In bidding for the Rs 8,000-crore fourth container terminal at Jawaharlal Nehru Port Trust, the Essar Ports has failed to qualify as it fell short of the value of work done in the past to meet the criteria. Sources said that Essar Ports has not been qualified for the terminal project as per the Central Vigilance Commission set guidelines.    Media reports say that apart from Essar Ports, the other seven contenders in the fray have qualified to bid for the much sought after project, which has been embroiled in delays and cost escalation. Adani Ports, Dubai Port World, APM Terminals, Port of Singapore Authority, Sterlite Ports, United Liner Agencies and International Container Terminal Services have qualified to bid for the terminal.    Sources at JNPT said that the minimum qualifying criteria for the amount of work done in the past was revised to about Rs 12,000 crore by JNPT on July 16 from about Rs 4,000 crore earlier. However, the submission made by Essar Ports on August 18, had it at Rs 5,600 crore, thus failing to meet this minimum standard.