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.
People in Flint may be a bit wary of drinking water from their taps these days. Several boil water advisories have been issued in the past month, after tests showed potential problems with bacteria. The latest pair of advisories were lifted last week. Howard Croft is Flintâs public works director. He says the problems are due to Flintâs aging infrastructure. Croft says the latest problem was connected to a broken water valve in a section of pipe crews repaired earlier this year. He says there are ten thousand water valves in Flintâs ancient water system. Croft says replacing them will take a long time.