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→Concentrated overland flow
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See [[Pretreatment features]] for guidance on sizing.
* Catch basin or other pre-fabricated inlet structure sump;
* Catch basin or other pre-fabricated inlet structure sump;
* [[Level spreader]];
* [[Level spreader]];
−*[[Pretreatment features| Forebays]] (well suited for bioretention cells);
+*[[Pretreatment features| Forebays]] (well suited for bioretention cells) See [[Pretreatment features]] for guidance on sizing.;
* [[Stone]] and [[geotextile]] filter: A shallow excavation on the filter media bed surface at the inlet, lined with geotextile and rip rap or decorative stone cover; and,
* [[Stone]] and [[geotextile]] filter: A shallow excavation on the filter media bed surface at the inlet, lined with geotextile and rip rap or decorative stone cover; and,
*[[Sand filters]] (well suited for underground [[infiltration]]);
*[[Sand filters]] (well suited for underground [[infiltration]]);
*Concrete sump pretreatment device. [https://acfenvironmental.com/products/stormwater-management/filtration/rain-guardian/ Rain Guardian] is one example of a proprietary sump device.
*Concrete sump pretreatment device. [https://acfenvironmental.com/products/stormwater-management/filtration/rain-guardian/ Rain Guardian] is one example of a proprietary sump device.
−==Concentrated underground flow==
==Concentrated underground flow==