When Francisco Gonzales moved to the town of Arvin, California from the Los Angeles suburbs in 2005, he was captivated by the mountain vistas, the green fields, and orange trees that surround the town. “I thought it would be clean,” he said, pointing to the small housing development where he had invested his retirement savings after decades working as a handyman. Then Francisco points to the oil derrick across the street from him and shrugs.