# The Dow Chemical Company — Hazardous Materials Safety Interpretation

**Citation:** 98-0513  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1998-01-06

98-0513 response to The Dow Chemical Company concerning 172.3, 172.512.

## Document text

<<<PAGE 1>>>

•
/
ATG SYMBOL
INITULSISO
IAN 56X
ATG STUBOT
Mr. Hugh Taylor
The Dow Chemical Company
Regulatory Specialist
RTG SYNBOL
Midland, MI 48674
Dear Mr. Taylor:
DATE
This is in response to your letter dated November 5, 1997, regarding residues of Class 9
ATG SYMBOL
hazardous substances under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-
180). Specifically, you ask whether tank cars and cargo tanks that contain residues of Class 9
INITULSISIO
hazardous substances may be returned from the consignee without removing the ID number
DATE
marking and/or the placards.
ATG SYMBOL
The answer is yes. The HMR do not require removal of the identification markings and/or
PITULSISIG
placards when a package has a residue of a Class 9 hazardous substance. However, the
shipping paper should be consistent with the transport vehicle's hazard communications by
DATE
prefacing the shipping description with "RESIDUE Last Contained ***" as provided by
§ 172.203(e)(1). However, markings or placards may be removed when the Class 9
ATG SYUBOL
hazardous substance residue is below its reportable quantity. No shipping paper is nécessary
*X*x
if placards and markings are removed.
ANTULSISO
DATE
I hope this information is helpful. If we can be of further assistance, please do not hesitate to
contact us.
ATO SYMBOL
Sincerely,
MITMSISO
15/
D1573x
ATO SYMBOI
Delmer F. Billings
Chief, Regulations Development
BITALSO
Office of Hazardous Materials Standards
%
13-23
George:DHM-11:68553:12/19/97:at
File: 172.303 172.512(3)(c)
SC: 230, 355
177.203
98-0513
Form DOT F 13208S (Ror. 5183)
OFFICIAL FILE COPY

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/1998/980513.pdf>
- Source ID: `phmsa`
- SHA-256: `8f2123edb05c043f5deda92376445258ba80674bf07cbb232a02904fd54c1eb6`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T06:00:49.961Z
- Document slug: `phmsa-interpretation-98-0513`

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