TEPCO's press release on May 28 on the samples taken on May 27 shows the water OUTSIDE the silt fence for the Reactor 4 water intake had a much higher radioactive material concentration than the water inside the silt fence.
This wasn't the case at all on May 25 samples whose level of radioactive materials was higher INSIDE the silt fence, as you would expect. Hmmm. The silt fence for the Reactor 4 water intake is not working? But why would the outside be more radioactive than the inside?
Top, May 25 sample data; bottom, May 27 sample data, from TEPCO press releases; iodine-131, cesium 134, cesium-137:
