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BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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4.4.2 FLOW THROUGH TREATMENTFlow-through treatment <strong>BMP</strong>s remove pollutants from stormwater prior todischarge and retain little if any stormwater within the <strong>BMP</strong>. These <strong>BMP</strong>sprovide a wide range of effectiveness, from removal of trash to removal ofdissolved nutrients. <strong>BMP</strong>s such as the baffled vault, sediment trap,hydrodynamic separator, and some drop inlet inserts are best for removingcourse particles, debris, and oil and grease (when used with oil-adsorbentmaterials) prior to discharge to a second <strong>BMP</strong> such as an infiltration system.Use of these <strong>BMP</strong>s will extend the maintenance cycle for the second <strong>BMP</strong>.Media filtration <strong>BMP</strong>s, including some which are designed as drain inlet inserts,are designed to treat water to discharge standards. Because of the typically highcost of installation and maintenance of media filtration <strong>BMP</strong>s, these types of<strong>BMP</strong>s are used when there is an inability to infiltrate water on-site.TRPA <strong>BMP</strong> HandbookChapter 4: <strong>BMP</strong> Toolkit2012 Page 1

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