Sewerage Plan 1915 Published January 1, 2014 at 700 × 476 in Quarantine the Fourth Phase 1900 to 1925 Sewerage Plan, 1915 Detail from Quarantine Station Nepean, Sewerage Plan – Dining Room, Hospitals 1 & 2, Caretaker’s Quarters, dated 22 November 1915. Source: National Archives of Australia.