Johnson & Johnson had a semi mature oak on their grounds close to their only pedestrian access footpath to their site.
PGSD identified a suspect looking pair of cavities on the trunk of the oak. We recommended that a Resistograph was undertaken which would show, via the resistance of penetrating a special drill bit, if there were any cavities within the trunk. Having undertaken the Resistograph we recommended that the tree needed to be removed as a matter of urgency.
Having already undertaken a TPO check with the local authority, the PGSD tree team was deployed the following day to dismantle the oak tree and leave the wood stacked in habitat piles.
Once the tree had been dismantled, we were able to see the extent of decay present within trunk. The cavities and decay were on the sweet spot of the trunk. This is the worse place the decay could have been as this section is where the greatest amount of stress is placed on the tree.
The amount of decay present had a diameter of 40cm, the diameter of the tree was only 60cm, the linear length of decay was approximately 200cm.
