The Contract Covers Cleaning Of The Boulevard Tunnel, Once A Year (In January/February). This Is Night And Weekend Work During Track Closures, Where The Tunnel And Intermediate Passages Must Be Cleaned. This Includes The Entire Drainage System In The Long-Distance Railway Section And The S-Bahn Section, In The Boulevard Tunnel, Which Must Be Flushed And Suctioned. This Includes The Drainage Channel Located In The Middle Of The Track, All Wells And Transverse Lines As Well As Sumps At The Pump Well Must Be Suctioned And Flushed For Sediment.
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