is this company responsible for environmental negligence?
Yes, It has been accused of extensive environmental damage from these operations, and faces legal claims from both private plaintiffs and the government of Ecuador.
Texaco
From 1965–1993, Texaco participated in a consortium to develop the Lago Agrio oil field in Ecuador. It has been accused of extensive environmental damage from these operations, and faces legal claims from both private plaintiffs and the government of Ecuador. The case has been widely publicized by environmental activists and is the subject of "Crude", a 
what is 'texas oil boom' all about? It was a period of dramatic change and economic growth in the U.S. state of Texas during the early 20th century that began with the discovery of a large petroleum reserve near Beaumont, Texas. name a few companies that drilled for oil in that region. Texaco, Gulf Oil Corporation and the Magnolia Petroleum Company. what other economic developments took place in that state due to this boom? Industrialization - Chemical plants, steel factories, cement plants, automobile manufacturing, and many other types of heavy industry that could benefit from a ready supply of cheap fuel rapidly developed in the area. you had mentioned 3 companies that drilled for oil in that area, when was that first company formed? 1901. who are its founders? Jim Hogg, Joseph S. Cullinan, John Warne Gates, and Arnold Schlaet. where is it headquartered in? Westchester County, New York.
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Texaco [SEP] Environmental issues
From 1965–1993, Texaco participated in a consortium to develop the Lago Agrio oil field in Ecuador. It has been accused of extensive environmental damage from these operations, and faces legal claims from both private plaintiffs and the government of Ecuador. The case has been widely publicized by environmental activists and is the subject of "Crude", a 2009 documentary film by Joe Berlinger. Chevron claims that it is being unfairly targeted as a deep pocket defendant, when the actual responsibility lies with the government and its national oil company, Petroecuador.