2010-03-18_REVISION - M1997032

• Permit No: M1997032
• IBM Index Class Name: REVISION
• Doc Date: 3/18/2010
• Doc Name: Response to Technical Adequacy comments
• From: Denison Mines
• To: DRMS
• Type & Sequence: AM1
• Email Name: RCO
• Media Type: D
• Archive: No

Denison Mines (USA) Corp.
Van 4 Mine - Ore Storage Pad

0
Table 1
Standard Specification for Non-Reinforced Polyvinyl Chloride (PVC) Geomembranes used in Buried
A lications ASTM D 7176
Certified ASTM PVC 10 PVC 20 PVC 30 PVC 40 PVC 50 PVC 60
Properties
Thickness D 5199 10 f 0.5 20 f 1 mil 30 f 1.5 mil 40 f 2 mil 50 f 2.5 mil 60 f 3 mil
mil
Tensile D 882 Min
Properties
Strength at 241bs/in 48 lbs/in 73 lbs/in 97 lbs/in 116 lbs/in 137 lbs/in
Break
Elongation 250% 360% 380% 430% 430% 450%
Modulus at 101bs/in 21 lbs/in 321bs/in 40 lbs/in 501bs/in 60 lbs/in
100%
Tear D 1004 Min 2.5.1bs 6 lbs 8 lbs 10 lbs 13 lbs 15 lbs
Strength
Dimensional D 1204 4% 4% 3% 3% 3% 3%
Stability Max Ch
Low D 1790 -10°F -15T -20°F -20°F -20°F -20°F
Temperature Pass
Impact
Index ASTM PVC 10 PVC 20 PVC 30 PVC 40 PVC 50 PVC 60
Properties
Specific D 792 1.2 g/cc 1.2 g/cc 1.2 g/cc 1.2 g/cc 1.2 g/cc 1.2 g/cc
Gravity Typical
Water D 1239 0.15% 0.15% 0.15% 0.20% 0.20% 0.20%
Extraction Max Loss
Percent
Loss max
Volatile D 1203 1.5% 0.9% 0.7% 0.5% 0.5% 0.5%
Loss Max Loss
Soil Burial G 160 Max
Ch
Break 5% 5% 5% 5% 5% 5%
Strength
Elongation 20% 20% 20% 20% 20% 20%
Modulus at 20% 20% 20% 20% 20% 20%
100%
Hydrostatic D 751 Min 42 psi 68 psi 100 psi 120 psi 150 psi 180 psi
Resistance
Seam ASTM PVC 10 PVC 20 PVC 30 PVC 40 PVC 50 PVC 60
Stren the
Shear D 882 Min 20 lbs/in 38.4 lbs/in 58.4 lbs/in 77.6 lbs/in 961bs/in 116 lbs/in
Strength
Peel D-882 Min 10 lbs/in 12.5 lbs/in 15 lbs/in 15 lbs/in 15 lbs/in 15 lbs/in
Strength
Notes:
1. Certified properties are tested by lot as specified in ASTM D 7176.
2. Modifications or further details of test are described in ASTM D 7176.
3. Index properties are tested once per formulation as specified in ASTM D 7176.
JOB NO. 64986. 10.1 8