The White Haven area will be the location of one of two new type combination service stations and restaurants which will be built on the northeast extension of the Pennsylvania Turnpike, the commission has revealed. One will be near Wescosville in the Lehigh Valley and the other on the Carbon-Luzerne county line. The pattern is new in that each is designed to serve motorists going north or south. The sites will be leased to gasoline companies for 25 years. they must build the stations and restaurants.