II 116th CONGRESS 1st Session S. 2525 IN THE SENATE OF THE UNITED STATES September 19, 2019 Mrs. Shaheen (for herself and Mr. Gardner ) introduced the following bill; which was read twice and referred to the Committee on Commerce, Science, and Transportation A BILL To require the Director of the National Institute of Standards and Technology to conduct a study of personal protective equipment worn by firefighters to determine the prevalence and concentration of per- and polyfluoroalkyl substances, and for other purposes.