# TDA, Inc — Hazardous Materials Safety Interpretation

**Citation:** 19-0031  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2019-06-11

19-0031 response to TDA, Inc concerning 171.8.

## Document text

<<<PAGE 1>>>

U.S. Department
of Transportation
Pipeline and Hazardous
Materials Safety
Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
JUN 1 1 2019
Tom Dunaway
TDA, Inc.
502 Big Creek Drive
Delta, AL 36258
Reference No. 19-0031
Dear Mr. Dunaway:
This letter is in response to your March 11, 2019, email requesting clarification of the Hazardous
Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to registration. Specifically,
you ask if a person is required to submit a hazardous materials registration and payment if they
offer for transportation or transport less than 55 pounds of a Division 1.1 , 1.2, or 1.3 (explosive)
material.
The answer is yes, unless it is an activity of a farmer, as defined in§ 171.8, that is in direct
support of farming operations (see§ 107.60l(b)). In accordance with§ 107.60l(a)(6), the
registration and fee requirements apply to any person who offers for transportation, or transports,
in foreign, interstate or intrastate commerce a quantity of hazardous material that requires
placarding, under provisions of subpart F of part 172. Subpart F of part 172 requires that any
quantity of a Division 1.1 , 1.2, or 1.3 (explosive) material be placarded; the registration fee
applies to both a person who offers for transportation or transports any quantity of a Division 1.1,
1.2, or 1.3 (explosive) material. Being below the threshold quantity in§ 107.601(a)(2) does not
exclude a person from possibly being subject to the condition of§ 107.60l(a)(6).
I hope this information is helpful. Please contact us if we can be of further assistance.
r eren
Chief, Standards Development
Standards and Rulemaking Division

<<<PAGE 2>>>

Dodd, Alice (PHMSA)
From: INFOCNTR (PHMSA)
Sent:
To:
Friday, March 15, 2019 4:39 PM
Hazmat Interps
Subject: FW: Interpretation request
Hello Alice and lkeya,
Please see the letter of interpretation request below. The specialist spoke with Mr. Dunaway and referenced the Federal
Register. However, Mr. Dunaway would like a written interpretation. Please contact our office with any questions.
Lynsie Patschke
Transportation Regulatory Specialist
Hazardous Materials Information Center (HMIC)
From: Tom Dunaway [mailto:tdadunaway@gmail.com]
Sent: Monday, March 11, 2019 3:32 PM
To: INFOCNTR (PHMSA) <INFOCNTR.INFOCNTR@dot.gov>
Subject: Interpretation request.
I am requesting an interpretation of 107.601. paragraph (a)(2) clearly states that persons must register if offering or
accepting quantities of 1.1, 1.2, or 1.3 class 1 materials if they are over 55 pounds. However in paragraphs (a)(5) and (6)
addresses placarded quantities of HM. If a person offers or accepts for transportation a quantity of less than 55 pounds
of 1.1, 1.2, or 1.3 as stated in Paragraph (a)(2) must that person register and pay a fee?
Thank You
Tom Dunaway
TDA, Inc.
502 Big Creek Drive
Delta, AL 36258
H 256-488-5580
F 256-488-5511
C 954-401-3500
tdadunaway@gmail.com
1

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/71656/190031.pdf>
- Source ID: `phmsa`
- SHA-256: `0df4de9e58a1f827c3f3eeec14792534777b66a456fb789fce77e3af5fef5409`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T07:49:08.496Z
- Document slug: `phmsa-interpretation-19-0031`

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