Following the occurrence of the Niigata-Chuetsu-Oki Earthquake on July 16, 2007, 
The Tokyo Electric Power Company, Incorporated (TEPCO) has decided to conduct 
geological surveys in land and sea areas adjoining the Fukushima Daiichi and Daini 
Nuclear Power Stations in a bid to supplement geological surveys conducted in the 
past and to enhance our knowledge. The plan calls for the execution of subsurface 
exploration in a land area adjoining the nuclear power stations, a maritime sonic 
prospecting in an adjoining sea area and boring surveys on the station premises.
(Announced on Aug. 17th 2007)

TEPCO has wrapped up plans of boring surveys and other activities to be executed 
on the premises of the Fukushima Daiichi and Daini Nuclear Power Stations. We will 
launch preparatory work on November 5th, 2007.
In the survey, TEPCO will conduct boring surveys, groundwater level observation, 
and ground properties profiling in order to investigate soil characteristics on 
the station premises. The results will be reflected on seismic safety assessment. 
In addition, we will survey a part of a land area adjoining the nuclear power 
stations.

TEPCO plans to start conducting the planned subsurface exploration in the land area 
adjoining the nuclear power stations and maritime sonic prospecting in the adjoining 
water area as soon as survey plans are fixed and preparatory arrangements are finished.

Appendix: Implementation of Geological and Ground Surveys at the Fukushima Daiichi and Daini 
          Nuclear Power Stations following the Niigata-Chuetsu-Oki Earthquake(PDF 177KB)