The Associated Press reported that Chevron Corporation said Wednesday that a Canadian subsidiary and its business partners -- including Exxon Mobil -- have finalized a deal to develop an oil field off the coast of Newfoundland and Labrador. Chevron Canada Ltd. will use a gravity-based structure in the Hebron Field, which contains an estimated 400 million to 700 million barrels of recoverable oil and is located 210 miles offshore in about 300 feet of water. Chevron