Versions of Washington Code > Chapter 70A.226 - Municipal sewage sludge--Biosolids on LawServer 2023 Washington Code > Chapter 70A.226 – Municipal sewage sludge–Biosolids 2022 Washington Code > Chapter 70A.226 – Municipal sewage sludge—Biosolids. 2020 Washington Code > Chapter 70A.226 – Municipal sewage sludge—Biosolids.
