EVANS CITY, Pa. — Marburger Farm Dairy is not just an outlet for the milk production from the Marburger family’s dairy cattle, but a market for farmers’ milk from several counties in western Pennsylvania. Almost immediately after he opened the dairy plant, local farmers started hauling their milk into the Marburger Farm Dairy. Marburger said the dairy starts each day with 15,000 gallons of skim milk, then, as the processing moves along, more fat is added in order to produce the whole, 2 or 1 percent milk.