With more and more emphasis being put on storm water quality control and the use of best management practices (BMPs) such as sediment forebays in detention/retention basins it is often overlooked that large state/county/local road projects don’t have the space available to install what can be quite large above ground storage systems, or they don’t have the funds to install an underground system. As a result road drainage runoff and the associated pollutants (oil, fertilizers, salt) as well as trash (plastic bottles, lawn clippings, plastic bags) just flow straight into the sewer system and eventually discharges into our lakes and stream and this action is not promoting a healthy environment. Communities have begun to try to fight against this pollution by first installing new catch basin inlet castings with sayings of “discharges to streams” in an effort to educate the public but even this isn’t enough.
There are several newer designs that are being used more and more these days in order to improve the storm water runoff quality before it reaches the streams. One of the best ways to reduce the amount of pollutant laden runoff from entering the storm sewer system is to just not let it. Rain gardens are a solution that are being utilized more and more across the country, particularly in developed areas that contain limited space and that presently have no means of treating runoff. The overall size of rain gardens can vary depending on the amount of runoff that is desired to be treated, but they all operate in the same manner. By increasing the amount of vegetation that wants to absorb water while also slowly the runoffs velocity, rain gardens reduce the amount of runoff from being channeled underground. As this article shows rain gardens are being used not as a replacement for storm sewers but as a means to increase the storm water quality before it reaches our streams and lakes.
http://www.startribune.com/…
If storm sewer systems must still be used there are several options for treating storm water with no noticeable aboveground features. One is called a hydro-dynamic separator (HDS). This device is installed as a typical inlet/catch basin that we see everyday with the difference being that a inlet/catch basin will just catch runoff and direct it into a pipe with no cleaning. A HDS unit in one of several different ways (screens, filters, vortex action) will remove pollutants and debris depending on the type you design it to remove and to what level of cleanliness. While these units work very well they do require maintenance and cleaning on a schedule based on the amount of pollutants that enter the unit. Of course this maintenance requires money in addition to the original cost of the unit which is dependent on the size of the unit which is based on the flow it is designed to handle.
A lower cost and simple method of controlling larger pollutants and floatables is the use of Snouts. Snouts are a plastic cover that cover the downstream pipe inside of a storm sewer manhole. As can be seen on this link the Snout works by preventing pollutants from entering the manhole and then continuing downstream by re-directing the flow down under the Snout and then up through the outlet.
http://www.bmpinc.com/
The method works due to the way that water works which always seeks the lowest point possible while maintaining a constant elevation. Because of this the water level on either side of the Snout will always be the same, but the pollutants will be kept on one side while the cleaner storm water discharges on the other (This also occurs due to the Snout extending below the invert of the downstream pipe which helps to keep the pollutants inside the structure even when no rain event is occurring) While the Snouts may seem that they are considerably cheaper than an HDS unit this can be deceiving. In order to install the Snout a manhole must be wider in diameter and have a deeper sump than traditional units. These additions can increase the cost, but depending on the size of the manhole/pipe this system is typically still cheaper than an HDS. Snouts do require periodic cleaning, but it would be no different than if the structure had a traditional sump that would need to be cleaned. Snouts can be used for existing manholes depending on the required dimensions.
When designing tomorrow’s roads more thought must be given to how this road will impact the environment both today and in the future. By utilizing new and different BMPs a smaller impact can be achieved while still designing a system that satisfies all the engineering requirements.
It has been just over a month since we started our green initiative around the office. We have focused on changing our daily routines and product usage. To date, we have been quite successful. Yes, there have been a few naysayers but most everyone is pitching in.
Greening the Office Accomplishments:
- Recycling program in conjunction with Recycle Ann Arbor. We now collect, sort and deliver white paper, mixed paper, newspaper, magazines, books, cardboard, plastic, and styrofoam.
- Electronic recycling with Recycle Ann Arbor and Best Buy. Best Buy will accept our old monitors, computers, etc for a $10 fee but they give us a $10 gift card.
- We have been in the process of switching out lighting throughout the office with compact fluorescent light bulbs. The only notable difference is in our main conference room – the existing dimmer switches are no longer effective.
- Normal copier and printer paper (letter, legal, ledger and letterhead) have been replaced with recycled paper products. Not are we being environmentally friendly, the cost per ream of paper has been reduced by about $0.25.
- Additionally, we have set the default on our copiers to the duplex setting. Multi-page documents will be printed on two sides unless otherwise changed by the user.
- As our existing cleaning supplies have dwindled and needed to be replaced, we have switched to green cleaning supplies for the carpets, bathrooms, windows, and countertops/surfaces.
- We have also switched to recycled paper products for napkins, paper towels, and toilet paper.
Hopefully, we are just beginning and can sustain the current momentum. Other changes we are looking at include: motion sensor light switches, recycled paper for a large format printing, and more. Please leave a comment if you have other ideas that have worked at your office.
The amount of attention that “Green” building and design has received lately has really made it seem that going green is a new concept. It has actually been around in some form or another since probably well before I was born, but in today’s world the items that were new back then are so commonplace these days that no one realizes just how important and green they are.
