7 Del. Admin. Code § 7403-5.0
Current through Reigster Vol. 28, No. 6, December 1, 2024
Section 7403-5.0 - Sediment and Stormwater Controls5.1 Sediment and stormwater runoff shall be managed for nutrient reductions where practicable.5.2 When the Delaware Sediment and Stormwater Regulations require the creation of a permanent sediment and stormwater management plan, that plan shall be designed and implemented to include design criteria to further reduce nutrient contributions. Consistency will be determined at the conceptual stormwater plan process step. Compliance will be determined before approval of final site or subdivision plans.5.3 Compliance with 5.2 of these Regulations shall be achieved using one of the following methods: 5.3.1 For properties that contain primary and/or secondary water features, establish buffers consistent with Section 4.2 of these Regulations; or5.3.2 For properties that contain primary and/or secondary water features, establish buffers consistent with Sections 4.3 and 4.4 of these Regulations in combination with any of the options listed in 5.3.3 of this Section; or5.3.3 For properties that utilize a reduced width buffer or do not contain primary or secondary water features, select any of the options listed in 5.3.3.1 - 5.3.3.4 below: 5.3.3.1 Reduce nutrient contributions by the percentage required by the TMDL for the watershed in which the project is located, based on a comparison between the post-developed condition with and without stormwater quality management best management practices using the procedures outlined in the guidance document entitled, "Achieving Stormwater Pollution Control Strategy Reductions for Water Quality"; or5.3.3.2 Reduce nutrient contributions so as to achieve irreducible concentrations of nutrients using the procedures outlined in the guidance document entitled, "Achieving Stormwater Pollution Control Strategy Reductions for Water Quality"; or5.3.3.3 Reduce nutrient contributions using three practices within a treatment train using the procedures outlined in the guidance document entitled, "Achieving Stormwater Pollution Control Strategy Reductions for Water Quality"; or5.3.3.4 Establish 30% of project parcel as forest in common open space through preservation and protection of existing forest stands or creation of new forest stands in accordance with the guidance document entitled, "Forestry Guidance for Inland Bays Pollution Control Strategies." In order to comply with the stormwater management requirements of this section, to the extent practicable, the forested area shall be an integral component of the project's stormwater management plan.5.4 When Sections 5.3.1 or 5.3.2 apply, the buffer zone shall be established in accordance with Section 4 of these Regulations.7 Del. Admin. Code § 7403-5.0