11.   On Monday night, officials said company representatives were at the scene and working with the authorities to remove the chemicals.

12.   Once the chemical is removed, the polymers shrink back to normal.

13.   The Defense Department is closing unneeded military bases and must remove chemicals and other types of contamination before the land can be turned over for civilian use.

14.   They did not wear protective gear and did not remove chemicals, he said.

15.   This has led to several successful pilot projects in which artificial wetlands removed the chemical from water that had flowed under military firing ranges.

16.   Unregulated use can let herbicides slip through treatment plants, which cannot remove the chemicals from tap water.

17.   Environmental officials were removing the chemicals from the truck and have checked the surrounding area and found no evidence of contamination, Perez said.

18.   He said studies have proved that removing all chemicals is helpful in enhancing diversity.

19.   He said these chemicals were removed after they were found, but there is still a need for better employee training.

20.   The forest was closed Friday and may remain shut for weeks, while investigators collect evidence and remove hazardous chemicals.