2014-02-07_REPORT - M1980244 (3)

Home Browse Search

Cripple Creek & Victor Gold Mining Company PSES Pipe Rack Liner Extension Final Report Duality Assurance Monitoring & Test Results February 4, 2014 ameO 1.2 Construction Quality Assurance /Construction Quality Control AMEC provided CQA and CQC monitoring and testing services, and prepared this report describing the monitoring and test results for the PSES Pipe Rack Liner Extension. As -built drawings and supporting CQA monitoring and testing documentation are presented in appendices attached to this report. 1.2.1 CQA Monitoring of Earthworks AMEC provided CQC testing and CQA testing and monitoring of earthworks for the PSES Pipe Rack Liner Extension. CQA testing and monitoring of earthworks was provided in accordance with the AMEC Earthworks CQA Plan (Section 1400.1 of the Specifications; located in Appendix E). The earthworks material specifications for this project are summarized in Table 1. CQC earthworks testing was provided to support the contractor during the manufacture of materials and prior to material placement. The CQC test results are not included in this report as these tests were intended to assist the contractor with materials preparation rather than record testing. All CQA testing results are included. AMEC provided CQA laboratory and field testing, and monitored earthworks construction activities as follows: • AMEC visually monitored random fill subgrade preparation to confirm the subgrade surface was unyielding, free of organic matter and other unsuitable materials. • AMEC visually monitored the placement of Drain Cover Fill (DCF) above the primary geomembrane in the PSES Pipe Rack Liner Extension, including verification of lift thickness and grade control; identification and removal of deleterious materials; and verification that care was exercised during fill placement to avoid geomembrane damage. AMEC performed CQA laboratory testing of grain size, Atterberg limits, and moisture contents. • AMEC visually monitored the compaction of Drain Cover Fill (DCF) in accordance with the specification amendment letter which can be found in Appendix E.2. AMEC observed all compaction of DCF material to ensure that care was taken to avoid geomembrane damage during compaction. • AMEC monitored the ambient air temperatures and weather in accordance with project specifications. The ambient air and daily weather observations during construction activities are summarized in Table 2. 1.2.2 CQA/CQC Monitoring of Geosynthetics Installation AMEC provided CQA monitoring of geosynthetics used for the PSES Pipe Rack Liner Extension. CQA services consisted of performing geosynthetics inventory and checking quality control certifications prior to geosynthetics deployment. AMEC 2