These graphs show the relationship between the total area in hectares of currently licensed aggregate operations (up to 2009), the portion of the license that is presently 'disturbed' or under extraction, and the area being rehabilitated. As can be seen from the top graph, each year there is a large increase in licensed areas available for future extraction, with a much smaller amount becoming 'disturbed' or actively extracted. The lower graph shows a comparison between newly disturbed areas and newly rehabilitated areas. The rehabilitation is not keeping pace with extraction. This is why we must ask why more extraction is needed, especially on the Niagara Escarpment.
PitSense believes that we must re-evaluate society's relationships between our
aggregate industries, our aggregate users, our environment, and ordinary citizens
who currently suffer the harmful consequences without adequate compensation.
We must create a better balance between all stakeholders.
You can't keep doing the same thing and expect different results.
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R E H A B I L I T A T I O N / R E C Y C L I N G
Our awakened environmental concerns and our new awareness of the costs, both social and economic, of the traditional relationship between the Aggregate Industries and society require us to do some fundamental re-thinking. Pitsense believes that REHABILITATION of PITS and QUARRIES is an important but too-often-neglected part of an aggregate operator's responsibilities.
Examples of effective rehabilitation do exist. The aggregate industry points to these with pride, but they also acknowledge that these occur only after 40 or 50 years of extraction. Moreen Miller of the Ontario Stone Sand and Gravel Association (OSSGA) spoke about the issue and how we must "stick it out for the long term". Unfortunately this means, for many of us, that we will suffer the negative effects for the rest of our lives and then maybe someday those who follow us will benefit from rehabilitation.
As Bob Dylan once said: "The Times They Are A-Changing".
We at PitSense heartily endorse increased usage of recycled materials for infrastructure improvements and construction projects. We also believe there are many examples around the world that can guide our implementation of increased usage. One good example is in the Netherlands where Kleemann has built a turnkey recycling plant. Europe’s largest recycling plant is located in the vicinity of Amsterdam’s Schiphol Airport. This plant was designed and built by Kleemann for processing demolition waste, demolished concrete and asphalt into high-quality aggregate for the construction industry. It includes, among other units, Kleemann’s largest impact crusher model SHB 20/160. The recycling plant has a feed capacity of up to 700 tons of material per hour. One year of planning, construction and assembly was needed before the new recycling plant was put into operation. To protect the environment from dust and noise, the entire plant was subsequently enclosed with a trapezoidal panel construction.
We oppose the scattered approach pursued by the aggregate operators in Ontario who want to locate limited capacity recycling operations in a wide variety of locations, many of which are in rural residential and/or environmentally sensitive areas. This approach does not take advantage of the significant economies of scale inherent in the Netherlands example. It also becomes far more difficult or impossible to obtain a consistent product and effective monitoring of the processes.
A U.S. study indicates that in order to
realize economies of scale, a plant should
process at least 110 – 275 tons of debris per hour, and in order to produce a reasonable
return on investment, the plant should process and sell no less than 200,000 tons of recycled aggregate per year. This implies that urban areas of at least 1 million people are needed to support the operation of a concrete recycling plant. There are no reasons to believe that this requirement would be substantially different in Ontario.
If we want to ensure the maximum utilization of recycled materials we must process the material in the most effective, economical, and socially responsible manner possible. Large scale operations, appropriately located, are an excellent way to proceed.
Increasingly, on-site or at-source recycling is favored because it reduces haulage expenses and hazards. Transport to and from a central facility is avoided, particularly where the product is re-used in the re-development occurring at the same site. Both Mobile and Portable recycling plants are utilized, depending on the volumes to be processed.
This approach is superior to what is being proposed by Ontario pit and quarry operators, where we would have numerous limited-capacity plants requiring haulage of unprocessed debris from demolition sites, and storage of contaminated materials in or near sensitive environmental areas not suited to Class III industrial activities.
Watch video HERE Portable Recycling Plant >>>