Distinguishable from background means that the detectable concentration of a radionuclide is statistically different from the background concentration of that radionuclide in the vicinity of the site or, in the case of structures, in similar materials using adequate measurement technology, survey, and statistical techniques.
Distribution System Code means the code approved by the Board which, among other things, establishes the obligations of the distributor with respect to the services and terms of service to be offered to customers and retailers and provides minimum, technical operating standards of distribution systems;
small and medium-sized enterprise or 'SME' means a micro, small or medium-sized enterprise within the meaning of the Annex to Commission Recommendation 2003/361/EC43;
small and medium-sized enterprises or ‘SMEs’ means small and medium-sized enterprises as defined in Article 2 of the Annex to Commission Recommendation 2003/361/EC;
Periodically regenerating system means an exhaust emissions control device (e.g. catalytic converter, particulate trap) that requires a periodical regeneration