Natural biodegradation definition

Natural biodegradation means in-situin situ biological processes such as aerobic respiration, anaerobic respiration, and cometabolism, that occur without human intervention and that break down hazardous substances into other compounds or elements. The process is typically a multiple step process and may or may not result in organic compounds being completely broken down or mineralized to carbon dioxide and water.
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Natural biodegradation means biodegradation that occurs without human intervention. See definition of “biodegradation.”
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Examples of Natural biodegradation in a sentence

  • Natural biodegradation processes within waste bodies give rise to landfill leachate (produced as a result of rainfall passing through the waste body) and landfill gas.

  • Natural biodegradation under Alternative 2 is an irreversible treatment process that would reduce the mass and concentration of contaminants.

  • Natural biodegradation of contaminants tends to be rate limited due to limitations on the biological processes.

  • In this nutrient-poor environment, Natural biodegradation processes were demonstrated to be active in the attenuation of this chlorinated solvent plume.

  • Natural biodegradation processes associated with the No Action and Natural Attenuation alternatives (Alternatives 1 and 4) will reduce the toxicity of ground water contaminants via natural biodegradation processes occurring within the Plume.

  • Natural biodegradation (mineralization or transformation) of a wide range of hydrocarbons, including polycyclic aromatic hydrocarbons (PAHs) and aliphatic and aromatic compounds, occurs in various extreme habitats.

  • Natural biodegradation processes would be enhanced through air sparging in order to reduce COC concentrations in groundwater to levels protective of sediments prior to reaching the sediments.

  • Id.In his petition for review, the appellant appears to challenge the validity of the settlement agreement based on coercion.

  • Natural biodegradation of the hydrocarbons creates reducing conditions, which increases the solubility of metals, such as manganese and iron, from the well casing or aquifer sediment.

  • P Natural biodegradation may result in the complete destruction of contaminants in- situ.P May be used in conjunction with, or as follow-up to, active remedial measures.P Much less effective where TPH concentrations in soil are high (> 20,000 to 25,000 mg/kg).

Related to Natural biodegradation

  • Diatomaceous earth filtration means a process resulting in substantial particulate removal in which a precoat cake of diatomaceous earth filter media is deposited on a support membrane (septum), and while the water is filtered by passing through the cake on the septum, additional filter media known as body feed is continuously added to the feed water to maintain the permeability of the filter cake.

  • High global warming potential hydrofluorocarbons means any hydrofluorocarbons in a particular end use for which EPA’s Significant New Alternatives Policy (SNAP) program has identified other acceptable alternatives that have lower global warming potential. The SNAP list of alternatives is found at 40 CFR part 82, subpart G, with supplemental tables of alternatives available at (http://www.epa.gov/snap/ ).

  • Biological safety cabinet means a containment unit suitable for the preparation of low to moderate risk agents where there is a need for protection of the product, personnel, and environment, according to National Sanitation Foundation (NSF) Standard 49.

  • Acute toxicity means concurrent and delayed adverse effects that result from an acute exposure and occur within any short observation period, which begins when the exposure begins, may extend beyond the exposure period, and usually does not constitute a substantial portion of the life span of the organism.

  • Nitrogen oxides means nitric oxide and nitrogen dioxide, expressed as nitrogen dioxide (NO2);

  • Natural radioactivity means radioactivity of naturally occurring nuclides.

  • Corrosion inhibitor means a substance capable of reducing the corrosivity of water toward metal plumbing materials, especially lead and copper, by forming a protective film on the interior surface of those materials.

  • Fluoroscopic imaging assembly means a subsystem in which X-ray photons produce a visual image. It includes the image receptor(s) such as the image intensifier and spot-film device, electrical interlocks, if any, and structural material providing linkage between the image receptor and diagnostic source assembly.

  • COVID-19 Pandemic means the SARS-Cov2 or COVID-19 pandemic, including any resurgence or evolutions or mutations thereof and/or any related or associated outbreaks, epidemics and/or pandemics.

  • Infiltration means water other than wastewater that enters a sewer system (including sewer system and foundation drains) from the ground through such means as defective pipes, pipe joints, connections, or manholes. Infiltration does not include, and is distinguished from, inflow.

  • Total tetrahydrocannabinol means the sum of the percentage by weight of tetrahydrocannabinolic acid multiplied by eight hundred seventy-seven thousandths plus the percentage of weight of tetrahydrocannabinol.

  • Natural uranium means uranium with the naturally occurring distribution of uranium isotopes, which is approximately 0.711 weight percent uranium-235, and the remainder by weight essentially uranium-238.

  • aerodrome means a defined area on land or water (including any buildings, installations and equipment) intended to be used either wholly or in part for the arrival, departure and surface movement of aircraft;

  • Chemical agent shall mean any compound which, when suitably disseminated, produces incapacitating, damaging or lethal effects on people, animals, plants or material property.

  • Biodegradable means degradable through a process by which fungi or bacteria secrete enzymes to convert a complex molecular structure to simple gasses and organic compounds.

  • Natural attenuation means a variety of physical, chemical or biological processes that, under favorable conditions, act without human intervention to reduce the mass, toxicity, mobility, volume, or concentration of hazardous substances in the environment. These in situ processes include: Natural biodegradation; dispersion; dilution; sorption; volatilization; and chemical or biological stabilization, transformation, or destruction of hazardous substances. See WAC 173- 340-370(7) for a description of the expected role of natural attenuation in site cleanup. A cleanup action that includes natural attenuation and conforms to the expectation in WAC 173- 340-370(7) can be considered an active remedial measure.

  • Electrostatic spray means a method of applying a spray coating in which opposite electric charges are applied to the substrate and the coating. The coating is attracted to the substrate by the electrostatic potential between them.

  • Low-level radioactive waste or “waste” means radioactive material that consists of or contains class A, B, or C radioactive waste as defined by 10 C.F.R. 61.55, as in effect on January 26, 1983, but does not include waste or material that is any of the following:

  • CO2 means carbon dioxide.