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• (Page 3) • MINE ID # OR PROSPECTING ID #: M-~~-~5~ INSPECTION DATE: ns-m-nn INSPECTORS INITIALS: ~_ 5. Comment: ". , . Mr. Stockwell is concerned about the storage of the explosives, chemicals and fuels on his property. Robinson may use explosives for this mine. These items will create a hazard For Mr. Stockwell's cattle, as well as a hazard to any wildlife on Mr. Stockwell's property. The storage of chemicals and fuel on Mr. Stockwell's property also raises potential CERCLA issues. Has Robinson addressed those issues? Mr. Stockwell does not want any disposal of waste or storage of petroleum products or hazardous substances on his property." The storage of explosives on the property and the safety issues involved are more properly addressed by the Mine Safety and Health Administration. However, once this issue is addressed, Robco would be required to modify their permit to allow storage of explosives on site so that the DMG could include the cost to reclaim the storage area into the reclamation bond. When (and if) Robco decides to use explosives on site they will be required to specify the blasting plan for the site so DMG can review it to ensure that buildings and other manmade structures are adequately protected. No chemicals are stored on site. Fuels used on site are, at this time, brought in on fuel trucks or trailers that are not considered to be a hazard since they are on site for such a short period. The permit requires that, if fuel is permanently stored on site, a containment area large enough to hold the entire volume of fuel will be constructed. If fuel is inadvertently spilled within the permit area, the DMG requires operators to clean up the spill to standards that are as stringent as standards used by the Colorado Department of Public Health and Environment's Hazardous Waste Section. The permit also requires that "All refuse or acid forming toxic materials that have been used will be disposed of off site at an appropriate location or public landfill."(see page 16, Exhibit E). 6. Comment: "The new mining proposed on the NE'/a of Section 16 will create a larger eyesore to this area because the new mine will be higher on the Hogback and even a more visible scar on the land." The Colorado Land Reclamation Act for the Extraction of Construction Materials provides no authority to regulate visual impacts of mining and this aspect is therefore not under the jurisdiction of the DMG. This concern may be more appropriately addressed via the Jefferson County Special Use Permit. Comment: "... Mr. Stockwell is concerned that Robinson may not have complied with all of the necessary permit requirements for Jefferson County," The DMG cannot enforce or address items contained in another agency's permit, The landowner is advised to contact Jefferson County concerning compliance with County permit requirementr. 8. Comment: Mr. Stockwell is concerned with potential mine drainage problems on his property. Specifically, Robinson has a mining permit for the unrelated Hogback Mine which is located south of Mr. Stockwell's property. From the Hogback Mine there has been acidic mine drainage into the High Line Canal. The Hogback Mine is mined and the Stockwell property will be mined from the same rock formation which has the potential for forming acidic mine drainage. Mr. Stockwell is concerned that no drainage permit exists since the potential exists for acidic mine drainage if the mine discharges water." During this inspection a pond was observed at the base of the highwall in the active mine area. This pond has apparently been in place for quite some time since cattails were observed growing along the east edge of the pond. The pond was sampled for pH with a pH meter supplied by the operator..The pH measured was approximately 8.6 and mud puppies (salamanders) and fish (probably bluegills) were