However, as the program has expanded, some of the variables have changed over the years. These identifiers allow linkage with other databases. The TRI program issues guidance to assist facilities in reporting their data. This reduces reporting errors before they are made. In addition, EPA runs computer checks against the reported data where potential errors are identified, and facilities are notified to allow for correction.
Audits reveal a very low rate of data transcription errors as well.
These surveys concentrated on certain particular SIC codes. The surveyors examined the estimation calculations and data sources and then recalculated the release and waste management estimates. They did not conduct any monitoring or measurements during the site visit. Link to Detailed Answer TRI is an expanding program and since its inception has increased the coverage of the reporting universe and reported chemicals. As a result, depending on the particular spatial or temporal analysis, some caution is advised in using TRI data exclusively.