KATHMANDU, Sept 25: Four mobile food testing vans which the government brought for 240 million rupees four years ago have been recklessly left to rot on the premises of a government office. The government had bought four mobile vans worth Rs 60 million each . Each of these vans is equipped with laboratories to test the quality of food products after the increase in the supply of substandard food items in recent times, affecting human health in the market.