TSS and TP Removal Efficiency Evaluation Strategies

TSS and TP Removal Efficiency Evaluation Strategies
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Pollutant Removal Assessment Strategy	Description	Relative effort	Relative accuracy
Evaluation of MPCA stormwater pond design criteria	Evaluation of pond sizing criteria against MPCA stormwater pond design standards to produce a relative evaluation of pond performance	Low	Low
Stormwater pond inspection/assessment	Guidance related to scheduling and performing routing visual inspections and less-frequent assessments of pond sedimentation depth	Medium/high	NA1
Stormwater pond pollutant removal modeling	Evaluation of the pollutant reduction achieved by stormwater ponds through the use of empirically-based or physically-based water quality models	Low/medium	Medium
Stormwater pond water quality monitoring	Evaluation of the pollutant reduction achieved by stormwater ponds through direct monitoring of pollutant concentrations into and leaving the pond	High	High

¹Stormwater pond inspection/assessment does not inherently provide an estimate of TSS/TP removal. However, inspection/assessment efforts are critical to ensuring a stormwater pond is performing as originally designed.