11 | Dirty Jobs - Season

: This episode involved spraying polyurea to rehabilitate manholes and restoring a historic clock tower in Washington, D.C.. The "Why" Behind the Dirt Dirty Jobs - Discovery GO

: Mike cleaned an asphalt filtration house and learned the process of pyrolyzing wood into fertilizer. Dirty Jobs - Season 11

The season featured a mix of unique and gritty occupations, ranging from wildlife management to specialized industrial maintenance. : This episode involved spraying polyurea to rehabilitate