# Assessing Crisis Management Tools for Sustainability of Industrial Safety
## 4 Model Situation
### Results of Models of Individual Scenarios  
Under the scenario of an extraordinary event of NH\({}_{3}\) leakage from the skating arena, an employee of the engine room was informed about the leakage of a dangerous substance by an SMS message from the monitoring system, about the \(H1\) warning level being exceeded in the engine room. Immediately after this notification, an emergency was declared and  
\begin{table}
\begin{tabular}{l l l l} \hline  & \(H1\) **Level** & \(H2\) **Level** & \(H3\) **Level** \\ \hline Ammonia & 40 mg.m\({}^{-3}\) & 80 mg.m\({}^{-3}\) & Above 120 mg.m\({}^{-3}\) \\ Concentration & (60 ppm) & (120 ppm) & (exceeds \(H2\) level) \\ \hline \multirow{2}{*}{System Status} & At least one sensor recorded an ammonia concentration of \(C\geq H1\) & At least one sensor recorded an ammonia concentration of \(C\geq H2\) & Emergency state triggered by sensors \\ \hline \multirow{4}{*}{Signal} & Optical signal activated; light beacon and fans started; notification of operating personnel (machinist and cooling plant manager) & As with \(H1\), plus acoustic signal (horn); automatic shutdown of compressors; notification of personnel (machinist and cooling plant manager) & Continuous alarm; immediate evacuation initiated; contact emergency services \\ \hline \multirow{4}{*}{Response Actions} & Implement initial ventilation protocols to disperse ammonia; assess need for evacuation based on proximity to the leak; monitor air quality for ammonia levels; provide personnel protective equipment (PPE) for personnel & Immediate evacuation of personnel from the affected area; initiate emergency response procedures, including contacting emergency services; provide medical assistance for potentially individuals; conduct atmospheric monitoring to assess ongoing risks; establish a secure perimeter to prevent unauthorised access and ensure public safety \\ \hline Duration of Signalling & For the entire duration of the defined state & For the entire duration of the defined state & Until emergency services declare the area safe \\ \hline \end{tabular}
\end{table}
Table 1: Information system for warning and notification in the event of an extraordinary event (accident) associated with NH\({}_{3}\) leakage.  
reported to the permanent service of the building, which reported the situation to the emergency line.  
The population was alerted through various mass media, but especially the city announcement system and the loud AsV Bavian siren, the sound of which lasted 2 min and had a fluctuating tone, which indicates a general threat. The next step was followed by a voice announcement informing the population about the ammonia leak, the amount of the leaked substance, the predetermined affected area, and how residents should proceed in this situation.  
An authorised employee conducted a survey in the engine room using a special chemical suit and autonomous breathing apparatus to determine the extent of the damage.  
To achieve the set goal and purpose of the study, it was planned to use ALOHA 5.4.7 software, which was used to simulate the leakage of a hazardous substance in the vicinity of the skating arena building.