US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 12 — Department of Environmental Quality - Underground Storage TanksR18-12-228R18-12-228R18-12-228. ReservedReservedLength: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-12-228R18-12-228. ReservedPreviousR18-12-227NextR18-12-229