OAR 690-215-0030: Casing and Casing Extensions

(1) All well casing used to extend a well head above land surface or used in the alteration, repair or deepening of water supply wells shall meet the minimum standards in OAR 690-210. (2) The annular space surrounding the well casing used to extend the well head shall be sealed as required by OAR 690-210 and shall be at least four inches greater than the nominal inside diameter of the permanent well casing. NOTE: Prior to extending the casing on public, community, municipal, or public utility water supply wells, contact the Department of Human Services. Additional requirements may apply.