Global statistics shows that the number of cars worldwide is increasing every year, leading to an increase in the number of worn-out tyres, for which efficient and safe recovering is a problem. There exists a variety of technologies that help get raw materials from recovering worn-out tyres or use them as a source of energy. Recovery of worn-out tires is an urgent necessity worldwide. In accordance with the European Union Directive 1999/31/EC, burial of refuse tyres is prohibited and as an alternative they would have to be recycled. On the one hand, the increasing pace of industrialization is causing ecological problems; while on the other, worn-out tyres are valuable raw materials. A case analysis study-assessment of environmental impact of the performance process of a tyre recovering plant in Lithuania (hereinafter-the object)-was performed. For the object assessment, qualitative and quantitative data acquired by experts during inspection were used. In the study, the authors assess and analyze the impact of potential technogenic risks of the object processes on the environment and population. The aim of the research is to perform risk identification, assess potential consequences and determine their amount. On the basis of the data acquired at the object the authors of the study find out what shortcomings exist in the process of recovering of worn-out tyres, what is the actual situation in the safety system at the object and what are the environmental consequences of emergency situations. The main hazards are caused by the risk of tyre fire, because such fire is very difficult to extinguish and harmful smoke is released as a result of combustion thus contaminating the atmosphere with substances harmful to the environment and human organism. Tyres are combustible material, additional hazards include ecotoxic effects. It was found that at 100-metre distance from the epicenter during fire of the tyre housing concentration was 1.07•10-7 %. Thus, dangerous consequences for people within 100 meters at the ground level are not associated with dangerous concentration of carbon monoxide.

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The deployment of potentially dangerous objects often results in criticism from urban dwellers around the world. Often these objects are not only in urban areas but also in rural areas. Accidents at such objects often lead to deteriorating living conditions, as well as to impossibility to use land and water resources, and uncontrollable environmental pollution. There are many different studies across the world in this area, but the situation in Latvia related to the management and prevention of technogenic risks has not been studied.The article considers particular qualities of high hazard objects' exploitation particular qualities in rural areas of Latvia. Management of technogenic risks is studied and assessed as an independent management system and its role is specified in the development of Latvian rural regions as well as the management risks are identified and possible harmful consequences for the inhabitants and environment. The present article reviews a situation how high hazard objects are exploited in Latvia, what management drawbacks are established and what are the possible solutions. The aim of the study is to show the link between the operational factors and environmental impacts of increased hazard sites, as well as to examine the management system, the prevention of existing hazards and to identify risks. The study results in the demonstration of identified situation and shortcomings in technogenic risk management system and their impact on the rural environment.

This article describes the situation with fire safety at Riga schools regarding their compliance with the fire safety requirements set in Latvia for accommodation of people in schools. The objective of the current paper was to research and evaluate the compliance with the requirements of regulatory enactments regarding the accommodation in Riga schools and analyse the actual fire safety situation during accommodation of participants of the Dance and Song Festivals in Riga schools. The research was conducted in spring of 2018, prior to the Dance and Song Festival, assessing the compliance of 60 accommodation sites with the Latvian regulatory enactments on fire safety. During the Dance and Song Festival, it was planned to organise accommodation places in schools for 24 000 persons – participants of the festival events in the city of Riga. Ensuring fire safety at public facilities is a topical issue for any country, since the fulfilment of fire safety requirements is important not only in cases, when school premises are intended to be used for temporary accommodation of participants of the Dance and Song Festivals for a period not exceeding a week, but also in cases when children have to stay in school premises every day to receive the knowledge they will need in their future lives and the fulfilment of fire safety regulations is an important condition for providing the overall safety.

Promocijas darbs veltīts ekonomisko un vides zaudējumu metodoloģijas izstrādei paaugstinātas bīstamības objektos. Efektīvas novērtēšanas metodes paaugstina drošības līmeni un palīdz sagatavoties iespējamajai avārijai, kas saistīta ar liela enerģijas krājuma nekontrolētu atbrīvošanos, kā arī prognozēt iespējamo zaudējumu apmēru avārijas gadījumā. Promocijas darbā veikta avārijas situāciju izraisošo apdraudējumu modelēšana un apkopota ārkārtējo situāciju statistika pasaulē. Autors izstrādājis lietderīgu, inovatīvu vides un ekonomisko zaudējumu aprēķina metodoloģiju, lai jebkurš interesents, neieguldot lielus laika resursus, varētu iegūt ticamu un pamatotu rezultātu. Darbā apkopotas arī pašreizējās riska novērtēšanas metodes un izvērtētas to nepilnības un priekšrocības, analizēta korelācija starp objektu nolietojumu un ārkārtas situāciju biežuma pieaugumu, izstrādāti priekšlikumi riska mazināšanai objekta ekspluatācijas periodā un piedāvāta iespējamās avārijas radīto zaudējumu novērtēšanas metodoloģija. Autora piedāvātās bīstamības novērtēšanas metodoloģijas pamatā ir probit funkcijas modelis, kas līdz šim Latvijā ir ļoti reti izmantots. Promocijas darbā probit modeļa konstantes pārbaudītas, aprēķinos izmantojot dažādus iespējamo avāriju scenārijus. Autora izstrādātās metodoloģijas algoritms ir inovatīvs, tajā ir seši pamatbloki: riska scenārija noteikšana; parametri, kas atkarīgi no paaugstinātas bīstamības objekta (turpmāk – PBO) apkārtnes un ārējiem meteoroloģiskajiem apstākļiem; iespējamie riska scenāriji un to varbūtības modelēšana; negatīvo seku uz vidi apzināšana; varbūtības aprēķināšana, izmantojot probit modeli; ekonomisko un vides zaudējumu novērtēšana. Piedāvātais blokshēmu izpildes algoritms ir cieši saistīts ar efektivitātes teoriju, kas paredz operāciju izpildes secīgumu un pamatota vadības lēmuma pieņemšanu saskaņā ar veikto procedūru, kurā tiek ņemti vērā dažāda veida dati. Izmantojot piedāvāto autora izstrādāto metodoloģiju, var gūt priekšstatu par riska līmeni attiecīgajā objektā un paredzēt iespējamos ekonomiskos videi radītos zaudējumus avārijas gadījumā. Piedāvāto metodoloģiju var izmantot gan objekta projektēšanas stadijā, gan esošos paaugstinātas bīstamības objektos. Promocijas darbā sniegts detalizēts aprēķina piemērs, ko var izmantot kā paraugu.