Dilution Attenuation Factor definition

Dilution Attenuation Factor or "DAF" means a unitless number greater than or equal to unity and represents the ratio of dissolved phase concentration at a downgradient location to the concentration at an upgradient location. It represents the reduction in concentration due to the combined influence of several factors (diffusion, dispersion, adsorption, decay, volatilization). It is applicable for all media, but is most commonly used for the unsaturated and saturated zones. DAF is generally estimated using a fate and transport model or based on site-specific data.
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Dilution Attenuation Factor means the ratio of the contaminant concentration in soil leachate to the concentration in groundwater at the receptor point.
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Examples of Dilution Attenuation Factor in a sentence

  • With the EPACML approach, as used in the past, EPA calculated a delisting level for each hazardous constituent by using the maximum estimated waste volume to determine a Dilution Attenuation Factor (DAF) from a table of waste volumes and DAFs previously calculated by the EPACML model, as modified for delisting.

  • Alternative Release-Specific Dilution or Dilution Attenuation Factor With respect to substances for which pollutant mobility criteria are specified in section 22a-134tt-App3Appendix B of the RBCRsSRs or approved by the commissioner pursuant to subsection (c)(6) of this section, the commissioner may approve or deny in writing a request for an alternative release-specific dilution or dilution attenuation factor.

  • If no standard was available in South Africa then the limits given by the WHO or other appropriate drinking water standards were used.• LCT1: Where possible, the LCT1 values were derived from the lowest value of the standard for human health effects listed for drinking water (LCT0) in South Africa by multiplying with a Dilution Attenuation Factor (DAF) of 50 as proposed by the Australian State of Victoria, June 2009.

  • While we recognize that the use of MassDEP’s standard leaching model likely does not account for the complexities of PFAS fate and transport, MassDEP should at a minimum apply its standard modeling approach as described in its the Background Documentation for the Development of the MCP Numerical Standards (April 1994) technical guidance to estimate a Dilution Attenuation Factor (DAF).

  • EPA converted the 500 tons to a waste volume of 590 cubic yards, by using the density of water for the density of the sludge.While the sludge is certainly more dense than water, using the lower density results in a higher value for the waste volume, and a lower, more conservative, Dilution Attenuation Factor (DAF).

  • The DAF number is the Dilution Attenuation Factor, and accounts for natural processes that reduce contaminant concentrations in the subsurface.The adopted soil criteria are shown in the attached Table 1 at the end of this report.

  • With the EPACML approach, EPA calculated a delisting level for each hazardous constituent by using the maximum estimated waste volume to determine a Dilution Attenuation Factor (DAF) from a table of waste volumes and DAFs previously calculated by the EPACML model, asof petitioned waste that BMW estimated it would dispose of each year.

  • Dilution Attenuation Factor Determination for PFASMassDEP elected not to use its leaching model of PFAS from soils because the model predictions were much lower than detectable concentrations of PFAS in soil.

  • Based on the risk calculations undertaken and presented in Section 5.4, the contribution to risk associated with the presence of Hg0 and methylmercury in groundwater is low and essentially negligible Dilution Attenuation Factor (DAF)As mercury in soil leachate moves through soil and groundwater, it is subject to physical, chemical and biological processes that tend to reduce the concentration at any receptor point (in this case assumed to be off the BIP).

  • As explained in more detail below, on information and belief, Doyle breached has duty of candor and good faith in dealing with the Patent Office by failing to disclose material information related to the ViolaWWW browser.

Related to Dilution Attenuation Factor

  • Dilution Factors means, without duplication, with respect to any period, the aggregate amount of all deductions, credit memos, returns, adjustments, allowances, bad debt write-offs and other non-cash credits which are recorded to reduce accounts receivable in a manner consistent with current and historical accounting practices of the Borrower.

