Radioactive cesium, that is.
TEPCO announced the numbers for the density of radioactive materials after the decontamination using Kurion and then AREVA.
940,000 Bq/cm3 --> Kurion, ND --> AREVA, 450,000 Bq/cm3, and 66,000 Bq/cm3 (2 tests)
1,100,000 Bq/cm3 -->Kurion, ND --> AREVA, 520,000 Bq/cm3, and 77,000 Bq/cm3
So what is TEPCO's solution to the conundrum?
Stop using AREVA.
Does the company know why this happened?
Is the company interested in knowing?
To see the data for yourself, go here (PDF).