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failing Select Structural Fill test results and to remove the existing 18-inch CSP that ran along the same alignment. Ames began to reconstruct the Phase Na PU starting from the ADR building working North along the old ADR road. Ames excavated trench and placed geotextile, Underdrain Fill (UF), • and Select Structural Fill (SSF) for approximately 300 feet of PU. Ames resumed construction of the Phase IVa Secondary Underdrain (SU) by extending the previously constructed SU to the east by 40 . feet. Ames continued to remove Drain Cover Fill (DCF} from the edge of Phase I along the Phase I/Phase IVa tie-in in preparation for final grading. Ames continued placement of Concrete Plug (CP) concrete into "Deep Shaft" UG-456. Ames placed three feet of concrete in accordance with IFC Drawing 12, Detail 1. Ames continued placement of Cemented Rockfill (CR) into "Deep Shaft" at UG-456 by tapering the working and placing 7 feet of CR in accordance with IFC Drawing 12, Detail 1. Ames did not perform confirmation drilling in the Phase IVa azea during this reporting period. Phase IVb Ames continued Structural Fill (SF) placement and compaction activities in the eastern portion of the Phase Nb footprint at the temporary access road neaz the old highway crossing, near station 3+00 of the 9640 access road, and west of the new LOB. Structural Fill materials were placed in horizontal lifts typically not exceeding 2 feet in loose thickness. A Caterpillaz CS563C roller provided compactive effort, while a Caterpillaz water wagon provided moisture conditioning when needed. Ames conducted • slope recontouring activities at the West end of the temporary diversion channel and in the PSSA sump area. Ames resumed SF blast drilling in the Phase IVb at "Chicken Hawk Hill" and blasted on March 26a' and 27a'. Ames continued to remove Drain Cover Fill (DCF) from the edge of Phase III along the Phase IIUPhase IVb tie-in in prepazation for local grading. Ames did not perform confirmation drilling in the Phase Nb area during this reporting period. Ames performed excavation remediation activities of known underground working UG-306. This working was observed and verified to be a "Shallow Shaft" as defined in the drawings and will be remediated accordingly. Ames continued placement of Concrete Plug (CP) concrete into "Deep Shafts" UG-316, UG-317, UG- 478, UG-483, and UG-494. Ames placed three feet of concrete in accordance with IFC Drawing 12, Detail 1. Ames continued placement of Cemented Rockfill (CR) at UG-265, UG-548, UG-483, UG-316, UG- 317, UG-478, and UG-494 by tapering the working and placing 7 feet of CR in accordance with IFC PheselVe SO Marthl4Aprilb.doc Golder Associates lnc.