  • Loss Factor means the scaling factor determined in accordance with clause 7 and applied by the reconciliation manager to volumes of electricity measured or estimated in respect of ICPs on the Network, in order to reflect the impact of the ICP on Losses within the Network;

  • emission factor means the average emission rate of a greenhouse gas relative to the activity data of a source stream assuming complete oxidation for combustion and complete conversion for all other chemical reactions;

  • Limited Indexation Factor means, in respect of a Limited Indexation Month or Limited Indexation Date, as the case may be, the ratio of the Index Figure applicable to that month or date, as the case may be, divided by the Index Figure applicable to the month or date, as the case may be, twelve months prior thereto, provided that (a) if such ratio is greater than the Maximum Indexation Factor specified in the relevant Final Terms, it shall be deemed to be equal to such Maximum Indexation Factor and (b) if such ratio is less than the Minimum Indexation Factor specified in the relevant Final Terms, it shall be deemed to be equal to such Minimum Indexation Factor;

  • Conversion Factor means 1.0, provided that in the event that the General Partner (i) declares or pays a dividend on its outstanding REIT Shares wholly or partly in REIT Shares or makes a distribution to all holders of its outstanding REIT Shares wholly or partly in REIT Shares, (ii) subdivides its outstanding REIT Shares, or (iii) combines its outstanding REIT Shares into a smaller number of REIT Shares, the Conversion Factor shall be adjusted by multiplying the Conversion Factor by a fraction, the numerator of which shall be the number of REIT Shares issued and outstanding on the record date for such dividend, distribution, subdivision or combination (assuming for such purposes that such dividend, distribution, subdivision or combination has occurred as of such time), and the denominator of which shall be the actual number of REIT Shares (determined without the above assumption) issued and outstanding on such date and, provided further, that in the event that an entity other than an Affiliate of the General Partner shall become General Partner pursuant to any merger, consolidation or combination of the General Partner with or into another entity (the “Successor Entity”), the Conversion Factor shall be adjusted by multiplying the Conversion Factor by the number of shares of the Successor Entity into which one REIT Share is converted pursuant to such merger, consolidation or combination, determined as of the date of such merger, consolidation or combination. Any adjustment to the Conversion Factor shall become effective immediately after the effective date of such event retroactive to the record date, if any, for such event; provided, however, that if the General Partner receives a Notice of Redemption after the record date, but prior to the effective date of such dividend, distribution, subdivision or combination, the Conversion Factor shall be determined as if the General Partner had received the Notice of Redemption immediately prior to the record date for such dividend, distribution, subdivision or combination.

  • Leverage Factor means the leverage factor in respect of a Series of ETP Securities as specified in the relevant Final Terms.

  • Required Reserve Factor Floor means, for any Calculation Period, the sum (expressed as a percentage) of (a) 28.00% plus (b) the product of the Adjusted Dilution Ratio and the Dilution Horizon Ratio, in each case, as of the immediately preceding Cut-Off Date.

  • Share Dilution Amount means the increase in the number of diluted shares outstanding (determined in accordance with GAAP applied on a consistent basis, and as measured from the date of the Issuer’s most recent consolidated financial statements prior to the Signing Date) resulting from the grant, vesting or exercise of equity-based compensation to employees and equitably adjusted for any stock split, stock dividend, reverse stock split, reclassification or similar transaction.

  • Weighting factor wT for an organ or tissue (T) means the proportion of the risk of stochastic effects resulting from irradiation of that organ or tissue to the total risk of stochastic effects when the whole body is irradiated uniformly. For calculating the effective dose equivalent, the values of wT are:

  • Average Monthly Limit means the maximum allowable "Average Monthly Concentration" as defined in Section 22a-430-3(a) of the RCSA when expressed as a concentration (e.g. mg/l); otherwise, it means "Average Monthly Discharge Limitation" as defined in Section 22a-430-3(a) of the RCSA.

  • Grade point average or "GPA" means the grade point average earned by an eligible student and reported by the high school or participating institution in which the student was enrolled based on a scale of 4.0 or its equivalent if the high school or participating institution that the student attends does not use the 4.0 grade scale;

  • Maximum contaminant level (MCL) means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system.

  • Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system.