Geotechnical engineer and I have been assigned

Hi, I’m a geotechnical engineer and I have been assigned to accumulate a number of soil samples in the storage area. But I’m afraid we’re running out of space. So I just want to know how long I should keep the soil samples before I get rid of them in order to save space.
In addition to that, I want to know how I should dispose the samples. I was told to give some of

Why are you asking this on a Qt dedicated forum?