Renewable energy such as geothermal, wind and solar while getting larger headlines today has been around for over 2 decades. Iceland is poised to become the first country that does not use a single fossil fuel for its energy production or vehicle transportation. Turning an entire country over to renewables didn’t happen over night and has been slowly taking place for years. Elsewhere in Europe green roofs have become incredibly commonplace in Germany and wind farms have now moved offshore as opposed to being located on solid ground.
These green elements are only now gaining such interest in the US because of the increase in fuel prices. What has become commonplace in Europe is only now beginning to scratch the surface in the US. And things that have become commonplace in the US are often ignored because they’re not a 200 meter tall wind turbine that is easily noticeable.
How many people drive past a detention basin or retention pond and only see a water feature that is an aesthetic focal point for a property? They don’t even realize that detaining runoff and using sediment forebays helps a project to qualify for 2 LEED-NC credits and has a large impact on the water quality and quantity that eventually exits the site. They help to prevent runoff from further degrading the water system downstream of a development.
Using lighter colored materials for paving and roofing, native plant species that don’t require sprinklers and limiting the extent of new grading for a project are all ways of making a development more green and no one even realizes it. All of these types of practices are used everytime a new project is started here. I can remember the first ever engineering work I did was for a detention basin. This was before I had even started any of my engineering classes where I learned the what, where, when, why and how of environmental design. Once I did take those classes I was able to understand the full impact of a detention basin, but it is something that has been around awhile and no one gives second thought about.
Green planning and engineering is nothing new to MCLLC and has been occurring for years. This is partially because it is required by many review agencies, but it is also because it often makes sense from both a design perspective and for a client’s pocket book. A project may not have anything as noticeable as a wind turbine, but that doesn’t mean there are other elements to making the project green.
On July 20, 2009 the United States Green Building Council (USGBC) announced that they had received Platinum certification for their new headquarters under the new Version 3.0 requirements for Commercial Interiors (CI). Under these requirements the new building received credit for 94 credits out of a possible 110 total, far exceeding the required 80 credits necessary to achieve the Platinum rating. And of particular note was the compliance with all 11 Water Efficiency credits and 36/37 Energy and Atmosphere credits.
The LEED-CI section of design is interesting because it focuses on re-using what is existing and it can furthermore have an impact on occupied buildings. While most building owners/tenants will not try to achieve LEED-CI certification much can still be done to have a positive impact on the environment. Such small things as changing fluorescent light bulbs to energy efficient LED’s or other bulbs can not only save in the pockets of the users but consume less energy and thus reducing power demands which can lead to fewer green house gas emissions. While lighting is one of the simplest and most apparent ways to go Green for existing buildings there are countless others. These can include replacing old single non-insulated windows to save on heating and cooling costs, replacing regular toilets with low flow models to reduce water usage, or using paints and floorings that have low VOC counts to increase indoor air quality. The list goes on and on. While some of these are obviously more expensive to the owner than others, even the smallest change can have a large impact in the long run.
By not only using an existing building and thus reducing the use of raw land and virgin material, but also attaining such a high level of certification the USGBC has shown that they not only talk the talk but also walk the walk. In trying to do the same Midwestern Consulting has begun our own small Green practices of replacing light bulbs with energy efficient ones and re-using office supplies rather than purchasing brand new. While these may not seem to make a large impact if everyone in the world did the same the change would be noticeable.
To learn more about the new USGBC headquarters click here.
As part of the 2004 development of the Washtenaw County comprehensive plan, the County hired Creative Educational Solutions (a local non-profit) to develop a high school curriculum module about land use, public policy and regional sustainability. The result was reviewed in the August 2009 issue of “Planning and Zoning News”. The module grew into “Our Town: Sustainable Places, Green Spaces” and has been adapted for elementary through adult education classes. The intent is to “revitalize communities and invigorate learning through interdisciplinary place-based programs on land use, brownfield redevelopment and sustainable communities. Support equity with content that teaches it.” Per PZN, the intended result is to “develop a new generation of informed citizens while introducing students to academic and career pathways related to community revitalization and the ‘new’ Michigan economy.”
Taking the “Program Tours” on the website shows how “sustainability” is being integrated into education at all levels.
http://www.creativechange.net/programs/our_town
Their website includes on of the clearest definitions of “sustainability” I’ve found, and is as follows:
What Is Sustainability?
There is growing acknowledgement that forces such as population growth, consumption, and inappropriate “development” are combining to weaken the ecological systems on which all life depends. Although environmental fluctuations have occurred throughout history, changes generated by human activity may be altering ecological systems in ways that will be irreversible. An alternative future is “sustainable”, defined as lasting environmental health, economic prosperity, and social equity for current and future generations.
In a sustainable society, the regenerative capacity of the environment is maintained.
All people have the opportunity to live a fulfilling life within the earth’s capacity.
Democracy and justice are core values guiding people and institutions.
People live, work and communicate successfully in multiple cultural contexts.
Conflicts are resolved without violence.
Beauty and wonder are celebrated.
Achieving sustainability requires rethinking economic systems and cultural beliefs that equate “more” with “better”.
Creative Educational Solutions has some sustainability street credibility of its own as described in the section that describes their office practices which include a gray water recovery system, rain barrels and even an office worm bin to compost food scraps.
