Allegations of fraudulent corrosion testing along the 800-mile trans-Alaska pipeline have prompted the government to order new inspections at 19 sites along the line, and pipeline operators said Friday work will begin this weekend.

The Alyeska Pipeline Service Co., which operates the pipeline for seven oil companies, said it will comply with a government request to dig up sections of pipe to see whether unqualified workers with inadequate equipment failed to conduct proper corrosion tests as alleged by some of the workers themselves.Work will begin "as soon as we can mobilize," Alyeska spokeswoman Marnie Isaacs said. She said the job will cost $500,000.