"Detectors show no heat radiation above background within two hundred meters."

Accumulations in the soil, vegetation, and surface runoff have not been large enough to measure above natural background.

There was no reading above background even on its most sensitive scale.

All excreted methane in their breath at least 5 ppm above background.

Collect a sample for any radiation pager reading significantly above background.

Approximately 45% of the 12,600 probe sets were detected above background.

Our primary exposure measure was the CO 2 concentration above background in each building.

Radiation flux is above background but nothing we'd need to worry about in the short term, even without our suits.

No emissions above background are seen if the landfill is designed correctly.

That still leaves the area around 140GeV open, where a signal a few standard deviations above background was apparent in last month's data.