Chemical or petroleum fuel underground storage tank systems regulated under 15A NCAC 02N with secondary containment 50 feet Chemical or petroleum fuel underground storage tank systems regulated under 15A NCAC 02N without secondary containment 100 feet Above ground or underground storage tanks contain petroleum fuels used for heating equipment, or furnaces, tanks used solely for storage of propane, natural gas, or liquefied petroleum gas 50 feet Land-based or subsurface waste storage or disposal systems 50 feet Gravesites 50 feet Any other potential sources of contamination 50 feet (7) Angled boreholes shall not be drilled in the direction of underground petroleum or chemical storage tanks unless it can be demonstrated to the satisfaction of the Director that doing so will not adversely affect human health or cause a violation of a groundwater quality standard as specified in Subchapter 02L. (8) The methods and materials used in construction shall not threaten the physical and mechanical integrity of the well during its lifetime and shall be compatible with the proposed injection activities. (9) Drilling fluids shall contain only potable water and may be comprised of one or more of the following: (A) the formation material encountered during drilling; (B) materials manufactured specifically for the purpose of borehole conditioning or well (10) (11) Bentonite grout shall not be used: (A) to seal zones of water with a chloride concentration of 1,500 milligrams per liter or greater as determined by tests conducted at the time of construction, or (B) in areas of the State subject to saltwater intrusion that may expose the grout to water with a chloride concentration of 1,500 milligrams per liter or greater at any time during the life of the well. (12) No additives that will accelerate the process of hydration shall be used in grout for thermoplastic well casing. (13) Grout shall be placed the entire length of the well boring from the bottom of the boring to land surface or, if completed below land surface, to the well header or manifold connection. (14) The shall be emplaced by one of the following methods: (A) Pressure. Grout shall be pumped or forced under pressure through the bottom of the casing until it fills the borehole or annular area space the casing and overflows at the surface;
Chemical or petroleum fuel underground storage tank systems regulated under 15A NCAC 02N with secondary containment 50 feet Chemical or petroleum fuel underground storage tank systems regulated under 15A NCAC 02N without secondary containment 100 feet Above ground or underground storage tanks contain petroleum fuels used for heating equipment, or furnaces, tanks used solely for storage of propane, natural gas, or liquefied petroleum gas 50 feet Land-based or subsurface waste storage or disposal systems 50 feet Gravesites 50 feet Any other potential sources of contamination 50 feet (7) Angled boreholes shall not be drilled in the direction of underground petroleum or chemical storage tanks unless it can be demonstrated to the satisfaction of the Director that doing so will not adversely affect human health or cause a violation of a groundwater quality standard as specified in Subchapter 02L. (8) The methods and materials used in construction shall not threaten the physical and mechanical integrity of the well during its lifetime and shall be compatible with the proposed injection activities. (9) Drilling fluids shall contain only potable water and may be comprised of one or more of the following: (A) the formation material encountered during drilling; (B) materials manufactured specifically for the purpose of borehole conditioning or well (10) (11) Bentonite grout shall not be used: (A) to seal zones of water with a chloride concentration of 1,500 milligrams per liter or greater as determined by tests conducted at the time of construction, or (B) in areas of the State subject to saltwater intrusion that may expose the grout to water with a chloride concentration of 1,500 milligrams per liter or greater at any time during the life of the well. (12) No additives that will accelerate the process of hydration shall be used in grout for thermoplastic well casing. (13) Grout shall be placed the entire length of the well boring from the bottom of the boring to land surface or, if completed below land surface, to the well header or manifold connection. (14) The shall be emplaced by one of the following methods: (A) Pressure. Grout shall be pumped or forced under pressure through the bottom of the casing until it fills the borehole or annular area space the casing and overflows at the surface;