2004-10-18_REVISION - M1980244 ‎(24)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 10/18/2004
• Doc Name: Ph.IVc VOL.II Tech Specs
• From: Golder Associates Inc.
• To: DMG
• Type & Sequence: AM8
• Media Type: D
• Archive: No

PART 6.0 EARTHWORKS CONSTRUCTION OUALiTY ASSURANCE
Construction of the valley leach facility or specified earthworks shall be in accordance with the
• DRAWINGS and SPECIFICATIONS. A CQA monitoring and testing program shall be implemented by
CC&V to ensure construction compliance by the CONTRACTOR. The CQA testing program shall
consist of construction testing of materials used in the valley leach facility construction. The types of
materials are defined in the SPECIFICATIONS. During constuction, the CQA Monitor shall sample and
test these soil types to determine if they meet SPECIFICATIONS. The CQA Monitor shall obtain and test
soil samples in accordance with American Society for Testing and Material standards ASTM D75 and
ASTM D420. All tests shall be performed by the CQA Monitor on-site or in a geotechnical laboratory
approved by MANAGER.
6.01 CONSTRUCTION TESTING:
During construction, the CQA Monitor shall test all earthwork components to verify that the construction
is in accordance with the SPECIFICATIONS. Testing shall be performed on all soil used in the
construction to confirm the materials meet SPECIFICATIONS. The CQA Monitor shall conduct testing
after final placement of the materials. The tests to be performed, and the testing frequency, for each
material type aze listed in Tables 1 and 2. The testing frequencies specified in Tables 1 and 2 shall be
increased when the CQA Monitor determines that construction conditions (such as adverse weather,
equipment breakdown, improperly ballasted compactor, excessive lift thickness; improper soil type,
improper moisture conditioning and compaction) warrant additional tests. Additional tests will be
approved by MANAGER and dJrected by the CQA Monitor.
6.02 CONSTRUCTION MONITORING:
The CQA Monitor will monitor and test all earthwork quality assurance components of the construction to
verify that the construction is in accordance with the SPECIFICATIONS. The CQA Monitor shall
identify inadequate construction methodologies or materials that may adversely impact the performance of
• the facility being constructed and existing structures. The CQA Monitor will record visual observations
throughout the construction process to ensure that the materials are placed to the minimum dimensions as
shown on the DRAWINGS. Quality control testing will be performed by the CONTRACTOR.
6.02.01 FOUNDATION PREPARATION:
The CQA Monitor shall observe and document the foundation preparation including:
® stripping and excavation activities to ensure that CONTRACTOR places the material in
the appropriate stockpile (Structural Fill, Select Structural Fill, Underdrain Fill, Leak
Detection Fill, Low Volume Solution Collection Fill, Bedding Fill, Soil Liner Fill, Drain
Cover Fill, Fine Shaft Backfill, Pipe Bedding Material and Granulaz Filter Material), if
stockpiling is necessary;
® stockpiling activities to verify location of stockpile, material type, and dressing;
® excavations for moisture seeps, unsuitable foundation soil, elevation, and proper
drainage;
® subgrade preparation to confirm that the surface of the subgrade is free of soft, organic,
and otherwise deleterious materials (such as debris, branches, vegetation, mud, ice, or
frozen materials); and that soil and rock surfaces that contain joints or fractures aze
adequately filled in accordance with the SPECIFICATIONS;
• ®placement of end berm and regraded ore slope material to confirm that it complies with
Section 02200 of the SPECIFICATIONS; and,
Section 01400.1 Page 5 of 10 March 22, 2000
Earthworks CQA Plan Golder AssOCiates Revision 5
I:\O4JOB5\09]-21]OWC CERrQ~"ICATION REPORIIPHASE NC OSA CER]1APPENDIC~S~APPENDIX E TECFiMCAL SPECIFICAiiONS\01400IA5 DOC