3.3
There are two categories of source control BMPs: operational and structural. Operational source control BMPs are non-structural practices that prevent or reduce pollutants from entering stormwater. Examples include formation of a pollution prevention team, preventive maintenance/good housekeeping, spill prevention and cleanup, employee training, inspections, and record keeping. They can also include process changes, raw material/product changes, and recycling wastes. Operational source control BMPs are considered the most cost-effective pollutant minimization practices.
Structural source control BMPs are physical, structural, or mechanical devices or facilities that are intended to prevent pollutants from entering stormwater. Examples of structural source control BMPs include:
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Enclosing and/or covering the pollutant source (e.g., within a building or other enclosure, a roof over storage and working areas, temporary tarp, etc.).
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Physically segregating the pollutant source to prevent run-on of uncontaminated stormwater.
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Devices that direct only contaminated stormwater to appropriate treatment BMPs (e.g., discharge to a sanitary sewer if allowed by the local sewer authority).