REV15278

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Name: RELEVANT SECTIONS FROM FINAL REPORT CRESSON PROJECT QUALITY ASSURANCE MONITORING AND TEST RESULTS
• Type & Sequence: TR33
• Media Type: D
• Archive: No

8. CONTRACTOR shall assist CQA Monitor in obtaining soil samples for CQA
testing. Soil Liner Fill sampling shall be scheduled by CQA Monitor with
CONTRACTOR to facilitate CQA field testing.
9. CONTRACTOR shall maintain Soil Liner Fill stockpile areas in a free-
draining condition. The CONTRACTOR wilt maintain Soil Liner Fiil
stockpiles and Soil liner FiII placed within the limits of the Phase III valley
leach facility to prevent the drying out of [he surface.
10. CONTRACTOR shall compact corners and other areas inaccessible to
driven compaction equipment using hand-operated 500 pound vibratory
plate or vibratory smooth-drum compaction equipment approved by
MANAGER and CERTIFYING ENGINEER.
11. CONTRACTOR shall trim the surface of the Soil Liner Fill to the design
grades shown on the DRAWINGS.
12. CONTRACTOR shall roll the surface of the Soil Liner Fip with a smooth
drum roller to remove ridges and surface irregularities greater 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 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 or placing and compacting tailings as
approved by CQA Monitor.
13. 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 either Soil Liner Fill or tailings approved by CQA Monitor, and
compacted to achieve final grade. Areas of the Soil Liner Fill surface with
concentrated gravelly areas will have tailings approved by COA Monitor
placed on top and compacted to achieve final grade, A maximum
thickness of 0.5 inches of tailings will be placed on the Soil Liner Fill, with
no more than 60 percent of the Soil Liner Fill surface being covered by
tailings.
14. MANAGER and CERTIFYING ENGINEER will identity 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 detects. Desiccation sacks an 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&Y,
15. 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.
Section 02200 Page 12 of 15 March 2, 1999
Earthworks Golder Assodates Aevision 6