On September 9, 2010, about 6:11 p.m. Pacific daylight time, a 30-inch-diameter segment of an intrastate natural gas transmission pipeline known as Line 132, owned and operated by the Pacific Gas and Electric Company (PG&E), ruptured in a residential area in San Bruno, California. The rupture occurred at mile point 39.28 of Line 132, at the intersection of Earl Avenue and Glenview Drive. The rupture produced a crater about 72 feet long by 26 feet wide. The section of pipe that ruptured, which was about 28 feet long and weighed about 3,000 pounds, was found 100 feet south of the crater. PG&E estimated that 47.6 million standard cubic feet of natural gas was released. The released natural gas ignited, resulting in a fire that destroyed 38 homes and damaged 70. Eight people were killed, many were injured, and many more were evacuated from the area.
The Transportation Security Administration’s (TSA’s) mission includes enhancing the security preparedness of U.S. hazardous liquid and natural gas pipeline systems. This TSA Office of Intelligence (TSA-OI) threat assessment primarily addresses the potential for attacks against the pipeline industry in the Homeland and assesses the tactics, techniques, and procedures (TTPs) used in attacks against pipelines and related infrastructure overseas for their potential use by terrorists in the Homeland.
U.S. hazardous liquids and natural gas pipelines are critical to the nation’s commerce and economy and, as a consequence, they can be attractive targets for terrorists. Before September 11, 2001, safety concerns took precedence over physical and operational security concerns for a majority of pipeline operators. Security matters were mainly limited to prevention of minor theft and vandalism. The terrorist attacks of 9/11 forced a thorough reconsideration of security, especially with respect to critical infrastructure and key resources. Pipeline operators have responded by seeking effective ways to incorporate security practices and programs into overall business operations.
(U//FOUO) The Transportation Security Administration’s (TSA) mission includes enhancing the security preparedness of our nation’s hazardous liquid and natural gas pipeline systems. This 2008 threat assessment addresses terrorist attacks against oil and gas pipeline facilities overseas and considers the potential for attacks against the oil and gas pipeline industry in the United States. Pipelines are a mode of transportation with distinct characteristics and security requirements. Pipelines operate in all 50 states and transport more than two-thirds of all petroleum products, including gasoline, diesel and jet fuel, home heating oil, kerosene, and propane. Natural gas transmission and distribution pipelines transport natural gas from sources to residential, commercial, and industrial customers. Hazardous liquid pipelines transport crude oil to refineries and refined oil products to product terminals and airports. America depends daily on its pipelines to meet its oil and gas requirements.
Pipeline and Hazardous Materials Safety Administration (PHMSA) Gas Distribution Pipeline Safety Report
PHMSA made an adjustment to the expected value of property damage occurring from 2001 through 2005, since some of the property damage was caused by Hurricane Katrina in 2005 (an outlier), which skewed the damages above expectations and which this rule was not designed to mitigate. A more accurate expected value of benefits, perhaps reflective of a longer timeline and taking into account risks and consequences not experienced from 2001 through 2005, would show a higher expected benefit of this rule} It is possible for high-consequence accidents to occur, in which there are a disproportionately large number of casualties (Le., deaths and serious injuries), since a portion of gas distribution piping is located in densely populated areas with schools and businesses containing a large number of people.