Hi EnxAero I'm not sure that is the right chart to use. That "Type A" chart is mainly used for take-offs. So that particular chart is actually for RWY 3 departures instead of RWY 21 arrivals. The maximum heights shown on that chart may (or may not) actually be on the relatively narrow localizer path.
There is another ICAO chart called the "Precision Approach Terrain Chart" for use with CAT II and III approaches.
This "PATC" chart is used to asses any terrain which may impact the Radio Altimeter, but only to a maximum distance of 2000 meters. So basically, anything over 2000 meters gets ignored.
PATC for LECO RWY 21:
http://www.aena.es/csee/ccurl/341/10...CO_PATC_en.pdf.