Description Technical Support

EPA is reviewing the database incorporated in the STF software package to determine the accuracy of the data contained therein. Upon completion of the review, a decision will be made as to whether or not the database will be once again made available on this Internet site. In the meantime, users of the database are advised that, while the information in the database is believed to be reliable, neither EPA nor any of its contractors make any further claim to the accuracy of the data and are not responsible for any use made of the data nor any consequences arising from such use.

Description  Back to Top

STF is a computer-based tool for selecting data on chemicals in the environment and for simulating their fate and transport in site-specific conditions. The software consists of three components:

1. STF 2.0 (Soil Transport and Fate Database), which provides information on the behavior of chemicals in soil environments for use as input data on, for example, degradation rates and partition coefficients.
2. RITZ (Regulatory and Investigative Treatment Zone) and VIP 3.0 models. RITZ simulates hazardous chemical movement and fate during land treatment of oily wastes. VIP evaluates data using six different output options.
3. RITZ and VIP model editors, which are directly interfaced with STF 2.0 and aid in the creation of input files for the RITZ and VIP models.

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