Williams Transco Central Penn Line South. Williams Transco Central Penn Line South. Unlike liquid petroleum product pipelines, where the main risk is a leak leading to contamination of water and soil, the main risk with a high-pressure natural gas pipeline is a rupture and ensuing fire.
The White House today holds 142 rooms on six floors, the floor space totaling approximately 55,000 square feet. It has hosted longstanding traditions such as the annual Easter Egg Roll, as well as historic events like the 1987 nuclear arms treaty with Russia.
But the Trevi district isn't just about a fountain. It encompasses the Palazzo del Quirinale, one of three official residences of the President of the Repubblic. Set on the highest of the seven hills on which Rome was built, it's a massive building (110,500 square metres), the ninth largest palace in the world.To give a sense of its gigantic size, the White House in the USA is one-twentieth of its size.