Subcommittee No. 3 hearings on S. 754 : to authorize the disposal of silicon carbide from the national stockpile and the supplemental stockpile; S. 764, to authorize the disposal of lead from the national stockpile and the supplemental stockpile; S. 3086, to authorize the disposal of nickel from the national stockpile; and S. 773, to authorize the disposal of metallurgical grade chromite from the national stockpile and the supplemental stockpile /