it's difficult to tell faults from a topographic map and ideally you should do a survey with a geologist. I can not pick out any fault traces from this map, but a quick way to assess these thing from my home is to delve into google Earth. I looked up the location in the Philippines and overlayed the google map satellite imagery attachment 1.
What you might need to consider when zooming out and overlaying the earthquakes that have been recorded over the last couple of years is that you might be above an active fault zone. See attachment 2 and the green line.
Most earthquakes in the area follow a mayor trend and have a strength of around 5. The originated between 15 and 30 km deep and are probably related with some sort of deep rooted fault zone or subduction zone. For now this would be the only thing I can allert you on and you might already know this. Again, this is not my expertise, but I just want to help as I enjoy geology and tackling these problems.
Hope this helped your survey!