Superfund Site: CRYSTAL CHEMICAL CO.
Superfund Site Profile
Five-Year Review Report September 2000
The 6.8-acre Crystal Chemical Co. site is located in southwest Houston, Texas. Between 1979 and 1981, Crystal Chemical manufactured arsenic-, phenolic- and amine-based herbicides on site. Outdoor storage of raw and finished herbicide products and poor containment of arsenic during loading and unloading operations resulted in arsenic leaks and spills. Although the site is not in a flood-prone area, it is located in the 100-year floodplain. In 1976, the area was subject to repeated flooding, which carried arsenic-contaminated wastewaters off site. These activities and events contaminated soil and groundwater with arsenic. Following cleanup, operation and maintenance activities are ongoing.