Acute Criteria definition

Acute Criteria means the highest concentrations of toxic substances to which organisms can be exposed for a brief period of time (as measured by approved short-term exposure tests) without causing mortality or other unacceptable effects.
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Acute Criteria means the threshold concentration of a substance that aquatic organisms can be exposed to for a period of 96 hours or less with no resulting acute toxicity.
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Acute Criteria means a one-hour average concentration in ambient waters which should not be exceeded more than once every three years on average. In general, acute criteria thresholds are higher than those for chronic criteria.
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Examples of Acute Criteria in a sentence

  • The following table presents the factors used to determine the acute and chronic total recoverable criteria for each metal: *Acute Criteria (CMC) = exp{ma*ln(hardness)+ba}**Chronic Criteria (CCC) = exp{mc*ln(hardness)+bc} In order to determine whether the effluent has the reasonable potential to cause or contribute to an exceedence above the in-stream water quality criteria for each metal, the following mass balance is used to project in-stream metal concentrations downstream from the discharge.

  • EPA considers Total Recoverable Aluminum concentrations higher than 87 µg/l (Acute Criteria) and 750 µg/l (Chronic Criteria) to be toxic to aquatic organisms.

  • Acute Criteria Evaluation Pollutant1 Statistical ratio used to estimate the 95th percentile using a single effluent concentration or the geometric mean of a dataset.

  • However, Chronic Criteria will be used in place of Acute Criteria and shall not be exceeded in waters of the Reservation.

  • The critical conditions for Outfall 001 are as follows: Outfall 001 – 7Q2 = 14.12 cfs (9.11 MGD), harmonic mean = 32.80 cfs, Chronic Criteria – Mixing Zone (MZ) = 3.16%; Acute Criteria – Zone of Initial Dilution (ZID) = 11.53%; Human Health Criteria (HH) = 1.38%.

  • The following table presents the factors used to determine the acute and chronic total recoverable criteria for each metal: * Acute Criteria (CMC) = exp{ma*ln(hardness)+ba}** Chronic Criteria (CCC) = exp{mc*ln(hardness)+bc} In order to determine whether the effluent has the reasonable potential to cause or contribute to an exceedance above the in-stream water quality criteria for each metal, the following mass balance is used to project in-stream metal concentrations downstream from the discharge.

  • Since the facility has a Critical Dilution (CD) of 41.1% for Acute Criteria of 0.019 mg/l and 6.5% for Chronic Criteria of 0.011 mg/l, the TRC concentration permit limit at the edge of the mixing zone is 0.046 mg/l to meet the Acute Criteria for Total Residual Chlorine.

  • The Proprietor shall not be obliged to accept foreign cur- rencies.

  • Final WQBELs for Chlorine and Total Ammonia with respect to Elk Creek Daily Flow Reasonable Potential Analysis (RPA) and Water Quality Effluent Limit (WQBEL) Calculations0.12Elk Creek WWTFFinal Permit limits > 6 cfs< 6 cfsFacility nameDesign Flow (MGD) Dilution FactorsAquatic Life - Acute Criteria - Criterion Max.

  • EPA considers concentrations at the edge of the mixing zone higher than 0.011 mg/l (Chronic Criteria) and 0.019 mg/l (Acute Criteria) to be toxic to aquatic organisms.


More Definitions of Acute Criteria

Acute Criteria means the highest instream concentration of a toxic substance or an effluent to which an organism can be ex- posed for one (1) hour without causing an unacceptable harmful ef- fect.
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Related to Acute Criteria

  • Acceptance Criteria means the Specifications, goals, performance measures, testing results and/or other criteria designated by the Agency and against which the Deliverables may be evaluated for purposes of Acceptance or Non-acceptance thereof.

  • Performance Goals means, for a Performance Period, the one or more goals established by the Board for the Performance Period based upon the Performance Criteria. Performance Goals may be based on a Company-wide basis, with respect to one or more business units, divisions, Affiliates, or business segments, and in either absolute terms or relative to the performance of one or more comparable companies or the performance of one or more relevant indices. Unless specified otherwise by the Board (i) in the Award Agreement at the time the Award is granted or (ii) in such other document setting forth the Performance Goals at the time the Performance Goals are established, the Board will appropriately make adjustments in the method of calculating the attainment of Performance Goals for a Performance Period as follows: (1) to exclude restructuring and/or other nonrecurring charges; (2) to exclude exchange rate effects; (3) to exclude the effects of changes to generally accepted accounting principles; (4) to exclude the effects of any statutory adjustments to corporate tax rates; (5) to exclude the effects of any “extraordinary items” as determined under generally accepted accounting principles; (6) to exclude the dilutive effects of acquisitions or joint ventures; (7) to assume that any business divested by the Company achieved performance objectives at targeted levels during the balance of a Performance Period following such divestiture; (8) to exclude the effect of any change in the outstanding shares of common stock of the Company by reason of any stock dividend or split, stock repurchase, reorganization, recapitalization, merger, consolidation, spin-off, combination or exchange of shares or other similar corporate change, or any distributions to common stockholders other than regular cash dividends; (9) to exclude the effects of stock based compensation and the award of bonuses under the Company’s bonus plans; (10) to exclude costs incurred in connection with potential acquisitions or divestitures that are required to expensed under generally accepted accounting principles; (11) to exclude the goodwill and intangible asset impairment charges that are required to be recorded under generally accepted accounting principles and (12) to exclude the effect of any other unusual, non-recurring gain or loss or other extraordinary item. In addition, the Board retains the discretion to reduce or eliminate the compensation or economic benefit due upon attainment of Performance Goals and to define the manner of calculating the Performance Criteria it selects to use for such Performance Period. Partial achievement of the specified criteria may result in the payment or vesting corresponding to the degree of achievement as specified in the Stock Award Agreement or the written terms of a Performance Cash Award.

  • Goal means the intended or projected result of a comprehensive corrections plan or community corrections program to reduce prison commitment rates, to reduce the length of stay in a jail, or to improve the utilization of a jail.