Laserfiche WebLink
__ RIO GRANDE <br />SILVER, INC. <br />C OM <br />December 20, 2012 N 7.02. <br />G �- <br />pivision of cl <br />R <br />Bob Oswald Mining & gafety m <br />Division of Reclamation, Mining, and Safety <br />691 CR 233 <br />Suite A -2 <br />Durango, CO 81301 <br />RE: Rio Grande Silver Quarter 4 SPLP, ABA, and pH Results <br />Equity Exploration Project, NOI No. P- 2011 -010, Modification MD -2 <br />Dear Mr. Oswald, <br />As outlined in the Rio Grande Silver (RGS) letter dated October 11, 2012, we are providing a <br />Quarter 4 update of project scope and current activities as well as Synthetic precipitation <br />leaching procedure (SPLP) results, Acid -Base Accounting (ABA) results, and West Willow <br />Creek pH results from water sample sites WW- Recon -1B through 4. <br />Scope of Work <br />Currently, the scope of work for the Equity Exploration Project is being evaluated. To date, no <br />waste rock has been put on the surface and no field weathering barrel tests have been set up. <br />Once a thorough evaluation of the 2012 exploration data is complete, a determination regarding <br />future waste rock placement will be forwarded to the Colorado Division of Reclamation, Mining, <br />and Safety (DRMS). <br />Leachate Results from the Field Weathering Barrel Tests <br />To date, no waste rock has been brought to surface to utilize for field weathering barrel tests. <br />Synthetic Precipitation Leaching Procedure (SPLP) and Acid -Base Accounting (ABA) <br />Results <br />The initial SPLP and ABA results from the four underground samples were attached to the RGS <br />letter to DRMS dated September 24, 2012. Subsequently, these four underground samples were <br />analyzed for SPLP only (results attached as Figure 1). In September 2012, two additional <br />underground samples were collected for ABA testing only (results attached as Figure 2). Finally, <br />in September 2012, six samples were collected from the surface in the area immediately adjacent <br />to the portal (four samples from previous Homestake waste rock piles, and two samples of talus). <br />These results are attached as Figure 3. <br />Currently, our geochemical consultant is reviewing the SPLP and ABA results and a narrative <br />regarding the interpretation of the results will be provided in RGS's Ql 2013 update. <br />112 East 12` Street P O Box 610 Creede, CO 81130 <br />719 -658 -1080 Fax 719 -658 -1082 <br />DEC 2 t 2012 <br />DURANGO FIELD OFFICE <br />DIVISION OF RECLAMATION, <br />MINING AND SAFETY <br />W A' T 1Z a IT `1 Z 7 t Z Q 11+ i fZ <br />