# National Tank Truck Carriers, Inc. — Hazardous Materials Safety Interpretation

**Citation:** 00-0350  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2001-02-01

00-0350 response to National Tank Truck Carriers, Inc. concerning 172.101, 172.202.

## Document text

<<<PAGE 1>>>

of Transportation
U.S. Department
0 Seventh Street. S
ishington, D.C. 205
Special Programs
Research and
Administration
FEB - 1 2001
Mr. John L. Conley
Ref. No. 00-0350
National Tank Truck
2200 Mill Road
Carriers, Inc.
Alexandria, VA
22314
Dear Mr. Conley:
the applicability of the Hazardous Materials Regulations (HMR; 49
This is in response to your November 28, 2000, letter regarding
parts 171-180) to fuel oil No. 6 with a flash point above
material that has a flash point above 60.5°C (141°F) and below
Under § 173.120 (b) (1), a combustible liquid is defined as a
93°C (200°F) that does not meet the definition of any other
hazard class under the HMR.
Therefore, fuel oil No. 6 with a
flash point greater than 93°C (200°F), that does not meet any
other hazard class defining criteria in Part 173, and is not a
hazardous waste, hazardous substance, or marine pollutant, is not
subject to the HMR.
I hope this satisfies your request.
Sincerely,
Transportation Regulations Specialists
Office of Hazardous Materials Standards
...
000350

<<<PAGE 2>>>

NATIONAL TANK
NTTC NATIONAL TANK TRUCK CARRIERS, INC.
TRUCK CAPRIERS
THE
NATIONAL
ORGANIZATION SERVING THE FOR-HIRE
TANK
USTRY
CLIFFORD J. HARVISON
PRESIDENT
2200 MILL ROAD • ALEXANDRIA, VA 22314-4677
PHONE: 703/838-1960 • FAX: 703/684-5753
November 28, 2000
Gate BAH
Mr. Edward Mazzullo
$172.101
Office of Hazardous Materials Standards
$172.202
Research and Special Programs Administration
400 7* St. SW
U.S. Department of Transportation
placarding/
Washington D.C. 20590
Shippingtapers
Dear Mr. Mazzullo:
Applicability
00-0350
relative to "fuel oil, (No. 6)." Do the Hazardous Materials Regulations, such
We would appreciate an interpretation of the Hazardous Materials Regulations
s placarding and requirements for shipping papers, apply to a tank truck loa
f fuel oil #6 that has a flash point over 200 degrees Fahrenheit? In othe
words, is a bulk load of fuel oil #6 with a flash point over 200 degrees
Fahrenheit a hazardous material?
We understand that a specification cargo tank would not be required, but
questions have arisen concerning other parts of the regulations-specifically
placarding and shipping papers..
Thank you for an early consideration of this question.
Sincerely,
John L. Conley
Vice President

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2000/000350.pdf>
- Source ID: `phmsa`
- SHA-256: `1a04145618ed14ede99fcbbdda1133ef5752745e7283388b75890f7cdbccafd8`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T19:47:18.232Z
- Document slug: `phmsa-interpretation-00-0350`

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