Manual for GCSOLAR program, which contains a set of routines that compute direct photolysis rates and half-lives of pollutants in the aquatic environment.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
GCSolar User Manual (PDF)(43 pp, 2 MB,
The GCSolar computer application contains a set of routines that computes direct photolysis rate constants and half-lives of chemical and biological contaminants in the aquatic environment. The half-lives are calculated as a function of season, latitude, time-of-day, depth in water bodies, and atmospheric ozone layer thickness.