At the direction of the Ventura County Board of Supervisors, the Catalyst Setback Study provides a comprehensive description of: (1) regulatory framework applicable to oil and gas development at federal, state, regional, and local level; (2) compilation of all setbacks in the state of California and Colorado, including critical review of the technical basis for such setbacks; (3) critical review of the peer reviewed and grey literature bearing on public health and nuisance conditions related to oil and gas development in proximity to sensitive uses; and (4) critical review of the use of the Air Toxics Hot Spot (AB-2588) data for all oil and gas facilities in the County.