Original sentence: An abandoned third track sits next to the southbound platform and this area once held Nassau Smelting & Refining Company, (a subsidiary of Bell System's Western Electric division, which recycled copper from obsolete telephone equipment), for which the station was originally named.The factory site was a vacant brownfield, until 2007, when the land was cleaned and is now environmentally safe for future development
Edited sentence: An abandoned siding sits next to the southbound platform, which used to serve the Nassau Smelting & Refining Company, for which the station was originally named.As a subsidiary of Bell System's Western Electric division, the factory recycled obsolete telephone equipment and manufactured copper wire and solder.For more than 20 years the site was a vacant brownfield, until 2007, when the land was cleaned up and is now environmentally safe for future development.The factory opened in 1882 as the Tottenville Copper Works and changed its name in 1931 to the Nassau Smelting & Refining Company