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DRMS Comment Text(from DRMS letter AR Round 2) OSMI Responses <br /> Comment# <br /> The GB Stormwater Diversion Ditch#1 intercepts run-on water at Governors Basin and routes it around the site.The area at the borehole in Governor Basin that required a drainage channel is<0.2 acres.The plan is to divert <br /> While a stormwater channel will convey stormwater from the disturbed areas off location.Will either of these water in a channel,which will tie into additional stormwater features that will be constructed as part of the <br /> ditches/channels employ the use of collection/settling ponds prior to discharging off site. Otherwise how will Governor Basin reclamation project being implemented by Trout Unlimited and Uncompahgre Watershed <br /> 65 erosion and sedimentation be mitigated? Partnership with oversight by EPA.Stormwater from the permit area will be directed towards a settling <br /> pond/constructed wetlands along with other stormwater from the general area.There are no reagents stored or <br /> used at the borehole and the material that makes up the site is San Juan Tuff,which is acid neutralizing. <br /> Therefore,these stormwater control features do not meet the definition of an EPF. <br /> Page 5 of Appendix 2 states"All disturbed areas have collection systems in place that will direct runoff to the Page 5 of the SWMP has been updated to reflect actual stormwater management practices at the site including <br /> passive water treatment system..."This statement is inaccurate because disturbed areas of Governors Basin and Atlas TSF and Governor Basin. The SWMP Map also has been updated. See updated SWMP in updated Appendix <br /> 66 the Atlas TSF receiving stormwater do not report to the passive water system. Please revise this statement to 2 located in Attachment 2. <br /> clarify that only the main Revenue site reports to the passive water treatment system.As well as expand the <br /> statement to describe where water from the disturbed areas of the Governors Basin and Atlas TSF report to. <br /> The use of erosion logs,wattles,silt fencing,etc.are mentioned on pages 11-12(of Appendix 2:SWMP).However, These items are used to control sediment in various locations on the mine site and may vary depending on status <br /> where and how they will be utilized is not specifically mentioned.Please fully describe the applications(when and of vegetation and how prone the area is to erosion.In general,wattles are used where an area has been disturbed <br /> 67 where)these BMP features will be utilized. to prevent sediment from entering waterways.Silt fences are used in the same way.Once a disturbed area is <br /> stabilized,the wattles and/or silt fences are typically removed when no longer needed or are allowed to <br /> decompose in place.A description of these items are included in the SWMP as well as on the quarterly inspection <br /> checklists. <br /> The cross sections for the Atlas TSF included in the 2015 TWMP are for the proposed location and do not reflect Comment noted.The as-built drawings developed for the Atlas TSF have been included as an addendum to <br /> 68 the actual location that the TSF was built.Please include the Cross Section Map,C-3 in this section as the accurate Updated Appendix 6 to show the actual location and configuration of the Atlas TSF. <br /> cross sectional map given the TSF's constructed location. <br /> An SDS sheet for Sodium Metabisulfite by manufactured Quadra Chemicals LTD has not been provided under the The Sodium Metabisulfite SDS is provided in updated Appendix 8(Attachment 2)along with the other 12 SDSs of <br /> 69 AM-2 materials pursuant to Rule 6.4.21(5)(c).Please provide a comprehensive packet with all 13 SDS sheets as approved designated chemicals.This Updated Exhibit 8 is a comprehensive package of mill reagent SDSs for the <br /> Appendix 8 for the permit file. site. <br /> Amendment 02 AR Responses Round 2 <br /> M-2012-032 <br /> Sofa <br />