Laserfiche WebLink
ame <br />B) Geomembrane Exposure <br />1) VLF <br />Exposure of previously installed geomembrane between stations E22 +50 ( + / -) and E23 +00 <br />( + / -) was performed using a John Deere 35D excavator and laborers. An AMEC field <br />representative observed the geomembrane exposure constantly. <br />Anchor trench backfill was performed between stations H0 +00 ( +1 -) and H4 +50 ( + / -), near <br />centerline using a John Deere 35D excavator, a vibratory plate compactor and laborers. An <br />AMEC field representative observed the backfill and it was found to be constructed in <br />accordance with design drawings and project specifications. <br />IV) VLF Geosynthetics <br />A) Geomembrane Installation <br />1) VLF <br />Geomembrane installation within the Phase 5 VLF resumed performing deployment, seaming, <br />and repair /QC activities. Geomembrane installation was performed in the area shown on <br />Figure 3. Approximately 381,591 square feet of 80mil LLDPE was deployed using a Komatsu <br />200 excavator and a John Deere 544 front -end loader with spreader -bar attachments. Subgrade <br />was inspected and approved by AMEC and Lonestar representatives prior to geomembrane <br />deployment (see Figure 3). Approximately 18,801 linear feet of seam was fusion welded using <br />five fusion welding machine /welding technician combinations. Forty destructive test samples <br />were marked during fusion seaming. Approximately 380 linear feet of seam was extrusion <br />welded using one extrusion welding machine /welding technician combinations. Three <br />destructive test sample was marked during extrusion seaming. All destructive tests performed <br />were within project specifications. Non - destructive testing was performed for fusion welded <br />seams. Repairs were performed using the extrusion welding method for all marked defects. <br />Vacuum testing was performed for all extrusion welded seams and repairs. <br />During the Cresson blast, an AMEC field representative observed the geomembrane and no <br />damage was noted. <br />C) Anchor Trench <br />1) VLF <br />Temporary anchor trench excavation continued between stations A3 +50 ( + / -) and A4 +00 ( + / -), <br />near centerline, between stations A31 +00 ( + / -) and A36 +00 ( + / -), near centerline, and between <br />H0 +00 ( + / -) and H2 +75 ( + / -), approximately 200 feet left of centerline, using a John Deere <br />35D excavator and one laborer. The anchor trench was inspected by an AMEC field <br />representative and found to be constructed in accordance with design drawings and project <br />specifications. <br />D) Geomembrane Acceptance <br />1) VLF <br />Primary 80mil geomembrane (P598 -P634) shown on Figure 4 was inspected by AMEC and <br />Lonestar representatives and found to be installed within project specifications and acceptable <br />for continued construction activities. <br />VLF Weekly Report WE 08.20.2011 <br />