2014-02-07_REPORT - M1980244 ‎(8)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 2/7/2014
• Doc Name: Final Report QA Monitoring and testing volume 2 of 2 document 1 of 3Mill Site Earth works
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

ameO
3.05 SUBGRADE:
A. The MANAGER and CERTIFYING ENGINEER will inspect and approve the exposed subgrade
prior to any fill or Soil Liner being placed. CQA Monitor will confirm that the surface of the
subgrade is smooth and free of debris,grade stakes, angular rocks,roots,branches,vegetation,mud,
ice,or frozen material. If the subgrade is determined to be frozen,using the criteria identified in Item
3.06.10 of Section 2200,the CONTRACTOR may either remove and replace the frozen subgrade
or wait until subsequent temperature monitoring indicates the fill is unfrozen, at no cost to CC&V.
The subgrade shall have no sudden sharp or abrupt changes in grade.
B. CONTRACTOR is responsible for maintaining subgrades in a condition satisfactory to
CERTIFYING ENGINEER. CONTRACTOR shall protect prepared subgrades, including
previously approved subgrade, from weather, construction equipment,or other factors as outlined in
Part 3.06 of the SPECIFICATIONS. Subgrade surfaces, including previously approved subgrade,
that become softened or otherwise unsuitable for placement of fill, shall be repaired to
CERTIFYING ENGINEER's and MANAGER's satisfaction,at no cost to CC&V.
C. Prior to placement of fill materials,CONTRACTOR shall scarify all in-situ materials to a depth of
6-inches, moisture condition, and recompact the subgrade. Compactive effort shall be adequate to
obtain a minimum of 95 percent of maximum dry density as determined by the standard Proctor test
(ASTM D698) for the particular fill material. Moisture conditioning shall be adequate to achieve a
uniform moisture and density. In rock areas, the CONTRACTOR shall prepare the subgrade by
removing loose rock fragments until competent foundation material is encountered as approved by
CERTIFYING ENGINEER.
D. If the underlying material is unsuitable to permit proper compaction of the subgrade,
CONTRACTOR shall loosen, aerate (or excavate and remove), and recompact the subgrade until
the top layer can be compacted as required. The recompacted surface shall then be scarified, as
needed,to provide a good bond between the foundation and fill materials.
3.06 FILL PLACEMENT:
A. The following general guidelines shall be followed except as noted elsewhere in this Section.
1. No fill materials shall be placed until the foundation and subgrade preparations have been
completed as specified herein, in Article 3.05 of this Section. The procedures for fill
placement shall be approved by MANAGER and CERTIFYING ENGINEER prior to
start of fill placement.
2. No brush, roots, sod, frozen material, or other deleterious or unsuitable materials shall be
incorporated in the fills. The suitability of all materials intended for use in the fill shall be
subject to approval by MANAGER and CERTIFYING ENGINEER. Fill placement
shall be temporarily stopped by CONTRACTOR due to weather conditions, if materials
and installation do not meet the SPECIFICATIONS, at no cost to CC&V. Fill shall not be
placed upon frozen material,such as snow or ice.
3. If the surface of the prepared foundation or the surface of any layer of the fill is too dry or
too smooth to bond properly with the layer of material to be placed thereon, it shall be
moisture-conditioned and/or worked with harrow, scarifier, disc, or other suitable
equipment to provide a satisfactory bonding surface before fill material is placed thereon. If
the surface of the prepared foundation or the rolled surface of any layer is excessively wet
for fill materials to be placed thereon, it shall be removed and allowed to dry or worked
with a harrow, scarifier,disc,or other suitable equipment to reduce the moisture content to
Section 02200 Page 7 of 16 May 9,2012
Earthworks Revision 1