Expenses a company has when it drills for oil or natural gas. Intangible drilling costs are sometimes convenient for a company's tax purposes because it can deduct intangible drilling costs in one year when the company perhaps found little or no oil from profits made in a different year when the company does find oil.
Bruce Lanphear, a professor at Simon Fraser University and also an expert in lead toxicity, said Edwards not only studies the impact of lead in water, but he makes his testing available to communities in need, like he did in Flint.
Water from the Flint River was found to be highly corrosive to the lead pipes still used in some parts of the city. Even though Flint River water no longer flows through the city's pipes, it's unclear how long those pipes will continue to leach unsafe levels of lead into the tap water supply. Experts currently say the water is safe for bathing, but not drinking.