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

  • 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.

  • Excess Concentration means the sum of the following amounts, without duplication:

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

  • business waste means waste that emanates from premises that are used wholly or mainly for commercial, retail, wholesale, entertainment or government administration purposes;

  • Cannabis waste means waste that is not hazardous waste, as defined in Public Resources Code section 40141, that contains cannabis and that has been made unusable and unrecognizable in the manner prescribed in sections 5054 and 5055 of this division.

  • 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