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

  • 9,117-acre remote site in south Beaumont.
  • 8,552 acres sold to State of California in 2003; now managed by California Department of Fish and Wildlife. Lockheed Martin retains a 565-acre conservation easement.
  • Principal industrial activities occurred in nine (9) areas.
  • Extensive investigations identified contaminants resulting from past operations.
  • Approximately 182 observation wells, groundwater-monitoring wells and extraction wells in place.
  • Compounds of potential concern include chlorinated solvents, perchlorate, and 1,4-dioxane.
  • Major cleanup activities between 1986 and 2002. Groundwater treatment system operated at rocket-motor production area from 1994 to 2002. Approximately 4,100 tons of impacted soil were removed from the former burn pits and shipped off-site for disposal.
  • 2002: Newly regulated chemicals identified at the site; groundwater treatment system shut down while additional investigations conducted and remediation options reviewed.
  • Contaminants currently pose no threat to drinking water in the San Jacinto Valley.

POTRERO CANYON - Today

  • Proposed Remedial Action Plan (“RAP”) submitted to California Department of Toxic Substance Control in 2014.
  • Public review of proposed RAP conducted in 2015.
  • 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. 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.

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LABORDE CANYON – Background

  • 2,668 acres southwest of Beaumont in the San Timoteo Badlands.
  • Lockheed Martin operations ceased in 1974; additional activities conducted by  non-Lockheed Martin companies in the 1970s and 80s.
  • Site sold to Riverside County in 2006.
  • Principal industrial activities occurred in five (5) areas of operation.
  • Initial cleanup in 1984: PCB-contaminated asphalt and associated sand and gravel removed.
  • 1994: 800 tons of waste removed from Garbage Disposal Area.
  • Additional environmental investigations and evaluations began in 2003. Soil samples collected at various depths in 114 locations.
  • 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.
  • Contaminants currently pose no threat to drinking water in the San Jacinto Valley.

LABORDE CANYON - Today

  • Proposed Remedial Action Plan (“RAP”) submitted to California Department of Toxic Substances Control in 2014.
  • Public review of RAP scheduled for late 2015 into early 2016.

 


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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.