EPA says feds must clean Gowanus Canal, only 24-hour post office in city closing window … and more

1. Environmental Protection Agency says only the government has the money to clean up the Gowanus Canal [NYDN]
2. Park Slope residents want MTA to re-open two closed subway entrances [Brooklyn Paper]
3. Film and Broadway star Marsha Mason also owns organic farm in New Mexico [Post]
4. How to build a wall in your home [Post]
5. Marty Markowitz takes donations from companies who have benefited from his support of the Atlantic Yards project and cruise ship terminal in Red Hook, Brooklyn Paper says [Brooklyn Paper]
6. The only 24-hour post office in the city closing its 24-hour window [NYDN]
7. Foreclosure filings up in first quarter [Bloomberg]