2023 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2022 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2020 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2019 Washington Code 90.52.040

2018 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2016 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2015 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2014 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2013 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state

2009 Washington Code 90.52.040 – Wastes to be provided with available methods of treatment prior to discharge into waters of the state