{"id":885338,"date":"2025-08-19T07:00:08","date_gmt":"2025-08-19T11:00:08","guid":{"rendered":"https:\/\/www.thecompliancecenter.com\/ca\/?p=885338"},"modified":"2025-12-01T01:49:33","modified_gmt":"2025-12-01T06:49:33","slug":"phmsa-proposes-removal-of-appendix-a","status":"publish","type":"post","link":"https:\/\/www.thecompliancecenter.com\/ca\/help-center\/articles\/phmsa-proposes-removal-of-appendix-a\/","title":{"rendered":"PHMSA Proposes Removal of Appendix A"},"content":{"rendered":"

\"\"<\/p>\n

PHMSA Proposes Removal of Appendix A<\/h2>\n

If you\u2019re familiar with the \u201cHazardous Materials Regulations\u201d in Title 49 of the Code of Regulations<\/em><\/a> (49 CFR), you\u2019ve probably come across the \u201cHazardous Materials Table<\/a>.\u201d This table lists all the descriptions of hazardous materials and provides information about how to ship them. The table is followed by two additional tables called Appendix A and Appendix B. They\u2019ve been used for decades to help determine if the material should be classified as a \u201chazardous substance\u201d to the environment (Appendix A) or a \u201cmarine pollutant\u201d (Appendix B). But time may be running out for Appendix A, as the Pipelines and Hazardous Materials Safety Administration (PHMSA) has decided the table is redundant and announced plans to eliminate it.<\/p>\n

What Is Appendix A?<\/h3>\n

Appendix A to section 172.101 (the Hazardous Materials Table) lists about 3,000 substances that are believed to pose a significant danger to the environment when released unintentionally. Each substance is assigned a \u201creportable quantity,\u201d or \u201cRQ.\u201d If the amount released equals or exceeds the RQ, the person in charge has specific <\/a>reporting requirements under the Comprehensive Environmental Response, Compensation, and Liability Act<\/em> (CERCLA<\/a>). This is part of the overall \u201cRight to Know\u201d system to protect American communities from dangerous substances.<\/p>\n

However, \u201chazardous substances\u201d weren\u2019t developed by PHMSA or earlier transportation agencies. Instead, they are taken from a list developed by the U.S. Environmental Protection Agency (EPA) in Title 40, Code of Federal Regulations<\/em> (40 CFR) section 302.4<\/a>. In this section, you\u2019ll find an identical list to Appendix A as created under CERCLA. This means that for consistency every time EPA updates the CERCLA list, 49 CFR would also have to create a rulemaking to match the changes.<\/p>\n

PHMSA Proposes to Eliminate Duplication<\/h3>\n

In a Notice of Proposed Rulemaking<\/a> (NPRM) issued on July 1, 2025, PHMSA has proposed that Appendix A should be completely eliminated. Note that it\u2019s not the intent to get rid of the \u201cenvironmentally hazardous substance\u201d classification. It\u2019s simply to avoid having two duplicate lists which could be updated by different agencies (PHMSA versus EPA) and create confusion if they aren\u2019t perfectly synchronized. Instead, 49 CFR will just include a reference to the EPA CERCLA list, which will be the definitive source on RQs.<\/p>\n

One area that some commentators have noticed is that the NPRM would move Appendix B, the list of marine pollutants, up to become the new Appendix A. This may create some confusion in references in regulations as well as in training procedures and standard operating procedures, so there is a suggestion that perhaps the final rulemaking could simply mark Appendix A as \u201credacted\u201d or have it contain the reference to 40 CFR 302.4, leaving the marine pollutants still as Appendix B.<\/p>\n

Conclusion<\/h3>\n

If you have comments about this rulemaking, PHMSA is accepting them until September 2, 2025. You can e-mail them, referencing the Docket Number PHMSA-2026-0093 (HM-268E), to the E-Gov website at www.regulations.gov<\/a>, send them by regular mail or fax them to 1-202-493-2251 or\u00a0send us an email,<\/a>\u00a0we\u2019re happy to help.<\/p>\n

The proposed changes shouldn\u2019t have a significant impact beyond making 49 CFR slightly slimmer, and avoiding confusion if the list of reportable quantities is updated by one agency not the other. However, if you foresee unexpected consequences, be sure to let PHMSA know by the deadline.<\/p>\n

Do you have questions about hazardous substances and reportable quantities? Need to keep track of upcoming changes that could affect your business? Contact ICC Compliance Center 1-888-442-9628 (U.S.) or 1-888-977-4834 (Canada) if you have questions regarding the regulations in general or need products to help you comply.<\/p>\n

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PHMSA Proposes Removal of Appendix A If you\u2019re familiar with the \u201cHazardous Materials Regulations\u201d in Title 49 of the Code…<\/p>\n","protected":false},"author":12546,"featured_media":885339,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[2369,2661,4008,5069,5073,5087],"tags":[2368,2398,2429,2574],"class_list":["post-885338","post","type-post","status-publish","format-standard","has-post-thumbnail","category-industry-news","category-49-cfr-regulation-updates","category-ground-road-and-rail-transport","category-ground-transportation","category-dot-49-cfr","category-limited-quantities","tag-49-cfr","tag-phmsa","tag-regulations","tag-hazardous-materials"],"acf":[],"yoast_head":"\nPHMSA Proposes Removal of Appendix A | ICC<\/title>\n<meta name=\"description\" content=\"PHMSA has proposed that Appendix A be eliminated to avoid having duplicate lists 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