US lawOregonRegulationsChapter 632 — Department of Geology and Mineral IndustriesDivision 10 — OIL AND GAS RULES632-010-0168OAR 632-010-0168OAR 632-010-0168. Use of Earthen ReservoirsLast amended: 2013Length: 14 wordsOfficial source Oil may not be stored or retained in earthen reservoirs or in open receptacles.PreviousOAR 632-010-0167NextOAR 632-010-0170