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: W4E0626
Sparks,NV 89431 Reported. 03-Jun-14 16:32
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 W423016 03-Jun-14
Modified Sobek Non-extractable % <0.01 0.006 0.01 W423016 03-Jun-14
Sulfur
Modified Sobek Non-Sulfate Sulfur % <0.01 0.006 0.01 W423016 03-Jun-14
Modified Sobek Total Sulfur % <0.01 0.006 0.01 W423016 02-Jun-14
Acid/Base Accounting&Sulfur Forms(HCI Wash)
Modified Sobek Non-extractable % <0.01 0 006 0 01 W423016 03-Jun-14
Sulfur
Modified Sobek Non-Sulfate % <0.01 0.006 0.01 W423016 03-Jun-14
Sulfur-HC1
Modified Sobek Total Sulfur % <0.01 0.006 0 01 W423016 02-Jun-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 198 216 91.8 80-120 W423016 03-Jun-14
Modified Sobek Total Sulfur % 1 87 2.00 93.5 80-120 W423016 02-Jun-14
Acid/Base Accounting&Sulfur Forms(HCI Wash)
Modified Sobek Total Sulfur % 1.87 2.00 93.5 80-120 W423016 02-Jun-14
Classical Chemistry Parameters
EPA 600/2-78-054 Paste pH pH Units 7.37 7.40 99.6 93.7-106.3 W423017 02-Jun-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 14.2 13 7 3 5 20 W423016 03-Jun-14
Modified Sobek Non-extractable % <0.01 <0.01 UDL 20 W423016 03-Jun-14
Sulfur
Modified Sobek Non-Sulfate Sulfur % <0.01 <0.01 UDL 20 W423016 03-Jun-14
Modified Sobek Total Sulfur % 0 01 0.01 12.0 20 W423016 02-Jun-14
Acid/Base Accounting&Sulfur Forms(HCI Wash)
Modified Sobek Non-extractable % <0.01 <0 01 UDL 20 W423016 03-Jun-14
Sulfur
Modified Sobek Non-Sulfate % <0.01 <0.01 UDL 20 W423016 03-Jun-14
Sulfur-HCI
Modified Sobek Total Sulfur % 0.01 0.01 12 0 20 W423016 02-Jun-14
Classical Chemistry Parameters
EPA 600/2-78-054 Paste pH pH Units 10.96 11.06 0.9 20 W423017 02-Jun-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 3 of 4