In-stream Waste Concentration definition

In-stream Waste Concentration or "(IWC)" means the concentration of a discharge in the receiving water after mixing has occurred in the allocated zone of influence.
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In-stream Waste Concentration. (IWC) means the concentration of a toxicant in the receiving water, or for a discharge, the concentration of the effluent after minimum dilution authorized by the department. A discharge of one hundred divided by the minimum dilution is the IWC when the dilution is authorized by the director. A discharge of one hundred per cent effluent is the IWC when dilution is not authorized by the director.
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In-stream Waste Concentration. (IWC) means the concentration of a discharge in the receiving water after mixing has occurred in the allocated zone of influence. It is the inverse of the dilution factor.
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Examples of In-stream Waste Concentration in a sentence

  • The null hypothesis (Ho) for the TST statistical approach is: Mean discharge In-stream Waste Concentration (IWC) response ≤0.75 × Mean control response.

  • The most sensitive species is the fish, invertebrate, or alga species which demonstrates the largest percent effect level at the Instream Waste Concentration (IWC), where: IWC percent effect level = [(Control mean response − IWC mean response) ÷ Control mean response] × 100.

  • Cetsd = TSDfactor x Ce Where:Cetsd = Effluent concentration adjusted to 95th percentile value (mg/L or ug/L)TSDfactor = Factor based upon EPA TSD Table 3-2, pg 54Ce = critical (maximum observed) effluent pollutant concentration (mg/L or ug/L) The Instream Waste Concentration (IWC) is a measure of the effluent dilution and is also used as an estimate of the facility’s potential to cause or contribute to an excursion of the VWQS.

  • Discharge In-stream Waste Concentration (IWC) for Chronic Toxicity The chronic IWC is the concentration of a pollutant or the parameter toxicity in the receiving water after mixing.

  • Discharge In-stream Waste Concentration (IWC) for Chronic ToxicityThe chronic IWC is calculated by dividing 100 percent by the dilution ratio.

  • Instream Waste Concentration (IWC) for Chronic ToxicityThe chronic toxicity IWC required for the authorized discharge point is expressed as 100 percent (%) effluent (i.e., 1/S × 100, also 1 part effluent to S−1 parts dilutant).

  • Cetsd = TSDfactor x Ce Where:Cetsd = Effluent concentration adjusted to 95th percentile value (mg/L or ug/L) TSDfactor = Factor based upon EPA TSD Table 3-2, pg 54Ce = critical (maximum observed) effluent pollutant concentration (mg/L or ug/L) The Instream Waste Concentration (IWC) is a measure of the effluent dilution and is also used as an estimate of the facility’s potential to cause or contribute to an excursion of the VWQS.

  • Instream Waste Concentration (IWC) for Chronic ToxicityThe chronic toxicity IWC required for the authorized discharge point is expressed as 100 percent (%) effluent.

  • Discharge In-stream Waste Concentration (IWC) for Chronic Toxicity The chronic toxicity IWC for this discharge is 100 percent effluent.

  • Pass–Fail results are coded as Pass (0) (Test of Significant Toxicity (“TST”) null hypothesis is rejected and the Instream Waste Concentration (“IWC”) is declared not toxic) and Fail (1) (TST null hypothesis is not rejected and the IWC is declared toxic).


More Definitions of In-stream Waste Concentration

In-stream Waste Concentration. (“IWC”) means the discharge flow divided by the sum of the discharge flow plus the 7Q10 flow allocation.
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In-stream Waste Concentration means the concentration of the effluent in the receiving water after mixing. It is the inverse of the dilution factor.
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In-stream Waste Concentration. (“IWC%”) means the concentration (as a percent) of the effluent in the receiving water.
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In-stream Waste Concentration or "(IWC)" means the concentration of a disch occurred in the allocated zone of influence.
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Related to In-stream Waste Concentration

  • Residual disinfectant concentration (“C” in CT calculations) means the concentration of disinfectant measured in mg/l in a representative sample of water.

  • Alcohol concentration means the number of grams of alcohol per:

  • Derived air concentration (DAC) means the concentration of a given radionuclide in air which, if breathed by the reference man for a working year of 2,000 hours under conditions of light work, results in an intake of one ALI. For purposes of these regulations, the condition of light work is an inhalation rate of 1.2 cubic meters of air per hour for 2,000 hours in a year. DAC values are given in Part 4, Appendix 4B, Table 4B1, Column 3.

  • median concentration means that half of the homes in a county are expected to be below this value and half to be above it. All houses contain some radon, and a few houses will contain much more than the median concentration. The only way to accurately assess long-term exposure to radon in a specific house is through long-term testing (sampling the indoor air for a year or more). The EPA recommends that all homes be tested for radon. Columbia University's "Radon Project" website offers help to homeowners in assessing the cost vs. benefit of testing a specific house for radon or modifying it for radon reduction (see http://www.stat.columbia.edu/~radon/).

  • Net concentration means the difference between the concentration of a given substance in a sample taken of the discharge and the concentration of the same substances in a sample taken at the intake which supplies water to the given process. For the purpose of this definition, samples that are taken to determine the net concentration shall always be 24-hour composite samples made up of at least six increments taken at regular intervals throughout the plant day.

  • Medical marijuana concentrate means a specific subset of Medical Marijuana that was produced by extracting Cannabinoids from Medical Marijuana. Categories of Medical Marijuana Concentrate include Water-Based Medical Marijuana Concentrate, Food-Based Medical Marijuana Concentrate, Solvent-Based Medical Marijuana Concentrate, and Heat/Pressure- Based Medical Marijuana Concentrate.

  • iron ore concentrates means products (whether in pellet or other form) resulting from secondary processing but does not include metallised agglomerates;

  • Cannabinoid concentrate means a substance obtained by separating cannabinoids from marijuana by:

  • Concentration means the weight of any given material present in a unit volume of liquid. Unless otherwise indicated in this permit, concentration values shall be expressed in milligrams per liter (mg/l).

  • Background concentration means such concentration of that substance as is present in:

  • Baseline concentration means that ambient concentration level that exists in the baseline area at the time of the applicable minor source baseline date. A baseline concentration is deter- mined for each pollutant for which a minor source baseline date is estab- lished and shall include:

  • Hazardous Waste Management Facility means, as defined in NCGS 130A, Article 9, a facility for the collection, storage, processing, treatment, recycling, recovery, or disposal of hazardous waste.

  • Marijuana concentrate means any type of marijuana product consisting wholly or in part of

  • Chemical Storage Facility means a building, portion of a building, or exterior area adjacent to a building used for the storage of any chemical or chemically reactive products.

  • Waste oil means used or spent oil or solvents or other volatile hydrocarbons, including but not limited to crankcase oil.

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

  • Multi-purpose Lubricant means any lubricant designed for general purpose lubrication, or for use in a wide variety of applications. “Multi-purpose Lubricant” does not include “Multi-purpose Dry Lubricants”, “Penetrants”, or “Silicone-based Multi-purpose Lubricants”.

  • Residual Waste means low-level radioactive waste resulting from processing or decontamination activities that cannot be easily separated into distinct batches attributable to specific waste generators. This waste is attributable to the processor or decontamination facility, as applicable.

  • Geothermal fluid means water in any form at temperatures greater than 120

  • Waste means any waste material (1) containing byproduct material and (2) resulting from the operation by any person or organization of any nuclear facility included within the definition of nuclear facility under paragraph (a) or (b) thereof; “nuclear facility” means