What is ISO 22282-4-Pumping tests for geotechnical investigation about?  
ISO 22282-4 is the fourth part of a multi-series of documents that is applicable to geotechnical investigation and testing on geohydraulic testing. 
ISO 22282-4 establishes requirements for pumping tests as part of geotechnical investigation service in accordance with EN 19971 and EN 19972.
ISO 22282-4 applies to pumping tests performed on aquifers whose permeability is such that pumping from a well can create a lowering of the piezometric head within hours or days depending on the ground conditions and the purpose.   
The tests concerned by ISO 22282-4 are those intended for evaluating the hydrodynamic parameters of an aquifer and well parameters such as: 
- Permeability of the aquifer
- Radius of influence of the pumping 
- Pumping rate of a well 
- Response of drawdown in an aquifer during pumping 
- Skin effect 
- Well storage, 
- Response of recovery in an aquifer after pumping 
Note: It covers pumping tests carried out in soils and rock
Who is ISO 22282-4- Pumping tests for geotechnical investigation for? 
ISO 22282-4 on geohydraulic pumping tests is useful for:  
- Hydrogeologists
- Civil engineers      
- Geotechnical engineers 
- Technical consultants  
- Contractors 
Why should you use ISO 22282-4- Pumping tests for geotechnical investigation? 
Geotechnical testing is carried out by geotechnical engineers, geotechnical technicians, or engineering geologists to determine the features of a worksite, such as the physical attributes. Geotechnical studies are conducted to assess the geology, seismologic, and soil conditions that affect the project's safety, cost-effectiveness, design, and execution. 
The test described under ISO 22282-4 is to determine and access rules and regulations on geotechnical testing services. The test entails measuring the pumped discharge as well as the water level in the test well and piezometers as a function of time before, during, and after pumping. Pumping from a well to lower the piezometric surface of the groundwater. 
Pumping tests as part of geotechnical investigation and testing when governed by ISO 22282-4, can assist you in making better decisions about the project's safety, cost-effectiveness, design, and implementation.  
You can view the latest version of this standard here.
