2026 05 Storm Water Management Report rcd 5 6 2026

evaluated with the following drainage sub-watershed areas as depicted on the Existing Drainage Area Map included in the Appendix of this report. Point of Analysis #1 Study Area 1: This area consists of 0.534 acres which include roof, motor vehicle surfaces, impervious and grass areas. Under existing conditions, stormwater runoff generated by this area flows to the five (5) on-site inlets, as depicted on the Existing Inlet Area Map. Existing Conditions Input Summary Table Drainage Area Name Drainage Area Time of Curve Number (acres) Concentration (CN) (minutes) EDA 1 - Impervious 0.377 Ac 1.6 98 EDA 1 - Pervious 0.157 Ac 4.5 61 Existing Conditions Flow Summary Table Drainage Current Adjusted Rainfall Projected Adjusted Rainfall Area Conditions Conditions Name Q2 (CFS) Q10 (CFS) Q100 (CFS) Q2 (CFS) Q10 (CFS) Q100 (CFS) POI #1 1.44 2.41 4.45 1.75 2.94 5.76 Point of Analysis #2 Study Area 2: This area consists of 0.044 acres which include the portion of the area to be developed which drains to Prospect Avenue. Under existing conditions, stormwater runoff generated by this area flows overland to the right-of-way, as depicted on the Existing Drainage Area Map. Existing Conditions Input Summary Table Drainage Area Name Drainage Area Time of Curve Number (acres) Concentration (CN) (minutes) EDA 2 - Impervious 0.015 Ac 0.8 98 EDA 2 - Pervious 0.029 Ac 4.1 61 Existing Conditions Flow Summary Table Drainage Current Adjusted Rainfall Projected Adjusted Rainfall Area Conditions Conditions Name Q2 (CFS) Q10 (CFS) Q100 (CFS) Q2 (CFS) Q10 (CFS) Q100 (CFS) POI #2

d Adjusted Rainfall Area Conditions Conditions Name Q2 (CFS) Q10 (CFS) Q100 (CFS) Q2 (CFS) Q10 (CFS) Q100 (CFS) POI #2 0.07 0.14 0.30 0.09 0.18 0.41 Mavis Tire Supply, LLC July 2025 DEC# 1956-24-04187 3 Last revised May 2026