2014-12-29_REPORT - M1977215

• Permit No: M1977215
• IBM Index Class Name: Report
• Doc Date: 12/29/2014
• Doc Name: Interim Waste Rock Characterization Summary, 1.
• From: Rio Grande Silver, Inc.
• To: DRMS
• Email Name: RCO
• Media Type: D
• Archive: No

AIN pi
One Government Gulch-PO Box 929 Kellogg ID 83837-0929 [phone] Fax[phone]
McClelland Laboratories Inc Project Name:MLI:3819
1016 Greg Street Work Order: W4B0077
Sparks,NV 89431 Reported: 13-Mar-14 15:02
Client Sample ID: BDP-ABATC-112213 Sampled. 05-Feb-14 11:00
Received 07-Feb-I4
SVL Sample ID: W4B0077-01 (Solid) Sample Report Page 1 of 1 Sampled By.
Method Analyte Result Units RL MDL Dilution Batch Analyst Analyzed Notes I
Acid/Base Accounting&Sulfur Forms
Modified Sobek ABA 15.8 TCaCO3/kT 0.3 N/A 02/14/14 17:27
Modified Sobek AGP <0.3 TCaCO3/kT 0.3 N/A 02/14/14 17:27
Modified Sobek ANP 15.8 TCaCO3/kT 0.3 0.1 W407027 MCB 02/13/14 14.14 AS
Modified Sobek Non-extractable Sulfur <0.01 % 0.01 0.006 W407027 MCE 02/14/14 17:27
Modified Sobek Non-Sulfate Sulfur <0.01 % 0.01 0.006 W407027 MCE 02/14/14 17:27
Modified Sobek Pyritic Sulfur <0.01 % 0.01 N/A 02/14/14 17:27
Modified Sobek Sulfate Sulfur <0.01 % 0 01 N/A 02/14/14 17:27
Modified Sobek Total Sulfur <0.01 % 0 01 0.006 W407027 MCE 02/14/14 17:27
Acid/Base Accounting&Sulfur Forms(HCI Wash)
Modified Sobek ABA-HCI 15.8 TCaCO3/kT 0.3 N/A 02/14/14 17:27
Modified Sobek AGP-HCI <0.3 TCaCO3/kT 0.3 N/A 02/14/14 17:27
Modified Sobek Non-extractable Sulfur <0 01 % 0.01 0.006 W407027 MCE 02/14/14 17:27
Modified Sobek Non-Sulfate Sulfur-HCI <0.01 % 0 01 0.006 W407027 MCE 02/14/14 17:27
Modified Sobek Pyritic Sulfur-HCI <0.01 % 0.01 N/A 02/14/14 17:27
Modified Sobek Sulfate Sulfa-HCI <0.01 % 0.01 N/A 02/14/14 17:27
Modified Sobek Total Sulfur <0.01 % 0.01 0.006 W407027 MCE 02/14/14 17:27
Classical Chemistry Parameters
EPA 6002-78-054 Paste pH @20.8°C 10.05 pH Units W407020 MCB 02/12/14 14:01
EPA 6002-78-054 Paste pH @19.7°C 10.17 pH Units W411205 MCB 03/13/14 14:36
EPA 600/2-78-054 Paste pH @19.7°C 10.16 pH Units W411205 MCB 03/13/14 14:36
This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee
_ John Kern
Laboratory Director
SVL holds the following certifications:
AZ:0538,CA:2080,FL(NELAC):E87993,ID:ID00019&1D00965(Microbiology),NV:ID000192007A,WA:C573 Work order Report Page 2 of 4