19 February Summary: Updating on the activities completed (Done) since the last meeting List activities on going (Next steps) and related Actions CENF – Civil Engineering Extension B887 Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February (5 th week) Concrete blocks removal, cores for water and electrical connections inside EHN1 completion (4 th week) “Visite d’Inspection Commune” (VIC), for the earthworks and worksite installation, Permit to dig issued by CERN to the contractor. Earthworks contractor on site Done (1/4): Site work side CENF – Civil Engineering Extension B887 Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February (5 th week) Ground surveys to determine its profile (top soil thick, water table depth..). Septic tank survey and site entrance area arrangement (5 th week) Existing networks research. Valve installation by SIG on the potable water network. Done (2/4): Site work side CENF – Civil Engineering Extension B887 Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February (6 th week) All week snow. Site Activities stopped due to the weather conditions Done (3/4): Site work side (7 th week) Snow removal, start top soil excavation (about 50cm), platform for site barracks creation. CENF – Civil Engineering Extension B887 Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February (7 th week) Existing drainage network research, concrete manhole installation, trench for service connection and top soil excavation completion (Transport toward storage area completed this week) Done (4/4): Site work side CENF – Civil Engineering Extension B887 Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February Done (1/1): Design and study side (issued 05/02) Final comments on the execution docs (issued 05/02) sent by CERN to the consultant. Awaiting for the updated version before the EDMS uploading. (issued 12/02) RP issue, additional soil thickness needed above the tunnels. Structural evaluation due to the overload and reference plan with new requirements provided to the Contractor (issued 12/02) (completed 16/02) “Etat des lieux” on the existing facilities (i.e. EHN1, underground tunnels TT84- TT85-TDC85, Roads and Storage Area). (completed 16/02).. Weekly site meeting + Coordination and Neutrino General meeting CENF – Civil Engineering Extension B887 Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

Next Steps (on going and awaiting submission) Analyse Plan and Execution Method about the existing facilities instrumentation (i.e. topographic and cracks monitoring, vibration measure and inclinometers) and TG portion in front the TDC85 enlargement (on going and awaiting submission) (on going) Analyse Plan and Calculation Notes received for the Diaphragm Walls and Sheet Piles execution (on going) (foreseen 8 th  11 th week) (foreseen 8 th  11 th week) Topsoil excavation removal General Site installation and access road completion Mass earthworks until the DW level upper part Site installation for the Special works contractor (DW +SP) Guide walls construction for DW excavation purpose Start DW excavation (drilling west side) CENF – Civil Engineering Extension B February

Overloads on the horizontal elements (1/2): CENF – Civil Engineering Extension B887 Extension Pits, levels -7.35m; -9.00m 300 KN/m 2 Technical gallery, level -3.45m PIT A PIT B GHN m -3.45m 19 February KN/m 2 Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

CENF – Civil Engineering Extension B February Extension of Building th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi Pannels for Diaphragm walls execution: Numerations in plan: Panel Type: N°47 must be modified for technical needs: (execution method, watertightness)