Wyoming Administrative Code › Agency 020 - Environmental Quality, Dept. of › Sub-Agency 0011 - Water Quality › Chapter 15 - USE OF SURFACE DISPOSAL OF BIOSOLIDS, APP. A-C › Part C - SURFACE DISPOSAL › Section 24 - Management practices

Current through July 13, 2024
(a) Under the
				  provisions of 40 CFR Part 503, the United State Environmental Protection Agency
				  is authorized to ensure that bulk biosolids shall not be applied to the land if
				  it is likely to adversely affect a threatened or endangered species listed
				  under Section 4 of the Endangered Species Act or its designated critical
				  habitat. No similar authority is provided to the Water Quality Division,
				  Department of Environmental Quality.
(b) An active biosolids unit shall not
				  restrict the flow of a base flood (i.e., a flood with a magnitude equaled once
				  in 100 years).
(c) When a surface
				  disposal site is located in a seismic impact zone, an active biosolids unit
				  shall be designed to withstand the maximum recorded horizontal ground level
				  acceleration.
(d) An active
				  biosolids unit shall be located 60 meters or more from a fault that has
				  displacement in Holocene time, unless otherwise specified by the permitting
				  authority.
(e) An active biosolids
				  unit shall not be located in an unstable area.
(f) An active biosolids unit shall not be
				  located in a wetland, except as provided in a permit issued pursuant to Chapter
				  2, Wyoming Water Quality Rules and Regulations.
(g) Run-off from an active biosolids unit
				  shall be collected and shall be disposed in accordance with National Pollutant
				  Discharge Elimination System permit requirements and any other applicable
				  requirements.
(h) The run-off
				  collection system for an active biosolids unit shall have the capacity to
				  handle run-off from a 24-hour, 25-year storm event.
(i) The leachate collection system for an
				  active biosolids unit that has a liner and leachate collection system shall be
				  operated and maintained during the period the biosolids unit is active and for
				  three years after the biosolids unit closes.
(j) Leachate from an active biosolids unit
				  that has a liner and leachate collection system shall be collected and shall be
				  disposed in accordance with the applicable requirements during the period the
				  biosolids unit is active and for three years after the biosolids unit
				  closes.
(k) When a cover is placed
				  on an active biosolids unit, the concentration of methane gas in air in any
				  structure within the surface disposal site shall not exceed 25% of the lower
				  explosive limit for methane gas during the period that the biosolids unit is
				  active and the concentration of methane gas in air at the property line of the
				  surface disposal site shall not exceed the lower explosive limit for methane
				  gas during the period that the biosolids unit is active.
(l) When a final cover is placed on a
				  biosolids unit at closure, the concentration of methane gas in the air in any
				  structure within the surface disposal site shall not exceed 25% of the lower
				  explosive limit for methane gas for three years after the biosolids unit closes
				  and the concentration of methane gas in the air at the property line of the
				  surface disposal site shall not exceed the lower explosive limit for methane
				  gas for three years after the biosolids unit closes, unless otherwise specified
				  by the permitting authority.
(m) A
				  food crop, a feed crop, or a fiber crop shall not be grown on an active
				  biosolids unit, unless the owner/operator of the surface disposal site
				  demonstrates to the permitting authority that through management practices
				  public health and the environment are protected from any reasonably anticipated
				  adverse effects of pollutants in biosolids when crops are grown.
(n) Animals shall not be grazed on an active
				  biosolids unit, unless the owner/ operator of the surface disposal site
				  demonstrates to the permitting authority that through management practices
				  public health and the environment are protected from any reasonably anticipated
				  adverse effects of pollutants in biosolids when animals are grazed.
(o) Public access to a surface disposal site
				  shall be restricted for the period that the surface disposal site contains an
				  active biosolids unit and for three years after the last active biosolids unit
				  in the surface disposal site closes.
(p) Biosolids placed on an active biosolids
				  unit shall not contaminate an aquifer.
(q) Results of a ground water monitoring
				  program developed by a qualified ground water scientist or a certification by a
				  qualified ground water scientist shall be used to demonstrate that biosolids
				  placed on an active biosolids unit does not contaminate an aquifer.