GAS INJECTION METHOD

CARBORUNDUM COMPANY, THE

from STEMCOR CORPORATION

CHANGE OF NAME EFFECTIVE ON 04/12/1988 Recorded 1992-12-31

KENNECOTT MINING CORPORATION

from KENNECOTT CORPORATION

CHANGE OF NAME EFFECTIVE DEC. 31, 1986. (SEE DOCUMENT FOR DETAILS) Recorded 1987-06-25

STEMCOR CORPORATION, 200 PUBLIC SQUARE, CLEVELAND, OHIO 44114 A DE. CORP.

from KENNECOTT MINING CORPORATION

ASSIGNMENT OF ASSIGNORS INTEREST. Recorded 1987-06-25

KENNECOTT CORPORATION

from BEAR CREEK MINING COMPANY, BEAR TOOTH MINING COMPANY, CARBORUNDUM COMPANY THE, CHASE BRASS & COPPER CO. INCORPORATED, KENNECOTT EXPLORATION, INC., KENNECOTT REFINING CORPORATION, KENNECOTT SALES CORPORATION, OZARK LEAD COMPANY, PLAMBEAU MINING CORPORATION, RIDGE MINING CORPORATION (ALL MERGED INTO)

MERGER EFFECTIVE DEC. 31, 1980 NEW YORK Recorded 1981-07-01