34 Pa. Code § 301.7 – Risk to public health.

(a) If the Department determines that a hazardous substance or other chemical poses a potential health risk to the general public in an area surrounding the workplace, it will inform the nearest public health agency, hospital and fire company, and will submit to them copies of a relevant MSDS that it has in its possession.
(b) The criteria used by the Department in determining whether a hazardous substance or other chemical poses a potential health risk to the public include, but are not limited to the following:
1. (1) The nature and quantity of the hazardous substance or chemical present.
2. (2) The number of people who are being or may be exposed to the substances.
3. (3) The nature of the area surrounding the workplace.
4. (4) The nature, degree and type of risk posed by the substances to the general public.
(c) The Department will use the most effective method of informing the nearest public health agency, hospital and fire company of the potential risk of public health posed by a hazardous substance or other chemical.