US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 12 — Department of Environmental Quality - Underground Storage TanksR18-12-901R18-12-901R18-12-901. ExpiredExpiredLast amended: 2017Length: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-12-901R18-12-901. ExpiredPreviousR18-12-809NextR18-12-902