OAR 690-210-0065: Hydrofracturing

(1) If the water supply well is hydrofractured, the constructor shall so note on the well report. Information reported shall include methods and materials used, maximum pressure exerted on the formation, location of packers, initial and final static water level figures, as well as initial and final yield figures. (2) In no case shall hydrofracturing allow commingling of waters within the well bore. (3) The well shall not be hydrofractured within 20 feet of the bottom of the existing well casing. (4) Clean sand or other materials (propping agents) approved by the Department may be injected into the well to hold the fractures open when the pressure is removed. (5) All tools and propping agents shall be disinfected prior to placement into the well.