Current through November 21, 2024
Section 250-RICR-150-10-8.19 - Structural Stormwater Treatment Practices for Meeting Water Quality - OverviewA. §§ 8.20 through 8.25 of this Part provide the requirements for acceptable structural BMPs that can be used to meet the water quality criteria in § 8.9 of this Part. Sediment volumes do not need to be calculated for sizing of the BMPs in §§ 8.20 through 8.25 of this Part.B. Minimum Design Criteria for BMPs: If required design criteria for a particular BMP cannot be met at a site, an alternative BMP must be selected, or adequate justification must be provided to the approving agency why the particular criteria is not practicable. Design requirements are provided for the following 6 categories: 1. Feasibility: Identify site considerations that may restrict the use of a practice.2. Conveyance: Convey runoff to the practice in a manner that is safe, minimizes erosion and disruption to natural channels, and promotes filtering and infiltration.3. Pretreatment: Trap coarse elements before they enter the facility, thus reducing the maintenance burden and ensuring a long-lived practice.4. Treatment/Geometry: Provide the required water quality treatment through design elements that provide the maximum pollutant removal.5. Environmental/Vegetation: Reduce secondary environmental impacts of facilities through features that minimize disturbance of natural stream systems and comply with environmental regulations. Provide vegetation that enhances the pollutant removal and aesthetic value of the practice.6. Maintenance: Maintain the long-term performance of the practice through regular maintenance activities, and through design elements that ease the maintenance burden.250 R.I. Code R. 250-RICR-150-10-8.19
Amended effective 11/13/2018