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the 20 percent opacity limit specified in the Operator's air permit. An EPA-trained employee of <br />• the Operator would monitor opacity once every two weeks. <br />The Operator would control fugitive dust for the on-site roads by enforcing low speed limits (i.e., <br />25 mph for haul trucks on the county road) and applying magnesium chloride, calcium chloride, <br />or equivalent to the haul roads within the mine portal area as needed to reduce fugitive dust. The <br />frequency of chemical suppressant applications would depend on site-specific conditions such as <br />precipitation, road dust silt content, and traffic type and volume. <br />The Operator would restrict vehicular travel to established roads to the extent practical. <br />The Operator would minimize the area of disturbed land. <br />Cultural Resources <br />If access roads are proposed to be utilized for drilling operations cross through eligible cultural <br />properties, the BLM would require temporary protective fencing during drilling operations <br />(including reclamation) to protect them from surface disturbance or inadvertent damage. A BLM <br />or BLM-permitted archaeologist familiar with the boundaries of these sites would direct the <br />placement of the fencing which would be placed by hand. All fencing would be removed upon <br />the completion of the exploration and associated reclamation activity. <br />Access routes constructed or utilized to complete annual drilling activity would be reclaimed as <br />soon as possible following drilling (within 1-2 weeks is preferred). If agency monitoring reveals <br />impacts to adjacent sites from vandalism, illegal collection or looting before reclamation is <br />complete, additional reclamation measures may be necessary and these would be completed by <br />the Operator in cooperation with the BLM. <br />If cultural resources are discovered during plan-related operations, all activities in the vicinity of <br />the resource would cease immediately and the Operator would notify the BLM Authorized <br />Officer. The BLM or a BLM-permitted archaeologist would inspect and evaluate the discovery <br />as soon as possible if during drilling operations but at most within 5 days to determine its nature <br />and extent and eligibility to the National Register of Historic Places. If the resource is <br />determined "eligible", the BLM would determine appropriate avoidance and protection measures <br />after consulting with the Operator. If avoidance is not possible, data recovery would be <br />completed by the Operator according to Department of Interior policies and guidelines and the <br />BLM Protocol with the Colorado State Historic Preservation Office. <br />Human remains and associated artifacts may be discovered during project development or during <br />controlled archaeological test excavations. Discovery of such items would be handled in <br />accordance with the provisions of the Native American Graves Protection and Repatriation Act. <br />Pursuant to 43 CFR 10.4(g), the BLM authorized officer must be notified, by telephone, with <br />written confirmation, immediately upon the discovery of human remains, funerary items, sacred <br />objects, or objects of cultural patrimony. Further, pursuant to 43 CFR10.4 (c) and (d), activities <br />must stop in the vicinity of the discovery and the discovery must be protected by the BLM and <br />• the Operator for 30 days or until the Operator is notified by the authorized officer. All reasonable <br />4