They should provide you with paper evidence of these tests, and be happy to answer all of your questions. (thehappypuppysite.com)
I would demand to see any info backed up with hard paper evidence for insurance policy / broker contact, utilities, city / state inspection reports, etc.. (biggerpockets.com)
We'll research empirical evidence that helps answer the main philosophical question arisen by your paper (thesishelpers.com)