Five hundred workers at the Wells Dairy plant in LeMars remain on thepayroll, but don’t have any work to do today after an explosion at the plantthis weekend. Company officials are still trying to find the cause of theexplosion.A Wells spokesman says a hazourdous materials team has inspected the plantand they are trying to determine how much of the plant should remainedclosed. The explosion happened Saturday afternoon after employees smelledammonia. Part of the town around the plant was evacuated after the explosion.One worker was injured. Company officials say workers will remain on thepayroll while they try to re-open the plant.