By: M. Whitney Jr. - Sun, 22 Apr 2012 23:28:07 -0800
SAN FRANCISCO (AP) -A document just revealed by Pacific Gas & Electric Co. to California pipeline regulators indicates the company noted weld defects on the same line that exploded in San Bruno in 2010 years before the fatal blast occurred.
The San Francisco Chronicle reports that a March 1989 memo summarized an investigation into a leak about 9 miles south of where the 2010 explosion occurred, killing 8 people and destroyed 38 homes.
The memo said an investigation had determined the likely cause of the October 1988 leak was a defective seam weld: the same problem that contributed to the San Bruno blast.
PG&E said the findings of the 1989 leak investigation were not definitive, and therefore did not require it to test the entire 51-mile-long pipeline.
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