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Viaţa langă sonde - Pennsylvania, Bradford County

Impactul asupra bunastarii » Viaţa langă sonde - Pennsylvania, Bradford County

Familiile din aproprierea sondelor detinute de Chesapeak Energy se confrunta cu contaminarea surselor de apa.  Compania este amendata.

Fenomenul implicat este migraţia metanului.  Mai multe explicaţii despre acest fenomen gasiti în secţiunea Studii de impact

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Earlier this month, Mike and Nancy Leighton received a certified letter from Pennsylvania’s Department of Environmental Protection.

The Leightons are the Leroy Township, Bradford County couple who have been dealing with methane gas leaking into their water well, basement and property since mid-May.

The letter told them what they already knew: “the Department’s investigation indicates that gas well drilling has impacted your supply.”

The Leightons live about a half-mile from Chesapeake Energy’s Morse well pad, which state regulators suspect began leaking methane May 19, when pressure forced natural gas through perforations in the well’s pipes during a repair job aimed at replacing a faulty piece of equipment. Since then, mysterious flammable puddles of gas have been bubbling up throughout the Leightons’ property, and methane has been seeping into their water well.

The gas has traveled from the Chesapeake well to the surface through a process called methane migration. It happens naturally, but drilling operations – especially wells with faulty cement or steel piping – can speed up the process, and provide an elevator of sorts for methane gas to rise to the surface and into people’s water wells.

In the Leightons’ case, state inspectors found 82.7 mg/L of methane in their water well. “…The level of concern begins above 28 mh/L methane, which is referred to as the saturation level,” the Department of Environmental Protection letter stated. It continued:

 

At this level, under normal atmospheric pressure, the water cannot hold additional methane in solution. This may allow the gas to come out of the water and concentrate in the air space of your home or building. There is a physical danger of fire or explosion due to the migration of natural gas into water wells or through soils into dwellings where it could be ignited by sources that are present in most homes/buildings.

…It is the department’s recommendation that all water wells should be equipped with a working vent. This will help alleviate the possibility of concentrating these gasses in areas where ignition would post a threat to life or property. Please note that it is not possible to completely eliminate the hazards of having natural gas in your water supply by simply venting your well.

pentru articolul complet dati click pe link+ul urmator

http://stateimpact.npr.org/pennsylvania/2012/08/28/more-than-three-months-later-methane-gas-is-still-leaking-in-bradford-county/

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