2023 Washington Code 90.48.531 – Leaching tests — Identification — Report to the legislature

2022 Washington Code 90.48.531 – Leaching tests–Identification–Report to the legislature

2020 Washington Code 90.48.531 – Leaching tests — Identification — Report to the legislature

2019 Washington Code 90.48.531

2018 Washington Code 90.48.531 – Leaching tests — Identification — Report to the legislature

2016 Washington Code 90.48.531 – Leaching tests–Identification–Report to the legislature

2015 Washington Code 90.48.531 – Leaching tests–Identification–Report to the legislature

2014 Washington Code 90.48.531 – Leaching tests — Identification — Report to the legislature

2013 Washington Code 90.48.531 – Leaching tests — Identification — Report to the legislature

2009 Washington Code 90.48.531 – Leaching tests — Identification — Report to the legislature