Washington Post, Jan 16 - Researchers who conducted a street-by-street survey of the District found nearly 6,000 natural gas leaks from the city's aging pipe system, including 12 in manholes where methane had collected to potentially explosive levels, according to a study published Thursday.
The team, after warning Washington Gas about those 12 locations, retested them four months later and discovered eight places where the gas buildup was still at concentrations that could cause explosions.
