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The task of selecting the proper stormwater BMP for your site can be tedious. There are thousands of choices; from drainage swales and silt fences to hydrodynamic separation and storm water filtration systems. All of them have their place in a well written BMP Plan, but none of them will work without maintenance. During my time as a state

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A rainwater harvesting cistern is comprised of many components. Our experience is that some of these components are often overlooked, which can negatively impact water quality. Here is our list of the top five commonly missed rainwater cistern components and why they are important .1. Calming InletThe calming inlet reduces the velocity of water

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During the past few years, a number of different filter media have been used for stormwater filtration. Media such as sand, peat, and compost have been used successfully. Recent uses of perlite, zeolite, carbon, and other “exotic” media have expanded the choices for targeting specific pollutants. Here are some questions you should ask when

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The intent of LEED Sustainable Sites Credit 6.2 is “to limit disruption and pollution of natural water flows by managing stormwater runoff,” and the requirements necessary for meeting this intent are clearly spelled out: capture 90% of the average annual rainfall and treat it by removing 80% of the total suspended solids (TSS). While the rating

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By now, you’ve probably heard of triple bottom line accounting, a full cost accounting approach considering the economic, environmental and social impacts of a decision or more poetically, the three P’s: people, planet and profit. In the stormwater infrastructure planning world, as in many other urban planning arenas, this approach is gaining

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 This short video explains how rainwater harvesting is a logical and feasible approach to managing stormwater runoff, citing example usage for a typical commercial office building.Current engineering practice divides management of drinking water, stormwater, and wastewater. A typical commercial office building may average 3.1 million gallons of

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This patented technology is employed by the Stormwater Management StormFilter in order to prevent surface blinding, ensure use of all media, and prolong cartridge life. In principal, the system siphons stormwater runoff through its cartridge.First, stormwater enters a StormFilter cartridge, percolates horizontally through the cartridge’s filter

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As an industry, we’ve acquired a vast amount of knowledge about stormwater, its adverse impacts, and the best management practices (BMPs) implemented to mitigate them. However, the spirited debate with regard to whether the field or the laboratory is the best arena for evaluating BMP performance refuses to yield to consensus. Here are some of the

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Filtration CharacteristicsMedia Surface AreaFiltration flow rates are typically expressed as a surface area specific operating rate such as gallons per minute per square foot (gpm/ft2) of surface area. Lower specific operating rates translate to better performance and longer maintenance cycles. Specific operating rates higher than 2 gpm/ft2 of

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If more than one type of infiltration system meets your project requirements, your decision may be cost driven. It’s important to maximize the storage efficiency in the available space at the lowest possible cost.Underground, Open-Bottomed Chambers This example highlights the need to evaluate multiple options and configurations to find the most

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