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Seismicity is regulated at PNR by the Oil and Gas Authority using a ‘traffic light system’. You can read more about this here. The work will be completed by the end of November and followed by flow testing of the well, with gas flow results expected early in 2020. We are regulated by the Oil and Gas Authority, Environment Agency and Health and Safety Executive, with others such as the British Geological Survey monitoring us too. Cornelius resigned from Cuadrilla in 2014, after Lord Browne, former chief of the oil company BP, took over the chairmanship. Browne left in 2015. The company declined the opportunity to comment on Cornelius’s views. In 2017, we launched an ePortal, which provides data on our Preston New Road operations. Cuadrilla’s ePortal can be viewed here. Data relating to noise, air quality, water and traffic information can be found in the monthly reports section. HAS CUADRILLA ASSESSED ITS IMPACT ON THE ENVIRONMENT?

You may also find our ePortal of interest which details key data in relation to traffic movements. QUESTIONS FROM THE COMMUNITY What are the benefits of Shale Gas?Operations stop for a period of 18 hours if a tremor of local magnitude (ML) 0.5 or greater is detected. This level is well below what could potentially cause any damage at the surface and this pause allows any further seismicity to be limited. Local people should be reassured that any resulting ground motion will be far below anything that could cause harm or damage and is likely to be much less than caused daily by other industries such as quarrying or construction or even heavy goods vehicles travelling on our roads. The University of Liverpool released a report in 2018 to help put the low-level threshold of the Traffic Light System into context. The researchers indicated that vibrations experienced during everyday life are equivalent, or exceed, those that may occur from induced seismicity during hydraulic fracturing operations. You can view the paper here. Questions about PEDLS What is a PEDL? Please see our Frequently Asked Questions ( FAQs) for a wide variety of further information on how seismicity is created and regulated, as well as many other topics including the process of fracturing and environmental regulation and responsibility. You can also watch a short video we produced with the assistance of Liverpool University, this video shows what micro-seismicity looks like.

Restoration – When all of the oil or natural gas that can be recovered economically from a reservoir has been produced, the land is returned to the way it was before the drilling operations started. Wells will be filled with cement and pipes cut off 3-6 feet below ground level. All surface equipment will be removed and all pads filled in with earth or replanted. The land can then be used again by the landowner for other activities, and there will be virtually no sign that a well was once there. Furthermore, other extractive industries – notably quarrying and deep geothermal – are not subject to the same restrictions as shale gas when it comes to induced seismicity and ground vibration. Given that we halt hydraulic fracturing activities at 0.5 ML, we are confident that our operations will not result in a level of seismicity that would be of a significant enough magnitude to cause damage. Why do Cuadrilla want the traffic light system reviewed?

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Very small movements will be detected due to the highly sophisticated monitoring system in place at PNR. The British Geological Survey (BGS), which monitors seismicity at PNR, has published comprehensive information here. In particular the BGS says: Egan welcomed the announcement this month that the moratorium would be lifted, but the company has not yet said whether it will unseal any wells. Peak Particle Velocity (PPV) provides an equivalent ground motion calculation about the impact felt at surface. The Health and Safety Executive (HSE) regulates the safety of the operations. It is responsible for ensuring that risks to workers and the public are reduced as far as possible. HSE regulations require an independent and competent person to examine the well’s design and construction to ensure that measures are in place to control major hazards to people from well-related activities and accidents. Once permissions have been obtained from the relevant regulators, all relevant consultees have been notified and permits are in pace, the OGA is responsible for issuing a consent to drill.