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

McClelland Laboratory-1309086 Amended
Spike Sample MS MSD Spike MS% MSD%
QCBatchlD QCType Parameter Method Sample Result Result Result Value Units Rec. Rec. RPD
Nickel EPA 200.7 1309089-001 ND 5.13 5.15 5.00 mg/L 103 103 <1%
Phosphorus EPA 200.7 1309089-001 ND 5.97 5.82 5.00 mg/L 113 110 3%
Potassium EPA 200.7 1309089-001 3.06 14.0 14.1 10.0 mg/L 109 110 1%
Scandium EPA 200.7 1309089-001 ND 1.06 1.05 1.00 mg/L 106 105 1%
Silver EPA 200.7 1309089-001 ND 0.087 0.084 0.090 mg/L 96 92 4%
Sodium EPA 200.7 1309089-001 31.6 42.1 43.8 10.0 mg/L 105 122 4%
Strontium EPA 200.7 1309089-001 ND 1.10 1.10 1.00 mg/L 104 104 <1%
Tin EPA 200.7 1309089-001 ND 0.926 0.904 1.00 mg/L 93 91 2%
Titanium EPA 200.7 1309089-001 ND 0.934 0.934 1.00 mg/L 93 93 <1%
Vanadium EPA200.7 1309089-001 0.017 1.06 1.05 1.00 mg/L 104 103 1%
Zinc EPA 200.7 1309089-001 ND 1.10 1.08 1.00 mg/L 110 108 2%
QC13090540 MS 1 Mercury EPA 200.8 1309089-001 ND 0.001072 0.001079 0.001 mg/L 105 105 1%
Antimony EPA 200.8 1309089-001 ND 0.0106 0.0104 0.010 mg/L 97 95 2%
Arsenic EPA 200.8 1309089-001 ND 0.0554 0.0536 0.050 mg/L 106 103 3%
Lead EPA 200.8 1309089-001 ND 0.0092 0.0092 0.010 mg/L 92 92 <1%
Selenium EPA 200.8 1309089-001 ND 0.0462 0.0463 0.050 mg/L 92 93 <1%
Thallium EPA 200.8 1309089-001 ND 0.0088 0.0094 0.010 mg/L 88 94 7%
Uranium EPA 200.8 1309089-001 ND 0.0100 0.0099 0.010 mg/L 94 94 1%
DF=Diiution Factor,RL=Reporting Limit,ND=Not Detected or<RI Page 9 of 9
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