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.
Maritime history of California
National Steel and Shipbuilding Company, commonly referred to as NASSCO, is a shipyard in San Diego, and a division of General Dynamics. It is located next to the San Diego Naval base. What became NASSCO was founded as a small machine shop called California Iron Works (CIW) in 1905. The machine shop and foundry were renamed National Iron Works (NIW) in 1922 and moved to the San Diego waterfront to build ships in 1944–1945. In 1949 NIW was renamed National Steel and Shipbuilding Corporation (NASSCO). The shipyard specializes in maintaining and constructing commercial cargo ships and auxiliary vessels such as minesweepers and LSTs, hospital ships, patrol craft, and cargo vessels for the US Navy and the Military Sealift Command. It is the largest new construction shipyard on the West Coast of the United States employing more than 4,600 people and is now the only major ship construction yard on the West Coast of the United States.