DALLAS Federal claims could top one (B) billion against Asarco for environmental damage at 31 sites operated by the bankrupt mining and smelting company. The Justice Department met yesterday's deadline for submitting claims to an administrator appointed by a bankruptcy judge in Corpus Christi. States are seeking additional cleanup money, such as 600 (M) million dollars sought by Washington state. The company also faces asbestos-exposure claims from individuals, who have until September 30th to file. A lawyer for Asarco says the claims won't prevent the Arizona-based subsidiary of Grupo Mexico from eventually emerging from bankruptcy. Asarco has or has had facilities in Texas, including smelters in Amarillo and El Paso and a recycling center in Corpus Christi.