Report Of Cabot Oil & Gas Corporation's Utilization Of Effective Techniques For Protecting Fresh Water Zones/Horizons During Natural Gas Drilling - Completion And Plugging Activities

A study was conducted of several natural gas wells in Susquehanna County, Pennsylvania that were installed and operated by Cabot Oil & Gas Corporation (Cabot). The investigation included a comprehensive analysis of the structural and mechanical integrity of the natural gas wells with a focus on whether appropriate techniques were utilized to protect fresh water zones. The study concludes that Cabot used and is using procedures for drilling, casing and cementing wells that (i) meet or exceed the requirements of the Pennsylvania Oil & Gas Act, (ii) are adequate to protect Pennsylvania's drinking water, (iii) are not causing or allowing methane migration into Pennsylvania's drinking water.

In June 2010, we conducted an investigation of 14 natural gas wells drilled by Cabot Oil and Gas Corporation's ("Cabot") in Susquehanna County, Pennsylvania in order to assess whether fresh water zones are adequately protected during well drilling and operation. This study was undertaken in an effort to address concerns raised by the Pennsylvania Department of Environmental Protection ("PA DEP") regarding the integrity of Cabot's wells. The study included an evaluation of the history and current status of the wells, focusing on (i) tubular goods; (ii) cementing practices; and (iii) the processes Cabot employed during the construction and/or remedial work on the wells.