SW5200201_Response to Comments_20200413

Shipman Engineering, PLLC Shipman Engineering, PLLC Shipman Engineering, PLLC Shipman Engineering, PLLC

Shipman Engineering, PLLC 919.900.0006
137 Middlegreen Place [e-mail]
Holly Springs, NC 27540 NCBELS License P-1963

April 7, 2020

Mr. Jim Farkas
NCDEQ Division of Energy, Mineral, and Land Resources
512 North Salisbury Street
Raleigh, NC 27699

Re: Stormwater Permit SW5200201-Lee Street Athletic Complex Improvements
Response to Comments

Dear Mr. Farkas,

We are in receipt of your comments dated March 16 for the subject project. We have made various modification
and revisions to the plans based on your comments. A summary of each comment, along with our response, is
indicated as follows:
1. As designed, the project does not meet the definition of low density (Section II, 2). One of the tenets of
low density is the use of piped conveyances only when unavoidable. It appears that proposed Yard Inlet
200 and the 83 LF of 15” HDPE connecting it to the existing system may be unnecessary. Please remove
these unessential non-vegetated conveyances and re-grade this area so that surface flow is directed to
the existing collection system or provide the information needed for a high-density project.
SE Response: We have removed the piping you referenced and regraded to sheet flow into the existing
drainage network.
2. Please provide an original, signed hard copy of the Supplemental EZ Form and O&M Agreement form
(Section V and Section VI, 3). Both forms can be found at the following link:
https:/deq.nc.gov/about/divisions/energy-mineral-land-resources/energy-mineral-land-permit-
guidance/stormwater-bmp-manual. Note: Both forms use macros for customization; ensure that the
forms are enabled and all of the load forms and click to update links are clicked. The Supplement EZ Form
should have 3 pages (cover sheet, drainage areas sheet, and low density sheet). We are currently working
on including a low density option for the O&M agreement form. For the time being, please enter 1
“grassed swale” (as the maintenance is nearly identical) and make a note on the form that this is a low
density O&M agreement or provide an acceptable non-standard O&M agreement.
SE Response: Done. We have attached the requested forms.
3. Please include the bearings and distances for the property boundary on the plans (Section VI, 8i).
SE Response: Done. Note that this project is located on 2 separate parcels. The larger parcel to the
east is approximately 18 acres and is owned by the Town of Benson. A full boundary survey of the
entire parcel was outside the scope of our service agreement, so I have provided bearing/distance calls
for the boundary lines in the immediate area of the project work zone.
4. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and 1 hard copy of other documents.
PDF’s must be uploaded using the form at: https://edocs.deq.nc.gov/Forms/SW_Project_Submittal.
SE Response: Done.
Please let me know if you have additional questions or comments regarding this project.
Best Regards,

Zak Shipman, PE
Shipman Engineering, PLLC