# Granular Material Development Applied in an Experimental Section for Civil Engineering Purposes
## 3 Results
### Experimental Section: \"Accumulated\" and \"Punctual\" Rainwater Leachates
Although the concentration in the \"punctual\" leachates is higher than in the \"accumulated\" samples after 556 percolation days, the concentrations of As in the \"accumulated\" leachates are similar to those in the E5 in the percolation column tests (L/S = 2). Besides, all the concentration results are below the inert limits established for L/S = 10 (0.5 mg\(\cdot\)kg\({}^{-1}\) for inert waste, 2 mg\(\cdot\)kg\({}^{-1}\) for non-hazardous waste, and 25 mg\(\cdot\)kg\({}^{-1}\) for hazardous waste). Figure 8b shows the Ba concentration, wherein the \"accumulated\" and the \"punctual\" samples are comparable, as the obtained concentrations demonstrated the same magnitude values. Nevertheless, the results in the experimental section after almost 2 years of percolation are lower than those obtained in the percolation column tests. Actually, the concentrations in the experimental section and in the percolation column tests are below the inert and non-hazardous limits established by the European Landfill Directive [29]. Figure 8c shows the results of the concentrations of the total Cr for the \"accumulated\" samples after 556 days of percolation, and the \"punctual\" samples after 548 days. Both results for the \"accumulated\" and \"punctual\" samples in terms of the total Cr analysis are equivalent. The results obtained in the experimental section, compared to E5 in the percolation column tests, show that the former results are higher. Nevertheless, in both cases, the concentration is 25 times lower than the non-hazardous limit in all the eluates studied, where the established threshold value is 10 ppm (10 mg\(\cdot\)kg\({}^{-1}\)). The Cu concentrations as determined by ICP-MS in both \"accumulated\" and \"punctual\" tanks are shown in Figure 8d. As can be observed, both the \"accumulated\" and \"punctual\" results are similar. All the obtained values are much lower than those obtained in E5 in the percolation column tests. Besides, all the values are below the non-hazardous limit established by the European Landfill Directive, of 50 ppm. Following the same procedure, in Figure 8e is presented the Hg concentration results for the \"accumulated\" and \"punctual\" leachates after 556 and 548 days of percolation, respectively. The \"punctual\" leachates' values are higher than the \"accumulated\" ones, and the \"accumulated\" and E5 results are comparable. Besides, all the values obtained are below the non-hazardous limit (0.2 ppm), although the behaviors of the leachates in both tanks are different. When studying the Mo element by means ICP-MS for the \"accumulated\" and \"punctual\" leachates (Figure 8f), it can be observed that the results obtained are comparable. Besides, all the values are very similar to those obtained in E5 in the percolation column tests, and all of them are below the non-hazardous limit (10 ppm). Besides, the Ni concentration in Figure 8g elucidates that \"accumulated\" leachates followed an irregular tendency, as did some other metal(loid)s. Therefore, the tendency between both types of samples is different. Despite the differences obtained for the \"accumulated\" and \"punctual\" leachates, the \"accumulated\" leachates are lower than E5, and the \"punctual\" ones are comparable with E5. Furthermore, all the samples are below the inert level. Although Ni concentrations would increase, exceeding the inert limit (0.4 ppm), they would still probably achieve values below the non-hazardous limit (10 ppm). Figure 8h shows the Pb concentration results, and all the analyzed leachates are quite similar, although the \"accumulated\" samples are more irregular than the \"punctual\" ones and the concentrations are below that of E5 in the percolation column test. Besides, the \"accumulated\" and \"punctual\" samples' results are below the non-hazardous limit (10 ppm). Finally, in Figure 8i is presented the Zn concentration values for the \"accumulated\" and \"punctual\" samples, which are comparable. In Figure 8 the R\({}^{2}\) values are shown, some of which are low.