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fill was placed in 18 to 24 inch lifts and compacted with the excavator bucket. Additional remediation work is <br />required. <br />UG #U6274 Unknown Adit and shaft: <br />A Cat 345 excavator was used to excavte approximately 75 feet lineal feet of the adit to competent rock and to <br />expose the shaft. The shaft was prepared for a concrete plug. Additional remediation work is required. <br />UG #U6493 Unknown Shaft: <br />A Cat 330 excavator backfilled the working with structural fill. The structural fill was placed in 18 to 24 inch lifts and <br />compacted with the excavator bucket. The working is considered remediated. <br />UG #U6156 Unknown Adit: <br />A Cat 330 excavator excavated the adit approximately 60 lineal feet to competent rock. The working was backfilled <br />with structural fill. The structural fill was placed in 18 to 24 inch lifts and compacted with the excavator bucket. The <br />working is considered remediated. <br />UG #U6183 known collapsed adit: <br />A Cat 330 excavator removed shot rock from the working and the backfilled it with structural fill. The structural fill <br />was placed in 18 to 24 inch lifts and was compacted with the excavator bucket. The working is considered <br />remediated. <br />11) Storm Water Management <br />Best Management Practices (BMP) is being performed. Erosion control efforts took place during this reporting <br />period following any precipitation (snow removal and runoff from melting snow and ice). <br />CQA ACTIVITIES: <br />1) Field Activities: Observation of construction activities during this reporting period included: Slope grading and fill <br />placement; Ambient and fill temperature monitoring and recording; Underground working remediation and confirmatory <br />drilling; Production drilling and blasting; Water pond construction; Secondary underdrain installation; Testing and <br />sampling for Y2:1 slope grout, SF; DCF and SLF; 100 -mil LLDPE SSMS geomembrane and LDPE 5mm weld rod <br />delivery and inventory. <br />tr) Laboratory Activities: Laboratory testing continued with Permeability, Particle Size Distribution, Atterberg Limits, <br />Moisture - Density relationships, gradations, material classification, identifications, and field material sampling were <br />performed during this reporting period. <br />The following samples were collected and returned to AMEC's laboratory for analysis: <br />Structural fill sample numbers SF -52R through SF -67R <br />Drain Cover Fill sample numbers DCF 67 and DCF 69 <br />Soil Liner Fill sample number SLF 129 -S <br />Cast grout cubes for strength testing from the %:1 slope <br />Note: Samples labeled with the suffix "R" are samples of Record I QA samples; those without are QC samples. <br />General Project Items <br />Meetings and Discussions: The Contractor Meeting occurred on April 2, 2014 with CC &V Projects, AMEC, and Ames. <br />Summary of Concems: None. <br />CC &V: Daily updates, reporting and scheduling are some of the tasks occurring between CC &V Projects, AMEC, and Ames. <br />Page 3 of 7 MLE2 WE 05 April 2014.doc <br />