Construction Materials and Lack of QA Tests Linked to Oil Well Failure

The cement that was supposed to close up the hole of the BP oil well off the Gulf of Mexico was incompetent.

The following article from the Los Angeles Times explains how the cement and lack of QA tests may have been one of the leading causes in this catastrophe:

http://www.latimes.com/news/science/la-na-oil-spill-cause-20100512,0,7025051.story