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Entity Type : CHEM_SUBST
Entity Type Description:
The Chemical Substance (CHEM_SUBST) entity type contains data identifying chemical substances that are regulated or monitored by EPA systems. Each substance is unique and is either a specific chemical, category, non-specific isomer or mixture. The entity type also includes references to biological, physical, and toxicological properties that are monitored by the Permit Compliance System (PCS).
Relationships:
Contains one record for each chemical referenced in EMCI using EMCIRN as the unique key. A chemical substance in CHEM_SUBST may refer to:
- Multiple records in SYS_CHEM, retrievable by EMCIRN.
- Multiple records in SUBST_REL identified as GROUP_EMCIRN.
- Multiple records in SUBST_REL identified as COMPONENT_EMCIRN.
Subject Area: Chemicals
Entity Type Definition Source:
Functional Design for the Envirofacts Master Chemical Integrator, September 1994.
Entity Type Attributes:
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