At the request of Rep. John Dingell, D-Mich, the General Accounting Office will conduct a new investigation of the Office of Pipeline Safety and "the adequacy of its regulation" of the nation's network of natural gas and hazardous liquid pipelines. This is the second time in recent years that the office, which is Congress' investigative arm, has examined the pipeline agency at Dingell's request. The latest report, dated September 2001 and entitled "PIPELINE SAFETY – Progress Made, but Significant Requirements and Recommendations Not Yet Complete", can be downloaded from RCP's website here.