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| norms of environment quality (ABelonogov) | |||
| environmental quality standards; standards of environmental quality | |||
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| Environmental Quality Regulations (Валерия 555) | |||
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environmental quality standard (An Environmental Quality Standard is a value, generally defined by regulation, which specifies the maximum permissible concentration of a potentially hazardous chemical in an environmental sample, generally of air or water. (Sometimes also known as an ambient standard.)  ox.ac.uk Alexander Demidov) | |||