Specifications include, but are not limited to: The aluminum sheets supplied through this contract shall: be ASTM B 209, 5052-H38; be chemically treated in accordance with ASTM B 449 Class II or equivalent; be thoroughly clean, free of grease, oil, dirt, paint, moisture, stains or other foreign matter; be free of dents, bow, warp, buckle or defect; be mill produced stable flat sheet; be tension leveled; be flat and in a true plane; remain flat, free from bow, buckle, warp or dimpling after shearing and/or sanding, and be supplied without thickness of alloy imprints. Commercial tolerances as established by the Aluminum Association in the Aluminum Standards and Data shall apply and further govern the acceptability of submitted products.