It has continued through today though they cannot pinpoint the exact site of the tank's leak.
Fukushima's Vice Governor Yuhei Sato has declared it a national emergency and is asking the central government to take action immediately on the ever worsening situation.
From the Malay Mail Online:
TEPCO admitted the toxic water might contaminate groundwater and flow into the Pacific Ocean "in the longer term", but said it was working to avoid such a situation.Tokyo Electric Power Company has released information on the composition of the leak here.
"We are transferring the contaminated water from a tank with a leakage problem to unbroken tanks, and retrieving leaked water and soil around it," the spokesman said.
"We are also beefing up existing earth-fill dams around tanks," he said, as the region braces for heavy rain later on Tuesday.
So far four tonnes of the spilled water had been retrieved since Monday evening when TEPCO started the recovery operation, the company said.
TEPCO has faced a growing catalogue of incidents at the plant including several leaks of radioactive water, following the worst nuclear disaster in a generation.
Honestly, every day it gets a bit worse.