You comment still not prove that the Navy caused the contamination.  How do you know that it did not come from another source that could or could not be on your property.  There are other sources for those chemicals.
I grew up near Hamilton AFB and there never was an announcement about flight ops. Somehow I survived that noise of the F-86 Sabre Jets. 
I know that the DoD or the DOE will reimburse school districts that have military related school children. How fast that occurs is beyond yours or my control.