How big is too big for oil and gas operations in Colorado's urban areas?

The effort to create new rules for large oil and gas facilities in urban areas — one of the major recommendations to come out of Gov. John Hickenlooper’s oil and gas task force in February — started Tuesday with a meeting between state officials and industry representatives, and several big questions. What is a large oil and gas facility? How many wells does it have? How many storage tanks? Or is a large facility one that has a lot of truck traffic in and out, carrying water in and oil or…