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AO <br />CQA ACTIVITIES: <br />SUMMARY: <br />The CQA activities performed consisted of observing, documenting and recording the construction <br />activities of the contractor. <br />AMEC observed clear and grub activities performed by Seedmasters within the Mill Site Earthworks <br />project. <br />AMEC observed stripping and relocation of topsoil from within the Mill Site Earthworks project. <br />AMEC observed subgrade preparation within the Mill Site Earthworks project prior to structural fill <br />placement. Subgrade temperatures were monitored prior to fill placement. <br />AMEC observed excavation and placement of structural fill within the Mill Site Earthworks project. <br />Ambient, existing, and placed fill temperatures were monitored throughout the week. <br />AMEC observed remediation of UG #4000. <br />AMEC observed confirmatory drilling at UG #4007. <br />AMEC observed cleaning out and remediation of UG #4016. <br />AMEC observed collapsing of the crown pillars at UG #4024, UG #4025, and UG #4026 by blasting. <br />AMEC observed remediation of UG#4028. <br />AMEC observed the excavation of the collapsed crown pillar at UG #4029 and #4031. <br />AMEC observed investigation of UG #4044. <br />AMEC observed grouting of "miss" (non -void) holes at UG #4046. <br />AMEC observed confirmatory drilling at UG #4052. <br />AMEC observed grouting of "miss" (non -void) holes at UG #4052. <br />AMEC observed confirmatory drilling at UG #4053. <br />AMEC observed grouting of "miss" (non -void) holes at UG#4053. <br />AMEC observed investigation and remediation of UG #4050. <br />AMEC observed investigation and remediation of UG #4067. <br />AMEC observed the construction of the Secondary Underdrain under the Mill Site Fill area. <br />MEW Weekly Report WE 02.25.2012 <br />