2012-12-27_REPORT - M1980244 (17)

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Section 02200 Earthworks ameel areas with slopes steeper than 3H:1 V, CONTRACTOR shall adopt methods as necessary to obtain the same final 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 Soil Liner Fill from grading equipment shall be repaired by CONTRACTOR prior to placement of the geomembrane by rolling the surface as approved by CQA Monitor. 12. CONTRACTOR will remove angular protruding rocks greater than 3/4 inches in diameter from the compacted Soil Liner Fill surface. Indentations left in the Soil Liner Fill Surface after removal of the rocks shall be filled with Soil Liner Fill or other suitable fill approved by CQA Monitor, and compacted to achieve final grade. Areas of the Soil Liner Fill surface with concentrated gravelly areas will have suitable fill approved by CQA Monitor placed on top and compacted to achieve final grade. A maximum thickness of 0.5 inches of suitable fill will be placed on the Soil Liner Fill. 13. MANAGER and CERTIFYING ENGINEER will identify any areas of significant desiccation, crusting, or erosion of a lift surface. Soil Liner Fill surfaces found to have desiccation cracks greater than 0.25- inches in width or depth, or which exhibit swelling, heaving or other similar conditions shall be replaced or reworked by CONTRACTOR to remove such defects. Desiccation cracks on the Soil Liner Fill surface less than 0 25- inches in width or depth shall be compacted with a smooth drum roller. 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. 14. CONTRACTOR shall maintain the Soil Liner Fill surface in a condition suitable for geomembrane installation as specified in these SPECIFICATIONS and in the CQA Plan until the surface is covered. CONTRACTOR shall repair all weather related damage to Soil Liner 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 Soil Liner 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. 15. CONTRACTOR shall remove all hubs and survey stakes in the Soil Liner Fill and backfill all holes with MANAGER and CERTIFYING ENGINEER approved moisture - conditioned Soil Liner Fill or bentonite. Compact with a Proctor hammer or other suitable device that will achieve a kneading type of compaction and will achieve the required density. 16. CONTRACTOR shall verify the final thickness of Soil Liner Fill to determine compliance with this SPECIFICATION. Thickness verification shall be performed at a minimum frequency of two measurements per acre using a soil -coring device, unless directed otherwise by MANAGER. CONTRACTOR shall record as part of the as -built documentation the location, elevation, and thickness of each Soil Liner Fill verification test. CQA Monitor will witness all verification measurements. CONTRACTOR shall backfill all holes with MANAGER and CERTIFYING ENGINEER approved moisture - conditioned Soil Liner Fill compacted with a Proctor hammer or other suitable device that will achieve a kneading type of compaction and will achieve the required density, or bentonite. Areas with deficiencies shall be reworked by CONTRACTOR, until acceptable measurements are obtained at no additional cost to CC &V. P \Phase 5 OSA 2011 Cert Report \Appendices\Appendix E Specifications \02200 r1 doc Page 14 of 18 September 3, 2008 Revision 1