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amec <br />Earth & Environmental <br />C) Best Management Practices (BMP) <br />Best Management Practices are being performed throughout the Phase 5 of the LOB project. <br />IV)LOB Geosynthetics <br />A) LLDPE Geomembrane 80 and 100 mil LLDPE <br />LOB Pad: Lone Star completed the deployment of approximately 36,050 square feet of <br />geomembrane liner on Wednesday. Panel numbers 1-17 were 80-mil LLDPE, smooth, which <br />encompassed approximately 34,530 square feet. The remaining panels, 18-21, were 100-mil <br />LLDPE textured one side (smooth side up), which encompassed approximately 1,520 square feet. <br />100-mil LLDPE textured one side was used to complete the pad because the contractor was short <br />of 80-mil LLDPE, smooth geomembrane. All geomembrane deployed, including seaming and <br />testing, is inspected and recorded by AMEC personnel. All trial welds observed, including 80-to <br />80 mil, 80-to 100 mil, and 100-to100 mil, were tested and recorded per the project specifications. A <br />total of 6-trial fusion welds were witnessed and recorded. There were no issues with destructive <br />sample testing on trial seams or compatibility with thickness was observed. 1,925 lineal feet of <br />fusion welding was observed. <br />On Thursday, all extrusion trial welds were witnessed and tested prior to start-up. 139 lineal feet <br />of extrusion welding was observed for the tie-in to the existing Phase IV Geomembrane. Four <br />patches were completed. Air channel testing was completed on 20 seams. All air channel tests <br />passed. Additional air testing will be completed next week, weather permitting. <br />Ambient temperatures ranged from 35°F to 40°F during the welding process, both days. The work <br />to date conforms to the Project specifications. <br />No destructive testing has been performed to date due to weather. Destructive samples however <br />have been marked on the seams at intervals less than every 500-feet. The remaining seam testing <br />and required destructive testing will commence, weather permitting next week. Vacuum testing is <br />scheduled for all patching and extrusion welding, weather permitting next week. <br />Lone Star Personnel: Equipment: <br />1-Foreman 1- Double fusion welder, 1-Extrusion,Welder <br />1-Seamer/Operator 2 Generators, 1 Tensiometer <br />4- Laborers 1-Fork Lift with a Spreader Bar <br />CQA ACTIVITIES: <br />SUMMARY: <br />The CQA activities performed consisted of observing, documenting and recording the construction <br />activities of the contractor. <br />Double shift work activities for the past week were overburden rock excavation and transport to the Joe <br />Dandy Main Cresson backfill area. The work concentrated within the upper and mid sections of the LOB <br />Delivery Road from station 30+00(+/-) advancing to station 25+50(+/-) and stations 2+00 (+/-) to 4+00 <br />Sheet 4 of 11 <br />LOB Weekly Report WE 04.18.09.D