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Environmental groups and state regulators have said toxic waste escaped through the use of the open burn pits at Redlands and polluted groundwater, according to the lawsuit. Lockheed said it “has incurred and will continue to incur substantial costs to treat and remove pollutants from the groundwater.”

Contamination traced to rocket fuel also has been found in other states.

Richard Wiles, executive director of the nonprofit District-based Environmental Working Group, testified before Congress in May that perchlorate has leaked from hundreds of military and defense plants nationwide, with reports of contamination in 28 states.