Maryland. Repace (2005) measured outdoor fine particle and carcinogen concentrations from OTS on the campus of the University of Maryland at Baltimore. Using controlled experiments, Repace (2005) found that cigarette smoke RSP concentrations decline approximately inversely with distance downwind from the point source, whereas cigarette smoke carcinogen concentrations decline approximately inversely as the square of the distance from source to receptor. The experiments showed that OTS smoke levels did not approach background levels either for fine particles or carcinogens until about 23 feet from the source. Caribbean: Experiments conducted on a cruise ship underweigh at 20.
