2015-02-27_REPORT - M1982020 (3)

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EPF 2 - Diesel Storage Diesel is stored in a 10,000 gallon manufactured skid - mounted single wall steel tank above ground storage tank. This tank is set into a concrete secondary containment area, and is inside a locked steel building. The secondary containment has a total capacity of 13,800 gallons and is therefore able to hold up to 138% of the tank capacity. In the unlikely event of spillage from both the primary and secondary containment, spill kits are immediately available within the building and heavy equipment is normally on site to contain any larger spills. EPF 3 - Used oil storaee. A 100 gallon plastic container for used oil storage is contained within a secondary containment standard metal tank with 150 gallon storage capacity. Spill kits are immediately available to cater for any spillage event occurring here. In the event of catastrophic spill all material would drain onto the adjacent soils were they could be cleaned up, or if the release were large and fast enough, into the primary sediment settling pond. In all cases materials would be neutralized according to manufacturer specifications and procedures. 8 GROUNDWATER INFORMATION The mine site is located on top of a high ridge at the divide between Stubbs Gulch on the south and Chance Gulch on the north. Stubbs Gulch flows in a northwest direction and Chance Gulch flows northwesterly from the immediate area of the mine, shifting to a more northward direction approximately two and a half miles to the north of the permit area. A little over one mile to the east of the mine area lays the headwaters of Dirigo Gulch, a drainage that flows to the east and then turns northward, semi - paralleling Chance Gulch (Exhibit Q. All of the above - noted drainages are intermittent with flows occurring only during the larger precipitation events and spring snow melts. The majority of the major stream cutting exhibited in them is likely to have taken place at the end of the last ice age and the physiography of the area has changed little since. The closest stream that could be deemed perennial would be Stubbs Gulch, in its lower reaches, a distance of no less than seven miles from the mine site. The general mine site is located within a geologic unit that has been identified as being made up of Precambrian schists, phyllites, and quartzites which have been metamorphosed to greenschist to lower amphibolite facies. The original bedding is still preserved and the beds are generally turned up on end to be nearly vertical or even slightly overturned. The unit has been