ARCHIVED REPORTS_2010_21 - Laserfiche WebLink

Home Browse Search

i Field Panel Identification: Prior to geomembrane deployment, Ausenco Vector's CQA Monitor and Comanco discussed and agreed to the identification code for each panel deployed. During the deployment, Ausenco Vectors CQA Monitor observed that the installer marked the panels deployed and that each panel placed was marked with the manufacturers roll number. Field Panel Placement: During the panel placement, the Ausenco Vector CQA monitor recorded information in the Panel Deployment Logs. These logs recorded the location (panel number, roll number, date and time. Also recorded was the ambient temperature and current weather conditions (wind speed, cloud cover, etc.), and thickness of the sheet. Designation of double -side textured geomembrane was assigned a prefix of "DST" and the single -side textured geomembrane was assigned a prefix of "SS". The SS liner deployed on the 5:1 slope consisted of 21 panels; listed on the Deployment Logs as P-1 through P-21. The DST liner on the floor consisted of 57 panels; listed as P-1 through P-57. Some of the DST panels on the north end of the floor were connected to the SS liner panels on the slope with the same panel numbers; these particular panels include the letter "S" for liner on the slope; and "F" for the panels on the floor, e.g., panels 1 F/2S would be DST panel P-1 on the floor seamed to panel P-2 on the slope. The Deployment Logs are presented within Appendix I. 5.3.2.2 Field Seaming Seam Layout: Then Ausenco Vector CQA monitor documented the seaming of the HDPE liner in the Seam/Pressure Test Logs. Seam numbers are determined by the panel numbers, i.e., seam 21/22 is the connection between HDPE panels 21 and 22. Seaming Equipment and Products: The Ausenco Vector CQA monitor observed that the seaming equipment used by the liner installer was in accordance with the project specifications. In addition, Ausenco Vector CQA observed that the extrudate (welding rod) used was compatible with the geomembrane material and was comprised of the same resin as the geomembrane. The liner installer, COMANCO, seamed the HDPE geomembrane panels using double wedge and extrusion welding techniques. The majority of seams were joined using double wedge welders, with difficult geometry and repairs made using extrusion welders. The Ausenco Vector CQA monitor observed the seaming activities, and observed each seam for sufficient panel overlap, cleanliness, grinding where required, and the speed and the temperatures of the equipment being used. Documentation of the activities was recorded on the geomembrane Seaming Logs, which includes information on the seam numbers, date, time, welding machine, welding technician, machine temperature and speed, ambient temperature and wind conditions. The geomembrane Seam/Pressure Testing Logs are included in Appendix I. Seam Preparation: The Ausenco Vector CQA monitor observed that the preparation of the seams was in conformance with the project specifications, and that the seam area was clean, free of moisture, debris or any foreign material that could cause leaks or irregularities during the seaming process. Weather Conditions for Seaming: The Ausenco Vector CQA monitor observed and documented that the weather conditions for seaming were within the project specifications and manufacturers recommended guidelines. Trial Seams: Prior to seaming activities at the beginning of each day, and at a minimum once during the middle of the shift, a trial seam (start-up trial weld) was prepared for each of the wedge and extrusion welders used for that shift. The seaming technicians prepared a test specimen and marked the sample with the machine number, machine temperature, date, time, and operator name. Date: October 2010 US%004800 Final Construction Quality Assurance Report 20