When I buy/sell Commercial properties (Retail) in Florida, 99% of the time, I have to do an Environmental Phase 1 report to ensure there aren't any contamination liabilities with the land. 

I'm currently buying a 15,000 SF residential lot with the goal of building a 4 unit multifamily apartment on it. What kind of reports should I do to the parcel to ensure I can build on it? 

Thank you!