Expected performance for temporary/permanent sediment traps and basins.
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Water quantity
Flow attenuation Secondary design benefit
Runoff volume reduction Secondary design benefit
Water quality
Erosion prevention Little or no design benefit
Sediment control Primary design benefit
Nutrient loading Secondary design benefit
Pollutant removal
Total suspended solids Primary design benefit
Total phosphorus Secondary design benefit
Heavy metals Secondary design benefit
Floatables Secondary design benefit
Oil and grease Secondary design benefit