This takes on Episode 5: Gauntlet. After proceeding through the level you'll come to a small opening in the fence with two guards on the other side. The game will give you an optional objective of "Create a Distraction". Go into the house next to this fence, and make your way to the basement. Once in the basement, interact with the gas tank to "release gas", and interact with the bunsen burner to "light flame".
Now use the ladder to go to street level and push forward towards the objective. As you approach the street, the meth lab will explode, cause a distraction, and you will unlock the achievement.