After the discovery of chemical drums at Bethpage Community Park last year, Oyster Bay officials worried about the presence of hexavalent chromium, a cancer-causing toxin, in the soil near the drums, federal court records show.

They were concerned by what they saw: yellow and green sludge, a sign of chromium contamination, according to a filing in the town's lawsuit against Northrop Grumman, which seeks to accelerate and widen the scope of the plan to clean up the 18-acre property Grumman Aerospace used as a toxic dumping grounds for decades .

The town accused the company of failing to test for the visibly discolored soil, records show.

After Oyster Bay hired a laboratory to test the neon-colored material, the results showed "alarming" and "extremely high levels of hexavalent chromium

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