The difference between porosity and permeability

 

Question #1
Discuss the importance of the 1970 amendments and the 1990 amendments to the Clean Air Act. When might an environmental consultant encounter these regulations at a site?
QUESTION 2
What is RCRA and what does it regulate? Describe the cradle to grave concept, and discuss how an environmental consultant might deal with RCRA on the job.

Unit #2
QUESTION 1
What is the difference between porosity and permeability? How do these characteristics of the subsurface affect the fate and transport of chemicals?
QUESTION 2
Explain the forces of retardation and attenuation in the subsurface.

Unit #3
Question #1
How are aerial maps, fire insurance maps, and street directories used to assess the potential for environmental contamination in a Phase I ESA?
Question #2
If you were conducting a Phase I ESA, how would the property type influence the areas of concern that you might be looking for? Provide an example of two types of properties (for example, a dry cleaner and an abandoned gas station), and point out three areas of concern you would look for at each type of property. You may use the example in this question or provide your own example.

Sample Solution

The difference between porosity and permeability

Porosity and permeability are related properties of any rock or loose sediment. Porosity is a measure of the void spaces in a material. Permeability is a measure of the ability of a material (such as rocks) to transmit fluids. Both are related to the number, size, and connections of openings in the rock. More specifically, porosity of a rock is a measure of its ability to hold a fluid. Mathematically, it is the open space in a rock divided by the total rock volume (solid and space). Permeability is a measure of the ease of flow of a fluid through a porous solid. A rock may be extremely porous, but if the pores are not connected, it will have no permeability. Likewise, a rock may have a few continuous cracks which allow ease of fluid flow, but when porosity is calculated, the rock doesn’t seem very porous.

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French sociologist Emile Durkheim defined collective conscience as a belief system of ideas held in common by average members of society. This dominant belief system provides basis of social order in any society. A purely economic component such as capitalism can function in very different ways depending on the collective conscience of a society. On the same note, something universally accepted as evil such as racism could also have a different meaning depending on the society’s collective conscience. The United States and Western Europe, both of which are high-income capitalist societies are stark examples of this. The social theories of Karl Marx and Durkheim mold the parameters of contemporary social policy and the welfare state in Europe. Pure, unregulated laissez-faire capitalism is generally accepted to be harmful to social welfare. This is because, “The primary goal of capitalist production is to produce commodities that are exchangeable at a profit”,which reads catastrophe. The major flaw of this system is that if society needs something useful which cannot be produced at a profit, it will not be produced under pure laissez-faire conditions. According to Marx, “They [people] create it [the market], yet claim it to be an independent force controlling their life”. He relates the market to God, both of which Marx claims to be manmade, yet often overpowering man himself. The United States on the other hand fetishizes capitalism. This is party because it is the only economic system that gives the government leeway to openly disenfranchise any group of people they want to exclude through coercion and consent. This seemingly “neutral” and Godlike market also works as an justification to the masses as to why African Americans are unable to succeed in a democratic society. The results produced by the European social democratic model magnifies the fact that the United States being a racial state intentionally chooses to stay away from egalitarianism.

Social policies are not modern concepts and have existed since the hunter-gather ages where the capable men would go out and gather essential goods which were distributed to all members of the society according to their need. European capitalism is the result of a long struggle between feudal traditionalism and the growing informal market system. While capitalism won the test of time, it was forced to incorporate many cultural influences of Catholicism which exercised a strong cultural influence in the economic system. In Europe, modern social insurance was introduced as early as 1883 by Bismarck to protect workers against sickness, old age and injury. Bismarck himself, a keen conservative created this program as conscious effort to counter the rising socialist movement at that time. The United States on the other hand has neither traditional feudal past nor challenges by

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