Radioactive water has stopped leaking into the sea after gravel beneath the concrete pit was hardened after pouring 1500 liters of the hardening agent, liquid glass, into the gravel.
Tepco, April 6.
Low-level radioactive water continues flowing into the sea to make space for higher-level radioactive water.
Tepco is trying to control radioactive dust by spraying a synthetic resin around the reactors. The company reports success with this operation.
NHK world news, April 6, 2011.

Sand lance (a fish) fishing has stopped off the Ibaraki coast because the radioactive caesium in the fish reached 526 becquerels (limit is 500).
The high levels of caesium and iodine are believed to have been leakage from the reactor, according to the NISA (Nuclear and Industrial Safety Agency).
NHK April 5.