Diaz Chemical was a manufacturer of specialty organic intermediates for the agricultural, pharmaceutical, photographic, color and dye, and personal care products industries. The Diaz Chemical product line varied over the years of operation but primarily consisted of halogenated aromatic compounds and substituted benzotrifluorides. The Diaz Chemical facility has a long history of spills, releases and discharges of various materials to the environment that dates back to about 1975. The U.S. Environmental Protection Agency has finalized a plan to clean up contaminated soil and ground water at the Diaz Chemical Corporation Superfund site in Holley, New York. The soil and ground water are contaminated with volatile and semi-volatile organic compounds, which can cause serious damage to people’s health. The EPA’s cleanup plan uses a technology to treat six areas of soil and ground water that continue to cause contamination of ground water in a broader area.