Versions of Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities on LawServer 2023 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2022 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2020 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2017 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2016 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2015 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2015 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2014 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2013 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities 2009 Rhode Island General Laws 42-17.4-1. Board of certification of operators of wastewater treatment facilities
