To determine background levels
of substances within the postal system, evaluators will mail a large volume of envelopes and packages to the Fort Huachuca, Ariz.
This is the most stringent regulatory standard in the United States: The NRC relies on a 25 millirem standard while the EPA uses a 15 millirem standard for background levels
A cleanup to surface water standards can be as strict and expensive as a cleanup to background levels
The size of the background level
and thus the sensitivity of the assay could be manipulated by the concentration of the metrizamide in the lower phase.
There are wall constructions that meet the rating of forty-five, and a background level
of forty-two is an acceptable noise level for open areas and in many closed offices.
Since the alert levels went up "rates of inflation and seismicity have waxed and waned, but have remained above what we consider to be long-term background levels
," the USGS said.
According to a 2003 study, Bradley Landfill's leachate contained tritium at 20,100 picocuries per liter over the drinking- water limit - that's 1,000 times the normal background level
crystallite shape, distribution and dimensions); b(2[theta]) and n(2[theta]) are the background level
and the noise distribution, respectively.
After this background level
plus 10 percent is achieved, it now becomes the background level
He added that they could not rule out the possibility that low background level
, as well as high methane levels, originated, in part, from microbial activity.
Tsai said that Taipower, the operator of Taiwan's three nuclear power plants, incinerates thousands of barrels of low-level nuclear waste each year to lessen the number of storage sites for the wastes, which he implicitly linked to a nationwide radiation level that is 2-4 times the natural background level
Before a large earthquake, that background level
of static-electricity discharges should rise sharply, Bleier said.