### Radioactive waste from a clinical laboratory

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##### Reference no: EM1382519

A radioactive waste from a clinical laboratory contains 0.2 μCi (microcuries) of calcium-45 (45Ca) per liter. The half-life of 45Ca is 152 days.

a) How long must this waste be stored before the level of radioactivity falls below the required maximum of 0.01 μCi/L?

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