H.Amdt.677 - An amendment numbered 6 printd in Part C of House Report 114-216 to allow the Administrator of the Environmental Protection Agency to prevent the legislation from going into effect if it is determined to have a negative impact on vulnerable populations. Vulnerable populations include infants, children, adolescents, pregnant women, the elderly, individuals with preexisting medical conditions, individuals who work at coal combustion residuals treatment or disposal facilities, members of any other appropriate population identified by the Administrator based on consideration of socioeconomic status, racial or ethnic background, or other similar factors identified by the Administrator.