I recently moved into an apartment building in La Mesa, CA. Every night, and sometimes during the day, the smell of marijuana comes wafting in through the bathroom ceiling vent and stinks up my whole apartment. I've also had bugs (they look like termites) coming out of that same bathroom vent (they are nowhere else in my apartment). I've found out that the tenants in the two apartments directly beneath mine are major smokers, and I've seen the exact same bugs in one of their windows. It's clear that our venting system is connected in the building. I am getting very frustrated with the situation because the smell makes me nauseous and gives me headaches, and I certainly don't want termites in my apartment with lots of custom wood furniture.
My question is...isn't there some kind of code stating that the venting system can't be connected? I understand that sometimes the smell can penetrate the walls, but this is extremely strong, it is coming in directly through the venting. Is there anything my landlord is required to do in order to prevent this?
Info on the building: It's a 2-story building, I am on the 2nd floor. There are 8 units connected in my section of the building complex. The building is a bit old from what I can tell, maybe 1960-1970's? (I'm bad at judging that).