Erik, the PASDA lidar projection is PA State Plane [North or South, depending on where in PA your map is], units are feet. The tiles use a shorthand 4-digit notation for the NW corner of the tile. The actual geo coords are likely larger. Perhaps (340000N,2490000E), and those are in feet not meters. [edit: I pulled tile
34002490PAS.las and confirmed the NW coord here. Each tile is 10000x10000 feet. The DEM should be the same.]