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- vii - <br /> RCRA Code. The letter-and-digit code in the RCRA Code column is the chemical's RCRA <br /> hazardous waste code. <br /> Summary of Codes <br /> Reporting threshold has changed since November 1998. <br /> + Member of PAC category. <br /> # Member of diisocyanate category. <br /> X Indicates that this is a second name for a chemical already included on this consolidated list. <br /> May also indicate that the same chemical with the same CAS number appears on another <br /> Est with a different chemical name. <br /> * RCRA carbamate waste;statutory one-pound RQ applies until RQs are adjusted. <br /> ** This chemical was identified from a Premanufacture Review Notice (PMN)submitted to <br /> EPA. The submitter has claimed certain information on the submission to be confidential, <br /> including specific chemical identity. <br /> *** Indicates that no RQ is assigned to this generic or broad class, although the class is a <br /> CERCLA hazardous substance. See 50 Federal Register 13456 (April 4, 1985). Values in <br /> section 313 column represent Category Codes for reporting under Section 313. <br /> **** Releases in amounts less than 1,000 pounds per 24 hours of nitrogen oxide to the air which <br /> are the result of combustion and combustion related activities are exempt from the <br /> notification requirements of EPCRA section 304 and CERCLA. <br /> ***** Releases in amounts less than 1,000 pounds per 24 hours of nitrogen dioxide to the air which. <br /> are the result of combustion and combustion related activities are exempt from the <br /> notification requirements of EPCRA section 304 and CERCLA. <br /> c Although not listed by name and CAS number, this chemical is reportable under one or more <br /> of the EPCRA section 313 chemical categories. <br /> S Indicates that this chemical is currently under an administrative stay of the EPCRA section <br /> 313 reporting requirements, therefore,no Toxics Release Inventory reports are required <br /> until the stay is removed. <br /> ! Member of the dioxin and dioxin-like compounds category. <br />