Acute toxic unit definition

Acute toxic unit or "TUa" means 100/LC50 where the LC50 is expressed as a percent effluent in the test medium of an acute whole effluent toxicity (WET) test that is statistically or graphically estimated to be lethal to fifty percent (50%) of the test organisms.

Examples of Acute toxic unit in a sentence

  • Acute toxic unit (TUa) means 100/LC50 where the LC50 is determined from a whole effluent toxicity (WET) test which produces a result that is statistically or graphically estimated to be lethal to 50% of the test organisms.

  • An LC50/EC50 (lethal/immobile concentration) less than or equal to 100 percent effluent constitutes a positive for toxicity.7.2 "Acute toxic unit (TUa)" is the reciprocal of the effluent dilution that causes the acute effect by the end of the acute exposure period.

  • Acute toxic unit (TUA) means 100/LC50 where the LC50 is determined from a whole effluent toxicity (WET) test which produces a result that is statistically or graphically estimated to be lethal to 50% of the test organisms.

  • Acute toxic unit (TUa) means 100/LCso where the LCso is determined from a whole effluent toxicity (WET) test which produces a result that is statistically or graphically estimated to be lethal to 50% ofthe test organisms.

  • Acute toxic unit (TUA) means 100/LC50 where the LC50 is determined from a whole effluent toxicity (WET) test which produces a result that is statistically or graphically estimated to be lethal to 50 percent of the test organisms.

Related to Acute toxic unit

  • 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.

  • Toxic chemical means a chemical or chemical category listed in 40 CFR 372.65.

  • toxic waste or "toxic substance" under any provision of Environmental Law and shall also include, without limitation, petroleum, petroleum products, asbestos, polychlorinated biphenyls and radioactive materials;

  • Toxic Substance includes but is not limited to asbestos, polychlorinated biphenyls (PCBs) and lead-based paints.

  • Irritant means any substance, other than a corrosive, that on

  • Pathological waste means waste material consisting of only human or animal remains, anatomical parts, and/or tissue, the bags/containers used to collect and transport the waste material, and animal bedding (if applicable).

  • toxic substances as defined by the Toxic Substances Control Act, as amended from time to time (“TSCA”), (4) “hazardous materials” as defined by the Hazardous Materials Transportation Act, as amended from time to time (“HMTA”), (5) asbestos, oil or other petroleum products, radioactive materials, urea formaldehyde foam insulation, radon gas and transformers or other equipment that contains dielectric fluid containing polychlorinated biphenyls and (6) any substance whose presence is detrimental or hazardous to health or the environment, including, without limitation, microbial or fungal matter or mold, or is otherwise regulated by federal, state and local environmental laws (including, without limitation, RCRA, CERCLA, TSCA, HMTA), rules, regulations and orders, regulating, relating to or imposing liability or standards of conduct concerning any Hazardous Materials or environmental, health or safety compliance (collectively, “Environmental Requirements”). As used in this Contract: “Release” means spilling, leaking, pumping, pouring, emitting, emptying, discharging, injecting, escaping, leaching, dumping or disposing.

  • Animal Unit means a unit of measure used to compare differences in the production of animal manure and set forth in Minn. R. 7020.0300, subp. 5.

  • Covered Species means the species for which the Bank has been established and for which Credits have been allocated as set forth in Exhibit F-1.

  • Acute pain means the normal, predicted physiological response to a noxious chemical, thermal or mechanical stimulus and typically is associated with invasive procedures, trauma and disease. Generally, acute pain is self-limited, lasting no more than a few weeks following the initial stimulus.

  • Universal waste transporter means a person engaged in the off-site transportation of universal waste by air, rail, highway, or water.

  • Industrial wastes means the liquid wastes from industrial manufacturing processes, trade, or business as distinct from sanitary sewage.

  • Infectious waste means a solid waste that contains or may reasonably be

  • Animal waste means any waste consisting of animal matter that has not been processed into food for human consumption.

  • Violent student means a student under the age of 21 who:

  • Radioactive waste means radioactive waste as defined in Article 3(7) of Council Directive 2011/70/Euratom8;

  • Chemical dependency means the physiological and psychological addiction to a controlled drug or substance, or to alcohol. Dependence upon tobacco, nicotine, caffeine or eating disorders are not included in this definition.

  • Explosives or munitions emergency response means all immediate response activities by an explosives and munitions emergency response specialist to control, mitigate, or eliminate the actual or potential threat encountered during an explosives or munitions emergency. An explosives or munitions emergency response may include in-place render-safe procedures, treatment or destruction of the explosives or munitions and/or transporting those items to another location to be rendered safe, treated, or destroyed. Any reasonable delay in the completion of an explosives or munitions emergency response caused by a necessary, unforeseen, or uncontrollable circumstance will not terminate the explosives or munitions emergency. Explosives and munitions emergency responses can occur on either public or private lands and are not limited to responses at RCRA facilities.

  • Dangerous weapon means any weapon, device, instrument, material or substance which under the circumstances in which it is used, attempted to be used or threatened to be used, is readily capable of causing death or serious physical injury.

  • chemical tanker means a ship constructed or adapted and used for the carriage in bulk of any liquid product listed in chapter 17 of the International Bulk Chemical Code;

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

  • Hazardous Wastes means all waste materials subject to regulation under CERCLA, RCRA or applicable state law, and any other applicable Federal and state laws now in force or hereafter enacted relating to hazardous waste disposal.

  • Threatened or endangered species means all spe- cies of wildlife listed as "threatened" or "endangered" by the United States Secretary of the Interior or Commerce, and all species of wildlife designated as "threatened" or "endan- gered" by the Washington fish and wildlife commission.

  • Endangered species means wildlife designated by the

  • Gaseous pollutants means the exhaust gas emissions of carbon monoxide, oxides of nitrogen expressed in nitrogen dioxide (NO2) equivalent and hydrocarbons assuming ratio of:

  • Contaminant means any material, substance or waste that is classified, regulated or otherwise characterized under any Environmental Law as hazardous, toxic, a contaminant or a pollutant or by other words of similar meaning or regulatory effect, including any petroleum or petroleum-derived substance or waste, asbestos and polychlorinated biphenyls.