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

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: W4G0294
Sparks,NV 89431 Reported: 25-Jul-14 12:01
Quality Control-BLANK Data
Method Analyte Units Result MDL MRL Batch ID Analyzed Notes
Acid/Base Accounting&Sulfur Forms
Modified Sobek ANP TCaCO3/kT <0.3 0.1 0.3 W430113 23-Jul-14
Modified Sobek Non-extractable % <0.01 0 006 0.01 W430113 24-Ju1-14
Sulfur
Modified Sobek Non-Sulfate Sulfur % <0.01 0.006 0.01 W430113 24-Jul-14
Modified Sobek Total Sulfur % <0.01 0.006 0.01 W430113 22-Jul-14
Acid/Base Accounting&Sulfur Forms(HCI Wash)
Modified Sobek Non-extractable % <0.01 0.006 0.01 W430113 24-Jul-14
Sulfur
Modified Sobek Non-Sulfate % <0.01 0.006 0.01 W430113 24-1u1-14
Sulfur-HCI
Modified Sobek Total Sulfur % <0.01 0.006 0.01 W430113 22-Jul-14
Quality Control-LABORATORY CONTROL SAMPLE Data
LCS LCS % Acceptance
Method Analyte Units Result True Rec. Limits Batch ID Analyzed Notes
Acid/Base Accounting&Sulfur Forms
Modified Sobek ANP TCaCO3/kT 205 216 95 1 80-120 W430113 23-Jul-14
Modified Sobek Total Sulfur % 2.16 2.00 108 80-120 W430113 22-Jul-14
Acid/Base Accounting&Sulfur Forms(HCI Wash)
Modified Sobek Total Sulfur % 2.16 2 00 108 80-120 W430113 22-Jul-14
Classical Chemistry Parameters
EPA 600/2-78-054 Paste pH pH Units 7.22 7.40 97.6 93.7-106.3 W430061 22-Jul-14
Quality Control-DUPLICATE Data
Duplicate Sample RPD
Method Analyte Units Result Result RPD Limit Batch ID Analyzed Notes
Acid/Base Accounting&Sulfur Forms
Modified Sobek ANP TCaCO3/kT 5.3 5.8 9.5 20 W430113 23-Jul-14
Modified Sobek Non-extractable % <0 01 <0.01 UDL 20 W430113 24-Jul-14
Sulfur
Modified Sobek Non-Sulfate Sulfur % <0.01 <0 01 UDL 20 W430113 24-Jul-14
Modified Sobek Total Sulfite % 0.02 0.02 13.0 20 W430113 22-Jul-14
Acid/Base Accounting&Sulfur Forms(HCI Wash)
Modified Sobek Non-extractable % <0.01 <0.01 UDL 20 W430113 24-Jul-14
Sulfur
Modified Sobek Non-Sulfate % <0 01 <0.01 UDL 20 W430113 24-Jul-14
Sulfur-HC1
Modified Sobek Total Sulfur % 0.02 0.02 13.0 20 W430113 22-Jul-14
Classical Chemistry Parameters
EPA 600/2-78-054 Paste pH pH Units 7.93 7.86 0.9 20 W430061 22-Jul-14
SVL holds the following certifications:
AZ:0538,CA:2080,FL(NELAC):E87993,ID.ID00019&ID00965(Microbiology),NV:ID000192007A,WA:C573 Work order Report Page 8 of 9