Here is the big fail:
"In the event of a health emergency at this
independent living community, our practice is to immediately call emergency medical personnel for assistance and to wait with the individual needing attention until such personnel arrives.
An independent living community is apartment type housing for older people.
Generally, there is no nursing staff at an apartment building unless a nurse is privately hired by an occupant of the apartment building.
Did the person who called 911 identify herself as a nurse?
Unless california is the most backwards state there, is which it very well could be, nurses have a legal duty to rescue/render aid.
It's like with a lifeguard at a pool. If someone is drowning, the lifeguard is obligated to save them, they have a legal duty to do so. A parent as a legal duty to save their child, but a complete stranger typicall doesn't have a legal duty to save a stranger. But a nurse isn't a stranger.