Examples of Natural background in a sentence
Natural background pollutants include those substances that are naturally occurring in soils or groundwater.
Natural background pollutants do not include legacy pollutants from earlier activity on your site, or pollutants in run-on from neighboring sources which are not naturally occurring.
Toxics Cleanup Program, Department of Ecology: Natural background soil metals concentrations in Washington State Publication No. 94-115.Olympia: Washington State Department of Ecology: October 1994.
Natural background pollutants do not include legacy pollutants from earlier activity on the site, or pollutants in run-on from neighboring sources that are not naturally occurring.
Natural background pollutants do not include legacy pollutants from earlier activity on the facility’s site, or pollutants in run-on from neighboring sources which are not naturally occurring.