**Acknowledgements**

The authors wish to thank Marek Gubernat (Municipal Services Office in Ostrów) and Henryk Stolarczyk (Municipal Services Office in Ostrów) for supplying data on the MSWM in Ostrów. Relevant figures are reprinted with given sources. This publication and research was funded from subvention for the maintenance and development of research potential granted to AGH University of Science and Technology, Management Department, Kraków, Poland.
