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OuRaY SILVER MINES <br /> d. Table 3 suggests a seep was exposed during the excavation, please provide details <br /> on the discovery of the seep as well as what measures were taken to handle the <br /> water generated by the seep. <br /> No seeps were discovered during the excavation process.A seep inspection was added to Table 3 <br /> because a seep inspection is required by Rule 7.4.2(2)(c). <br /> 19. A site wide Environmental Protection Map was included in the TR-14 package however <br /> no EPF specific information was provided, as required by Rule 6.4.21(7)(d). Address this <br /> item with regards to the Reagent Room specifically. <br /> The Environmental Protection Map has been updated with regards to the Reagent Room. Surface(SW), <br /> underground(UG), and groundwater(GW)are monitored in and around the site at locations shown on <br /> the Environmental Protection Map. Water is sampled quarterly at these locations(except for surface <br /> water sites which are not sampled in Q1 due to safety concerns)to monitor water quality and to detect <br /> possible contamination. No monitoring beyond inspection and management of containment structures is <br /> proposed for the Reagent Room. <br /> 20. Describe the release response procedures, redundancies and back-up measures <br /> necessary, appropriate, and economically reasonable, to control, prevent and mitigate <br /> releases of the designated chemicals from the containment facility outside the permit <br /> area during mining and reclamation operations pursuant to Rule 6.4.21(7)(e). <br /> Please see the SPCC plan and Emergency Response Plan. <br /> a. Containment Facilities Evaluation- Rule 6.4.21(7)(f) <br /> Please see Table 5 that shows containment volumes of all areas inside of the Reagent Room. The mill is <br /> not in a floodploin and stormwater is diverted away from the mill area by a diversion ditch upslope. <br /> b. Section 4 states that all designated chemical piping is doubled walled, however <br /> drawings 700-MP-207 and 700-MP-208 do not specify the pipe will be double <br /> walled. Please provide more information regarding the double wall construction <br /> of the piping. <br /> The double walled pipes will be field fit and are not shown in the drawings.Areas where double walled <br /> pipes are used will be shown on as built drawings submitted to the Division once construction is <br /> complete. However, the double walled pipes are a redundancy as the pipes will never be in an area that <br /> is outside of secondary containment. Once reagents leave the Reagent Room, they pass through the <br /> compressor room which has secondary containment sufficient to control complete release of all reagents <br /> as indicated in drawing 700-FF-104, then into the existing Mill Building which also has existing secondary <br /> containment. <br /> 7 1 P a g e <br />