An Oklahoma family said an abandoned oil well may have turned their dream home into a toxic hazard after black, oily liquid began bubbling up through the floor. What happened? Mitch and Kara Meredith spent more than a decade saving for their newly built farmhouse in Fort Gibson, Oklahoma. But last summer, only weeks after welcoming their third child, the home suddenly became unlivable. According to ProPublica, the couple initially thought they w…