| http://www.w3.org/ns/prov#value | - ations of the riskiest gas pipeline in the state. pipe segments get on the list based on four criteria. first, will there or has there been third party construction nearby? is there any pipe corrosion? has there been any land movement near the pipes, such as an earthquake? and finally, the pipe's age, design and what it is made of. the pg&e president christopher johns says these factors constantly
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