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Archive for January, 2012

Environmental Statements – How to Address Contaminated Land Issues

Under the relevant European Directives, an Environmental Statement is the formal product of an Environmental Impact Assessment. Environmental Statements are often organised in a way that describes the environmental baseline, mitigation and effects for each type of environmental receptors: ecology, water resources, archaeological resources, human beings etcetera. Contaminated land is often managed in the same ways as the various environmental receptor groups, although it is principally a cause of impacts rather than a receptor. It also often refers to a pre-existing condition and its damaging effect is on a variety of different receptors such as human health, structures and buildings, surface water features, groundwater features and ecology. This often means that land contamination specialists struggle with integrating the issue in a logical manner in an Environmental Statement. Sticking to the structured approach of an environmental statement is essential to ensure a clear description of the existing environmental condition, the potential impacts and the actions taken to avoid, minimise, offset or manage the impacts. This article is based on UK practice and legislation, although fundamentally the issues should be similar within other contexts.

Contaminated land is in many countries considered on a source-pathway-receptor basis. This is important to understand the impact land development can have on the issue of contaminated land. Development can interfere with any of these three elements. It can introduce sensitive receptors by changing the use of land, for instance by building new residential units on a site that was previously used for heavy industry. New pathways linking pre-existing contamination with an existing receptor can be formed, for instance when piling through a non-permeable layer connecting a layer of contaminated soils with a deep aquifer. Finally by introducing pollutants on the site a development project can introduce a potential source of contamination.

The second element to consider is the structured approach of an environmental statement. Apart from the introductory and procedural elements described in the environmental statement, a good environmental statement comprised the following sections:

• environmental baseline conditions
• potential environmental impacts
• mitigating measures
• residual environmental impacts

There should be a logical relation between the different sections. Any receptor that is affected and described in the section about the potential impacts and effects should have been introduced in the section describing the baseline. Any material impact should be assigned a mitigation or management action etc. Implementing this structure allows a clear description and understanding of the environmental impacts and the way it will be managed.

Applying these principles to contaminated land will result in a baseline condition section that describes the current sensitive receptors that are present within the potential sphere of influence of the development, the sensitivity and importance of these receptors, the presence of any pre-existing contamination and the presence of actual and potential pathways. The next section, potential environmental impacts or effects, first considers the impacts that the development will have in terms of the introduction (or removal) of sensitive receptors and the creation of new pathways between existing and potential pollution sources and receptors. In addition this section will describe the potential environmental impacts that are associated with the introduction of new sources of contamination. In the third section, mitigating measures, a description of the actions to mitigate each of the impacts that may occur should be provided. Finally a statement of the residual impact of the development is provided in the last section: residual environmental impacts.

Paul Giesberg is an environmental consultant with a special interest in environmental impact assessment and sustainability in land use development.

Can You Be Clean, Green, and Legal?

You may have seen something on the news about Spokane, Washington where there is now a ban on dishwasher detergent made with phosphates. While this may seem to be an isolated case, there are actually several states (including the rest of the state of Washington) that will make dishwashing soap made with phosphates above a very small level illegal in 2010.

What is phosphate anyway and why is it used in dish washing soap?  Phosphate is an inorganic chemical that is a combination of salt and phosphoric acid.  Because it can clean things like hard water stains, and grease, phosphates are used in all kinds of things including dish washing soap. 

Why all the fuss?  Phosphate is a problem when it finds its way to freshwater rivers and lakes.  The phosphate encouraged the growth of algae which depletes the oxygen in these rivers and lakes, killing off fish and other wildlife. 

While there are green alternatives out there, deleting the phosphates from the dish washing soap can leave one unsatisfied with the resulting product-and a lot of dirty dishes.  Plus some of these green alternatives are pricier than their cheaper phosphorous counterparts.  This has caused people to travel outside their state to obtain contraband detergent from other states-which, of course, defeats the purpose of the bank in the first place. 

What should you look for in a green dish washing soap?  Are there green products that work as well?  While there is no direct substitute for phosphorous, but there are other substances that can be used.  How well they will work depends on a number of factors, perhaps the most important being the hardness of the water used for cleaning.

One ingredient that be used is a surfactants.  Surfactants are usually biodegradable and are used to provide cleaning power and increase the ability of the water to separate the soil from the dish. Anionic surfactants work well as detergents, but can be less than effective in hard water. Amphoteric surfactants are used for their foaming power and can often be found with anionic surfactants. There are other substitutes for phosphates, but these can be even more dangerous than the phosphates. They include nitrilotriacatic acid (NTA) and caustic alkaline chemicals (which are particularly dangerous when ingested-as sometimes happens with children).

It may take some trial and error to come up with the phosphate substitute that works best in your water.  It is unlikely that the ban on phosphates is going away, so it is better to start exploring the options now.  In the meantime, the soap manufacturers continue work on the perfect phosphate substitute, but there are some excellent alternatives out there.

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Technology Environment News 12-14-07 of Dekalb Academy

Activated Carbon Odor Combatant

There are many stinky things in the world today. From the bathroom to the kitchen there are things in everyday life that can cause a nose to curl. However, activated carbon can quickly eliminate odors in the home, office, or commercial building. While many products simply mask odors or cover them up, activated carbon can absorb the odor and eliminate it once and for all. There are many ways that activated carbon can be used within a building to remove odor. Whether the smell is a permanent or occasional odor, activated carbon can be used to eliminate it.

Air Filtration Systems

An air filtration system can be placed on the air supply to any building to help eliminate the odors in the building. If there is a central heat and air system in the building the air filtration system can be used in the circulation process. A free standing air purification system can also be used in bathrooms that are used by numerous employees. These systems are much more effective than other means of removing odors.

Odor Blocking Masks

For those who work or play in environments that are not appealing to their noses there are activated charcoal masks that can be worn. These masks work to block the smells from reaching the nose. As the smell passes through the mask it is sucked up against the carbon and held there, eliminating the smell. These masks are perfect for those who work with garbage, waste, or cleaning products.

Flatulence Elimination pads and Inserts

Flatulence is a problem for many people today. Because of a fast paced environment and fast food restraints many people experience this condition. Luckily, there are now flatulence pads that can be used to eliminate the odor that accompanies flatulence. These pads can be placed in a chair for those in an office. However, there are also flatulence pads that can be placed inside the undergarment to eliminate odors.

Odor Eliminators for Pets

Activated charcoal can also be used to eliminate the odor that accompanies pet ownership. There are many smells that can come from litter boxes, accidents on the floor, and messes made in the yard. However, activated carbon can be made in the form of a powder. This powder can be sprinkled into the litter box, on the carpet, or in the yard outside. For use on the carpet in can be sprinkled on and then vacuumed up However, in other places it can be left to continue working. It is perfectly safe to use around pets and will not cause any harm if they ingest it.

There are many uses fro activated carbon today. It is an excellent odor eliminator. While these are many of the uses for eliminating odors there are many more. Anywhere there is a smell or odor; activated carbon can be used to eliminate it. This product is a green option for cleaning, absorbing, and eliminating odor. Activated carbon also has many other uses including purification, detoxification and moisture absorption.

Carbon Resources Management Team has over 70 years of experience in the Activated Carbon and Activated Charcoal carbons industry. Our Sabre series® activated carbon products are the most diverse line of activated carbon products on the market.

Article Source: http://EzineArticles.com/?expert=Kim_Walsh

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