2011-10-06_REVISION - M1980244 (3)

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Section 02200 Earthworks G. Soil Liner Fill ame measurements have been approved by MANAGER and CERTIFYING ENGINEER and will backfill holes with Low Volume Solution Collection Fill. Areas with deficient thickness shall be reworked by CONTRACTOR, until acceptable measurements are obtained. If MANAGER or CERTIFYING ENGINEER suspects the occurrence of any damage to the underlying geosynthetics, MANAGER will instruct CONTRACTOR to remove Low Volume Solution Collection Fill to expose the geosynthetics. CONTRACTOR shall uncover, repair any observed damage of the underlying geosynthetics, in accordance with the repair requirements of Sections 02776.0 and 02777.0 of these SPECIFICATIONS and recover, at no cost to CC &V. 12. CONTRACTOR will provide adequate illumination as approved by MANAGER, if Low Volume Solution Collection Fill placement is carried out at night. A minimum of 2 -foot candles measured at the synthetic liner, shall be used when Low Volume Solution Collection Fill placement is carried out at night. 1. Soil Liner 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 Structural Fill placement in the valley leach facility. 2. CONTRACTOR shall process, place and compact the Soil Liner Fill to achieve a coefficient of permeability of less than 1xle cm/sec, measured according to ASTM Method D5084, Method D. Any Soil Liner Fill not meeting the permeability specification shall be removed and replaced with material meeting the permeability specification, at no additional cost to CC &V. 3. CONTRACTOR shall place and compact the Soil Liner Fill in loose lifts such that the compacted lift thickness is a minimum of 12- inches. 4. CONTRACTOR shall compact the Soil Liner Fill to at least 95 percent of the maximum dry density as determined by the Standard Proctor density test (ASTM D698). The moisture content shall be within +3% to -2% of the optimum moisture content. Both moisture and density shall be uniform throughout the lift. If the Soil Liner Fill cannot be conditioned to meet the placement specifications, the material shall be removed and replaced with new Soil Liner Fill at the CONTRACTOR's expense. The CONTRACTOR shall reduce the clod size of the soil liner fill to a size that is acceptable to the CERTIFYING ENGINEER, the method by which will be approved by CERTIFYING ENGINEER and MANAGER prior to implementation. 5. The moisture content of the Soil Liner Fill shall be uniform throughout prior to and during compaction of the material. CONTRACTOR shall be responsible for meeting moisture content and compaction SPECIFICATIONS. If the Soil Liner Fill cannot be conditioned to meet the placement SPECIFICATIONS, the material shall be removed and replaced with new Soil Liner Fill at no additional cost to CC &V. MANAGER may require CONTRACTOR to moisture condition Soil Liner Fill at stockpile at least 24 hours prior to the Soil Liner Fill being placed. 6. CONTRACTOR shall place Soil Liner Fill to form a continuous monolithic material. If a lift of compacted Soil Liner Fill dries out during placement operations, CONTRACTOR shall scarify, moisture condition the dry soil and recompact the lift. If a lift of compacted S: Projects \1125G Squaw Gulch Valley Leach Facililty Design \I - Tech Specs \02200.r0.doc Page 13 of 18 January 14, 2011 Revision 0