| #Q001 | administrative | operational | mandatory | GI Approvals for Runoff Discharge | other | GI in right-of-way that discharges stormwater runoff to receiving water bodies requires the same approvals as conventional stormwater management infrastructure. | When discharging stormwater runoff to receiving water bodies | high |
| #Q002 | monitoring | operational | mandatory | Site Specific Investigations | other | Site specific investigations are required to confirm that appropriate conditions are present for successful green infrastructure installation. | | high |
| #Q003 | design | treatment | recommended | Hydrologic Patterns Analysis | other | The analysis of hydrologic patterns at the site should be carried out in accordance with the City's Wet Weather Flow Management Criteria and Chapter 3, Storm Sewers in the Design Criteria for Sewers and Watermains manual. | | high |
| #Q004 | design | treatment | mandatory | Target Adherence for Runoff | other | GI systems shall meet the targets specified in Chapter 4, Design Consideration to determine what level of runoff should be accommodated by the type of right-of-way. | | high |
| #Q005 | design | operational | mandatory | Utility Clearances Compliance | other | For GI systems, the clearances to the utilities shall comply with the specified requirements in Municipal Consent Requirements (MCR) document. | | high |
| #Q006 | administrative | operational | mandatory | Utility Clearances Exemptions | other | Exemptions to the specified utilities clearance requirements shall be discussed with the utility asset owners. | If seeking exemptions to specified clearances | high |
| #Q007 | design | operational | mandatory | Alternative Utility Considerations | other | The designer shall propose alternative considerations to meet the expectations of the City and impacted utility asset owners. | When proposing exemptions to utility clearance requirements | high |
| #Q008 | design | operational | mandatory | Building Setback Saturation Prevention | other | To avoid saturation of soil adjacent to building foundations and associated risks, infiltration-based GI systems shall be set back from buildings a minimum of 4 m unless impermeable liners are installed, or the building foundation has been waterproofed with liners or membranes and the proposed GI system has been agreed with the owner of the adjacent structure. | Unless impermeable liners are installed, or the building foundation has been waterproofed and agreed with owner | high |
| #Q009 | design | treatment | mandatory | GI Stormwater Integration | other | Green infrastructure systems in the right-of-way shall be an integrated part of a proposed or existing stormwater management system. | | high |
| #Q010 | design | treatment | mandatory | Compensatory GI Implementation | other | If the new right-of-way is unable to support a GI system, or the proposed GI system in the new right-of-way is unable to meet the water balance targets as set out in the City's Wet Weather Flow Management Guideline (WWFMG), then additional GI systems will be implemented within the proposed development area to compensate. | If the new right-of-way is unable to support a GI system, or the proposed GI system is unable to meet water balance targets | high |
| #Q011 | monitoring | operational | mandatory | Mandatory Site Information Collection | other | The designer must obtain site information including the depth to bedrock, depth to water table including seasonally high elevations, the location of any perched water tables, and the infiltration rate of the sub-soil. | | high |
| #Q012 | design | operational | mandatory | Underdrain or Liner Requirement | other | Should a GI system be sited at a location where the above criteria are not met, the system will require an underdrain or impermeable membrane liner. | Should a GI system be sited at a location where the required subsurface criteria are not met | high |
| #Q013 | design | operational | mandatory | Grate Requirements | other | All grates shall be non-slip and non-bolted. | | high |
| #Q014 | design | treatment | mandatory | Energy Dissipation Requirement | other | All inlets into GI systems require an energy dissipation mechanism in the form of a sediment pad or rip-rap. | | high |
| #Q015 | design | treatment | mandatory | Bypassed Flow Incorporation | other | It is important to note that any bypassed flow must be incorporated into the total gutter flow of the next downstream inlet, including the peak flow rate from its own contributing area. | | high |
| #Q016 | design | operational | mandatory | Underdrain Pipe Transition | other | The pipe shall transition to non-perforated pipe a minimum of 1m into the GI system prior to connecting to adjacent City sewers to prevent migration of sediment material. | | high |
| #Q017 | design | treatment | mandatory | Underdrain Hydraulic Calculation | other | Where underdrains are specified, the designer must calculate the hydraulic performance of the GI system and ensure the necessary balance of overall inflow versus overall outflow meets the design objectives. | Where underdrains are specified | high |
| #Q018 | design | operational | mandatory | Continuous Soil Trench Repose Angle | other | For continuous soil trenches, sides of trenches shall be engineered to have a stable angle of repose while providing the required soil volume. | | high |
| #Q019 | prohibition | operational | mandatory | Prohibition of Geofabric Perimeter | other | Avoid the use of geo-fabric or other solid material around the perimeter of trenches as this prevents lateral root growth. | | high |
