The log should indicate all logging and coring intervals, testing intervals and casing/liner seats, and it should carry abbreviated information concerning the geology and testing or shows.
Asesu trefn archwilio reolaidd y ffermwr (cynllun a chofnodion asesu, fel sy’n briodol ar gyfer y storfa a’i rhannau) ac edrych am unrhyw arwydd o rwd, niwed neu ollwng.