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.
That's more than 10 times the EPA limit. It's 30 times higher than the 5 ppb reading that can indicate unsafe lead amounts. But that 158 ppb reading is far from the worst one that turned up in Flint, unfortunately. In the spring of 2015, city officials tested water in the home of LeeAnne Walters, a stay-at-home mother of four and a Navy wife.