Figure 1. 63 balls used in the experiment. As can be seen, a broad range of manufacturers is represented. Figure 2. The setup of the experiment where polluting chemicals are washed out in two tests partly for nonorganic and partly for organic materials. The result Finally, we chose to have a so-called centrifuge test done (EN-12547-3), which is prescribed by the environmental agency for classifying waste. The analysis is not carried out on the actual ball but on the liquid it has been in for a period of time which matches the conditions when a ball lands in water. The analysis gave the following results. Parameter Analysis Government notice 921, 1996 regarding quality requirements for water areas (obsolete) µg/l µg/l Pb (lead) < 0,6 3,2 Cd (cadmium) < 0,05 5 Cr (chromium) < 0,9 10 Cu (copper) 2 12 Ni (nickel) 1 160 Zn (zinc) 38 110 As (arsenic) <1 4 Hydrocarbons <5 Benzene < 0,020 2 Toluene 1,8 10 Ethyl Benzene 0,086 10 Xylenes 0,17 10
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