Proposed legislation this week at the Philadelphia City Council intends to ban the use and production of hydrofluoric acid (HF). The city is in favor of the ban after the Philadelphia Energy Solutions facility explosion that resulted in a release of 5,000 pounds of the toxic chemical. At low levels of exposure, HF can cause irritation to the eyes, nose and respiratory system. Exposure to higher levels can lead to more severe health concerns to the heart and lungs. Philadelphia mayor Jim Kenney is encouraging other states and the federal government to enforce similar restrictions on the chemical. Read More.