But the air, land and water pollution issues are very challenging.

My environmental science professor would be happy. 

The environmental inspection company did not really provide a suggestion for remediation... however they did mention that it was a potential human health risk.

As @Karen Margrave stated zoning, environmental and regulatory issues make it difficult for the newbie.Some zoning is anti-development. 

The house of course is being sold as is but for an environmental hazard, I didn't know if there were specific rules around that. 

We have earthquake, coastal, environmental, you name it, and plans have to deal with it, so very specific to each lot. 

As for environmental study, what is it for and why one bank asks for it and another one does not?

And all the other environmental and mechanical issues mentioned already. 

Secondly,  environmental issues.

All federal agencies utilize the tax code to make business applications, for example, someone who pollutes a river who is not in the business of doing the activity that caused the pollution ends up with a smaller fine, those who are in the business are then subject to much greater penalties for the violations.Folks might begin here starting a business and to see when and why dealing with the public is different than doing an occasional activity for themselves, like holding a garage sale. https://www.sba.gov/starting-business/learn-about-...:)PS: More bad news, someone who loans money or does an installment sale are bared from charging points, loan fees or other fees except for interest and late payment fees, why?