You want to archive the data contained in the EH&S Classic tables (such as: ESTDU, ESTMJ, ESTRH, ESTRI, ESTVA, ESTVH...), but there is no standard archiving object available for this.
Archiving is not available for EH&S data. EH&S data can only be deleted from the database using the report RC1PHDEL.
You can find more details about report RC1PHDEL in IMG Activity:
-> Environment, Health and Safety
-> Basic Data and Tools
-> Specification Management
-> Specification Master
-> Set Up Job for Deleting Data
The data that can be archived are the EH&S Reports. For more information please read through chapter "Archiving of EH&S Documents with ADK" in the SAP library:
Creating an Archiving Object (Archiving Workbench): http://help.sap.com/saphelp_erp60_sp/helpdata/en/2e/3c003f662e781fe10000000a114084/content.htm
Data Archiving (CA-ARC): http://help.sap.com/erp2005_ehp_07/helpdata/en/9d/4d97535deced23e10000000a174cb4/frameset.htm
Archiving Change Documents (BC-SRV-ASF-CHD): http://help.sap.com/erp2005_ehp_07/helpdata/en/0e/3c4e7dc67c4970b504535632beec9f/content.htm