02e39f42_stem_Risks_of_Alternative_Fuel__Background
[Hazard --Event] Fire -- fromgas supplypipeline leaks [Consequences] The high line pressure meansthat large amounts of fuel canbe released quickly. [Knowledge] There is a substantial body ofknowledge about corrosion andleak hazards of natural gaspipelines and such accidents aregenerally infrequent. However,heavy use of road salt maysubject pipelines under bustraffic areas to a corrosiveenvironment not normally seenin rural settings. [Background] 
Because of the economics of CNGcompression, there is an incentive to usepipeline supply pressures to the compressorthat are much higher than those normally usedfor local natural gas distribution. Therefore,some transit operations with CNG fleets havenatural gas supplies of 200-400 psig or moreon the property, whereas normal natural gaslocal distribution pressures seldom exceed 10-80 psig.
Clean Air Program -- Assesment of the Safety, Health, Environmental and System Risks of Alternative Fuel
Background