Results of the study of the oily soils purification rate with the help of process washing fluids
The results of planning of the required quantity of sample probes in the process of oily soils clearance through the example of the comparative analysis results of processing of soils polluted by diesel fuel with process washing fluids have been presented. The technique for oily soils purification on the allotted experimental plots characterized by the same geometric dimensions and the same amount of oil and oil products has been described. The issue of ensuring the experiment results accuracy has been discussed, and the required number of experimental measurements concerning random errors variation coefficient has been substantiated based on the determining the necessary quantity of sample probes according to certain indices. They are: the oil pollution concentration in the soil after 40 min treatment by a solution under natural environment (t = 25 º C), the background concentration, the after-pollution concentration, the concentration after 20 min treatment by a solution while heating up to 60 º C, the concentration after 20 min treatment by a solution while heating up to 60 º C under natural environment (t = 25 º C). The elements of mathematical statistics were used as a basis of the technique for determining the necessary quantity of sample probes: the random variable mean value, the random errors variance, the random errors variation coefficient.