Investigating indoor air quality problems often involves a little detective work. Many of the issues that come up, with a little knowledge, can be resolved by the occupants themselves. Below is a short list of common problems that arise in laboratories and possible solutions. Swamp Gas or Sewer Smell. This is by far the most common problem in all of the university labs.
Most labs have multiple sinks.
If the sinks are not used frequently, the traps dry out and the odors can come up from the drains. Putting water down an unused sink drain on a routine basis can prevent this problem from arising. The odors coming from dry traps can be intermittent. Check to make sure all containers are sealed tightly. Do not pour any hazardous chemicals down the drains.