REP00443

• Permit No: M1988112
• IBM Index Class Name: Report
• Doc Date: 2/16/1996
• Doc Name: SAN LUIS PROJECT PHASE II EMBANKMENT RAISE 2 CONSTRUCTION REPORT
• Media Type: D
• Archive: No

' 4.0 CONSTRUCTION QUALITY ASSURANCE AND QUALITY CONTROL (QA/QC)
4.1 General
SRK, the design firm, was retained by BMRI to provide QA/QC testing and full-time on-site
monitoring of the Contractor's activities. This QA/QC testing and monitoring wa;; required and
described in the original permit and permit amendment.
In addition, the owner implemented QA/QC monitoring procedures to further verify that the
t design objectives were met. The QA/QC adopted by the owner included visual inspection and
acceptance/rejection of all earthwork and monitoring all contractor safety procedures. These
' QA/QC procedures were outlined in the Technical Specifications presented in the Phase II Raise
2 Design Report.
Details of the QA/QC monitoring and testing results are described in the following sections.

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4.2 Earthwork
QA/QC testing of the raise fill resulted in no failing insi[u densities. All compaction tests met
or exceeded the minimum 85 percent of maximum dry density (ASTM D-698) specified.
Gradation tests indicated that the fill material has met the specification requirements.
A summary of all QA/QC testing for the raise fill is contained in Appendix A to this report.
4.3 Settlement Markers
Review of the settlement monitoring data indicated that the Bulk of the settlement occurred
during construction with no significant differential settlement. No signs of excess. ve settlement
of the tailings along the upstream toe of the raise, such as heaving or cracking, was observed
at any point during construction.
As of the October 17, 1995 survey the maximum settlement indicated by the readings has been
0.365 ft. Settlement marker locations and monitoring data are presented in Appendix B to this
report. Some of the settlement markers were damaged during construction and monitoring of
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