US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 12 — Department of Environmental Quality - Underground Storage TanksR18-12-304R18-12-304R18-12-304. ReservedReservedLength: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-12-304R18-12-304. ReservedPreviousR18-12-303NextR18-12-305