Check the crawlspace underneath the low points and you will probably discover that the piers have sunk into the ground.

Hi Ellie,I was the Analyst for a property in Boston that had slight soil settlement and required an engineers report for further evaluation after the Appraisal was done (which was made "subject to" the engineer report).

Considering a 10+ unit residential commercial property if one already owns the land, has everything else in order: civil engineering, soil survey, Phase I, and architectural blueprints...if the owner was forced to sell due to lack of financing and or some other reason does having those things necessarily increase the value of the vacant land?

Oil tank removal and remediation should be the seller's responsibility, not yours, UNLESS you're a very experienced investor getting a tremendous deal sold strictly "as is" where you've waived all your inspection rights.The worst case could be significant soil contamination requiring thousands of dollars in remediation, followed by soil and ground water tests by the state of NJ.

Or will the floor fall out from underneath us?

Usually, the excessive moisture is caused by a leak in the plumbing system underneath the floors and it is usually a hot water pipe leaking.I am a contractor and sometimes I find that the clothes dryer vent is broken somewhere and all the steam coming from the clothes as they dry is going inside the house and collecting on the cool glass windows.You can hire a contractor to look for a leak, or you can purchase a hydrometer online.

It also makes it extremely difficult to get a loan as the business when you do not own the soil. 

It is just 5min driving from the downtown.There is actually an old mine on the land :) You have a road who cross the land (2 access to the land) City water underneath of this road.

Federal wetlands are evaluated using three criteria- vegetation, soil and hydrology.

Would like to know the lot size , utilities , any soils reports?