PV plants require large amounts of land. Consequently, there are times when their sites have undulating terrain or soft ground, such as wetlands. At times, such conditions require the construction of ground embankments, earthworks (cut and fill), or other forms of ground improvement. Moreover, impacts from the natural environment surrounding the facility―which can include earthquake damage, storm surges, and falling volcanic ash―can significantly affect a project’s plan. This makes it vitally important to review natural environment risks envisioned at the project site in advance.