Here are two high-res photos of the location dated August 4, 2011, captions by TEPCO:
Stack drain pipe of exhaust stack of Units 1 and 2, Fukushima Daiichi Nuclear Power Station(from east side) (pictured on August 4,2011)
http://www.tepco.co.jp/en/news/110311/images/110805_1.jpg
Stack...