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FOR THE RECORD - Nov. 18, 2009

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Nevada radiation: An article in Friday’s Section A about contaminated water at the Nevada Test Site said the federal drinking water standard for radiation is 20 picocuries per liter. There are actually three standards, depending on the type of radiation: For alpha particles, the standard is 15 picocuries per liter; for long-term radionuclides, it’s 50 picocuries per liter; and for short-lived tritium, it’s 20,000 picocuries per liter. The article also said the test site is northeast of Las Vegas; it is northwest.

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