Columbus 10th Street Superfund Site

(A) It shall be unlawful to operate or maintain any domestic water well within the Columbus Institutional Control Area, except as provided hereinafter. (B) Any existing drinking water well within the Columbus Institutional Control Area on the effective date of this subchapter may remain in use so long as the water, either at the wellhead, or after point of use treatment, meets the drinking water standards established by Title 179, Neb. Admin. Code, Ch. 2, § 002. (C) Any existing drinking water well within the Columbus Institutional Control Area shall be exempt from the requirement to connect to a public water supply main so long as the well is operable. At such time as replacement of such well is necessary or ownership of said property is sold, the property shall become subject to this section and the property owner shall make the application to the City for connection to the public water supply. (D) The City shall not issue a building permit for any new structure within the Columbus Institutional Control Area until it is satisfied that the water service to such structure will be connected to the public water supply.

The Property is subject to the following Activity and Use Limitations: (a) Extraction and use of groundwater underlying the Property, except for investigation or remediation approved by the Agencies, is prohibited. (b) Except where excavation is necessary to prevent or address a previously unknown threat to human health or the environment, any digging, drilling, excavating, constructing, earth moving, or other land disturbing activities that extend below the depth of the water table are prohibited without the prior written approval of the Agencies. The water table generally fluctuates between 13 and 18 feet below ground surface. (c) No structures capable of human occupancy (including residences, offices, or other workplaces, etc.) may be built on the Property without a properly designed and constructed vapor mitigation system approved by the Agencies that is designed to prevent airborne concentrations of volatile organic compounds within the structure from exceeding the applicable risk-based standards.

The Property is subject to the following Activity and Use Limitations: (a) Extraction and use of the groundwater underlying the Property, except for investigation or remediation approved by the Agencies, is prohibited. (b) Except where excavation is necessary to prevent or address a previously unknown threat to human health or the environment, any digging, drilling, excavating, constructing, earth moving, or other land disturbing activities that extend below the depth of the water table is prohibited without the prior written approval of the Agencies. The water table generally fluctuates between 12 and 16 feet below ground surface. (c) Structures capable of human occupancy (including residences, offices, or other workplaces, etc.) are prohibited on the Property without a properly designed and constructed vapor mitigation system approved by the Agencies that is designed to prevent airborne concentrations of volatile organic compounds within the structure from exceeding the applicable risk-based standards.

The Property is subject to the following Activity and Use Limitations: (a) Extraction and use of groundwater underlying the Property, except for investigation or remediation approved by the Agencies, is prohibited. (b) Except where excavation is necessary to prevent or address a previously unknown threat to human health or the environment, any digging, drilling, excavating, constructing, earth moving, or other land disturbing activities that extend below the depth of the water table are prohibited without the prior written approval of the Agencies. The water table generally fluctuates between 8 and 12 feet below ground surface. (c) No structures capable of human occupancy (including residences, offices, or other workplaces, etc.) may be built on the Property without a properly designed and constructed vapor mitigation system approved by the Agencies that is designed to prevent airborne concentrations of volatile organic compounds within the structure from exceeding the applicable risk-based standards. (d) Removal, alteration, or replace in kind of the existing monitoring wells, as shown on Attachment 1, or interference with reasonable access to these wells is prohibited without the prior written approval of the Agencies.