(February 1, 2016, 9:17 AM EST) -- PHILADELPHIA — A member of the research team at Virginia Polytechnic Institute and State University (Virginia Tech) that has been investigating the reason behind the lead contamination in the drinking water in Flint, Mich., on Jan. 23 wrote a letter to residents of Philadelphia offering “some tools to look into the safety of your drinking water in an informed and valid way,” based on what the team member says are confusing claims published in newspapers regarding the safety of the city’s drinking water....