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_4� <br /> DL'R4Y 9a ER M hEs <br /> Response: The Copper Sulfate tank is made of stainless steel. This tank is a pre-existing <br /> tank that was used for Copper Sulfate in the mill when it was originally being <br /> commissioned in 2015. The tank is 304 stainless steel. <br /> 33. Drawings 700-GA-001 and 700-MP-205 both reference a septic tank adjacent to <br /> the compressor room. What waste is discharging into this tank? Is there a leach <br /> field associated with it? If so, please identify the location and type of the leach <br /> field. Provide assurances that no waste that has come in contact with milling <br /> chemicals will discharge into the tank. <br /> Response:Sewage from the bathrooms in the mill is discharged into the septic tank. There <br /> is a multi-fingered leach field that is associated with the septic that is located to the north <br /> of the tank. Secondary containment protects the septic system from the milling process. <br /> There are no plumbing connections between the milling process and the septic system. <br /> 34. Are all concrete containment structures to be completed as a monolithic pour? If <br /> not, indicate what sealant will be used between pours to ensure adequate binding <br /> between concrete layers. <br /> Response:All concrete containment structures will be completed as a monolithic pour. <br /> Regards, <br /> To <br /> Jesse <br /> Environmental Specialist <br /> Ouray Silver Mines <br /> 211Paoe <br />