Why are you so keen to whitewash potential mishandling of dangerous chemicals and poisoning of the public?
You do not appear to have any more understanding of the situation that a layman. Your points to do not sound convincing and do not engage with the issue at all.
> How is it this woman was nearly killed, while the employees who WORK in the building are perfectly healthy
This is quite ignorant of how this actually works. How is it possible that Union carbide plant in Bhopal killed 16,000 people in one day but most employees were perfectly healthy?
> the next door businesses have no sick employees other thousands of residents in the apartment building are also not sick?
You are obviously wrong, have you ever tried going around your neighbourhood and asking people: "hey, there has been consistent release of dangerous chemicals, is anyone sick?". That's a population of thousands of people, dozens of people will have bronchitis, asthma, inflammation, cancer, god knows what. How do you know if it is related to the chemical pollution?
Perhaps dozens of people have felt symptoms and went to the doctor, and maybe they were diagnosed with Asthma or allergies or some other erroneous disease. Maybe they moved to the countryside by now, believing themselves to be ill.
Unless someone knocks on the door, polls the residents, takes blood samples and tests them at an independent lab, conducts statistical analysis of all the medical records, etc. you have no moral right to assert this.