# PurePak Corporation — Hazardous Materials Safety Interpretation

**Citation:** 05-0065  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2005-04-14

05-0065 response to PurePak Corporation concerning 173.158.

## Document text

<<<PAGE 1>>>

U.S. Depaitment
400 Seventh Street, S.W.
of Transportation
Washington, D.C. 20590
Pipeline and
Administration
Hazardous Materials Safety
APR 14. 2005
Mr. David Giaccio
Ref. No. 05-0065
PurePak Corporation
324 S. Bracken Lane, Suite #3
Chandler, AZ 85224
Dear Mr. Giaccio:
This is in response to your March 22, 2005, letter requesting clarification of the Hazardous
packagings for the combination packaging specified in §173.158(f(3) must have a maximum
Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you ask if plastic inner
capacity that is not greater than 2.5 L or whether a larger container can be used and only filled
to 2.5 L.
Nitric acid of 70% or less concentration offered for transport by rail, highway, or water may
be packaged in certain combination packagings with plastic inner packagings not over 2.5 L
capacity further individually overpacked in tightly closed metal packagings (§ 173.158(f)(3)).
The use of the term "not over" means that you may not use a plastic inner packaging with a
maximum capacity greater than 2.5 L.
I hope this satisfies your request.
Sincerel
John A.
Gale
Office of Hazardous Materials Standards
Chief, Standards Development
173.158 A) (3))
050065

<<<PAGE 2>>>

MAR-22-2005 02:08FM FROM-SemiGrind Corporation
480-953-4094
T-020
$173.158() (3)
Combination Packägings
PurePak Corporation
05-0065
To: Edward Mazzullo
324 S. Bracker Lane Suite #3
Chandler AZ 85224
DOT/PHEMSA
DHM-10
480-926-0022
400 7" Street SW
Fax: 480-545-9288
Washington DC 20590
Fax number: 202-366-3012
Date: 3/22/2005
Regarding: Clarification of Maximum Quantity
Dear Sir:
I would like to obtain written clarification regarding the transportation of Nitric Acid UN
2031 PG 11.
packagings. Is 2.5L the brim or "Maximum Quantity" of the container, or can a larger
Sec. 173.158(f) (3) describes a combination package containing 2.5L plastic inner
container be used and filled to 2.5L?
Thank you in advance for your assistance.
Regards,
David Giaccio

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2005/050065.pdf>
- Source ID: `phmsa`
- SHA-256: `eb16a211b3d55ca29c6533e18cf56437146d140fcb777d40b4e49ec2a2214225`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-26T07:21:32.743Z
- Document slug: `phmsa-interpretation-05-0065`

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