Question: Where is the headquarters of the company responsible for the Red Butte oil spill?
Context: Efforts to stem the "Deepwater Horizon" oil spill were ongoing from the time that the "Deepwater Horizon" exploded on April 20, 2010 until the well was sealed by a cap on July 15, 2010.  Various species of dolphins and other mammals (61 casualties), birds (2,095 casualties), and the endangered sea turtles (467 casualties) have been killed either directly or indirectly by the oil spill.  The "Deepwater Horizon" spill has surpassed in volume the 1989 "Exxon Valdez" oil spill as the largest ever to originate in U.S.-controlled waters; it is comparable to the 1979 Ixtoc I oil spill in total volume released (Ixtoc discharged 140 e6USgal to 148 e6USgal ; as of mid-July 2010, Deepwater Horizon has spilled 90 e6USgal to 180 e6USgal ). The Mingbulak oil spill also known as the Fergana Valley oil spill was the worst terrestrial oil spill in the history of Asia.  The oil spill was caused by a blowout on March 2, 1992 at the Mingbulak oil field in the Fergana Valley, Uzbekistan at well #5.  The Crude oil released from the well burned for two months.  The blowout resulted in the release of 35000 oilbbl to 150000 oilbbl per day.  In total, 2000000 oilbbl were collected behind emergency dykes.  The oil stopped flowing by itself.  A total of 285,000 tons of oil were released, and it was the fifth largest oil spill in history.  The spill is considered the largest inland spill in history. Red Butte Creek is a small stream whose headwaters are found in the northeast part of Salt Lake County, Utah.  It flows west through the Red Butte Garden and Arboretum, by the University of Utah, Fort Douglas and flows southwesterly through Salt Lake City’s Liberty Park before forming a confluence with the Jordan River.  Consisting of 7.25 mi2 of watershed, Red Butte Canyon is the smallest canyon of the seven canyons in eastern Salt Lake County.  Its elevation ranges from 5000 to above sea level. The Prudhoe Bay oil spill (2006 Alaskan oil spill) was an oil spill that was discovered on March 2, 2006 at a pipeline owned by BP Exploration, Alaska (BPXA) in western Prudhoe Bay, Alaska.  Initial estimates of the five-day leak said that up to 267000 USgal were spilled over 1.9 acre , making it the largest oil spill on Alaska's north slope to date.  Alaska's unified command ratified the volume of crude oil spilled as 212252 USgal in March 2008.  The spill originated from a 0.25 in hole in a 34 in diameter pipeline.  The pipeline was decommissioned and later replaced with a 20 in diameter pipeline with its own pipeline inspection gauge (pig) launch and recovery sites for easier inspection. The Red Butte Creek oil spill was caused by a rupture in a medium crude oil pipeline that occurred on June 11 and 12 2010.  The Chevron Pipeline (CPL) is 10 inches in diameter and runs from western Colorado to a Chevron Corporation oil refinery near Salt Lake City Utah.  A half inch diameter hole in the pipeline was caused by an electrical arc from high voltage power lines to a metal fence post buried a few inches above the pipeline. The MT "Hebei Spirit" oil spill was a major oil spill in South Korea that began on the morning of 7 December 2007 local time, with ongoing environmental and economic effects.  Government officials called it South Korea's worst oil spill ever, surpassing a spill that took place in 1995.  This oil spill was about one-third of the size of the "Exxon Valdez" oil spill. Red Butte Wilderness is a 1537 acres wilderness area in the US state of Utah.  It was designated March 30, 2009, as part of the Omnibus Public Land Management Act of 2009.  Located adjacent to Kolob Canyons section of Zion National Park, it encompasses and protects much of the 1800 ft Red Butte.  Red Butte Wilderness is bordered by the Zion Wilderness to the north. The following is a timeline of the "Deepwater Horizon" oil spill (also referred to as the BP oil spill, the Gulf of Mexico oil spill or the Macondo blowout).  It was a massive oil spill in the Gulf of Mexico, the largest offshore spill in U.S. history.  It was a result of the well blowout that began with the "Deepwater Horizon" drilling rig explosion on April 20, 2010. The "Deepwater Horizon" oil spill (also referred to as the BP oil spill, the BP oil disaster, the Gulf of Mexico oil spill, and the Macondo blowout) began on April 20, 2010, in the Gulf of Mexico on the BP-operated Macondo Prospect.  Killing eleven people, it is considered the largest marine oil spill in the history of the petroleum industry and estimated to be 8% to 31% larger in volume than the previous largest, the Ixtoc I oil spill.  The US Government estimated the total discharge at 4.9 Moilbbl .  After several failed efforts to contain the flow, the well was declared sealed on September 19, 2010.  Reports in early 2012 indicated that the well site was still leaking. Chevron Corporation () is an American multinational energy corporation.  One of the successor companies of Standard Oil, it is headquartered in San Ramon, California, and active in more than 180 countries.  Chevron is engaged in every aspect of the oil, natural gas, and geothermal energy industries, including hydrocarbon exploration and production; refining, marketing and transport; chemicals manufacturing and sales; and power generation.  Chevron is one of the world's largest oil companies; as of 2014 , it ranked third in the Fortune 500 list of the top US closely held and public corporations and sixteenth on the Fortune Global 500 list of the top 500 corporations worldwide.  It was also one of the Seven Sisters that dominated the global petroleum industry from the mid-1940s to the 1970s.
Answer: San Ramon, California