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In July, a test showed Newark water lead levels at 55 ppb.
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It is also keeping the exiting annual average standard of 53 ppb.
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But he chose the 10 ppb dose for a very human reason.
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At one point, tests in Flint revealed lead levels at over 100 ppb.
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The province's current limit is 10 ppb - twice as high as federal guidelines.
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The EPA says a concentration of five partsperbillion is acceptable.
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Note that micrograms per liter is the same thing as partsperbillion.
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My tap water sample was very close to five partsperbillion TCE.
4
The spectrometers typically detect chemicals in the "low partsperbillion" range.
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The highest test results were at 11 partsperbillion (ppb).
Использование термина part per billion на английском
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Able to smell explosive traces as fine as one partperbillion.
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The state's limit is one partperbillion, below the federal government's limit of five parts per billion.
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Prof Wall said there was a time when science could detect chemicals and taint in milk at one partperbillion.
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There is methane on Mars too, but the measly amount, just one partperbillion, may come from reactions in rocks.
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On Mars, the amount of methane floating around is measly: about one partperbillion, with bursts reaching 10 times that amount.
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Conclusions: MAP has an analytical selectivity of one partperbillion for detection of MIDIs and an analytical sensitivity of one molecule.
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Chlorofluorocarbons are also not very abundant-theyconstitute only about one partperbillion of the atmosphere as a whole-butthey are extravagantly destructive.
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Scripps A plane with a hyperspectral sensor will measure the ocean's color, detecting dye down to just half a partperbillion, says Feddersen.
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They show that the gas is present at about 1 partperbillion in the Martian atmosphere, or 4,000 times less than in Earth's air.
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The EPA says a concentration of five partsperbillion is acceptable.
11
Note that micrograms per liter is the same thing as partsperbillion.
12
My tap water sample was very close to five partsperbillion TCE.
13
The spectrometers typically detect chemicals in the "low partsperbillion" range.
14
The highest test results were at 11 partsperbillion (ppb).