Laserfiche WebLink
1 • <br />1 <br />1 <br />1 <br />August 19, 1999 <br />9.0 RISK MITIGATION <br />Based upon this risk assessment the potential environment impacts of the project have been <br />evaluated. A number of potential failure mechanisms have been reviewed and identified as <br />negligible risk. Consequently, the proposed project designs, monitoring programs, and <br />operational controls are generally adequate. There are a number of failure mechanisms for <br />which risk greater than negligible was identified including: <br />• Coalescing of cavities <br />• Rupture of the pipeline <br />• Pipeline leaks due to mechanical failure <br />• Transportation accidents <br />With the exception of coalescing of cavities, all of these mechanisms are related to <br />operational practices, monitoring, and maintenance. It is recommended that a detailed <br />operation plan with employee training programs be designed and implemented to minimize <br />the potential for environmental impact. It is also recommended that the employee incentive <br />program be tied to environmental compliance. Thus making it the responsibility of all <br />employees to minimize spills, accidents, and upset conditions. These plans and training <br />programs would include: <br />• Spill prevention and emergency response plans <br />• Health and safety training and regular meetings <br />• Well defined action levels for agency reporting <br />• Wildlife awareness training <br />• Chemical handling and management practices <br />MEMORANDUM <br />-12- 993 -2057 <br />Mitigation to minimize risk for the coalescing of cavities could be based on careful cavity <br />volume monitoring, together with down -hole geophysical monitoring of cavity <br />development. The latter could be carried out using, for example, borehole seismic <br />tomography using sensors in existing monitoring wells and specially drilled wells in the <br />pillars between the cavities. It is recommended that an appropriate system be installed. <br />10.0 REFERENCES <br />Van Zyl, D. and Bamberg, S., 1992. Qualitative Environmental Risk Assessment for Mine <br />Development. In: Risk Assessment / Management Issues in the Environmental <br />Planning of Mines. Eds. Van Zyl, Koval, and Li. Society for Mining, Metallurgy, <br />and Exploration, Inc. <br />\ \ GAI_DENI \PROJECTS \WP \991205712057 M1.DOC Golder Associates <br />