2012-11-01_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 11/1/2012
• Doc Name: Weekly CQA Rpt.-AMEC Mill Site Construction.
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

Location
This Week
(tons)
Cumulative
(tons)
Comments
E.Cresson Clay Process
0
81,150
SLF processing is temporarily paused
Total
0
81,510
SLF processing is temporarily paused
Location
This Week
(tons)
Cumulative
(tons)
Comments
DCF Process
0
228,613
DCF processing is temporarily paused
Total
0
228,613
DCF processing is temporarily paused
C) Slope Contouring
No work performed during the week.
ame0
D) Soil Liner Fill (SLF)
Soil liner fill (SLF) placement was performed in the areas shown on Figure 3. Subgrade was
approved and moisture conditioned prior to placement using a tandem -axle water truck.
Placement was performed using various CAT dozers.SLF material was hauled to the Mill Platform
from the temporary SLF stockpile previously located from the East Cresson stockpile using CAT
40 -ton articulating haul trucks loaded by a CAT 980 front -end loader. Moisture conditioning of SLF
material was performed in place using a tandem -axle water truck and compaction was achieved
using a 10 -ton vibratory smooth drum compactor. Nuclear density testing, moisture verification,
and depth check testing was performed with results within project specifications. Test locations
were surveyed by Ames.
Subgrade temperatures were monitored by an AMEC field representative prior to SLF placement.
Fill material was not placed until the entire fill area was at or above 32 °F. SLF placed during
ambient temperatures below 32 °F averaged 51 °F.
E) Drain Cover Fill (DCF)
Drain cover fill (DCF) placement performed in the area shown on Figure 6. The DCF was hauled
from the processing area to the placement area using 40 -ton articulating haul trucks loaded by a
CAT 988 front -end loader. The DCF was placed in a 2 -foot lift using various CAT dozers except
where haul routes were established. Haul routes consisted of four -foot lifts to be spread into 2-
foot lifts later. Laborers were present at all times during placement removing debris /sandbags and
assisting the dozer operator with lift thickness. All DCF was placed on previously approved
primary geomembrane. Fill material placed during ambient temperatures below 32 °F averaged
49 °F. AMEC field representatives monitored the DCF placement constantly.
F) Miscellaneous
The riser pipe was installed at the south west corner of the Mill Platform. A perforated 48" HDPE
SDR 17 was placed using a CAT 330 excavator. Prior to placement, approved geosynthetic clay
liner (GCL) was placed above the accepted primary geomembrane. Approved 3 -inch closed cell
foam and conveyor belting were then placed above the GCL. AMEC representatives observed the
installation. The riser was found to be constructed in accordance with the design drawings and
project specifications.
MEW Weekly Report WE 10.20.2012