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Phase IV Weekly Summary No. 35 Page 2 003-2203 The material was then hauled to the Arequa Gulch fill azea. SF materials were placed in the fill azeas in horizontal lifts typically not exceeding 1 foot in loose thickness. A Caterpillar C5563C roller provided compactive effort, while a Caterpillaz water wagon provided moisture conditioning when needed or required. Ames continued and completed construction of a small extension of the secondary underdrain, east of the previously constructed underdrain, to facilitate SF construction upslope. Several laborers completed clean out of the excavated trench, lapped the existing geotextile azound the underdrain fill (UF), and spread Select Structural Fill (SSF) above the underdrain. A Caterpillar 9661oader placed the OF and SSF materials prior to manipulation by the laborers. Ames continued SF placement and compaction activities in the northern portion of the Phase IVa footprint, in the Arequa gulch azea. Caterpillar 777 haul trucks brought SF material from the cut area (mentioned above), while a Caterpillaz D8 placed and spread the material into loose lifts not exceeding 2 feet in thickness. Oversize material within the fill was removed by the dozer and placed in the uncontrolled fill azea located northeast of the fill. A Caterpillar CS563C roller provided compactive effort, while a Caterpillaz water wagon provided moisture conditioning when needed or required. Ames performed blast-drilling activities on Monday through Friday during this reporting period, in the central portion of the Phase IVa area. Blasting occurred Monday, Tuesday, Thursday, and Friday during this reporting period. Phase IVb Ames continued and completed placement of Compacted Ore Fill (COF) within the limits of the LOB construction area. The material was brought in by Caterpillar 777 haul trucks, spread by Caterpillaz D7 and D8 dozers into loose lifts approximately 1 foot in thickness, and compacted by a Caterpillaz CS563 roller (Minimum of 8 passes). A Caterpillaz water wagon provided moisture conditioning of the material when needed. Ames did not perform any drilling activities associated with the Phase IVb construction azea. Phase IVc Ames did not perform any drilling activities associated with the Phase IVc construction area. 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 N areas.) rwe rv.~s s~uaona.~~ Golder Associates lnc.