1 plant, exceeds the legal limit. The government plans to help households in designated areas to evacuate, raising concern among residents. Although the Tsukidate elementary school has not detected radiation levels in excess of the legal limit, about 80 parents and teachers thoroughly wash windows and verandas with high-pressure water jets and brushes and the school suspends activities on the playground in response to concern by parents. Tuesday, 21 June A radiation reading of 430 millisieverts per hour is recorded in a mezzanine between the first floor and basement of reactor 2. This is the highest level measured up to this point in the reactor 2 building, and marks the first time that workers have entered the basement of this building since the beginning of the crisis. Monday, 27 June Although the radioactive water treatment system has not yet started full-scale operation, a total of 1,850 tons of radioactive water has been processed during test runs of the system. Today this decontaminated water is used to cool the reactors for the first time. TEPCO states that it will continue injecting 16 tons of water per hour for cooling the 3 reactors, and that 13 tons of this will be made up from the decontaminated water. The recycling system operates for only 90 minutes before it is halted due to a burst connection which leaks about one ton of water. Wednesday, 29 June TEPCO reports that tellurium-129m is found at 720 becquerels per litre of seawater collected on 4 June, detected near the water intake for the reactor 1; about 2.4 times safe levels. Though tellurium-129m has a short half-life of about 34 days, TEPCO denied that its detection indicated the possibility of a new leak of radioactive water into the sea. Thursday, 30 June The Itabashi Ward Office announces that a concentration of caesium-134 at 2,700 becquerels per kilogram – in excess of the government's provisional limit – was detected in tea processed from leaves picked on 9 May in Tokyo. July 2011 Sunday, 3 July The water decontamination and water recycling systems are now both functional. 100% recycled water is now used for reactor cooling, and no additional volume of contaminated water is being generated. Monday, 4 July Radioactive caesium-137 is found in Tokyo's tap water for the first time since April. Radioactive caesium from Fukushima was expected to enter the Japanese seafood supply, and was projected to reach