"Chevron Corp. has come out swinging in its fight to continue drilling in the deep waters of the Gulf of Mexico, arguing that not all oil firms should be tarred with the brush of BP PLC's Deepwater Horizon disaster." Meanwhile, "Emergency workers believe they have stopped a 21,000-gallon oil leak [from a Chevron pipeline] from reaching the environmentally sensitive Great Salt Lake, one of the West's most important inland water bodies for migratory birds that use it as a place to rest, eat and breed. But the spill has taken a toll on wildlife at area creeks and ponds, coating about 300 birds with oil and possibly threatening an endangered fish. The leak began Friday night when an underground Chevron Corp. pipeline in the mountains near the University of Utah broke. The breach sent oil into a creek that flows through neighborhoods, into a popular Salt Lake City park, and ultimately into the Jordan River, which flows into the Great Salt Lake."