Stormwater management plans are required for all redevelopment. Stormwater management measures must be consistent with the Design Manual.
(A) All redevelopment shall:
(1) Reduce impervious area within the limit of disturbance (LOD) by at least 50 percent according to the Design Manual; or
(2) Implement ESD to the MEP to provide water quality treatment for at least 50 percent of the existing impervious area within the LOD; or
(3) Use a combination of subsections (A)(1) and (A)(2) above for at least 50 percent of the existing impervious area within the LOD; and
(4) Provide stormwater management for 100% of any net increase in impervious area.
(B) The following structural BMPs may be used to meet the requirements in subsection (a) above provided that the applicant demonstrates that impervious area reduction has been maximized and ESD has been implemented to the MEP:
(1) On-site structural BMP; or
(2) Off-site structural BMP to provide water quality treatment for an area equal to or greater than 50 percent of the existing untreated impervious area.
(C) The Division may develop separate policies for providing water quality treatment for redevelopment in the event the requirements of this section cannot be met. Any separate redevelopment policy shall be reviewed and approved by the administration and may include, but not be limited to:
(1) A combination of ESD and an on-site or off-site structural BMP;
(2) Retrofitting including existing BMP upgrades, filtering practices, and off-site ESD implementation;
(3) Participation in a stream restoration project;
(4) Pollution trading with another entity;
(5) Payment of a fee-in-lieu; or
(6) A partial waiver of the treatment requirements if ESD is not practicable.
(D) The determination of what alternatives will be available may be made by the Division at the appropriate point in the development review process. The Division shall consider the prioritization of alternatives in § 1-15.2-3.4(C) of this chapter after it has been determined that it is not practicable to meet the current requirements using ESD. In deciding what alternatives may be required, the Division may consider factors including, but not limited to:
(1) 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;
(2) Whether the project is necessary to accommodate growth consistent with comprehensive plans; or
(3) Whether bonding and financing have already been secured based on an approved development plan.
(Ord. 10-09-544, 5-20-2010; Ord. 14-23-678, 11-13-2014)