Opinion ID: 173200
Heading Depth: 3
Heading Rank: 1

Heading: The Risks of ADF

Text: ADF is mostly propylene glycol. When propylene glycol degrades in an anaerobic environment where sulfur is present, hydrogen-sulfide gas can be produced. Hydrogen sulfide has a characteristically offensive odor, which often accompanies sewage or rotten eggs. It can be smelled at very low concentrations in the air. Some people can detect it at one part per billion, and almost all recognize it at 300 parts per billion. Much higher levels, however, are required before it has recognized health effects. Eye irritation has been noted at between 5 and 30 parts per million  not billion; [m]arked eye and lung irritation occurs at 200 parts per million; and [b]reathing impairment and unconsciousness results at 1,000 parts per million. Bench Ruling at 12.