US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-62 — GENERAL OCCUPATIONAL HEALTH STANDARDS296-62-13615WAC 296-62-13615WAC 296-62-13615. Adequate systemLast amended: 2019Year: 2026Length: 19 wordsOfficial source Adequate ventilation systems must be installed as needed to control concentrations of airborne contaminants below applicable threshold limit values.PreviousWAC 296-62-13610NextWAC 296-62-13620