Background concentrations definition

Background concentrations means concentrations of contaminants that are naturally occurring in the groundwater, surface water, soil, or sediment in the vicinity of the site.
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Background concentrations means concentrations of contaminants that are naturally occurring or resulting from anthropogenic impacts unrelated to the discharge of pollutants or hazardous substances at a contaminated site undergoing site rehabilitation, in the groundwater, surface water, soil, or sediment in the vicinity of the site.
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Background concentrations means concentrations of contaminants that are naturally occurring in the groundwater, surface
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Examples of Background concentrations in a sentence

  • Background concentrations of specific pollutants may also be considered during the investigation.

  • Background concentrations for the other FTIR- and CEMS-measured compounds were assumed to be zero.

  • Background concentrations contained in Table 3 of the Ocean Plan.

  • Background concentrations are an essential part of the total air quality concentration to be considered in determining source impacts.

  • Background concentrations of specific pollutants may be considered during the investigation as described in Part IV, Section A.2. above.

  • Background concentrations have to be less than 25% of limit concentration.

  • Background concentrations may be identified by laboratory analyses of samples of stormwater run-on to the permitted facility, by laboratory analyses of samples of stormwater run-off from adjacent non-industrial areas, or by identifying the pollutant is a naturally occurring material in soils at the site.

  • Background concentrations of uranium in well MW-27 (34 µg/L) and selenium in MW-31 (71 µg/L) exceed the GWQS, therefore these wells have been classified as Class III groundwater rather than Class II groundwater.

  • Background concentrations of uranium in well MW-18 (55.1 µg/L) and thallium in MW-19 (2.1 µg/L) exceed the GWQS, 30 µg/L and 2.0 µg/L, respectively.

  • Background concentrations of trace and major elements in California soils.


More Definitions of Background concentrations

Background concentrations means concentrations of petroleum products’ contaminants chemicals of concern that are naturally occurring in the groundwater, surface water, soil or sediment in the vicinity of the site.
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Related to Background concentrations

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

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

  • 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.

  • 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:

  • 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.

  • 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/).

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

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

  • 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 and Solvent-Based Medical Marijuana Concentrate.

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

  • Source-image receptor distance means the distance from the source to the center of the input surface of the image receptor.

  • Cannabis concentrate means cannabis that has undergone a process to concentrate one or more active cannabinoids, thereby increasing the product’s potency. Resin from granular trichomes from a cannabis plant is a concentrate for purposes of this division. A cannabis concentrate is not considered food, as defined by Section 109935 of the Health and Safety Code, or a drug, as defined by Section 109925 of the Health and Safety Code.

  • Critical Test Concentration or "(CTC)" means the specified effluent dilution at which the Permittee is to conduct a single-concentration Aquatic Toxicity Test.

  • 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).

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

  • Borrower Products means all products, software, service offerings, technical data or technology currently being designed, manufactured or sold by Borrower or which Borrower intends to sell, license, or distribute in the future including any products or service offerings under development, collectively, together with all products, software, service offerings, technical data or technology that have been sold, licensed or distributed by Borrower since its incorporation.

  • Loop Concentrator/Multiplexer or "LCM" is the Network Element that does one or more of the following: aggregates lower bit rate or bandwidth signals to higher bit rate or bandwidth signals (multiplexing); disaggregates higher bit rate or bandwidth signals to lower bit rate or bandwidth signals (demultiplexing); aggregates a specified number of signals or channels to fewer channels (concentrating); performs signal conversion, including encoding of signals (e.g., analog to digital and digital to analog signal conversion); or in some instances performs electrical to optical (E/O) conversion. LCM includes DLC, and D4 channel banks and may be located in Remote Terminals or Central Offices.

  • Diagnostic source assembly means the tube housing assembly with a beam-limiting device attached.

  • Residual disinfectant concentration means the concentration of disinfectant measured in mg/L in a representative sample of water.

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

  • Excluded Products means the items described on the applicable restricted products per country, any other applicable Program Policy, or any other information made available to you by LINIO.

  • Obligor Concentration Limit At any time, in relation to the aggregate Unpaid Balance of Receivables owed by any single Obligor and its Affiliated obligors (if any):

  • Open-Source Components means any software component that is subject to any open-source copyright license agreement, including any GNU General Public License or GNU Library or Lesser Public License, or other obligation, restriction or license agreement that substantially conforms to the Open Source Definition as prescribed by the Open Source Initiative or otherwise may require disclosure or licensing to any third party of any source code with which such software component is used or compiled.

  • Total tetrahydrocannabinol means the sum of the percentage by weight of tetrahydrocannabinolic acid multiplied by eight hundred seventy-seven thousandths plus the percentage of weight of tetrahydrocannabinol.

  • Caribbean Basin country construction material means a construction material that—