## 5 Conclusions  
Geochemical exploration methods are useful when using total suspended particles (TSP) to detect hotspots of contaminants and their presumable emission sources in the sites with stevedoring operations. The sequential exploration methodology used in port city Klaipeda included: (a) sampling of TSP with original construction passive samplers as well as the characteristic dust of stevedored material, (b) elemental analysis of a large set (22) of analytes including so-called PHEs, crustal elements, and halogens determined by EDXRF with special sample preparation procedures, (c) multivariate statistical analysis (principal component and cluster analysis) of obtained XRF analysis data to reveal groups of syngenetic inter-correlated analytes, (d) search for reasons to explain temporal variability of geochemical composition of TSP during four monitoring periods, and (e) analysis of obtained analytical data using widely applicable geochemical indices and their mathematical treatment as well geochemical mapping. The conclusions are given below. The TSP in surroundings of iron ore open stevedoring is greatly enriched with Fe. The aureole of increased Fe contents is spreading from this site to the rest part of the city. Iron is accompanied by Cr. Besides, statistical tests and geochemical mapping of normalized enrichment factors show that As, Pb, S, Mn, Br, Cl, V, and Ni anomalies are also in the same area with these two elements. However, part of Cr can be enriched in TSP due to the input from the former pedogeochemical anomaly as a result of re-suspension from topsoil. In dust near this pedogeochemical anomaly, the contents of As and Pb are also increased. The TSP near stevedoring of phosphorite and apatite raw material and production from them is enriched with Sr and P. Part of Ca is also enriched in this TSP. The stevedoring of dolomite is accompanied by obvious TSP enrichment with Mg which is inevitably related with Ca. The TSP in the part of the city at greater distance from iron ore stevedoring is enriched in so-called crustal elements K, Ti, Rb, Al, Si, Zr, Ca, and Mg as a result of their re-suspension from topsoil. These elements mask the influence of stevedoring operations of KCl fertilizers, but insignificant input of K and Cl can be noticed via geochemical mapping of geochemical indices. The direction of the NW-W-SW winds contributes to enrichment of atmosphere not only with industrial long-range transport pollutants, but also with marine and those coming during stevedoring works. Therefore, local emission sources of S and halogens Br and Cl still remain questionable. Increased contents of these elements as well as Zn and other PHEs were determined in waste incineration plant ash. These elements, except Br, are listed in the application for permit for emissions of this company to the ambient air. The question about emission sources of Br is relevant due to lack of attention to this element: researchers discuss it in less than 20% of publications concerning TSP. Rather little attention (<50% of publications) is also payed to Si, Mg, P, Zr, as well as to As, Al, K, S, Sr, Rb, and Cl (<70% of publications). Both our and other research, e.g., the one performed in [82], demonstrate that when greater number of analytes is determined including the so-called crustal elements, the preliminary emission sources of pollutants can be more precisely revealed using multivariate statistical methods. It is noted that geochemical composition of TSP can be significantly variable in time due to both weather changes and other reasons, e.g., episodic stevedoring. TSP analysis in Klaipeda during four periods has revealed that such significantly variable analytes are Cl, S, Sr, Ni, Br, V, and Zn. Therefore, it is recommended to compare the contents of analytes in different sites only when sampling there is performed at the same time. Other circumstances which limit the comparability of data published by other researchers as well as lack of expedient information are also mentioned in the study.