![]() CADD dwg file for infiltration basin plan and profile.RECOMMENDED - Indicates guidance or other information that is helpful but not critical. HIGHLY RECOMMENDED - Indicates guidance or other information that is extremely beneficial or necessary, but not specifically required by the MPCA CGP. REQUIRED - Indicates standards stipulated by the CGP or other consistently applicable regulations. Warning: REQUIRED - Indicates requirements stipulated by the MPCA Construction General Permit (CGP) or other consistently applicable regulations The following terminology is used throughout this page. Link here for requirements of the Construction Stormwater General Permit for infiltration systems Prepare Operation and Maintenance (O&M) Plan Check volume, peak discharge rates and drawdown time against State, local and watershed organization requirements Determine pretreatment volume and design pretreatment measures Size outlet structure and/or flow diversion structure, if needed 9.5.2 Determine site infiltration rates (for facilities with infiltration and/or recharge).Determine infiltration type and size practice Perform field verification of site suitability Confirm design criteria and applicability 8 Materials specifications - filter media.6.4.3 Slope of the infiltration practice.6 Major design elements - Practice and site considerations.5.4 Depth to groundwater table and bedrock.5 Major design elements - Physical feasibility initial check.4 Design phase maintenance considerations.
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