Naturally occurring background definition

Naturally occurring background means the quality of individual media in the vicinity of a discharge of a hazardous sub- stance or environmental pollution that has not been affected by a hazardous substance discharge or environmental pollution.
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Examples of Naturally occurring background in a sentence

  • Naturally occurring, background concentrations of metals in soil exceed risk-based screening levels in some cases.

  • Naturally occurring background loading is a type of nonpoint source.

  • Naturally occurring background concentrations of metals were established in a manner consistent with national guidance EPA has published for other pollutants (Buck et al., 2000).

  • Naturally occurring background levels for PID monitoring range between 0.0 ppm and 2.0 ppm but can also fluctuate due to ambient conditions (e.g. nearby traffic exhaust, high humidity, excess moisture).

  • Naturally occurring background radiation is the ionising radiation within the environment that people are continuously exposed to.

  • Naturally occurring background radiation levels are typically low and would only present a radiological hazard when in concentrated form.

  • The background con- centration for a substance in soil shall be determined using a depart- ment−approved and appropriate method.Note: Naturally occurring background concentrations of arsenic in soil, for exam- ple, may be higher than the residual contaminant level for arsenic listed in Table 2.

  • Naturally occurring background levels of Ni in soils and sediments range from <5 to 700 ppm (Shacklette 1984).

  • In the 4th Ministerial Consultation Abu Dhabi Dialogue in January 2017, the Government of Indonesia underlined the importance of cooperation between sending and receiving countries to implement safe and fair migration for migrant workers.

  • Note: Naturally occurring background concentrations of arsenic in soil, for exam- ple, may be higher than the residual contaminant level for arsenic listed in Table 2.

Related to Naturally occurring background

  • Autism spectrum disorders means any of the pervasive developmental disorders as defined by the Diagnostic and Statistical Manual of Mental Disorders, 4th edition, published by the American Psychiatric Association, including autistic disorder, Asperger's disorder and pervasive developmental disorder not otherwise specified.[PL 2011, c. 420, Pt. A, §26 (RAL).]

  • manoeuvring area means that part of an aerodrome to be used for the take-off, landing and taxiing of aircraft, excluding aprons;

  • Autism spectrum disorder means a neuro-developmental condition typically appearing in the first three years of life that significantly affects a person's ability to communicate, understand relationships and relate to others, and is frequently associated with unusual or stereotypical rituals or behaviours.

  • ionising radiation means the transfer of energy in the form of particles or electromagnetic waves of a wavelength of 100 nanometres or less or a frequency of 3 x 1015 hertz or more capable of producing ions directly or indirectly;