By Glen C. Hansen
For decades, oil and gas producers in California have been engaged in the process of hydraulic fracturing, commonly called “fracking.” That process involves injecting a high pressure stream of water and chemicals deep underground to split rocks and release oil and natural gas. The technique is designed to free oil and natural gas trapped in shale rock. There is a significant amount of such rock in California. For example, the Monterey Shale, which lies under Central California and the southern San Joaquin Valley, could hold up to 15 billion barrels of oil, making it possibly the nation’s largest oil shale formation and almost half of the nation’s total shale oil resources.