An alternative name assigned to a chemical by an EPA program office system and treated by EMCI as a synonym for that chemical substance. Duplicate names derived from different EPA systems are retained, identified by the distinct systems from which they were obtained. Multiple names may exist for the same SYS_CODE and SYS _CHEM_ID (e.g., synonyms from TRIS).
The source for these data is:
- PCS - PARAMETER_DESCRIPTION in Table ID 161.
- TRIS - DESCRIPTION in OTSS table, where TABLE_TYPE is TRCHEM.
- RCRIS - Description of hazardous waste codes in Register of Lists and others.
- AFS - DESCRIPTIONS in Geo-Common Parameter Table, POLLUTANT DESCRIPTION in Pollutant Table.
Functional Design for the Envirofacts Master Chemical Integrator, September 1994.
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