| #Q020 | design | treatment | mandatory | Drainage and Aeration System | other | In all instances, a robust drainage and soil aeration system must be incorporated into the design. | | high |
| #Q021 | design | treatment | mandatory | Bioretention Flat Bottom Requirement | other | The bottom of the facility shall be flat to encourage infiltration across the full footprint area. | | high |
| #Q022 | design | treatment | mandatory | Bioswale Meander Requirement | other | When used to treat and/or convey roadway runoff, the bioswale shall meander with the roadway providing a bioswale length equal to or greater than the adjacent roadway length. | When used to treat and/or convey roadway runoff | high |
| #Q023 | design | operational | mandatory | Green Gutter Intersections Breaks | other | Breaks are to be integrated within the green gutter for crossings at intersections and transit stops. | | high |
| #Q024 | prohibition | operational | mandatory | Permeable Pavement Sanding Prohibition | other | Winter sanding operations should be prohibited where permeable pavement systems are specified. | Where permeable pavement systems are specified | high |
| #Q025 | monitoring | operational | mandatory | Permeable Pavement Subgrade Infiltration Testing | other | Subgrade infiltration capacity shall be determined by field testing and be based on the compacted state if required for structural support. | | high |
| #Q026 | design | operational | mandatory | Permeable Pavement Edge Restraints | other | Suitable concrete edge restraints are required to support paver units, withstand temperature changes, vehicular traffic, snow removal equipment, and to prevent the spreading of joints or unravelling of edges. | | high |
| #Q027 | design | operational | mandatory | Permeable Pavement Monitoring Well | other | A capped 100mm monitoring well as per detail T-850.041 shall be installed from the surface to the bottom of the facility. | | high |
| #Q028 | design | treatment | mandatory | Infiltration Trench Pre-treatment | other | Adequate pre-treatment features are required based on the site context to prevent sediment and debris from entering and impeding infiltration performance. | | high |
| #Q029 | design | operational | mandatory | Infiltration Trench Frost Prevention | other | Inlet and outlet pipes with a 200mm diameter shall be installed below the maximum frost penetration depth to prevent freezing. | | high |
| #Q030 | administrative | reporting | mandatory | SWPPP Compliance and Site Description | wastewater, other | Note that construction site SWPPPs must follow the requirements of the applicable State or EPA CGP and must describe the specific conditions of the site and plans for development. | Applicable for construction site operators developing SWPPPs | high |
| #Q031 | design | treatment | mandatory | Sediment Basin Design Volume | wastewater, other | if you install a sediment basin, one of the two alternative design requirements is to provide storage for the calculated volume of runoff from a 2-year, 24-hour storm. | If a sediment basin is installed | high |
| #Q032 | operational | treatment | mandatory | Antidegradation Special Requirements for Tiered Waters | wastewater, other | EPA’s CGP has special requirements for discharges to waters that receive Tier 2, Tier 2.5, or Tier 3 protections for antidegradation purposes. | Discharges to waters receiving Tier 2, Tier 2.5, or Tier 3 protections | high |
| #Q033 | reporting | reporting | mandatory | Inspection and Corrective Action Documentation | wastewater, other | EPA developed the following templates to help you document your findings for site inspections, dewatering inspections, and corrective actions as required by the 2022 CGP. | As required by the 2022 CGP | high |
| #Q034 | administrative | unknown | mandatory | State and Federal Law Precedence | other | In the case of any conflict between these summaries and a state or federal law, the state or federal law governs. | In the event of a conflict between REUSExplorer summaries and actual state or federal law | high |
| #Q035 | administrative | reporting | guidance | State Authority Verification | drinking water, wastewater, agricultural water, aquatic life, recreational water, other | These summaries are not legally binding; please always refer to your state for the latest information. | When using REUSExplorer summaries for compliance or regulatory planning | high |
| #Q036 | administrative | unknown | mandatory | State and Federal Law Precedence | other | In the case of any conflict between these summaries and a state or federal law, the state or federal law governs. | In the event of a conflict between REUSExplorer summaries and actual state or federal law | high |
| #Q037 | administrative | reporting | mandatory | WATERS Dataset Inclusion Criteria | drinking water, wastewater, agricultural water, aquatic life, recreational water, other | To be included in this dataset states and other jurisdictions must have submitted information to the program database and be indexed to NHDPlus hydrography. | To be included in this dataset | high |
| #Q038 | reporting | reporting | mandatory | CWA Integrated Report Submission | drinking water, wastewater, agricultural water, aquatic life, recreational water, other | States, territories and authorized tribes (states for brevity) assess the quality of their surface waters and report it to EPA as part of their Integrated Report, which combines Clean Water Act Sections 303(d) and 305(b). | | high |
| #Q039 | reporting | reporting | guidance | Bi-annual Data Provision Frequency | drinking water, wastewater, agricultural water, aquatic life, recreational water, other | States typically provide this data to EPA every two years, but the currency of the data may vary by state. | | high |