Giant Cement Holding, Inc., through its subsidiaries, Keystone Cement Company (Keystone) in Pennsylvania and Giant Cement Company (Giant) in South Carolina, manufactures and sells a complete line of portland and masonry cements used in residential, commercial and infrastructure construction applications. The Company's two cement manufacturing facilities are fully integrated, from limestone mining through cement production, and serve the growing South-Atlantic and Middle-Atlantic regions of the United States. Its subsidiary, Giant Resource Recovery, is a pioneer in the development of innovative, environmentally sound methods for the reuse of waste materials in the manufacturing of cement. Today, Giant Cement Holding is one of the largest users of waste-derived fuels in the cement industry. (Source: 10-K)