BEAUMONT, CALIFORNIA

HISTORY

Home to two Lockheed Martin heritage company sites: Potrero Canyon and Laborde Canyon.

Both locations used to produce and test solid rocket propellant and motors in the 1960s and early 1970s. Potrero Canyon was also used for weapons and ballistics testing. Contamination was found at both sites.

POTRERO CANYON – BACKGROUND

  • Contaminants currently pose no threat to drinking water in the San Jacinto Valley.
  • 9,117-acre remote site in south Beaumont.
  • Principal industrial activities occurred in nine (9) areas.
  • Extensive investigations identified contaminants resulting from past operations.
  • Compounds of potential concern include chlorinated solvents, perchlorate, and 1,4-dioxane.
  • Approximately 182 observation wells, groundwater-monitoring wells and extraction wells in place.

POTRERO CANYON - TIMELINE

  • 1986 and 2002 - Major cleanup activities. 
  • 1994 to 2002 - Groundwater treatment system operated at rocket-motor production area.
  • 2002 - Newly regulated chemicals identified at the site; groundwater treatment system shut down while additional investigations conducted and remediation options reviewed.
  • 2003 - 8,552 acres sold to State of California; now managed by California Department of Fish and Wildlife. Lockheed Martin retains a 565-acre conservation easement.
  • 2014 - Proposed Remedial Action Plan (“RAP”) submitted to California Department of Toxic Substance Control.
  • 2015 - Public review of proposed RAP conducted.

 

POTRERO CANYON - TODAY

  • Lockheed Martin provides general awareness training for local and state government officials and first-responders to recognize, retreat, and report for projectiles and residual explosives.
  • Dummy projectiles and residual explosives may remain in areas where munitions testing took place. Warning signs are posted and an informational kiosk is located at entrance.

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LABORDE CANYON – BACKGROUND

  • Contaminants currently pose no threat to drinking water in the San Jacinto Valley.
  • 2,668 acres southwest of Beaumont in the San Timoteo Badlands.
  •  Approximately 75 observation wells, groundwater-monitoring wells and extraction wells in place.
  • Compounds of potential concern include chlorinated solvents, perchlorate, 1,4-dioxane, lead and zinc.
  • Principal industrial activities occurred in five (5) areas of operation.

LABORDE CANYON - TIMELINE

  • 1974 - Lockheed Martin operations ceased; additional activities conducted by  non-Lockheed Martin companies in the 1970s and 80s.
  • 1984 - Initial cleanup: PCB-contaminated asphalt and associated sand and gravel removed.
  • 1994 - 800 tons of waste removed from Garbage Disposal Area.
  • 2003 - Additional environmental investigations and evaluations began. Soil samples collected at various depths in 114 locations.
  • 2006 - Site sold to Riverside County.
  • 2014 - Proposed Remedial Action Plan (“RAP”) submitted to California Department of Toxic Substances Control.
  • 2016 - Public review of RAP scheduled.

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GLOSSARY

View a list of terms commonly used in relation to general environmental remediation efforts that can be found throughout this Web site.

ACRONYMS

View a list of nicknames commonly used in relation to general environmental remediation efforts that can be found throughout this Web site.


If you have questions, please don’t hesitate to contact:

Mékell Mikell,                         Corporate Communications
301-897-6934  Mekell.T.Mikell@lmco.com