sum of $37 billion including assumed debt. The sale was finalized on January 29, 2016, on which date Berkshire Hathaway took ownership of Precision Castparts. In 2021, Berkshire Hathaway took an almost $11 billion writedown on the investment. Environment In May 2011, toxic chemicals such as nitrogen dioxide and hydrochloric acid were unexpectedly released at the company's titanium plant on Johnson Creek Blvd, Portland, Oregon. Although four people were hospitalized, nobody was permanently injured from the fumes. Firefighters had difficulty shutting down the plant. The Toxic 100 Air polluters index from the University of Massachusetts listed Precision Castparts as the number one air polluter in the U.S. in the August 2013 edition, which the company called a flawed study. Financials *In millions of US dollars.2007 SEC 10-K Form, page 26. Precision Castparts. Retrieved on May 28, 2008 Listed on the New York Stock Exchange as PCP, the company was part of the S&P 400. In 2007, Precision was moved to the S&P 500 stock index. As seen in the table above, PCP's revenue increased by 52 percent in 2007, to $5.4 billion from $3.5 billion in 2006. Total debt increased by 29 percent, from $677 million in 2006 to $873 million in 2007. The increases in revenue and debt were due in part to a pair of acquisitions in February 2007: GSC Foundries, Inc. (GSC), formerly a competitor to PCP in producing aluminum and steel structural investment castings, and Cherry Aerospace LLC (Cherry), a manufacturer of aerospace blind rivets and blind bolts. Products The company manufactures a variety of parts for the aerospace industry including many jet engine components. PCC also makes medical prostheses and parts for other industrial applications such as in the oil industry, in the gas industry, and for use in power generating turbines for producing electricity. They are considered a leader in the manufacturing of both jet engine airfoils and gas turbines used for generating electricity. The company generates $1.5 million in revenue for each Boeing 787 Dreamliner built. Other products made from the various metals are fasteners, products for the paper industry, parts used in the defense industry, and parts for the automotive industry. PCC's main markets are the United States, Europe, and Asia. Investment cast The investment casting segment of Precision Castparts includes PCC Structurals and PCC Airfoils. It manufactures castings for aircraft engines, industrial gas turbine engines, airframes, medical implants, armament, unmanned aerial