2012-06-20_PERMIT FILE - C2010089A (19)

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within 500 feet of facilities such as gasoline or water and sewage lines and abandoned underground mines. As per Rule 4.08.1(4)(a), see Attachment 2.05.3(6)(a) -5 for blaster - certified shot patterns used within the minimum distances listed in this paragraph. At least 30 days before initiation of blasting, WFC will provide written notification to all residents or owners of dwellings or other structures located within one -half mile of the permit area which explains how to request a pre - blasting survey. WFC shall offer a pre -blast survey to any resident or owner of a dwelling or structure that is located within one -half mile of any part of the permit area scheduled for surface mining activities. For any owner responding to the pre -blast survey offer, WFC will promptly conduct a pre - blasting survey of the dwelling or structure and promptly submit a report of the survey to DRMS and to the person(s) requesting the survey. If a structure is renovated or added to, subsequent to a pre - blasting survey, then upon request to the Division a survey of such additions and renovations shall be performed in accordance with 4.08.2. The survey will determine the condition of the dwelling or structure and document any pre - blasting damage and other physical factors that could reasonably be affected by the blasting. Assessments of structures such as pipes, cables, transmission lines, and wells and other water systems shall be limited to surface conditions and readily available data. Special attention shall be given to the pre - blasting conditions of well and other water systems used for human, animal, or agricultural purposes and to the quantity and quality of the water. There may be some dwellings or structures within the mine permit boundary that will be destroyed by mining activities. For these dwellings or structures, a pre - blasting survey may not be conducted and written permission to destroy or move these dwellings or structures will be obtained by WFC. The written agreement to destroy /move structures or dwellings may be found on file or most likely in the surface /mineral agreement made between the land owner and WFC. Due to the proximity of dwellings and facilities to the blasting operations at NHN Mine, portable seismic recording instruments will be utilized to monitor blasts when 1) requested by a resident or owner of a residence or structure, or 2) at the discretion of WFC to determine the potential for blast damage or regulatory non - compliance. The current seismographs are Instantel DS077 "MiniMates ". The specifications for this type of instrument can be seen in Attachment 2.05.3(6)(a) -3. The instruments will measure peak particle velocity in three mutually perpendicular directions. They will be typically placed at the closest non - company owned structures to the actual blast site or at some point in between a blast and a non - company owned structure. They will provide a recorded readout of peak particle velocity, and for residences, the Section 2.05.3(6) (a) Page 3