Stormwater management plans are required by the Department for all redevelopment, unless otherwise specified by watershed management plans developed according to this Division. Stormwater management measures must be consistent with the Maryland Design Manual and the Prince George's County Design Manual). All redevelopment designs shall: Reduce impervious area within the limit of disturbance (LOD) by at least 50 percent according to the Maryland Design Manual and the Prince George's County Design Manual; Implement ESD to the MEP to provide water quality treatment for at least 50 percent of the existing impervious area within the LOD; or Use a combination of subsections (b)(1) and (2) for at least 50 percent of the existing site impervious area within the LOD; and Infiltrate into the ground 100 percent of the annual average predevelopment groundwater recharge volume if soil's infiltration is 1.02 inches per hour or greater. All redevelopment designs approved after May 4, 2016, shall: Reduce impervious area within the LOD by 75 percent in accordance with the Maryland Design Manual and the Prince George's County Design Manual; Implement ESD to the MEP to provide water quality treatment for 75 percent of the existing impervious area within the LOD; or Use a combination of subsections (c)(1) and (2) to meet 75 percent of existing site impervious area within the LOD; and Infiltrate into the ground 100 percent of the annual average predevelopment groundwater recharge volume if soil's infiltration is 1.02 inches per hour or greater. All redevelopment designs approved after May 4, 2019, shall: Reduce impervious area within the LOD by 100 percent in accordance with the Maryland Design Manual and the Prince George's County Design Manual; Implement ESD to the MEP to provide water quality treatment for 100 percent of the existing impervious area within the LOD; or Use a combination of subsection (d)(1) and (2) to meet 100 percent of existing site impervious area within the LOD. The Director may consider a variance under Section 32-176 of this Division. To offset the cost and design impacts of achieving the requirements of subsection (b) and (c) of this section, redevelopment designs that exceed the County requirements by twenty-five (25) percent and that are approved after May 4, 2011, are eligible to receive, subject to Subtitle 27 of the County Code: Increased density through the public benefit credits, density increment factors or additional floor area ratios (FAR); Reduction in the number of spaces and design of on-site and off-site parking to accommodate ESD techniques up to a maximum reduction of fifteen (15) percent of the required parking under Subtitle 27 of this Code, subject to the approval of a minor departure; Priority consideration during the County's development review and permitting processes; Eligibility for residential revitalization tax credit under Subtitle 10 and Subdivision 5B of the County Code without Council approval; MEP shall be determined by the Director. All redevelopment projects shall reduce existing site stormwater runoff volume by implementing distributed ESD to the MEP. Where conditions prevent the implementation of ESD techniques to reduce runoff, the Maryland Design Manual and the Prince George's County Design Manual criteria shall be implemented. Alternative stormwater management measures may be used to meet the requirements in subsections (a), (b), (c) and (l) if the owner/applicant satisfactorily demonstrates to the Department that impervious area reduction has been maximized and ESD has been implemented on-site to the MEP. Off-site ESD in the impacted watershed shall be the preferred alternative stormwater measure. Alternative stormwater management measures include, but are not limited to: An on-site structural BMP; An off-site structural BMP to provide water quality treatment for an area equal to or greater than 50 percent of the existing impervious area; or A combination of impervious area reduction, ESD implementation, and on-site or off-site structural BMP for an area equal to or greater than 50 percent of the existing site impervious area within the LOD; Participation in a stream restoration project; Pollution trading with another entity; Design criteria based on watershed management plans developed according to this Division; Fees paid that are dedicated exclusively to provide stormwater management; and Other appropriate practices. The Department shall develop policies for providing stormwater management for redevelopment projects if the requirements of subsections (a), (b), (c) and (l) are not met after all opportunities for using onsite and offsite ESD have been exhausted during the planning process. After being reviewed and approved by the Administration, these proposed policies will be provided to the County Council for its approval. The Department may consider factors, including, but not be limited to: Whether the project is in an area targeted for development incentives such as a Priority Funding Area, a designated Transit Oriented Development area, or a designated Base Realignment and Closure Revitalization and Incentive Zone; Whether the project is necessary to accommodate growth consistent with comprehensive plans; or Whether bonding and financing have already been secured based on an approved development plan. In considering these factors in (1), (2) and (3) above in this subsection (j), the Department shall also consider the existing water quality, erosion, flooding and expected needs for County investment in stream restoration, erosion control and flood control in the areas affected by redevelopment. Stormwater management shall be addressed for the portion of the site within the limit of disturbance according to the new development requirements in the Maryland Design Manual and the Prince George's County Design Manual for any net increase in impervious area. If the Department determines that existing flooding and/or erosion exist downstream of the proposed development, the Department: should require the applicant to manage the channel protection volume using ESD to the MEP; and has authority to require the applicant to attenuate the 2-year and 10-year storm runoff for downstream erosion for residual volume not addressed by ESD; and has authority to require the applicant to attenuate the 100-year frequency storm event for downstream flooding in accordance with the Maryland Design Manual and the Prince George's County Design Manual.