The definition of “remote” in the amended regulation is:
A workplace to which, under normal travel conditions, an ambulance that is a motor vehicle cannot travel from its base in 30 minutes or less but does not include a ferry.
An ambulance base means an ambulance station; therefore, you cannot calculate the distance to/from your worksite to the nearest hospital.
Note: If the distance from the nearest ambulance station to your worksite is impacting you by moving you into a different workplace class (due to now being considered remote), then the distance from the nearest hospital would (e.g., from Class 1 to Class 2), you may consider applying for a variance.