They are considered "immediately dangerous to life" at a concentration of 50 parts per million.
Although the carbon dioxide in the atmosphere remains at a concentration of 0.03 percent all over the world, the amount in the air has not always been the same.
For example, the new EPA guide refers to International Atomic Energy Agency guidelines that suggest intervention is not necessary until drinking water is contaminated with radioactive iodine 131 at a concentration of 81, 000 picocuries per liter.
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Prototypes built by researchers at the Naval Research Laboratory, Stanford University and Philips, a Dutch electrical-goods firm, can detect a substance that is present at a concentration of less than one part in a million billion.
But when Lea Rosh gave a speech at the inauguration of Berlin's new Holocaust memorial, she stunned the audience by brandishing a molar she found 17 years ago at Belzec, a Nazi concentration camp, and saying she would set it into one of the memorial's 2, 711 concrete pillars.
In college at Northwestern he majored in organizational change with a minor in business and a concentration at the music school.
For Spurs it was almost too easy, although a lapse in concentration at the back afforded Michael Brown a golden chance to reduce arrears, only for the unmarked midfielder to scuff his shot from six yards.
Mr Kumf was found to have served as a guard at Sachsenhausen concentration camp in Germany and Trawniki in Nazi-occupied Poland, where the mass shooting took place in 1943.
Driving a car at these insane speeds takes more concentration than you would normally use on a daily basis.
That is at least partly because of a concentration of women in workplaces like food and beverage stores, where 75% of all deaths were homicides.
Mr Kalejs is also alleged to have worked as a guard at the Salaspils concentration camp near the Latvian capital, Riga, where other murders were committed.
That is at least partly because of a concentration of women in workplaces like food and beverage stores, where a majority of all deaths are homicides.
About 2, 100 National Guard troops will be dispatched throughout New York state, with a large concentration at stationed at power plants, Grand Central Station, Penn Station and the George Washington Bridge.
Additionally, a concentration of power at City Hall means officials in citywide office, such as Messrs.
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Armstrong, a partner at the law firm Duane Morris who specializes in corporate law with a concentration in technology and compliance.
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Lynas currently has a concentration plant under construction at Mount Weld in Western Australia as well as an advanced materials plant in Kuantan, Malaysia.
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It has jumped into the solar business, where it makes highefficiency photovoltaic cells targeted at commercial applications in areas with a high concentration of sunlight, like deserts.
Brian-Anthony Garrison is a student at NC State University, majoring in English with a language, writing and rhetoric concentration.
Further, market concentration puts the health plan at a disadvantage in reimbursement rate negotiations.
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He spent time at a work camp near Auschwitz in Poland and soon learned of the horrors at the Nazi concentration camp nearby.
Von Kleist himself was arrested, questioned at length by the Gestapo, and sent to a concentration camp, but then inexplicably let go and returned to combat duty.
Then the Nazis latched on to it and a sign bearing the inscription appeared at the Dachau concentration camp, set up by Heinrich Himmler in 1933 to use dissidents as slave labour.
That concentration in education seems to put people at a financial disadvantage for the rest of their income-earning lives.
This year's winner, the University of North Carolina at Chapel Hill, already offers an undergraduate business degree with a concentration in entrepreneurship, and next fall will allow students in its College of Arts and Sciences to minor in entrepreneurship.
They sell at a discount to their peers for reasons ranging from small floats to their concentration in the supposedly played-out, storm-ridden Gulf of Mexico.
Sarwan's concentration only lapsed when a leading edge was held by Illingworth at 171-5, but Worcestershire's last opportunity slipped away eight runs later when Mahendra Nagamootoo was dropped at fine leg.
He was always convinced his parents and grandmother died in Auschwitz in 1944, and last week received a picture featuring the suitcase his father carried into the camp at the Nazi concentration camp, confirming this.
At UC Berkeley, in the late '90s, I majored in English with a concentration on gender and sexuality.
"Additional documentation indicates he refused to submit to a chemical analysis to determine alcohol concentration or presence of an impairing substance at the time of the citation, " the company said.
Racers follow the stream -- jumping off small cliffs and through waterfalls -- and a final rock face at the base creates one of the last challenges, requiring concentration and crab-walking to climb down.
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