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• <br />• <br />• <br />amec <br />Earth & Environmental <br />geotextile between stations 16 +00 ( + / -) and 24 +50 ( + / -) using a CAT 966 front -end loader, a CAT D6 <br />dozer, and a 10 -ton smooth drum compactor. Three nuclear density tests were performed with passing <br />results. Moisture - density relations were performed in accordance with ASTM D698 -07. The <br />remaining portion of the excavated trench between station 16 +00 ( + / -) and 24 +50 ( + / -) was backfilled <br />with structural fill. Structural fill was placed in 18" to 24" lifts using various CAT dozers. Each lift <br />was moisture conditioned using a CAT 773 water truck (when necessary) and compacted using a 10- <br />ton vibratory smooth drum compactor, passing over the entire fill surface at least 4 times (method <br />compaction technique is applicable). The Primary underdrain construction is complete. <br />VI)VLF Closure Drains <br />Excavation of northwest closure drains was performed using a John Deere 850 excavator. Due to hard <br />rock encountered at the design location the closure drain was relocated near station G11 +00 ( + / -), <br />approximately 200 feet left of centerline. This was discussed with John Lupo (Certifying Engineer) <br />and was approved. An AMEC field representative inspected and accepted the subgrade at the <br />northwest closure drain. Three -feet of underdrain fill material was placed in the north west closure <br />drain using a CAT 966 front -end loader. <br />Geotextile (10oz. /yd was placed over the underdrain fill material at the northwest and northeast <br />closure drain locations, installing approximately 5,000 square feet. The geotextile was inspected by an <br />AMEC field representative and found to be acceptable for structural fill placement. Structural fill was <br />placed in 18" to 24" lifts using various CAT dozers. Each lift was moisture conditioned using a CAT <br />773 water truck (when necessary) and compacted using a 10 -ton vibratory smooth drum compactor, <br />passing over the entire fill surface at least 4 times (method compaction technique is applicable). <br />The northwest and northeast closure drains are complete. <br />VII)VLF Geosynthetics <br />Six loads of 100mil LLDPE geomembrane were delivered to site during the week for a total of 67 <br />rolls. All loads were delivered on flat bed trucks in good condition. The rolls were unloaded using a <br />CAT 966 front -end loader with forks attached. The geomembrane was placed on three pieces of 4" <br />HDPE pipe, staked two rolls high. An AMEC field representative was present at all times during <br />unloading of the geomembrane. The AMEC representative also inventoried to geomembrane as it was <br />unloaded. <br />The Phase IV geomembrane was exposed between stations G +00 ( + / -) and G5 +00 ( + / -), <br />approximately 75 feet left of centerline and between stations G9 +80 ( + / -) and G10 +00 ( + / -) , <br />approximately 75 feet left of centerline using a John Deere 35D excavator and a laborer. This was <br />performed preparing for the tie -in. An AMEC field representative was present at all times during <br />geomembrane exposure. <br />CQA ACTIVITIES: <br />SUMMARY: <br />The CQA activities performed consisted of observing, documenting and recording the construction <br />activities of the contractor. <br />VLF Weekly Report WE 04.17.10.D <br />