The types of sampling techniques available for the purpose of collecting environmental samples. Types of sampling techniques include sampling stations, surface mining, drilling and vertical shaft sampling.
Surface sampling is a method used to collect information from the ground under the earth or soil surface by the use of a sampler’s wand. It can be done by hand or by machines. The machines are operated manually by digging the ground with a tool called a drill. After it is done, a sample is taken from the hole using the wand. This type of sampling may involve digging a hole or just removing surface soil to a laboratory for analysis.
Drilling is another method that is used to collect samples from the ground. Sampling from a well is an important part of drilling. The well must be drilled to obtain samples of the soil, water, air, air currents and other pollutants that may be present in the environment. These samples will be analyzed and studied later to determine the contaminants present in the area. Another important point of this type of sampling is the effect on the surrounding area because the contamination may spread through the soil and groundwater.
Vertical shaft sampling is an effective and efficient way to gather samples. This technique involves the drilling of a vertical shaft at high pressure in order to extract samples from the underground environment. The samples from the tunnel are collected into a special chamber and analyzed by means of radiation and x-ray. This technique can be used to study the effects of underground radiation.
Vertical shaft sampling is considered an effective method in which a portion of the system is being sampled. It is done by inserting a tube down into the core of the well and the sampler is able to take samples from the well interior as well as from the casing. There are disadvantages when doing vertical shaft sampling such as the settling of the sample from the core due to air and water pressure in the shaft.
As we all know that air sampling is the best for collecting air samples, and this is considered to be a very important sampling technique. When these samples are analyzed, it is possible to determine the quality of the air that is present in the environment.
Lastly, the underground mining technique is also widely used for environmental samples. While the surface mining may seem to be more expensive, the cost for drilling and the cost of its management becomes much lower when compared to the costs of the contaminated water. The mined area may be more expensive to the owner, but this should be compared to the costs of the contaminated water that the site has to deal with.
There are many types of sampling techniques available today. This is how most companies collect their samples.