ABSTRACT
Extensive data show release of n-heptane into the environment from printing pastes, paints, varnishes, adhesives and other coatings; landfills and waste incinerators; vulcanization and extrusion operations during rubber and synthetic production; and the combustion of gasoline fueled engines. The bioconcentration of n-heptane may be important in aquatic environments. The Henry's Law constant suggests rapid volatilization of n-heptane from environmental waters. Based upon the water solubility, and log Kow, the bioconcentration factor (log BCF) for n-heptane has been calculated to be 2.53 and 3.31, respectively, from recommended regression-derived equations. These BCF values indicate bioconcentration may be important. n-Heptane was detected in the soil surrounding an earthen disposal pit for produced water in the Duncan Oil Field, NM. The most probable route of human exposure to n-heptane is by inhalation. n-Heptane is a highly volatile compound and monitoring data indicates that it is a widely occurring atmospheric pollutant.
