2003-02-19_REVISION - M1980244

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 2/19/2003
• Doc Name: Summary No. 10
• From: Golder Associates
• To: DMG
• Type & Sequence: AM8
• Media Type: D
• Archive: No

Phase IVb Weekly Summary No. 22 Page 2 003-2203
Ames exposed approximately 100 lineaz feet of geomembrane liner at the Phase Nb /Phase III tie-in
by removing previously placed Drain Cover Fitl (DCF).
Ames completed placement of HVSCS secondary and tertiary piping within the Phase Nb PSSA and
continued placement in the OSA, followed by DCF placement per project plans. Ames completed haul
and placement of DCF onto the Phase Nb PSSA upper geomembrane in the central portion of the
PSSA, and continued in the Phase Nb OSA north of the PSSA near the LOB. Ames began placement
of DCF in the Phase Nb OSA adjacent to the Phase IVa tie-in.
Ames hauled and placed ore in the Phase IVb PSSA and OSA for haul road construction in the eastern
portion of the PSSA and adjacent to the LOB.
Ames backfilled approximately 400 feet of Leak Detection Trench (LDT) on the south slope of
Substation Hill in the Phase Nb OSA azea.
Ames continued production of DCF at the screen plant located near the secondary crusher. Ames
resumed production of SLF.
Ames continued construction of the vertical risers in the Phase Nb PSSA sump, per project plans.
Ames hauled, placed, and compacted Soil Liner Fill (SLF) material into the Phase IVb OSA, on the
• south slope of Substation Hill. Rain-damaged SLF material was either removed and replaced, or
reworked and retested.
Ames hauled and placed Bedding Fill (BF) material into the Phase Nb OSA on the Phase III ore slope
adjacent to the east end berm in preparation for geomembrane deployment.
Poly-Flex continued deployment of 80-mil single-sided textured LLDPE geomembrarte in the Phase
IVb OSA. Geomembrane was placed in the Phase Nb OSA on the south slope of Substation Hill, neaz
the Phase Na/IVb and Phase IIUIVb tie-ins. Poly-Flex deployed 80-mil single-sided textured LLDPE
geomembrane over an area of approximately 250,830 squaze feet in the Phase IVb OSA during this
reporting period. Geomembrane panels B-184 through B-250 were deployed, seamed, and tested by
Poty-Flex. Destructive fusion and extrusion seam samples DFb-57 through DFb-75, and DXb-14
through DXb-18 were mazked and removed. Destructive fusion and extrusion seam peel and shear tests
on 80-mil single-sided textured LLDPE geomembrane deployed during this reporting period passed per
project specifications.
Poly-Flex deployed 100-mil smooth LLDPE geomembrane in the Phase IVb OSA adjacent to the east
end berm on the Phase III ore slope. Poly-Flex deployed 100-mil smooth LLDPE geomembrane over an
azea of approximately 7,616 squaze feet in the Phase Nb OSA during this reporting period.
Geomembrane panels B-208 through B-213 were deployed, seamed, and tested by Poly-Flex.
Destructive fusion and extrusion seam samples DFb-63 through DFb-64 and DXb-17 were mazked and
removed. Destructive fusion and extrusion seam peel and sheaz tests on 100-mil smooth LLDPE
geomembrane deployed during this reporting period passed per project specifications. A map of the
area worked during this reporting period is provided in Attachment C.
Phase lVb 22June15dwrc232003.doc Golder Associates lnc.