Historical Significant Risk Facility
|Location:||Cat Canyon Oil Field|
|Contact Person:||Susan Whalen|
(805) 347-8700 ext. 205
|Facility Description:||The facility is located in the Cat Canyon Oil Field south and east of Santa Maria, CA. Active wells at the facility produce oil, gas, and waste water. These products are gathered via pipeline, separated, stored, and metered. The oil and gas are transported out of the facility via pipelines. The waste water is disposed by underground injection on-site.|
Click on the thumbnails below to see full size photos of the facility.
|Greka Cat Canyon facility||Heating/separating unit||Pumping unit|
The Greka South Cat Canyon facility produces, treats, stores, and ships oil and gas. These processes involve equipment (tanks, internal combustion engines, boilers, dehydrators) that emits toxic air contaminants. Additionally, fugitive hydrocarbons, which contain certain toxic air contaminants, are emitted from the piping, connections, and other plumbing on the site.
These are the results of the health risk assessments (HRAs) performed on toxic emission inventories from 1991, 1994 and 1998 and 2003.
The health risk assessment report for 2003 is available here: 2003 HRA.
The health risk assessment files are available from the District by submitting a Public Records Act Request (please specify inventory year).
Increased cancer risk is expressed as the number of individuals affected in a hypothetical population of one million. A significant risk is defined as 10 in one million or greater.
Non-cancer acute (short-term) and chronic (long-term) related illnesses are conveyed in terms of the Hazard Index (HI). The HI is a ratio of the predicted concentration of the facility’s reported emissions to a concentration considered acceptable to public health professionals. A significant risk is defined as an HI of 1 or greater.
The risk footprints are maps of the area affected. The facility is required to notify the people living within the footprints. Footprints are only prepared for significant risks. The footprints will change as the facility reduces its emissions and may not reflect the current risk footprint.
|Cancer risk:||63 in a million|
|13 in a million|
|12 in a million|
|8.33 in million|
|8.33 in million|
|Acute non-cancer risk:||HI = 0.3|
|HI = 1.8|
|HI = 22.93|
|HI = 3.44|
|HI = 0.72|
|Chronic non-cancer risk:||HI = 0.8|
|HI = 1.2|
|HI = 0.27|
|HI = 0.03|
|HI = 0.03|
* Current risk results are based the 2003 Inventory Year after risk reduction measures were applied. See Risk Reduction section below for more information on the risk reduction measures implemented.
Risk “Driver” Pollutants
Acrolein and formaldehyde are the risk driver pollutants for the acute non-cancer risk. The primary risk driving devices are field gas-fired internal combustion engines.
Acute non-cancer risk:
acrolein (endpoint = eyes)
For more information on specific toxic pollutants, see USEPA Unified Air Toxics Web Site Health Effects Notebook for Hazardous Air Pollutants.
Other Toxic Pollutants Emitted by this Facility
The following pollutants are emitted during oil processing, storage, and transfer, but are not the primary contributors to the facility’s significant risk status.
|carbon tetrachloride||polycyclic aromatic hyrocarbon (PAH)|
The primary goal of notification under the Air Toxics “Hot Spots” Program is to inform potentially exposed individuals of significant health risks associated with toxic air emissions routinely released from facilities in Santa Barbara County. The first public notification letter for this facility was sent to the affected public on April 26, 1999. Public notification was not required for the 2003 inventory year as the only significant risk was on a public roadway. No residents or businesses are within the significant risk isopleth.
Because this facility’s health risk assessment indicated a significant risk, the facility operator was required to conduct an airborne toxic risk reduction audit and develop a plan to implement airborne toxic risk reduction measures.
The Greka South Cat Canyon facility submitted a Risk Reduction Audit and Plan on March 12, 2014. This plan was conditionally approved by the District on March 28, 2014. The conditional approval required that Greka submit a permit application for the permanent removal of five internal combustion engines. The permit application was submitted on July 7, 2014. T he District issued the final permit (ATC/PTO 14440) on October 24, 2014. Through the issuance of ATC/PTO 14440, the RRAP was fully implemented and Greka South Cat Canyon facility’s risk was reduced below the District’s significance thresholds.