BOH Agenda 022620 - Laserfiche WebLink

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4. Investigation by down hole imaging is required of all repairs with a liner installation. A Comment[VH72]:A REQUIREMENT OF ULLY report from the well contractor of findings must be provided with the application. PVC CONTRACTORS TE A WHO INSTALL HE BEST PAIR INVESTIGATE AND PLAN FOR THE BEST REPAIR THAT pipe meeting NSF International Standards and rated at least Schedule 40 shall be PROTECTS THE GROUNDWATER AND THE WELL used for liner casing. The annular space around the liner casing shall be at least OWNER five-eighths inches wide or greater and shall be completely filled with neat cement grout or sand cement grout, in accordance with 15A NCAC 02C .0112of these Rules. All liner boots shall have at least 2 flanges and shall be installed in accordance with the manufacturer's instructions.The well liner shall be completely grouted within 10 working days after collection of water samples or completion of other testing to confirm proper placement of the liner or within 10 working days after the liner has been installed if no sampling or testing is performed. 5.Water supply wells with the well head terminating below ground (buried seal)shall be repaired by adding a section to the well casing extending at least 12 inches above land surface. The extension shall be made as follows: a)A sleeve shall be installed inside or outside of the casing and shall overlap at least three inches down the existing casing. The extension casing shall be welded to the existing casing around the outside of the joint; or b)A sleeve shall be heated and swaged over the existing casing with at least six inches of overlap;or c)An approved coupling meeting ASTM C-564 (Standard Specification for Rubber Gaskets for Cast Iron Soil Pipe and Fittings)and ASTM C1540 (Standard Specification for Heavy Duty Shielded Couplings Joining Hubless Cast Iron Soil Pipe and Fittings) may be utilized to extend the casing. Use of such a coupling requires prior approval of the OCHD. 6. Grout shall be placed around the casing, extending from land surface to a depth of at least one foot below the joint formed by the casings. The grout shall have a minimum thickness of six inches extending horizontally from the casing. Other repairs to the well, or replacement may be necessary in addition to extension of the well head. 7.Well rehabilitation by non-continuous chemical treatment shall be conducted using methods and materials approved by the Department based on a demonstration that the materials and methods used will not create a violation of groundwater standards in 15A NCAC 2L, nor otherwise do not render the groundwater unsuitable for its intended best usage after completion of the rehabilitation. History Note: Substitute for NCAC 02C.0112 Eff. July 1, 2008;Amended eff. October 23, 2009;March 25, 2020 B.ABANDONMENT OF WELLS 1.A well that is temporarily removed from service shall be temporarily abandoned in accordance with the following procedures: a)The well shall be sealed with a water-tight cap or well seal, as defined in G.S. 87-85(16), compatible with the casing and installed so that it cannot be removed without the use of hand tools or power tools. 38