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Phase IV Weekly Summary No. 33 Page 2 003-2203 squaze feet (total) of 80-mil textured LLDPE in the LOB area. • Ames began placement of Drain Cover Fill (DCF) on September 20a' down the ramp on the East side of the LOB area. Drain Cover fill was hauled to the LOB area using CAT 777 haul trucks and placed with a CAT D6M. No confirmation drilling was performed in this area during this reporting period. Phase IVc Ames began confirmation drilling at UG-242. No workings were located. Ames did not perform any cut or fill activities within the Phase IVc azeas during this reporting period. (See Attachment A for approximate construction locations for all Phase IV azeas.) 1 Field Monitorin¢ and Testin¢ Activities Golder observed construction activities associated with Phase IV earthworks. All construction materials and soil materials were verified as suitable and construction methods were in accordance with project specifications. Removal of oversized and deleterious material from all fill azeas was observed. Golder observed and recorded confirmation drilling and remediation of underground workings in the all Phase IV azea during this reporting period. Confirmation drilling was observed full time. Golder monitored and documented geomembrane installation. Golder observed panel deployment, including panel thickness measurements and mazking defects. Golder monitored and documented trial seam tests, seaming, seam pressure tests, vacuum testing, patching, and identified fusion seam destructive samples and extrusion seam destructive sample for testing by Polyflex. Golder provided full time observation of DCF placement to verify that the material was placed a minimum of two feet thick, geomembrane wrinkles were not folded, oversized and deleterious materials were not present in the fill, and HVSC pipes were kept in place and haunched as needed. Laboratory Test Results No laboratory testing was completed during this reporting period. Meetings CC&V held a Weekly Contractor meeting on September 18°i. Items discussed include Safety, Environmental, Schedule, and CQA. The next weekly meeting will be held on September 25a', 2001 at 10:00 AM. PhmeIVe 3J SeglbSept23.doc Golder Associates Inc.