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3.2023 - Re-submittal Letter me (NHC Storm) 101 Falls Park Drive, Suite 601, Greenville, SC 29601 ph. 864.271.8869 www.brittpeters.com fax 864.233.5140 March 1, 2023 Mr. Galen Jamison, PE New Hanover County Engineering 230 Government Center Drive, Suite 160 Wilmington, NC 28403 RE: Take 5 Oil Change – Wilmington, NC 7250 Market Street Wilmington, NC 28411 BPA Job#: 210620 Energov #: SITECN-22-000003 Dear Mr. Jamison: Enclosed are revised plans for the above referenced project. Numbering below corresponds with the comments received on January 25, 2022 with responses as follows: 1. Project narrative added to cover sheet. 2. Owner’s Certification added to C0.0. Noted. 3. CN for gravel revised to 98. 4. Rainfall distribution changed to Type III and precipitation revised according to NOAA data. 5. Gutter flow calculations added to Hydrology Report. 6. Pipe size changed to 15”. Minimum cover is 2’. Cover provided is 2.25’ 7. Pipe drainage system is now sized for 25 year storm event. 8. Catch basin outfall pipe’s slope and length has been revised to match. 9. Infiltration System has been modified to detention system. 10. Infiltration System has been modified to detention system. 11. Infiltration system has been modified to a detention system. Per previous conversations, the system will overflow out of the catch basin and downstream to the south. 12. Inspection ports / cleanouts shown in updated set on C5.0. 13. This area is flushed. Runoff with sheet flow to the southeast. Page 2 of 2 Please contact our office if you have any questions or comments. Sincerely, BRITT, PETERS & ASSOCIATES, INC. John A. Connelly, P.E., LEED® AP Vice President Enclosures cc: (name via email)