Why was Dalgard reluctant to let the Army into his facility?

Dan Dalgard has never heard of the Ebola virus and is hesitant to give Colonel Peters full access to the facility until he can meet him in person. He knows that the army will kill all the monkeys. Given his guilt after killing the healthy monkeys in Room F, it is possible that Dalgard is trying to keep as many healthy monkeys alive as possible until the virus can be contained.