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.
Shipbuilding in the American colonies
While the demand for these ships were large, there were new ways needed to meet the demand with supply. There were many shipyards being built, and more and more materials were needed. In the beginning of the colonial period, people built their own boats for fishing and transportation. By the end of the 18th century though, there were many shipyards, and many of these had been passed down in families. Many of the ships were used for fishing and transporting small goods, but they were eventually used for trading of more goods, and also for passengers and transport.