# Alcoa KAMA — Hazardous Materials Safety Interpretation

**Citation:** 07-0067R  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2007-09-06

07-0067R response to Alcoa KAMA concerning 173.306.

## Document text

<<<PAGE 1>>>

Transportatic
.S. Departmer
1200 New Jersey Avenue, SE
SEP
5 2007
Washington, D.C. 20590
Alcoa KAMA
Mr. Chris Meeks
Ref. No. 07-0067R
1050 Sycamore Rd.
Manteno, II 60950
Mr. Meeks:
This is in further response to our July 28, 2007 reply to your March 30, 2007 letter concerning
limited quantity shipments of compressed gases transported by highway. A further review of
this issue indicates a need to clarify our previous response.
Your letter stated that § 173.306 of the Hazardous Materials Regulations (HMR; 49 CFR Parts
171-180) provides labeling and packaging exceptions for compressed gases only when offered
as a limited quantity not exceeding a gross weight of 30 kg (66 pounds). Your letter also stated
that a 55-gallon steel drum (1A2) used as an outer packaging to contain aerosols and having a
applicable labeling and packaging requirements are maintained. You asked whether your
gross weight over 30 kg (66 pounds) may be offered and transported by highway, provided all
interpretations were correct.
In our response, we indicated that when transported by highway, § 173.306 excepts limited
transportation by air); and (2) specification packaging requirements when packaged in
quantities of certain compressed gases from: (1) labeling (except when intended for further
accordance with paragraphs (a)(1) through (a)(4) of § 173.306, unless required as a condition of
the exception. Each package may not exceed 30 kg (66 pounds) gross weight. In addition,
these shipments are not subject to: subpart F (Placarding) of part 172; part 174, except
§ 174.24; and part 177, except § 177.817.
It was not out intention to imply that a 55-gallon steel drum is an acceptable packaging for
"Exceptions" column of the HMT. The HMR does not authorize aerosols to be transported in a
aerosols. The only packaging section for this material is § 173.306 as indicated under the
package with a gross weight that is greater then 30 kg (66 pounds).
I hope this information is helpful.
Sincerely,
Chief. Standards Development
Office of Hazardous Materials Standards
173.306 (a)
070067R

<<<PAGE 2>>>

Foster
8173.306 (9)
-
Alcoa
ALCOA
Cylinders
1050 Sycar
07-0067
Tel: 1 815 4€
Manteno. IL
Fax: 1 815 46
March 23, 2007
Mr. Edward T. Mazzullo
Director, Office of Hazardous Materials Standards
U.S. DOT/PHMSA (PHH-10)
400 7th Street S.W
Washington, D.C. 20590-0001
RE: Request for clarification of 49 CFR 173.306(a)
Dear Mr. Mazzullo:
I am requesting clarification of section 49 CFR 173.306(a) concerning shipments over the
highway of limited quantities of compressed gases. Please verify the following
information so that my understanding of this section is correct.
• Section 49 CFR 173.306(a) provides labeling and packing exceptions to part 172
or compressed gases only when offered as a limited quantity not exceeding
gross weight of 30 kg (66 pounds)
• A fifty-five gallon steel drum (specification 1A2) used as an outer packing for
ontaining aerosols and having a gross weight in excess of 30 kg (66 pounds) ma
e offered and shipped over the highway provided that all applicable labeling an
packing requirements of part 172 are obeyed.
Please advise. My mailing address can be found in header of this letter.
Sincerely,
Chris Meeks
EHS Manager
Alcoa Kama

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2007/070067R.pdf>
- Source ID: `phmsa`
- SHA-256: `7b34d3b7069145da6d0e321c69c2a0da8a2b803c4d5e1d02dd2fc91dc92c9e11`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T23:11:28.484Z
- Document slug: `phmsa-interpretation-07-0067r`

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