In accordance with our agreement for Professional Services, we have completed the first phase of the vibration monitoring during fracturing of a natural gas well. The purpose of this letter is to report on the vibration monitoring activities undertaken by Freese and Nichols, Inc. on January 24 and January 25, 2011. Monitoring activities were conducted for the purpose of determining the potential damaging effects of vibrations generated during fracturing operations of natural gas wells. Within the City of Arlington there are several planned fracturing operations which are scheduled near some of the City’s elevated water storage tanks. These planned wells are as follows:
1. Truman Site near the Collins Tank (Chesapeake Energy)
2. Poly Webb Site near the Southwest Tank (Vantage Energy)
3. Eden Site near the Matlock Tank (XTO Energy)
The first phase of the project was to monitor vibrations generated during gas well fracturing at a site that posed little risk to susceptible critical infrastructure. This was intended to allow precautionary measures to be taken, if necessary before fracturing of any of the wells adjacent to the elevated storage tanks. The second phase of the project is to monitor vibrations during gas well fracturing of the Truman lH well near the Collins Tank and assess the potential impacts on the structure.