Port Blair, Mar 22: The President of Bharatiya Janta Party Mr. R Mohan today requested the Lt. Governor to purchase two more septic tank cleaning vans for Port Blair city. In a letter addressed to the Lt. Governor, Mr. Mohan today said that due to non availability of sufficient number of septic tank cleaner vans with the Port Blair Municipal Council, the septic tanks of various places in an around Port Blair have started over flowing, creating problems for people living around those septic tanks.