US lawWashingtonRegulationsTitle 173 — ECOLOGY, DEPARTMENT OFChapter 173-405 — KRAFT PULPING MILLS173-405-091WAC 173-405-091WAC 173-405-091. Special studiesLast amended: 1991Year: 2026Length: 19 wordsOfficial source Ecology may require such additional special studies relevant to process emissions and establish completion dates as it determines necessary.PreviousWAC 173-405-087