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In last month’s blog post, we took a look at the Point on a Curve sizing methodology. In this month’s post, we will look at the other common HDS sizing methodology: the Net Annual sizing method. As a reminder, proper sizing should start by checking local regulations.The Net Annual method is used to determine an HDS system’s pollutant removal

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Proper sizing of hydrodynamic separators (HDS) should start with checking applicable regulations. In many cases, local or state regulations will dictate how to size an HDS system and even provide a list of what products are approved for use.  If there are no regulatory requirements, the engineer must identify which pollutant(s) need to be removed

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As a biofiltration surface layer, mulch can support water retention, weed suppression, organic replenishment, pollutant treatment, aesthetics, media protection from scour, and moderate media temperature. Landscape mulches can include organic mulches like fresh wood chips or aged composted mulch, as well as inorganic mulches such as rock and rubber

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Installing a Stormwater BMP is an important step towards protecting our waterways, but for them to perform as designed, they must be maintained regularly. Where do we dispose of the material removed from catch basins and stormwater treatment systems after maintenance?  I get that question regularly from both private and municipal maintenance

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At the heart of every bioretention system is the media that captures and immobilizes pollutants that are then decomposed, volatilized and incorporated into the biomass of the system’s micro/macro fauna and flora. Bioretention media cannot be the heart of the system removing the intended pollutant load when flow rate is compromised due to premature

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Let’s start by stating what I would consider to be an obvious fact: all Stormwater BMPs require maintenance. Whether we are talking about public domain or manufactured treatment devices, they all need routine maintenance to ensure they operate efficiently over extended periods of time.Maintenance is defined as the routine recurring work required to

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I would consider myself a big picture thinker, always seeking to understand the full story, including the whys and how’s of a given situation.  I also like to probe below the surface and get my head around the root of a problem since that’s where the lasting solutions are usually found.  When I look around the full breadth of the stormwater

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Three Components of Infiltration System DesignCommon infiltration practices include drywells, bioretention, permeable pavement, infiltration trenches, infiltration basins, and subsurface infiltration galleries. Regardless of their form, all infiltration systems have three primary components: storage, treatment, and infiltration.1. StorageRetention

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An appropriately designed and manufactured high performance biofiltration system combines the benefits of natural biofiltration with the reliable and predictable performance of an engineered system. Each high performance biofiltration system utilizes a multifaceted approach including physical, chemical and biological processes to capture,

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It’s that time of year again - temperatures have dropped below freezing, and the wintery weather has blown in. Departments of Transportation, state, local and city road crews are being kept on their toes, applying roadway treatments and safe passage for all of us. It is estimated that the US spends approximately $2.3 billion annually to keep highways free of snow and ice, and roughly 20% of transportation department budgets goes toward winter road maintenance.

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