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  In an attempt to reduce air pollution, Act 124 was passed making it illegal to idle diesel-powered vehicles for more than 5-minutes. One of the reasons the natural gas industry is considered so dirty is due to all the diesel emissions they produce. Below is some additional information on Act 124 as well as how to report violations. 


Diesel Idling - Act 124

Source: Pa. DEP Bureau of Air Quality

Diesel engine exhaust contains harmful pollutants in a complex mixture of gases and particulates. We are all potentially exposed to pollution from diesel vehicles. Reducing pollution from heavy-duty trucks and buses is part of the nation's clear air plan. Idling produces about 140,000 tons of nitrogen oxides and 7.6 million tons of carbon dioxide annually.

Act 124

Act 124 states that “An owner or operator of a location where subject vehicles load or unload or a location that provides 15 or more parking spaces for subject vehicles shall erect and maintain a permanent sign.”  Hence, the act requires the location owner or operator to post, at minimum, one sign to alert drivers of subject vehicles of idling requirements. Owners should be forewarned that it is part of the property owner’s responsibility to stop idling on their property. Location owners risk fines if illegal idling is occurring on their property. Therefore, signs should be posted in sufficient quantity and positioned so that drivers are alerted to the restrictions placed on idling. There is no maximum number of signs location owners are permitted to post.


If a citizen believes that a diesel-powered motor vehicle is idling illegally, they may call their nearest DEP Regional Office or their local law enforcement agency.  The idling restrictions in Pennsylvania are fixed in statute.  Therefore, a local law enforcement officer is able to respond to a complaint about illegal idling.  DEP Regional Offices can be reached by calling the statewide Citizen’s Complaint Line toll free at 1-866-255-5158.  Local law enforcement non-emergency numbers can be found in the local phonebook.



Chemicals in Natural Gas Operations




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