If the members of the four delimited categories are counted as separate chemicals, the TRI Program covers 690 chemicals and chemical categories (i.e., 595 + 27 + 68). Note: methyl mercaptan and 2,2-dibromo-3-nitrilopropionamide are under administrative stays and are not currently reportable.
1 Open all the doors and windows.  2 You want to make sure you ventilate the house, Altman said. 3  If you suddenly notice your grass or shrubs have changed color, looking more brown or rusty, that could be a sign of a leak: the gas pouring out of the pipes.
Signs of a gas leak include: 1  A sulfur or rotten egg smell. 2  A hissing, whistling or blowing sound near gas appliances or pipes. 3  Dead, dry or discolored grass and vegetation near the gas line.  Dirt or water being blown into the air near a gas 1  line. An exposed pipeline after a natural disaster such as a flood or earthquake.