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ARCO - Alegria

Winter storm erosion (January 2005)

Final Site Restoration (September 2006)


What's New

  • A Supplemental Site Assessment Report was completed in May 2012 (a Soil Sampling Site Assessment Report was completed in August 2010), which included the ARCO Alegria site as well as areas owned by adjacent operators, Gaviota Terminal Company and Plains Pipeline Company.  This information will be used to determine the extent of site contamination for development of a site remedial action plan for all three company sites. Once a remedial plan is identified, additional environmental review will be conducted and the Demolition and Restoration (D&R) permit issued for the ARCO Alegria site will be modified.

  • Regular site monitoring will continue to be conducted by the County EQAP to monitor erosion control and vegetation maintenance upon an overall Gaviota Terminal Site Assessment.


This site once housed two 1000-barrel crude oil processing tanks. The tanks were removed in 2003 and site cleanup and restoration is ongoing.


The ARCO Alegria tank farm is located on the ocean side of U.S. 101 in Alcatraz Canyon, approximately 30 miles west of the City of Santa Barbara. The facility occupies approximately one acre of land within the Gaviota Terminal on the western side of Alcatraz Creek.

Gas and Facilities map
Arco-Alegria Location
Arco-Alegria Overhead
Overhead View of the Gaviota Oil Terminal with ARCO's Alegria Facility (arrow)

Onshore Facilities

  • The ARCO Alegria facility consists of an idle oil and gas processing facility and tank battery.
  • The ARCO facility at the time of shut down was primarily comprised of two bermed above-ground 1000-barrel tanks, gas traps, compressors, controllers, and associated piping.
  • The facility, including piping, has been idle since the well that it serviced was shut-in in 1991.
  • The flowlines previously continued offshore, connecting the ARCO facility to its one oil well (State 2793-1) in the Alegria Offshore field, however the offshore portion of the lines were removed during the SWARS project and the lines along the beach were inadvertently taken out during the Chevron/ AERA Flowline Removal Project in 1999.

Cleanup Activities

  • ARCO began the soil remediation phase of decommissioning in late September 2004. Work to remove hydrocarbons, lead, mercury and other associated contaminants was completed on November 18, 2005 and the initial site restoration and temporary revegetation was completed on December 18, 2004.
  • ARCO began the decommissioning of their Alegria facility January 28, 2003 which took five working days to complete. Soil and groundwater sampling began in February 2003. Remedial action, site restoration and revegation to pre-project condition are scheduled to be completed after approval of a Remedial Action Plan for the Gaviota Terminal Abandonment Project (DRP-00000-00003).
  • The Coastal Development Permit for the ARCO Alegria Decommissioning Project was issued on December 16, 2002 (no appeals were filed). The project is located within the Gaviota Marine Terminal and includes removal of the Alegria Facility; removal of above and below ground structures and piping associated with the facility (approximately 750’ of flowlines); and site assessment, remediation, and restoration.
  • ARCO Environmental Remediation LLC is authorized to remove above- and below- ground structures associated with the Alegria Facility and to perform site assessment, remediation, and restoration.
  • The facility, including piping, has been idle since the well that it serviced was shut-in in 1991.

Past Activities

  • While petroleum industry activities have taken place in the Gaviota Terminal since the late 1800s, the predecessors of British Petroleum did not develop the ARCO Alegria property until 1962.
  • Modification of the facility since original development consists solely of the occasional replacement of equipment for like equipment due to wear and tear and possible minor alterations due to varying well flow characteristics.
  • During the active life of this facility, it was used for the processing of produced oil, gas, and water.
    • The produced oil, natural gas, and water was transported by pipeline into the facility.
    • The gas and liquids were then separated from each other with the liquids (crude oil and produced water) being sent to the 1000 barrel storage tanks.
    • The gas was dehydrated, compressed, and piped back offshore for gas lifting the producing oil well, and residual gas was sold via pipeline.
    • After the liquids were sent to the tanks, the water was bled off the bottom of the tanks, disposed of and the oil was sold.
  • On January 15, 2002, ARCO Environmental Remediation LLC requested permit approval from the Energy Division for the decommissioning of ARCO's Alegria facility and associated onshore piping located within the Gaviota Marine Terminal

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