Environmental Protection Agency September 11, 2006 – Federal Register Recent Federal Regulation Documents

This document announces the 2006 reporting period for Inventory Update Reporting (IUR) under the Toxic Substances Control Act (TSCA). The IUR rule requires manufacturers and importers of certain chemical substances included on the TSCA Chemical Substances Inventory to report current data on the manufacturing, processing, and use of the substances. The 2006 reporting period is from August 25, 2006 to December 23, 2006. This is the first reporting period since the original inventory in which manufacturers and importers of inorganic chemical substances as well as manufacturers and importers of organic chemical substances are required to report. Also, the 2006 reporting period is the first to require reporting of processing and use information for certain chemical substances manufactured in volumes of 300,000 pounds or more at a site in addition to manufacturing information. While information can continue to be submitted through the mail or other delivery service, the Agency strongly encourages reporting through the Internet using EPA's Central Data Exchange (CDX).

The Environmental Protection Agency (EPA) is proposing to adjust the reportable quantity (RQ) for Isophorone Diisocyanate (IPDI). Reportable quantities for many of the Extremely Hazardous Substances (EHSs) under the Emergency Planning and Community Right-to-Know Act (EPCRA) were adjusted to their threshold planning quantities (TPQ) in a final rule on May 7, 1996. On September 8, 2003, EPA modified the TPQ for IPDI to 500 pounds. However, EPA inadvertantly omitted an RQ adjustment for this substance. Therefore, EPA is now proposing to adjust the RQ for IPDI to be 500 pounds. In the ``Rules and Regulations'' section of the Federal Register, we are revising the RQ for Isophorone Diisocyanate to 500 pounds without prior proposal because we view the revision as noncontroversial and anticipate no adverse comment. We have explained our reasons for this approach in the preamble to the direct final rule. If we receive adverse comment on this revision, however, we will withdraw this direct final action and it will not take effect. We will address all public comments in a subsequent final rule based on this proposed rule. We will not institute a second comment period on this action. Any parties interested in commenting on any amendment must do so at this time.