When we generate new ideas, how well do we transition from initial innovation to general acceptance and widespread implementation? One of the critical factors in this process seems to be the availability of support and maintenance services within an industry. These innovations need to function reliably over time, and as many are too complicated for us to maintain ourselves, we depend on various support mechanisms such as auto mechanics and the helpful geek at the Apple Store to ensure this longevity.
The initial wave of manufactured treatment devices (MTDs) were generally simpler than options available today. With few exceptions, early MTDs were comprised predominantly of swirl/vortex and other types of gravity separators that targeted solids and floating pollutants. State and local stormwater programs were in their infancy and were predominantly focused on reducing suspended solids loads. Our knowledge of particle size distributions and other common pollutants carried by stormwater paled in comparison to what we know today. MTD testing protocols were non-existent leaving early MTD providers to devise their own and make their case for acceptance. Regulators recognizing the need for underground solutions, especially in urban areas, implemented crude MTD performance criteria typically rooted in demonstrating removal of coarse solids in the laboratory.
Did you drive to work this morning? Was a parking space waiting for you when you arrived? Many cities require developers to provide a minimum number of parking spaces for office, retail, and residential buildings; sometimes the number is based on the square footage of the building, sometimes on occupancy. Many calculate the required number of spaces based on peak demand.
For the majority of applications, corrugated metal pipe (CMP) is the “go to” material for subsurface infiltration. This in turn, leads to a lot of design questions. Below is a list of six questions and answers we received from a recent webinar on designing CMP detention systems.
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