2011-10-06_REVISION - M1980244 (3)

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Section 02200 Earthworks D. Underdrain Fill ame of passes shall be subject to CERTIFYING ENGINEER's approval, at no additional cost to CC &V. The method SPECIFICATIONS may be changed at any time, at the discretion of CERTIFYING ENGINEER, based upon changes in material characteristics, field conditions, and/or compaction equipment. 1. Underdrain Fill shall be placed in the Underdrains as shown in the DRAWINGS. 2. CONTRACTOR shall condition Underdrain Fill that results in a firm, unyielding surface capable of allowing the movement of vehicles and equipment over the surface without causing rutting or other deleterious effects. 3. CONTRACTOR shall condition, place and compact Underdrain Fill by a method compaction technique. The compaction equipment shall consist of a minimum 10 -ton (static drum weight) vibratory smooth -drum compactor. The number of passes and loose lift thickness shall be subject to CERTIFYING ENGINEER's approval, at no additional cost to CC &V. The method SPECIFICATIONS may be changed at any time, at the discretion of MANAGER, based upon changes in material characteristics, field conditions, and/or compaction equipment. 4. Provisions shall be made by CONTRACTOR for removal of oversize materials from fills, at no additional cost to CC &V. 5. The MANAGER will minimize the amount of traffic over the Underdrain Fill. E. Leak Detection Fill 1. Leak Detection Fill shall be placed in the Leak Detection Trenches as shown on the DRAWINGS. 2. CONTRACTOR shall condition Leak Detection Fill to allow a surface that does not cause rutting or other deleterious effects. F. Low Volume Solution Collection Fill 1. Low Volume Solution Collection Fill shall be placed over the geomembrane in the locations shown on the DRAWINGS. 2. CONTRACTOR shall condition Low Volume Solution Collection Fill to allow a surface that does not cause rutting or other deleterious effects. 3. CONTRACTOR shall place Low Volume Solution Collection Fill around the Low Volume Solution Collection Vertical Riser Pipes in maximum 12 -inch loose lifts and compact using a hand operated vibratory plate compactor to the satisfaction of the MANAGER and CERTIFYING ENGINEER. Low Volume Solution Collection Fill shall be worked under the Low Volume Solution Collection Rise pipe haunches by hand to provide uniform support of the pipe. 4. Prior to placing the Low Volume Solution Collection Fill, CONTRACTOR shall verify by visual inspection that the underlying geosynthetics are free of holes, tears, wrinkles, or foreign objects. MANAGER and CERTIFYING ENGINEER will inspect the S: \Projects \1125G Squaw Gulch Valley Leach Facililty Design \I - Tech Specs \02200.r0.doc Page 11 of 18 January 14, 2011 Revision 0