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<br /> <br />London Mountain Clean Up <br />July 2025 <br /> <br /> <br />T-4 <br />Map F-1 illustrates the final reclamation configuration and grade designed to restore each cleaned up <br />pile to stable, environmentally beneficial conditions upon completion of cleanup activities. These <br />configurations demonstrate long-term stability and integration with surrounding landscape features. <br />Maps C-2, C-2A, and F-1 collectively demonstrate a systematic, pile-specific approach from material <br />removal through progressive site restoration, with environmental protection measures maintained <br />throughout all operational phases. <br />1.5. 6.4.21 (3) Other Environmental Protection Requirements <br />No additional permits for other agencies are required beyond those specified in the referenced Exhibit <br />M, though Colorado Department of Public Health and Environment stormwater discharge permits will <br />be obtained as required for individual piles or pile groups. <br />All transportation contractors involved in material handling will implement Best Management Practices <br />developed specifically for the safe transport of potentially contaminated materials. These contractors <br />maintain familiarity with applicable emergency response procedures including protocols established in <br />the US Department of Transportation Emergency Response Guidebook to ensure appropriate response <br />in the unlikely event of material transport incidents. The comprehensive safety approach extends <br />beyond basic regulatory compliance to incorporate industry best practices for materials handling and <br />transportation. <br />Pile quantification and qualification procedures will be implemented prior to excavation of each <br />individual pile to ensure appropriate handling and processing of all materials encountered. Refer to <br />Section 1.5.1 of Exhibit D for more information on the pile quantification and qualification procedures. <br />Any material that tests positive for acid-forming potential and has been excavated during project <br />operations will be transported to the designated sorter facility (London Mine 110D area). This <br />commitment applies exclusively to materials that have been excavated, moved, or otherwise disturbed <br />as part of active site work. Testing of surface samples or undisturbed materials does not obligate <br />removal or transport of the entire source pile or area unless that material is subsequently disturbed <br />through project activities. <br />A comprehensive material quantity and quality report will be prepared for each pile and maintained for <br />regulatory review and operational records. <br />1.6. 6.4.21 (4) Other Permits and Licenses <br />No chemicals will be used within the permit area, eliminating the need for chemical storage, handling, <br />or disposal permits. <br />1.7. 6.4.21 (5) Designated Chemical(s) Evaluation <br />No chemicals will be used within the permit area, eliminating any requirements for designated chemical <br />evaluation or monitoring. <br />1.8. 6.4.21 (6) Designated Chemical(s) and Material(s) Handling