Fig.1-39 Three-layered investigation area separated by a water-impermeable steel plate
A soil-water-collecting device was installed at the bottom of underlying soil (50-cm-thick clean soil). Contaminated surface soil was buried at a depth of over 100 cm and covered with 30-cm-thick clean soil. Soil cores were bored periodically in the area to investigate the vertical distribution of radioactive Cs.
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