Seal the deal.

Obviously it will be sealed, but with the gaps and the fact that it's not filled in, it makes things harder to clean.

If so you have a leak.Then find the leak by closing shut off valves one at a time until the meter stops.99% of time it is a toilet flapper/seal, maybe a sink or shower fixture.

The tub has a small leak, but I believe the leak is from the metal drain that has deteriorated and there's a piece of it missing that forms the seal.

free, no charge lawyers to tenants to fight evictions with an ability to make the eviction disappear as a sealed judgement. 

Finally they sealed the cracks and my contractor later applied floor leveler to ready for flooring.With the foundation issue resolved, my contractor removed all the fire damaged wood, cleaned up all the soot and began a general rehab of all remaining issues.

Seal the envelope, this is happening!

Be sure to keep the sealed package when it arrives back and keep all evidence showing you attempted delivery in case 'PITA' decides to go to court.

On almost every window seal is cracked which lets in condensation between each. 

@Mason MoranThe short answer for the gas station question is to see if all environmental reports where filed timely; if there is any evidence of UST leakage; if the tanks were properly sealed when the station went out of business and the cost of tank removal and any related environmental cleanup.