Unless you have a very odd situation, yours
would be considered one service. Is it one building?
One service requires one grounding electrode system. You said 2 rods. Is there no metal underground water pipe? Is 2 rods a local requirement?
GEC is based on the size of the service.
Where a service consists of more than one enclosure it is permissible to connect taps to the grounding electrode conductor.
The Tap conductors are based on the size of the largest conductors serving that enclosure.
Bonding N-G should only be done once per
service.
