The data published with NAICS code 212399 include the following SIC industry:
1499 Miscellaneous nonmetallic minerals, except fuels (pt)
This definition comes from the 1997 NAICS manual. However, for this industry, the 1997 Economic Census Mining did not fully implement the conversion to NAICS. Data for NAICS industry 212399 do not include establishments only engaged in beneficiating or preparing miscellaneous nonmetallic minerals. The NAICS definitions will be fully implemented with the 2002 Economic Census.
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