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ame <br />density testing, moisture verification, and depth check testing was performed with results <br />within project specifications. Test locations were surveyed by Ames. <br />D) High Volume Solution Collection System <br />1) High Volume Solution Collection Piping <br />Placement of the high volume collection system continued at the DCF placement area shown <br />on Figure 5, advancing in front of the placement. CPeP was placed and sandbagged in <br />accordance with design drawings and project specifications. <br />2) Drain Cover Fill (DCF) <br />Drain cover fill (DCF) placement within the Phase 5 VLF continued. DCF was placed in the <br />areas shown on Figure 5. The DCF was hauled from the processing area to the placement area <br />using 40 -ton articulating haul trucks. The DCF was placed in a 2 -foot lift using various CAT <br />dozers except where haul routes were established. Haul route consisted of five -foot lifts to be <br />spread into 2 -foot lifts later. Laborers were present at all times during placement holding the <br />high volume collection piping in place, removing debris /sandbags, and assisting the dozer <br />operator with lift thickness. All DCF was placed on previously approved primary <br />geomembrane. AMEC field representatives monitored the DCF placement constantly. <br />E) Leak Detection Trench <br />1) VLF <br />A portion of the leak detection system was installed between stations J18 +00 ( + / -) and J23 +00 <br />( + / -), approximately 20 to 50 feet left of centerline. The l'xl' trench was excavated using a <br />CAT 312 excavator. 40mil HDPE geomembrane and 12oz /ft geotextile were placed in the <br />trench. Three -inch CPe pipe was then placed over the geotextile. Approved leak detection fill <br />(LDF) was placed in the trench using a skid steer loader and laborers. The geotextile was <br />wrapped and overlapped, encapsulating the LDF and 3" CPe pipe. SLF material was then <br />placed over the trench. Leak detection trench construction was observed and inspected by an <br />AMEC field representative and found to be constructed in accordance with design drawing and <br />project specifications. <br />F) Underground Working <br />1) Remediation <br />A small amount of settlement was noticed and monitored by an AMEC representative in an <br />area designated as Underground Working. After discussion with Ron Roberts (CC &V) and Jay <br />Moore (AMEC) it was decided to install a two -layer geogrid cap in the area. Remediation <br />Underground Working #3014 area was performed with the placement of a 75' x 75' two -layer <br />geogrid cap was installed. Six - inches of select structural fill was placed below, between, and <br />above each geogrid layer. The material was hauled from the stockpile area using 40 -ton <br />articulating haul trucks loaded using a CAT 950 front -end loader. The material was spread <br />using a skid steer loader, moisture conditioned, and compacted using a CAT 563 vibratory <br />smooth drum compactor. One nuclear density test was performed for each lift with passing <br />results. The area was backfilled with structural fill material in one 1 -foot lift using a CAT D6 <br />dozer. Material stockpiled during excavation was replaced in the area. Compaction was <br />VLF Weekly Report WE 09.24.2011 <br />