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Phase IV Week]y Summary No. 27 Page 2 003-2203 Slope recontouring in the Phase Na area included blasting east of the existing HWY 67, at Permanent Diversion Channel stations 34+00 through 40+00 on August 6e' through 8u', 10`s, and lla'. Ames continued clearing and grubbing in the Phase Na area at the Bateman Creek Pond construction azea. Ames removed all available topsoil and placed it in Visual Barrier topsoil stockpile. Phase IVb Ames continued placement and compaction efforts of SF, west of the active crusher, for the new LOB construction. Ames placed SF in approximately 2-foot lifts, removed oversized and deleterious material (roots), moisture conditioned, and compacted the fill that was borrowed from the Phase IVa slope excavation and Phase Nb local borrow. Compaction was attained by use of a smooth drum vibratory compactor. ~ ~ No confirmation drilling or underground working remediation occurred within the Phase IVb azea during this reporting period. PhaseIVc Ames began slope recontouring within the Phase IVc azea by removing cut material and placing it in the Phase IVb fill. Ames conducted confirmation drilling at UG-236, UG-244, and UG-246b. Ames confirmed an underground working located at UG-244 and conducted blast drilling and blasting on August 9a'. (See Attachment A for approximate construction locations for all Phase IV azeas.) Field Monitoring and Testing Activities Golder observed clearing and grubbing activities in Upper Arequa Gulch (Phase IVa). Clearing and grubbing activities were conducted within the clearing limits. Golder monitored SF placement in the Phase N area including, verification of lift thickness, material, compactive effort, particle size, and temperature for compliance with the drawings and method specifications. No moisture/density tests were performed on SF during this reporting period, as material was un-testable per ASTM D698, based on laboratory testing and visual determination. Golder observed the removal of oversized and deleterious material from the fill. Golder observed confirmation drilling and underground working excavation in Phase IVc (full time). Golder observed confirmation drilling at UG-236, UG-244, and UG-246b and blasting at UG-244. Laboratory Test Results Golder did not conduct any laboratory testing during this reporting period. PM1aze rVa 2] AugS-I I doc Golder Associates Inc.