# URS Corporation — Hazardous Materials Safety Interpretation **Citation:** 14-0016 **Type / status:** guidance / guidance **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2014-03-04 14-0016 response to URS Corporation concerning 172.800. ## Document text <<>> U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Avenue, SE Washington, D.C. 20590 MAR 0 4 2014 Mr. Andrew N. Romach URS Corportation 1600 Perimeter Drive Morrisville, NC 27560 RefNo.: 14-0016 Dear Mr. Romach: This is a response to your January 1 7, 2014 email requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) with regard to the applicability of security plans in§ 172.800. Specifically, you ask whether subsidiary hazards should be considered when determining the applicability of the security plan requirements for shippers and carriers. In your email, you describe a shipment of a large bulk quantity of "UN2920, Corrosive liquid, flammable, n.o.s.," with a primary hazard of Class 8, packing group II and a subsidiary hazard of Class 3, packing group III. In accordance with§ 172.800(b), each person who offers for transportation or transports a hazardous material in a quantity indicated in paragraphs (b )(1) through (b)( 16) must develop and adhere to a security plan. In § 172.800(b ), a "large bulk quantity" refers to a quantity greater than 3,000 kg (6,614 pounds) for solids or 3,000 liters (792 gallons) for liquids and gases in a single packaging. In regards to a large bulk quantity of"UN2920, Corrosive liquid, flammable, n.o.s., 8, 3, II," with a primary hazard of Class 8, packing group II and a subsidiary hazard of Class 3, packing group III, a security plan would not be required, as there are no corresponding applicability in § 172.800(b) for this material. Unless specified in paragraph (b) of this section, the applicability for security plans refers to the primary hazard of a material or the definition of a hazard class. I hope this information is helpful. If you have any more questions, please do not hesitate to contact this office. Sincerely, Robert Benedict Chief, Standards Development Standards and Rulemaking Division <<>> January 17,2014 Su~hak ~ 112. sao (b)(~J ~ec.u.n'tj 'Plans. lti--b()/(o Mr. Charles Betts, Division Director Standards and Rulemaking (PHH-10) U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration East Building, 2nd Floor 1200 New Jersey Ave., SE Washington, DC 20590 Dear Mr. Betts: I am writing to request a Department of Transportation (DOT) interpretation concerning the applicability of a DOT Security Plan in 49 CFR 172.800(b )( 6). Question: Would shipping a large bulk quantity of UN2920, Corrosive liquid, flammable, n.o.s. with a primary corrosive hazard (8, II) and subsidiary flammable hazard (3, III), which is assigned overall classification of 8(3), II when using the precedence of hazard table in 49 CFR 173.2a(b), be required to have a DOT Security Plan? The :flashpoint of this material is 120°F. Even though the overall packing group of the hazardous material is PGII due to the Class 8 hazard, the Class 3 hazard is actually PGIII. Based on verbal guidance provided by Neil Suchak in DOT Standards Development, he stated that the applicability of the Security Plan is based on the Primary Hazard Class of the hazardous material and only considers the Subsidiary Risk for those materials in 49 CFR 172.800(b )( 4) and (b)(14). Please confirm that in determining DOT Security Plan applicability for the 8(3), II scenario described above, a DOT Security Plan would not be required. I would appreciate your assistance with this question. Sincerely, Andrew N. Romach Regulatory Compliance Manager URS Corporation URS Corporation 1600 Perimeter Park Drive Morrisville, NC 27560 Tel: 919.461.1220 Fax: 919.461.1371 andy.romach@urs.com ## Provenance - Official: Yes - Source: - Source ID: `phmsa` - SHA-256: `aa2e7731f5e1499ea8e1755b61384dabe487201ed0b18652159e8a8d4ac087e7` - Retrieved: 2026-08-20T00:59:31.977Z - Exported: 2026-08-23T03:26:26.168Z - Document slug: `phmsa-interpretation-14-0016` ### Source metadata ```json { "materialSubtype": "interpretation", "interpretationArea": "hazardous_materials", "representation": "full_text_from_official_pdf", "companies": [ "URS Corporation" ], "individuals": [ "Mr. Andrew N. 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