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EXHIBIT A The Code of the City of Portsmouth, Virginia is amended by adding the following new Chapter 11.1. Chapter 11.1 EROSION AND STORMWATER MANAGEMENT ARTICLE 1. EROSION AND STORMWA TER MANAGEMENT PROGRAM Sec. 11.1-1. Title and purpose; authority. (a) Title and purpose. This article shall be known as the "Erosion and Stormwater Management Ordinance of the City of Portsmouth." (b) The purpose of the article is to ensure the general health, safety and welfare of the citizens of Portsmouth, protect the quality and quantity of state waters from the potential harm of unmanaged stormwater and soil erosion, including protection from a land disturbing activity causing unreasonable degradation of properties, water quality, stream channels, and other natural resources, and to establish procedures whereby stormwater requirements related to water quality and quantity shall be administered and enforced. (c) Authority. This chapter is authorized by Code of Virginia, § 62.1-44.15:27. (d) This chapter shall be effective as of January 28, 2025. Sec. 11.1-2. Definitions. The following words, terms and phrases, when used in this chapter, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning: Administrator means the city engineer or his designee[s]. Adequate channel means a channel that will convey the designated frequency storm event without overtopping the channel bank nor causing erosive damage to the channel bed or banks. Agreement in lieu of a plan means a contract between the city and the owner or permittee that specifies methods that shall be implemented to comply with the requirements of the VESMA and this chapter for the construction of a (i) single-family detached residential structure or (ii) farm building or structure on a parcel of land with a total impervious cover percentage, including the impervious cover from the farm building or other structure to be constructed, of less than five percent; such contract may be executed by the city in lieu of a soil erosion control and stormwater management plan. Applicant means a person submitting a soil erosion control and stormwater management plan to the city for approval in order to obtain authorization to commence a land disturbing activity, or a person otherwise submitting an application for a permit or requesting issuance of a permit under this chapter. Best management practice or BMP means schedules of activities, prohibitions of practices, maintenance procedures, and other management practices, including both structural and nonstructural practices, to prevent or reduce the pollution of surface waters and groundwater systems. Nonproprietary best management practice means both structural and nonstructural practices to prevent or reduce the pollution of surface waters and groundwater systems that are in the public domain and are not protected by trademark or patent or copyright. Proprietary best management practice means both structural and nonstructural practices to prevent or reduce the Page 1 of 27