2004-10-18_REVISION - M1980244 (24)

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Bedding Fill 1. Bedding Fill shall be placed within the limits of the valley leach facility as shown on the • DRAWINGS and shall begin only after completion of all, or MANAGER and CERTIFYING ENGINEER approved portion of, excavation and placement of the ore slope regrading and end berm material in the valley leach facility. 2. CONTRACTOR shall place and compact the Bedding Fill in loose lifts such that the compacted lift thickness is a minimum of 12-inches. CONTRACTOR shall conditon the Bedding Fill to allow a surface that does not cause rutting or other deleterious effects. The moisture content and density shall be uniform throughout the lift. If a lift of compacted Bedding Fill dries out during placement operafions, CONTRACTOR shall scarify, moisture condition the dry soil and recompact the lift. If a lift of compacted Bedding Fill becomes overly wet due to precipitation or over watering, CONTRACTOR shall allow the wet soil [o dry to the specified moisture content range before recompaction of fill and placement of geosynthetic materials. 3. CONTRACTOR shall assist CQA Monitor in obtaining soil samples for CQA testing. Bedding Fill sampling shall be scheduled by CQA Monitor with CONTRACTOR to facilitate CQA field testing. 4. CONTRACTOR shall trim the surface of the Bedding Fill to the desigtt grades shown on the DRAWINGS. 5. CONTRACTOR shall roll the surface of the Bedding Fill with a smooth dnun roller to remove ridges and surface irregularities Beater than 0.5 inches in height. CERTIFYING ENGINEER shall determine if surface preparation is sufficient to place geomembrane. On areas with slopes steeper than 3H:1 V, CONTRACTOR shall adopt methods as necessary to obtain the same fmal surface preparations that would be obtained by the passage of a smooth-drum roller on flat or level ground. Pushing of compaction equipment by tracked equipment shall not be performed. Wheel ruts on the surface of the Bedding Fill from grading equipment shall be repaired by CONTRACTOR prior to placement of the geomembrane by rolling the surface or placing and compacting tailings as approved by CQA Monitor CONTRACTOR shall take whatever steps necessary to prepare Soil Liner Fill surface to the satisfaction of MANAGER and CERTIFYING ENGINEER, at no additional cost to CC&V. 6. CONTRACTOR shall maintain the Bedding Fill surface in a condition suitable for geomembrane installation as specified in these SPECffICATIONS and in the CQA Plan until the surface is covered. CONTRACTOR shall repair all weather related damage to Bedding Fill surfaces or other portions of the Work that have or have not been covered by geomembrane, at no additional cost to CC&V. If any moisture is allowed to collect under the geomembrane prior to or after final seaming and softens the Bedding Fill, the geomembrane shall be removed and CONTRACTOR shall recondition and recompact the Soil Liner Fill to meet all placement and trimming SPECIFICATIONS, at no additional cost to CC&V. CONTRACTOR shall remove all hubs and survey stakes in the Bedding Fill and backfill all holes with MANAGER and CERTIFYING ENGINEER approved material. 8. CONTRACTOR shall verify the final thickness of Bedding FIII to determine compliance with this SPECIFICATION. CONTRACTOR shall record as part of the • as-built documentation the location, elevation, and thickness of each Bedding Fill verification test. CQA Monitor will witness all verification measurements. Areas with Section 02200 Page 16 of 17 Mazch 22, 2000 Earthworks Golder Associates Revision 7 I:~04IOHSO43~21 ~OUVC CER1iFICA]'tON REPOR2IPHASE NC OSA CER"MPPENDICIESWPPENDIX E TECERJICAL $PECIFICAiIONSW2200R1DOC