Shipyard
Many studies have shown that painting is what generates almost half dangerous waste at a shipyard due to using high-pressure equipment to wash or remove any unwanted material that is on it like rust. Which will eventually make its way to the water and creates water pollution to the environment. Once these have compromised the surface of the hull the ship must go to the shipyard for maintenance. In a study in 2011 samples of sediments were collected from two sites in coastal marine area of Yongho Bay, one from the shipyard yard and the other 500m away. These results had analyzed that both samples contained metals that included Al, Fe, Li, V, Cr, Mn, Ni, Cu, Zn, As, Cd, Sn, and Pb. In addition, it had been confirmed that the concentration was higher in the first sample that was by the shipyard then the sample taking 500m away and was due to paint fragments applied to the steel ship hulls.
Seville Shipyard
Besides as a shipyard, the Crown used the Shipyard for other functions since its first centuries of operation. Because of their large size, they served to host assemblies and public celebrations. They were also a natural place to store the booty and the prisoners captured by the fleets of the Castilian kings. Sometimes they served as jails for the social elite, for example for the nobles related to the king Peter of Castile after the victory of his rival Henry II of Castile.