http://www.nytimes.com/2011/12/02/us/drilling-down-fighting-over-oil-and-gas-well-leases.html?_r=1&partner=rss&emc=rss&pagewanted=printExcerpts:
"Learning Too Late of Perils in Gas Well LeasesBy
After Scott Ely and his father talked with salesmen from an energy company about signing the lease allowing gas drilling on their land in northeastern Pennsylvania, he said he felt certain it required the company to leave the property as good as new. So Mr. Ely said he was surprised several years later when the drilling company, Cabot Oil and Gas, informed them that rather than draining and hauling away the toxic drilling sludge stored in large waste ponds on the property, it would leave the waste, cover it with dirt and seed the area with grass. He knew that waste pond liners can leak, seeping contaminated waste.
...Energy company officials say that standard leases include language that protects landowners. But a review of more than 111,000 leases, addenda and related documents by The New York Times suggests otherwise:
¶ Fewer than half the leases require companies to compensate landowners for water contamination after drilling begins. And only about half the documents have language that lawyers suggest should be included to require payment for damages to livestock or crops.
¶ Most leases grant gas companies broad rights to decide where they can cut down trees, store chemicals, build roads and drill. Companies are also permitted to operate generators and spotlights through the night near homes during drilling... "