any other drainage features on
the plan.
McAdams Response: Storm network labeled.
9. The permanent seeding plan on Sheet C 9.00 specifies tall fescue for the slopes of the basin and top of the
berm, but the detail on the same sheet shows Bermudagrass on the
slopes. Please correct this discrepancy.
McAdams Response: Revised
10. The water quality volume was calculated using the wrong built -upon area percentage (70.1% vs. 77.65% as
delineated).
McAdams Response: Revised
11. The calculations show the water quality depth as 0.94', but the detail on Sheet C9.01 shows it as 0.66'.
Please correct this discrepancy.
McAdams Response: Revised
12. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and 1 hardcopy of other documents. Pdfs
must be uploaded using the form at: https://edocs.deg.nc.gov/Forms/SW Project Submittal
McAdams Response: Noted
Consideration of this response is greatly appreciated. If you should have any questions or require additional
information, please do not hesitate to contact me at 704. 527. 0800.
Sincerely,
MCADAMS
creating experiences through experience 2 of 3

�� MCADAMS
Jonathan Woodard, PE
Assistant Project Manager, Engineering Services
RESPONSE TO COMMENTS > CPR-20000
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