If you are in coal country this makes the possibility a bit higher , sometimes a new shaft will change the ground water flow effecting a well .A friend of mine is in Confluence Pa , his well is 1300 feet deep , and it produces 2 gallons per minute , he has 4 Large pressure tanks to have reserve water .

The environmental company stated that there were nosoil vapor issues present on the subject property but there werelow levels of contamination in the ground water.

The National Groundwater association has a site where you can look up contractors by state (I won't say they are the only good contractors because my well guy isn't a member but it is a start) and some states have programs to assist getting drinking systems in line with local regulations.

The HO-3 form however (for dwelling coverage) is an open peril policy, which means any sudden physical damage, subject to certain exclusions such as wear and tear, manufacturer's defect etc.Basically you are covered for a lot more in HO-3, the flood portion you mentioned is irrelevant in either form, ground water is specifically excluded from coverage on both forms.  

Sump pumps usually carry groundwater (clean) back out of the house - not dirty soapy chemical water.

This involves taking soil and groundwater samples.

@Brandon Barnic    Has the depth to groundwater dropped so you don't have the available water volume, is the well dry, or are you not getting the gallons per minute.  

In most of Utah, (a semi-arid desert) a land-owner cannot simply tap into ground water by well or from a stream or river without water rights. 

Boring rig to complete investigation boring to a depth of ground water or refusal, which ever occurs first.

The water is all ground water.