2003-05-30_REVISION - M1980244 (4)

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Phase IVb Weekly Summary No. I7 Pale 3 003-2203 Geomembrane panels M-637 through M-654 were deployed, seamed, and pressure tested by Poly-Flex. Destructive fusion seam samples DF-172 through DF-174 and extrusion seam samples DX 33 were marked and removed. Destructive fusion and extrusion seam peel and shear tests of these samples were not performed during this reporting period. A map of the azea worked is provided in Attachment C. Phase Nc Ames continued limited cut and placed the material in temporary stockpiles within the limits of the Phase Nc area. Field Monitoring and Tesfin¢ Activities Golder observed construction activities associated with Phase IV earthworks. All construction materials and soil materials placed were verified as suitable, and construction methods were in accordance with project specifications. Removal of oversized or deleterious material from all fill areas was observed. Golder observed SF placement in Phase N for materials, lift thickness, moisture content, and compactive effort. Golder observed re-compaction of LVSCF in the Phase Nb PSSA sump after rainfall flooded the azea. The HVSCS riser foundations were compacted and re-graded. Golder CQA monitors performed four nuclear moisture-density tests (LVSCNb-Ola through LVSCNb-04a) on LVSCF re- compacted within the Phase Nb PSSA sump. The tests performed met the requirements of the specifications and the nuclear moisture-density results summary is presented in Attachment B. Golder visually observed the placement and grading of LVSCF in the Phase Nb PSSA area. Golder CQA monitors (one monitor per dozer when dozers are greater than 50 ft apart) observed LVSCF placement and verified minimum thickness of 3 feet. Golder visually observed the placement of DCF in the Phase Nb PSSA area. Golder CQA monitors (one monitor per dozer when dozers are greater than ~0 ft apart) observed DCF placement and verified minimum thickness of 2 feet. Golder observed anchor trench excavation in the Phase IVb PSSA and OSA for proper location and dimension (2' wide by 3' deep). Anchor trench excavation met or exceeded the requirements of the specifications. Golder observed anchor trench backfill in the Phase Nb PSSA for lift thickness and compaction. Golder observed construction of the Primary Underdrain in Phase Nb for trench dimension (5' wide by 3' deep), slope (minimum 1%), materials, and geotextile overlap. Primary Underdrain construction met or exceeded the requirements of the specifications. Golder observed and monitored placement of Bedding Fill (BF) in the Phase Nb PSSA for proper location and thickness (1' deep). Golder monitored compactive effort and fmish grading to verify conditions met specification. r,~enro,~Mar,~-May, ~, zoo3.aa Golder Associates Inc.