Here you go (and AP, and Washington Post, and...).
From TEPCO's December 6 press release page:
150 liters of this radioactive strontium-rich water leaked into the ocean from the evaporative condensation apparatus (part of the contaminated water treatment system), via the regular drains.
Strontium-89: 74,000 becquerels/cubic centimeter
Strontium-90: 100,000 becquerels/cubic centimeter
Total amount of radioactive materials (including cesium) that leaked into the ocean this time: 26,000,000,000 becquerels, or 26 billion becquerels.
TEPCO says it is 12% of "annual discharge target control of radioactive liquid waste" at Fukushima I Nuclear Power Plant. That's one way of putting it. Another way is that it is only a fraction of what has already been discharged, to the tune of between 4,700 terabecquerels (TEPCO estimate so far, though the company was to recalculate by the end of November; did it?) and 27,100 terabecquerels (France's IRSN estimate), and these numbers do not include strontium.
For my previous post on this topic, go here and here (more pics).
By the way, the numbers for strontium and other beta nuclides in the contaminated/treated water were released on November 18 by TEPCO. The mention of radioactive strontium was made during the press conference on December 4.
(I guess foreign news correspondents do not attend TEPCO/government press conference any more.)