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Ms. Choucair worked in a variety of materials, including wood, aluminum, brass, terra cotta and tufa stone, with a pared-down elegance and sensuous touch that sometimes recalled Brancusi.

One of her most extended projects was the “Duals” series of the ’70s and ’80s, two-part interlocking forms in aluminum, brass, fiberglass, wood and other materials.

Outside, Chipperfield replaced the idiosyncratic limestone façade with black steel, aluminum, brass, and sleek glass.

Her employees strip away valuable commodities — steel, aluminum, brass and copper — and minute amounts of precious metals like gold, silver and iridium.

Still uncontracted for is the rest of the expansion program announced by OPM shortly after the Senate investigation: four plants aggregating 260,000,000 lb. capacity to be operated by Reynolds, Bohn Aluminum & Brass, Union Carbide & Carbon, Olin Corp.