In this process, the Terra company is kept where it is and then treated in such a way that it is no longer considered contaminated. According to the EPO, «treatment approaches may include: rinsing soil impurities with water, chemical solvents or air; destruction of impurities by incineration; encourage natural soil organisms to degrade them; or add material to the soil to encapsate impurities and prevent their spread. This practice note contains guidelines on rights to use and employment or mesne earnings and how and when double rent or double value can be claimed. A right to use and occupation is possible if there is land occupation without an explicit agreement, which published the first ten pollutant SLVs out of fifty-five for: arsenic, cadmium, chromium, lead, inorganic mercury, nickel, selenethylbenzene, phenol and toluene. SGV drawings for benzene, naphthalene and xylol have been created, but their publication is frozen. for each of these contaminants, as well as for benzo[a]pyrene, benzene, dioxins, furans and dioxin-like PCBs, naphthalene, vinyl chloride, 1,1,2,2 tetrachlorochlorethane and 1,1,1,2 tetrachlorochlorethane, 1,1,1,1 trichloroethane, tetrachlorethene, carbon tetrachlorochloride, trichlorothene and xylol have been published. The GVS for ethylbenzene, phenol and toluene depend on the organic matter content (SOM) in the soil (calculated from the total organic carbon (TOC) content). As a first estimate, SGV is considered appropriate for 1% of SOM. [Citation required] The effects occur on agricultural land that has certain types of soil contamination. Impurities usually alter plant metabolism and often lead to decreased crop yields. This has a side effect on soil protection, as languid plants cannot protect the soil from erosion. Some of these chemical impurities have long half-lives, and in other cases, the derived chemicals are formed by the decay of primary soil contamination. [Citation required] In the European Union, the Urban Waste Water Treatment Directive allows the spraying of sewage sludge on land.
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