The BEVI defines the term individual location related risk as the chance that a
unprotected person who remains continuously in one certain space dies as a direct
consequence of an accident in which dangerous substances are involved. By determing
this number, a acceptable level of minimum protection can be realised for individuals.

The BEVI also dictates the calculation of the term group related risk, which describes the chance that a
group of persons of a certain size (for example 10, 100 or 1000 persons) are at the same time victim of a
accident in which dangerous substances are involved.

The BEVI is based on the WM and the Environmental Planning Law (Dutch: Wet op de Ruimtelijke Ordening (Wro)). The Wro regulates how environmental plans come about and which governing bodies are responsible for these plans. The BEVI points out categories of institutions that are obligated to appoint safety distances.

To apply the BEVI in a specific situation the REVI is available. REVI stands for ‘Regeling Externe Veiligheid Inrichtingen’ and contains complementary and extensional rules to interpretate and implementate the BEVI.

To determine the external safety risks of a institution in which dangerous substances are used, SAFETY-NL can be used. SAFETY-NL offers a mathematical package which offers the ability to calculate safety distances. The results that SAFETY-NL brings forth determine if an institution meets with the standards the BEVI prescribes.

HSE-advies is represented by experts which have a wide an diverging knowledge of the BRZO. Also HSE-advies is in possession of a user license for the use of SAFETY-NL.