There is black smoke coming from the chimney of a neighboring building with a dull chemical smell. I am on the top floor and can smell the odor in my apartment with the A/C running -- it's giving me a massive headache. I'm new to apartment living so unsure how common this type of odor is and if it's normal when an oil burner kicks in after a summer of non-use. I researched the cause of such a smell
, and it appears there may be a faulty HVAC system in the building next door. Not sure of next steps and who I should alert. Any advice is welcome.